diff --git a/src/apps/httpd/fs.c b/src/apps/httpd/fs.c new file mode 100644 index 00000000..3c983936 --- /dev/null +++ b/src/apps/httpd/fs.c @@ -0,0 +1,175 @@ +/* + * Copyright (c) 2001-2003 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels + * + */ + +#include "lwip/apps/httpd_opts.h" +#include "lwip/def.h" +#include "lwip/apps/fs.h" +#include "fsdata.h" +#include + +#if HTTPD_USE_CUSTOM_FSDATA +#include "fsdata_custom.c" +#else /* HTTPD_USE_CUSTOM_FSDATA */ +#include "fsdata.c" +#endif /* HTTPD_USE_CUSTOM_FSDATA */ + +/*-----------------------------------------------------------------------------------*/ + +#if LWIP_HTTPD_CUSTOM_FILES +int fs_open_custom(struct fs_file *file, const char *name); +void fs_close_custom(struct fs_file *file); +#if LWIP_HTTPD_FS_ASYNC_READ +u8_t fs_canread_custom(struct fs_file *file); +u8_t fs_wait_read_custom(struct fs_file *file, fs_wait_cb callback_fn, void *callback_arg); +#endif /* LWIP_HTTPD_FS_ASYNC_READ */ +#endif /* LWIP_HTTPD_CUSTOM_FILES */ + +/*-----------------------------------------------------------------------------------*/ +err_t +fs_open(struct fs_file *file, const char *name) +{ + const struct fsdata_file *f; + + if ((file == NULL) || (name == NULL)) { + return ERR_ARG; + } + +#if LWIP_HTTPD_CUSTOM_FILES + if (fs_open_custom(file, name)) { + file->is_custom_file = 1; + return ERR_OK; + } + file->is_custom_file = 0; +#endif /* LWIP_HTTPD_CUSTOM_FILES */ + + for (f = FS_ROOT; f != NULL; f = f->next) { + if (!strcmp(name, (const char *)f->name)) { + file->data = (const char *)f->data; + file->len = f->len; + file->index = f->len; + file->pextension = NULL; + file->http_header_included = f->http_header_included; +#if HTTPD_PRECALCULATED_CHECKSUM + file->chksum_count = f->chksum_count; + file->chksum = f->chksum; +#endif /* HTTPD_PRECALCULATED_CHECKSUM */ +#if LWIP_HTTPD_FILE_STATE + file->state = fs_state_init(file, name); +#endif /* #if LWIP_HTTPD_FILE_STATE */ + return ERR_OK; + } + } + /* file not found */ + return ERR_VAL; +} + +/*-----------------------------------------------------------------------------------*/ +void +fs_close(struct fs_file *file) +{ +#if LWIP_HTTPD_CUSTOM_FILES + if (file->is_custom_file) { + fs_close_custom(file); + } +#endif /* LWIP_HTTPD_CUSTOM_FILES */ +#if LWIP_HTTPD_FILE_STATE + fs_state_free(file, file->state); +#endif /* #if LWIP_HTTPD_FILE_STATE */ + LWIP_UNUSED_ARG(file); +} +/*-----------------------------------------------------------------------------------*/ +#if LWIP_HTTPD_DYNAMIC_FILE_READ +#if LWIP_HTTPD_FS_ASYNC_READ +int +fs_read_async(struct fs_file *file, char *buffer, int count, fs_wait_cb callback_fn, void *callback_arg) +#else /* LWIP_HTTPD_FS_ASYNC_READ */ +int +fs_read(struct fs_file *file, char *buffer, int count) +#endif /* LWIP_HTTPD_FS_ASYNC_READ */ +{ + int read; + + if(file->index == file->len) { + return FS_READ_EOF; + } +#if LWIP_HTTPD_FS_ASYNC_READ +#if LWIP_HTTPD_CUSTOM_FILES + if (!fs_canread_custom(file)) { + if (fs_wait_read_custom(file, callback_fn, callback_arg)) { + return FS_READ_DELAYED; + } + } +#else /* LWIP_HTTPD_CUSTOM_FILES */ + LWIP_UNUSED_ARG(callback_fn); + LWIP_UNUSED_ARG(callback_arg); +#endif /* LWIP_HTTPD_CUSTOM_FILES */ +#endif /* LWIP_HTTPD_FS_ASYNC_READ */ + + read = file->len - file->index; + if(read > count) { + read = count; + } + + MEMCPY(buffer, (file->data + file->index), read); + file->index += read; + + return(read); +} +#endif /* LWIP_HTTPD_DYNAMIC_FILE_READ */ +/*-----------------------------------------------------------------------------------*/ +#if LWIP_HTTPD_FS_ASYNC_READ +int +fs_is_file_ready(struct fs_file *file, fs_wait_cb callback_fn, void *callback_arg) +{ + if (file != NULL) { +#if LWIP_HTTPD_FS_ASYNC_READ +#if LWIP_HTTPD_CUSTOM_FILES + if (!fs_canread_custom(file)) { + if (fs_wait_read_custom(file, callback_fn, callback_arg)) { + return 0; + } + } +#else /* LWIP_HTTPD_CUSTOM_FILES */ + LWIP_UNUSED_ARG(callback_fn); + LWIP_UNUSED_ARG(callback_arg); +#endif /* LWIP_HTTPD_CUSTOM_FILES */ +#endif /* LWIP_HTTPD_FS_ASYNC_READ */ + } + return 1; +} +#endif /* LWIP_HTTPD_FS_ASYNC_READ */ +/*-----------------------------------------------------------------------------------*/ +int +fs_bytes_left(struct fs_file *file) +{ + return file->len - file->index; +} diff --git a/src/apps/httpd/fs/404.html b/src/apps/httpd/fs/404.html new file mode 100644 index 00000000..40b343a9 --- /dev/null +++ b/src/apps/httpd/fs/404.html @@ -0,0 +1,21 @@ + +lwIP - A Lightweight TCP/IP Stack + + + + +
+ SICS logo + +

lwIP - A Lightweight TCP/IP Stack

+

404 - Page not found

+

+ Sorry, the page you are requesting was not found on this + server. +

+ 		+   +
+ + diff --git a/src/apps/httpd/fs/img/sics.gif b/src/apps/httpd/fs/img/sics.gif new file mode 100644 index 00000000..0a4fc7bb Binary files /dev/null and b/src/apps/httpd/fs/img/sics.gif differ diff --git a/src/apps/httpd/fs/index.html b/src/apps/httpd/fs/index.html new file mode 100644 index 00000000..ab575ef0 --- /dev/null +++ b/src/apps/httpd/fs/index.html @@ -0,0 +1,47 @@ + +lwIP - A Lightweight TCP/IP Stack + + + + +
+ SICS logo + +

lwIP - A Lightweight TCP/IP Stack

+

+ The web page you are watching was served by a simple web + server running on top of the lightweight TCP/IP stack lwIP. +

+

+ lwIP is an open source implementation of the TCP/IP + protocol suite that was originally written by Adam Dunkels + of the Swedish Institute of Computer Science but now is + being actively developed by a team of developers + distributed world-wide. Since it's release, lwIP has + spurred a lot of interest and has been ported to several + platforms and operating systems. lwIP can be used either + with or without an underlying OS. +

+

+ The focus of the lwIP TCP/IP implementation is to reduce + the RAM usage while still having a full scale TCP. This + makes lwIP suitable for use in embedded systems with tens + of kilobytes of free RAM and room for around 40 kilobytes + of code ROM. +

+

+ More information about lwIP can be found at the lwIP + homepage at http://savannah.nongnu.org/projects/lwip/ + or at the lwIP wiki at http://lwip.wikia.com/. +

+ 		+   +
+ + + diff --git a/src/apps/httpd/fsdata.c b/src/apps/httpd/fsdata.c new file mode 100644 index 00000000..6170ce63 --- /dev/null +++ b/src/apps/httpd/fsdata.c @@ -0,0 +1,298 @@ +#include "lwip/apps/fs.h" +#include "lwip/def.h" +#include "fsdata.h" + + +#define file_NULL (struct fsdata_file *) NULL + + +static const unsigned int dummy_align__img_sics_gif = 0; +static const unsigned char data__img_sics_gif[] = { +/* /img/sics.gif (14 chars) */ +0x2f,0x69,0x6d,0x67,0x2f,0x73,0x69,0x63,0x73,0x2e,0x67,0x69,0x66,0x00,0x00,0x00, + +/* HTTP header */ +/* "HTTP/1.0 200 OK +" (17 bytes) */ +0x48,0x54,0x54,0x50,0x2f,0x31,0x2e,0x30,0x20,0x32,0x30,0x30,0x20,0x4f,0x4b,0x0d, +0x0a, +/* "Server: lwIP/1.3.1 (http://savannah.nongnu.org/projects/lwip) +" (63 bytes) */ +0x53,0x65,0x72,0x76,0x65,0x72,0x3a,0x20,0x6c,0x77,0x49,0x50,0x2f,0x31,0x2e,0x33, +0x2e,0x31,0x20,0x28,0x68,0x74,0x74,0x70,0x3a,0x2f,0x2f,0x73,0x61,0x76,0x61,0x6e, +0x6e,0x61,0x68,0x2e,0x6e,0x6f,0x6e,0x67,0x6e,0x75,0x2e,0x6f,0x72,0x67,0x2f,0x70, +0x72,0x6f,0x6a,0x65,0x63,0x74,0x73,0x2f,0x6c,0x77,0x69,0x70,0x29,0x0d,0x0a, +/* "Content-type: image/gif + +" (27 bytes) */ +0x43,0x6f,0x6e,0x74,0x65,0x6e,0x74,0x2d,0x74,0x79,0x70,0x65,0x3a,0x20,0x69,0x6d, +0x61,0x67,0x65,0x2f,0x67,0x69,0x66,0x0d,0x0a,0x0d,0x0a, +/* raw file data (724 bytes) */ +0x47,0x49,0x46,0x38,0x39,0x61,0x46,0x00,0x22,0x00,0xa5,0x00,0x00,0xd9,0x2b,0x39, +0x6a,0x6a,0x6a,0xbf,0xbf,0xbf,0x93,0x93,0x93,0x0f,0x0f,0x0f,0xb0,0xb0,0xb0,0xa6, +0xa6,0xa6,0x80,0x80,0x80,0x76,0x76,0x76,0x1e,0x1e,0x1e,0x9d,0x9d,0x9d,0x2e,0x2e, +0x2e,0x49,0x49,0x49,0x54,0x54,0x54,0x8a,0x8a,0x8a,0x60,0x60,0x60,0xc6,0xa6,0x99, +0xbd,0xb5,0xb2,0xc2,0xab,0xa1,0xd9,0x41,0x40,0xd5,0x67,0x55,0xc0,0xb0,0xaa,0xd5, +0x5e,0x4e,0xd6,0x50,0x45,0xcc,0x93,0x7d,0xc8,0xa1,0x90,0xce,0x8b,0x76,0xd2,0x7b, +0x65,0xd1,0x84,0x6d,0xc9,0x99,0x86,0x3a,0x3a,0x3a,0x00,0x00,0x00,0xb8,0xb8,0xb8, 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a/src/apps/httpd/fsdata.h b/src/apps/httpd/fsdata.h new file mode 100644 index 00000000..b315b3fa --- /dev/null +++ b/src/apps/httpd/fsdata.h @@ -0,0 +1,50 @@ +/* + * Copyright (c) 2001-2003 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels + * + */ +#ifndef LWIP_FSDATA_H +#define LWIP_FSDATA_H + +#include "lwip/apps/httpd_opts.h" +#include "lwip/apps/fs.h" + +struct fsdata_file { + const struct fsdata_file *next; + const unsigned char *name; + const unsigned char *data; + int len; + u8_t http_header_included; +#if HTTPD_PRECALCULATED_CHECKSUM + u16_t chksum_count; + const struct fsdata_chksum *chksum; +#endif /* HTTPD_PRECALCULATED_CHECKSUM */ +}; + +#endif /* LWIP_FSDATA_H */ diff --git a/src/apps/httpd/httpd.c b/src/apps/httpd/httpd.c new file mode 100644 index 00000000..dd47c9a0 --- /dev/null +++ b/src/apps/httpd/httpd.c @@ -0,0 +1,2399 @@ +/* + * Copyright (c) 2001-2003 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels + * Simon Goldschmidt + * + */ + +/* This httpd supports for a + * rudimentary server-side-include facility which will replace tags of the form + * in any file whose extension is .shtml, .shtm or .ssi with + * strings provided by an include handler whose pointer is provided to the + * module via function http_set_ssi_handler(). + * Additionally, a simple common + * gateway interface (CGI) handling mechanism has been added to allow clients + * to hook functions to particular request URIs. + * + * To enable SSI support, define label LWIP_HTTPD_SSI in lwipopts.h. + * To enable CGI support, define label LWIP_HTTPD_CGI in lwipopts.h. + * + * By default, the server assumes that HTTP headers are already present in + * each file stored in the file system. By defining LWIP_HTTPD_DYNAMIC_HEADERS in + * lwipopts.h, this behavior can be changed such that the server inserts the + * headers automatically based on the extension of the file being served. If + * this mode is used, be careful to ensure that the file system image used + * does not already contain the header information. + * + * File system images without headers can be created using the makefsfile + * tool with the -h command line option. + * + * + * Notes about valid SSI tags + * -------------------------- + * + * The following assumptions are made about tags used in SSI markers: + * + * 1. No tag may contain '-' or whitespace characters within the tag name. + * 2. Whitespace is allowed between the tag leadin "". + * 3. The maximum tag name length is LWIP_HTTPD_MAX_TAG_NAME_LEN, currently 8 characters. + * + * Notes on CGI usage + * ------------------ + * + * The simple CGI support offered here works with GET method requests only + * and can handle up to 16 parameters encoded into the URI. The handler + * function may not write directly to the HTTP output but must return a + * filename that the HTTP server will send to the browser as a response to + * the incoming CGI request. + * + * + * + * The list of supported file types is quite short, so if makefsdata complains + * about an unknown extension, make sure to add it (and its doctype) to + * the 'g_psHTTPHeaders' list. + */ +#include "lwip/apps/httpd.h" +#include "lwip/debug.h" +#include "lwip/stats.h" +#include "lwip/apps/fs.h" +#include "httpd_structs.h" +#include "lwip/tcp.h" + +#include +#include + +#if LWIP_TCP + +/** Minimum length for a valid HTTP/0.9 request: "GET /\r\n" -> 7 bytes */ +#define MIN_REQ_LEN 7 + +#define CRLF "\r\n" +#define HTTP11_CONNECTIONKEEPALIVE "Connection: keep-alive" + +#if LWIP_HTTPD_SSI +#define LWIP_HTTPD_IS_SSI(hs) ((hs)->ssi) +#else /* LWIP_HTTPD_SSI */ +#define LWIP_HTTPD_IS_SSI(hs) 0 +#endif /* LWIP_HTTPD_SSI */ + +/** These defines check whether tcp_write has to copy data or not */ + +/** This was TI's check whether to let TCP copy data or not +#define HTTP_IS_DATA_VOLATILE(hs) ((hs->file < (char *)0x20000000) ? 0 : TCP_WRITE_FLAG_COPY)*/ +#ifndef HTTP_IS_DATA_VOLATILE +#if LWIP_HTTPD_SSI +/* Copy for SSI files, no copy for non-SSI files */ +#define HTTP_IS_DATA_VOLATILE(hs) ((hs)->ssi ? TCP_WRITE_FLAG_COPY : 0) +#else /* LWIP_HTTPD_SSI */ +/** Default: don't copy if the data is sent from file-system directly */ +#define HTTP_IS_DATA_VOLATILE(hs) (((hs->file != NULL) && (hs->handle != NULL) && (hs->file == \ + (const char*)hs->handle->data + hs->handle->len - hs->left)) \ + ? 0 : TCP_WRITE_FLAG_COPY) +#endif /* LWIP_HTTPD_SSI */ +#endif + +/** Default: headers are sent from ROM */ +#ifndef HTTP_IS_HDR_VOLATILE +#define HTTP_IS_HDR_VOLATILE(hs, ptr) 0 +#endif + +/* Return values for http_send_*() */ +#define HTTP_DATA_TO_SEND_BREAK 2 +#define HTTP_DATA_TO_SEND_CONTINUE 1 +#define HTTP_NO_DATA_TO_SEND 0 + +typedef struct +{ + const char *name; + u8_t shtml; +} default_filename; + +const default_filename g_psDefaultFilenames[] = { + {"/index.shtml", 1 }, + {"/index.ssi", 1 }, + {"/index.shtm", 1 }, + {"/index.html", 0 }, + {"/index.htm", 0 } +}; + +#define NUM_DEFAULT_FILENAMES (sizeof(g_psDefaultFilenames) / \ + sizeof(default_filename)) + +#if LWIP_HTTPD_SUPPORT_REQUESTLIST +/** HTTP request is copied here from pbufs for simple parsing */ +static char httpd_req_buf[LWIP_HTTPD_MAX_REQ_LENGTH+1]; +#endif /* LWIP_HTTPD_SUPPORT_REQUESTLIST */ + +#if LWIP_HTTPD_SUPPORT_POST +/** Filename for response file to send when POST is finished */ +static char http_post_response_filename[LWIP_HTTPD_POST_MAX_RESPONSE_URI_LEN+1]; +#endif /* LWIP_HTTPD_SUPPORT_POST */ + +#if LWIP_HTTPD_DYNAMIC_HEADERS +/* The number of individual strings that comprise the headers sent before each + * requested file. + */ +#define NUM_FILE_HDR_STRINGS 3 +#endif /* LWIP_HTTPD_DYNAMIC_HEADERS */ + +#if LWIP_HTTPD_SSI + +#define HTTPD_LAST_TAG_PART 0xFFFF + +enum tag_check_state { + TAG_NONE, /* Not processing an SSI tag */ + TAG_LEADIN, /* Tag lead in "" being processed */ + TAG_SENDING /* Sending tag replacement string */ +}; + +struct http_ssi_state { + const char *parsed; /* Pointer to the first unparsed byte in buf. */ +#if !LWIP_HTTPD_SSI_INCLUDE_TAG + const char *tag_started;/* Pointer to the first opening '<' of the tag. */ +#endif /* !LWIP_HTTPD_SSI_INCLUDE_TAG */ + const char *tag_end; /* Pointer to char after the closing '>' of the tag. */ + u32_t parse_left; /* Number of unparsed bytes in buf. */ + u16_t tag_index; /* Counter used by tag parsing state machine */ + u16_t tag_insert_len; /* Length of insert in string tag_insert */ +#if LWIP_HTTPD_SSI_MULTIPART + u16_t tag_part; /* Counter passed to and changed by tag insertion function to insert multiple times */ +#endif /* LWIP_HTTPD_SSI_MULTIPART */ + u8_t tag_name_len; /* Length of the tag name in string tag_name */ + char tag_name[LWIP_HTTPD_MAX_TAG_NAME_LEN + 1]; /* Last tag name extracted */ + char tag_insert[LWIP_HTTPD_MAX_TAG_INSERT_LEN + 1]; /* Insert string for tag_name */ + enum tag_check_state tag_state; /* State of the tag processor */ +}; +#endif /* LWIP_HTTPD_SSI */ + +struct http_state { +#if LWIP_HTTPD_KILL_OLD_ON_CONNECTIONS_EXCEEDED + struct http_state *next; +#endif /* LWIP_HTTPD_KILL_OLD_ON_CONNECTIONS_EXCEEDED */ + struct fs_file file_handle; + struct fs_file *handle; + const char *file; /* Pointer to first unsent byte in buf. */ + + struct tcp_pcb *pcb; +#if LWIP_HTTPD_SUPPORT_REQUESTLIST + struct pbuf *req; +#endif /* LWIP_HTTPD_SUPPORT_REQUESTLIST */ + +#if LWIP_HTTPD_DYNAMIC_FILE_READ + char *buf; /* File read buffer. */ + int buf_len; /* Size of file read buffer, buf. */ +#endif /* LWIP_HTTPD_DYNAMIC_FILE_READ */ + u32_t left; /* Number of unsent bytes in buf. */ + u8_t retries; +#if LWIP_HTTPD_SUPPORT_11_KEEPALIVE + u8_t keepalive; +#endif /* LWIP_HTTPD_SUPPORT_11_KEEPALIVE */ +#if LWIP_HTTPD_SSI + struct http_ssi_state *ssi; +#endif /* LWIP_HTTPD_SSI */ +#if LWIP_HTTPD_CGI + char *params[LWIP_HTTPD_MAX_CGI_PARAMETERS]; /* Params extracted from the request URI */ + char *param_vals[LWIP_HTTPD_MAX_CGI_PARAMETERS]; /* Values for each extracted param */ +#endif /* LWIP_HTTPD_CGI */ +#if LWIP_HTTPD_DYNAMIC_HEADERS + const char *hdrs[NUM_FILE_HDR_STRINGS]; /* HTTP headers to be sent. */ + u16_t hdr_pos; /* The position of the first unsent header byte in the + current string */ + u16_t hdr_index; /* The index of the hdr string currently being sent. */ +#endif /* LWIP_HTTPD_DYNAMIC_HEADERS */ +#if LWIP_HTTPD_TIMING + u32_t time_started; +#endif /* LWIP_HTTPD_TIMING */ +#if LWIP_HTTPD_SUPPORT_POST + u32_t post_content_len_left; +#if LWIP_HTTPD_POST_MANUAL_WND + u32_t unrecved_bytes; + u8_t no_auto_wnd; + u8_t post_finished; +#endif /* LWIP_HTTPD_POST_MANUAL_WND */ +#endif /* LWIP_HTTPD_SUPPORT_POST*/ +}; + +#if HTTPD_USE_MEM_POOL +LWIP_MEMPOOL_DECLARE(HTTPD_STATE, 20, sizeof(struct http_state), "HTTPD_STATE") +#define HTTP_ALLOC_HTTP_STATE() (struct http_state *)LWIP_MEMPOOL_ALLOC(HTTPD_STATE) +#define HTTP_FREE_HTTP_STATE(x) LWIP_MEMPOOL_FREE(HTTPD_STATE, (x)) + +#if LWIP_HTTPD_SSI +LWIP_MEMPOOL_DECLARE(HTTPD_SSI_STATE, 20, sizeof(struct http_ssi_state), "HTTPD_SSI_STATE") +#define HTTP_ALLOC_SSI_STATE() (struct http_ssi_state *)LWIP_MEMPOOL_ALLOC(HTTPD_SSI_STATE) +#define HTTP_FREE_SSI_STATE(x) LWIP_MEMPOOL_FREE(HTTPD_SSI_STATE, (x)) +#endif /* LWIP_HTTPD_SSI */ +#else /* HTTPD_USE_MEM_POOL */ +#define HTTP_ALLOC_HTTP_STATE() (struct http_state *)mem_malloc(sizeof(struct http_state)) +#define HTTP_FREE_HTTP_STATE(x) mem_free(x) +#if LWIP_HTTPD_SSI +#define HTTP_ALLOC_SSI_STATE() (struct http_ssi_state *)mem_malloc(sizeof(struct http_ssi_state)) +#define HTTP_FREE_SSI_STATE(x) mem_free(x) +#endif /* LWIP_HTTPD_SSI */ +#endif /* HTTPD_USE_MEM_POOL */ + +static err_t http_close_conn(struct tcp_pcb *pcb, struct http_state *hs); +static err_t http_close_or_abort_conn(struct tcp_pcb *pcb, struct http_state *hs, u8_t abort_conn); +static err_t http_find_file(struct http_state *hs, const char *uri, int is_09); +static err_t http_init_file(struct http_state *hs, struct fs_file *file, int is_09, const char *uri, u8_t tag_check); +static err_t http_poll(void *arg, struct tcp_pcb *pcb); +static u8_t http_check_eof(struct tcp_pcb *pcb, struct http_state *hs); +#if LWIP_HTTPD_FS_ASYNC_READ +static void http_continue(void *connection); +#endif /* LWIP_HTTPD_FS_ASYNC_READ */ + +#if LWIP_HTTPD_SSI +/* SSI insert handler function pointer. */ +tSSIHandler g_pfnSSIHandler = NULL; +int g_iNumTags = 0; +const char **g_ppcTags = NULL; + +#define LEN_TAG_LEAD_IN 5 +const char * const g_pcTagLeadIn = ""; +#endif /* LWIP_HTTPD_SSI */ + +#if LWIP_HTTPD_CGI +/* CGI handler information */ +const tCGI *g_pCGIs; +int g_iNumCGIs; +#endif /* LWIP_HTTPD_CGI */ + +#if LWIP_HTTPD_KILL_OLD_ON_CONNECTIONS_EXCEEDED +/** global list of active HTTP connections, use to kill the oldest when + running out of memory */ +static struct http_state *http_connections; +#endif /* LWIP_HTTPD_KILL_OLD_ON_CONNECTIONS_EXCEEDED */ + +#if LWIP_HTTPD_STRNSTR_PRIVATE +/** Like strstr but does not need 'buffer' to be NULL-terminated */ +static char* +strnstr(const char* buffer, const char* token, size_t n) +{ + const char* p; + int tokenlen = (int)strlen(token); + if (tokenlen == 0) { + return (char *)(size_t)buffer; /* cast to size_t is a hack to cast away constness */ + } + for (p = buffer; *p && (p + tokenlen <= buffer + n); p++) { + if ((*p == *token) && (strncmp(p, token, tokenlen) == 0)) { + return (char *)(size_t)p; /* cast to size_t is a hack to cast away constness */ + } + } + return NULL; +} +#endif /* LWIP_HTTPD_STRNSTR_PRIVATE */ + +#if LWIP_HTTPD_KILL_OLD_ON_CONNECTIONS_EXCEEDED +static void +http_kill_oldest_connection(u8_t ssi_required) +{ + struct http_state *hs = http_connections; + struct http_state *hs_free_next = NULL; + while(hs && hs->next) { +#if LWIP_HTTPD_SSI + if (ssi_required) { + if (hs->next->ssi != NULL) { + hs_free_next = hs; + } + } else +#else /* LWIP_HTTPD_SSI */ + LWIP_UNUSED_ARG(ssi_required); +#endif /* LWIP_HTTPD_SSI */ + { + hs_free_next = hs; + } + hs = hs->next; + } + if (hs_free_next != NULL) { + LWIP_ASSERT("hs_free_next->next != NULL", hs_free_next->next != NULL); + LWIP_ASSERT("hs_free_next->next->pcb != NULL", hs_free_next->next->pcb != NULL); + /* send RST when killing a connection because of memory shortage */ + http_close_or_abort_conn(hs_free_next->next->pcb, hs_free_next->next, 1); /* this also unlinks the http_state from the list */ + } +} +#endif /* LWIP_HTTPD_KILL_OLD_ON_CONNECTIONS_EXCEEDED */ + +#if LWIP_HTTPD_SSI +/** Allocate as struct http_ssi_state. */ +static struct http_ssi_state* +http_ssi_state_alloc(void) +{ + struct http_ssi_state *ret = HTTP_ALLOC_SSI_STATE(); +#if LWIP_HTTPD_KILL_OLD_ON_CONNECTIONS_EXCEEDED + if (ret == NULL) { + http_kill_oldest_connection(1); + ret = HTTP_ALLOC_SSI_STATE(); + } +#endif /* LWIP_HTTPD_KILL_OLD_ON_CONNECTIONS_EXCEEDED */ + if (ret != NULL) { + memset(ret, 0, sizeof(struct http_ssi_state)); + } + return ret; +} + +/** Free a struct http_ssi_state. */ +static void +http_ssi_state_free(struct http_ssi_state *ssi) +{ + if (ssi != NULL) { + HTTP_FREE_SSI_STATE(ssi); + } +} +#endif /* LWIP_HTTPD_SSI */ + +/** Initialize a struct http_state. + */ +static void +http_state_init(struct http_state* hs) +{ + /* Initialize the structure. */ + memset(hs, 0, sizeof(struct http_state)); +#if LWIP_HTTPD_DYNAMIC_HEADERS + /* Indicate that the headers are not yet valid */ + hs->hdr_index = NUM_FILE_HDR_STRINGS; +#endif /* LWIP_HTTPD_DYNAMIC_HEADERS */ +} + +/** Allocate a struct http_state. */ +static struct http_state* +http_state_alloc(void) +{ + struct http_state *ret = HTTP_ALLOC_HTTP_STATE(); +#if LWIP_HTTPD_KILL_OLD_ON_CONNECTIONS_EXCEEDED + if (ret == NULL) { + http_kill_oldest_connection(0); + ret = HTTP_ALLOC_HTTP_STATE(); + } +#endif /* LWIP_HTTPD_KILL_OLD_ON_CONNECTIONS_EXCEEDED */ + if (ret != NULL) { + http_state_init(ret); +#if LWIP_HTTPD_KILL_OLD_ON_CONNECTIONS_EXCEEDED + /* add the connection to the list */ + if (http_connections == NULL) { + http_connections = ret; + } else { + struct http_state *last; + for(last = http_connections; last->next != NULL; last = last->next); + LWIP_ASSERT("last != NULL", last != NULL); + last->next = ret; + } +#endif /* LWIP_HTTPD_KILL_OLD_ON_CONNECTIONS_EXCEEDED */ + } + return ret; +} + +/** Free a struct http_state. + * Also frees the file data if dynamic. + */ +static void +http_state_eof(struct http_state *hs) +{ + if(hs->handle) { +#if LWIP_HTTPD_TIMING + u32_t ms_needed = sys_now() - hs->time_started; + u32_t needed = LWIP_MAX(1, (ms_needed/100)); + LWIP_DEBUGF(HTTPD_DEBUG_TIMING, ("httpd: needed %"U32_F" ms to send file of %d bytes -> %"U32_F" bytes/sec\n", + ms_needed, hs->handle->len, ((((u32_t)hs->handle->len) * 10) / needed))); +#endif /* LWIP_HTTPD_TIMING */ + fs_close(hs->handle); + hs->handle = NULL; + } +#if LWIP_HTTPD_DYNAMIC_FILE_READ + if (hs->buf != NULL) { + mem_free(hs->buf); + hs->buf = NULL; + } +#endif /* LWIP_HTTPD_DYNAMIC_FILE_READ */ +#if LWIP_HTTPD_SSI + if (hs->ssi) { + http_ssi_state_free(hs->ssi); + hs->ssi = NULL; + } +#endif /* LWIP_HTTPD_SSI */ +#if LWIP_HTTPD_SUPPORT_REQUESTLIST + if (hs->req) { + pbuf_free(hs->req); + hs->req = NULL; + } +#endif /* LWIP_HTTPD_SUPPORT_REQUESTLIST */ +} + +/** Free a struct http_state. + * Also frees the file data if dynamic. + */ +static void +http_state_free(struct http_state *hs) +{ + if (hs != NULL) { + http_state_eof(hs); +#if LWIP_HTTPD_KILL_OLD_ON_CONNECTIONS_EXCEEDED + /* take the connection off the list */ + if (http_connections) { + if (http_connections == hs) { + http_connections = hs->next; + } else { + struct http_state *last; + for(last = http_connections; last->next != NULL; last = last->next) { + if (last->next == hs) { + last->next = hs->next; + break; + } + } + } + } +#endif /* LWIP_HTTPD_KILL_OLD_ON_CONNECTIONS_EXCEEDED */ + HTTP_FREE_HTTP_STATE(hs); + } +} + +/** Call tcp_write() in a loop trying smaller and smaller length + * + * @param pcb tcp_pcb to send + * @param ptr Data to send + * @param length Length of data to send (in/out: on return, contains the + * amount of data sent) + * @param apiflags directly passed to tcp_write + * @return the return value of tcp_write + */ +static err_t +http_write(struct tcp_pcb *pcb, const void* ptr, u16_t *length, u8_t apiflags) +{ + u16_t len, max_len; + err_t err; + LWIP_ASSERT("length != NULL", length != NULL); + len = *length; + if (len == 0) { + return ERR_OK; + } + /* We cannot send more data than space available in the send buffer. */ + max_len = tcp_sndbuf(pcb); + if (max_len < len) { + len = max_len; + } +#ifdef HTTPD_MAX_WRITE_LEN + /* Additional limitation: e.g. don't enqueue more than 2*mss at once */ + max_len = HTTPD_MAX_WRITE_LEN(pcb); + if(len > max_len) { + len = max_len; + } +#endif /* HTTPD_MAX_WRITE_LEN */ + do { + LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("Trying go send %d bytes\n", len)); + err = tcp_write(pcb, ptr, len, apiflags); + if (err == ERR_MEM) { + if ((tcp_sndbuf(pcb) == 0) || + (tcp_sndqueuelen(pcb) >= TCP_SND_QUEUELEN)) { + /* no need to try smaller sizes */ + len = 1; + } else { + len /= 2; + } + LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, + ("Send failed, trying less (%d bytes)\n", len)); + } + } while ((err == ERR_MEM) && (len > 1)); + + if (err == ERR_OK) { + LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("Sent %d bytes\n", len)); + *length = len; + } else { + LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("Send failed with err %d (\"%s\")\n", err, lwip_strerr(err))); + *length = 0; + } + + return err; +} + +/** + * The connection shall be actively closed (using RST to close from fault states). + * Reset the sent- and recv-callbacks. + * + * @param pcb the tcp pcb to reset callbacks + * @param hs connection state to free + */ +static err_t +http_close_or_abort_conn(struct tcp_pcb *pcb, struct http_state *hs, u8_t abort_conn) +{ + err_t err; + LWIP_DEBUGF(HTTPD_DEBUG, ("Closing connection %p\n", (void*)pcb)); + +#if LWIP_HTTPD_SUPPORT_POST + if (hs != NULL) { + if ((hs->post_content_len_left != 0) +#if LWIP_HTTPD_POST_MANUAL_WND + || ((hs->no_auto_wnd != 0) && (hs->unrecved_bytes != 0)) +#endif /* LWIP_HTTPD_POST_MANUAL_WND */ + ) { + /* make sure the post code knows that the connection is closed */ + http_post_response_filename[0] = 0; + httpd_post_finished(hs, http_post_response_filename, LWIP_HTTPD_POST_MAX_RESPONSE_URI_LEN); + } + } +#endif /* LWIP_HTTPD_SUPPORT_POST*/ + + + tcp_arg(pcb, NULL); + tcp_recv(pcb, NULL); + tcp_err(pcb, NULL); + tcp_poll(pcb, NULL, 0); + tcp_sent(pcb, NULL); + if (hs != NULL) { + http_state_free(hs); + } + + if (abort_conn) { + tcp_abort(pcb); + return ERR_OK; + } + err = tcp_close(pcb); + if (err != ERR_OK) { + LWIP_DEBUGF(HTTPD_DEBUG, ("Error %d closing %p\n", err, (void*)pcb)); + /* error closing, try again later in poll */ + tcp_poll(pcb, http_poll, HTTPD_POLL_INTERVAL); + } + return err; +} + +/** + * The connection shall be actively closed. + * Reset the sent- and recv-callbacks. + * + * @param pcb the tcp pcb to reset callbacks + * @param hs connection state to free + */ +static err_t +http_close_conn(struct tcp_pcb *pcb, struct http_state *hs) +{ + return http_close_or_abort_conn(pcb, hs, 0); +} + +/** End of file: either close the connection (Connection: close) or + * close the file (Connection: keep-alive) + */ +static void +http_eof(struct tcp_pcb *pcb, struct http_state *hs) +{ + /* HTTP/1.1 persistent connection? (Not supported for SSI) */ +#if LWIP_HTTPD_SUPPORT_11_KEEPALIVE + if (hs->keepalive && !LWIP_HTTPD_IS_SSI(hs)) { +#if LWIP_HTTPD_KILL_OLD_ON_CONNECTIONS_EXCEEDED + struct http_state* next = hs->next; +#endif + http_state_eof(hs); + http_state_init(hs); + /* restore state: */ +#if LWIP_HTTPD_KILL_OLD_ON_CONNECTIONS_EXCEEDED + hs->next = next; +#endif + hs->pcb = pcb; + hs->keepalive = 1; + } else +#endif /* LWIP_HTTPD_SUPPORT_11_KEEPALIVE */ + { + http_close_conn(pcb, hs); + } +} + +#if LWIP_HTTPD_CGI +/** + * Extract URI parameters from the parameter-part of an URI in the form + * "test.cgi?x=y" @todo: better explanation! + * Pointers to the parameters are stored in hs->param_vals. + * + * @param hs http connection state + * @param params pointer to the NULL-terminated parameter string from the URI + * @return number of parameters extracted + */ +static int +extract_uri_parameters(struct http_state *hs, char *params) +{ + char *pair; + char *equals; + int loop; + + /* If we have no parameters at all, return immediately. */ + if(!params || (params[0] == '\0')) { + return(0); + } + + /* Get a pointer to our first parameter */ + pair = params; + + /* Parse up to LWIP_HTTPD_MAX_CGI_PARAMETERS from the passed string and ignore the + * remainder (if any) */ + for(loop = 0; (loop < LWIP_HTTPD_MAX_CGI_PARAMETERS) && pair; loop++) { + + /* Save the name of the parameter */ + hs->params[loop] = pair; + + /* Remember the start of this name=value pair */ + equals = pair; + + /* Find the start of the next name=value pair and replace the delimiter + * with a 0 to terminate the previous pair string. */ + pair = strchr(pair, '&'); + if(pair) { + *pair = '\0'; + pair++; + } else { + /* We didn't find a new parameter so find the end of the URI and + * replace the space with a '\0' */ + pair = strchr(equals, ' '); + if(pair) { + *pair = '\0'; + } + + /* Revert to NULL so that we exit the loop as expected. */ + pair = NULL; + } + + /* Now find the '=' in the previous pair, replace it with '\0' and save + * the parameter value string. */ + equals = strchr(equals, '='); + if(equals) { + *equals = '\0'; + hs->param_vals[loop] = equals + 1; + } else { + hs->param_vals[loop] = NULL; + } + } + + return loop; +} +#endif /* LWIP_HTTPD_CGI */ + +#if LWIP_HTTPD_SSI +/** + * Insert a tag (found in an shtml in the form of "" into the file. + * The tag's name is stored in ssi->tag_name (NULL-terminated), the replacement + * should be written to hs->tag_insert (up to a length of LWIP_HTTPD_MAX_TAG_INSERT_LEN). + * The amount of data written is stored to ssi->tag_insert_len. + * + * @todo: return tag_insert_len - maybe it can be removed from struct http_state? + * + * @param hs http connection state + */ +static void +get_tag_insert(struct http_state *hs) +{ + int loop; + size_t len; + struct http_ssi_state *ssi; + LWIP_ASSERT("hs != NULL", hs != NULL); + ssi = hs->ssi; + LWIP_ASSERT("ssi != NULL", ssi != NULL); +#if LWIP_HTTPD_SSI_MULTIPART + u16_t current_tag_part = ssi->tag_part; + ssi->tag_part = HTTPD_LAST_TAG_PART; +#endif /* LWIP_HTTPD_SSI_MULTIPART */ + + if(g_pfnSSIHandler && g_ppcTags && g_iNumTags) { + + /* Find this tag in the list we have been provided. */ + for(loop = 0; loop < g_iNumTags; loop++) { + if(strcmp(ssi->tag_name, g_ppcTags[loop]) == 0) { + ssi->tag_insert_len = g_pfnSSIHandler(loop, ssi->tag_insert, + LWIP_HTTPD_MAX_TAG_INSERT_LEN +#if LWIP_HTTPD_SSI_MULTIPART + , current_tag_part, &ssi->tag_part +#endif /* LWIP_HTTPD_SSI_MULTIPART */ +#if LWIP_HTTPD_FILE_STATE + , hs->handle->state +#endif /* LWIP_HTTPD_FILE_STATE */ + ); + return; + } + } + } + + /* If we drop out, we were asked to serve a page which contains tags that + * we don't have a handler for. Merely echo back the tags with an error + * marker. */ +#define UNKNOWN_TAG1_TEXT "***UNKNOWN TAG " +#define UNKNOWN_TAG1_LEN 18 +#define UNKNOWN_TAG2_TEXT "***" +#define UNKNOWN_TAG2_LEN 7 + len = LWIP_MIN(sizeof(ssi->tag_name), LWIP_MIN(strlen(ssi->tag_name), + LWIP_HTTPD_MAX_TAG_INSERT_LEN - (UNKNOWN_TAG1_LEN + UNKNOWN_TAG2_LEN))); + MEMCPY(ssi->tag_insert, UNKNOWN_TAG1_TEXT, UNKNOWN_TAG1_LEN); + MEMCPY(&ssi->tag_insert[UNKNOWN_TAG1_LEN], ssi->tag_name, len); + MEMCPY(&ssi->tag_insert[UNKNOWN_TAG1_LEN + len], UNKNOWN_TAG2_TEXT, UNKNOWN_TAG2_LEN); + ssi->tag_insert[UNKNOWN_TAG1_LEN + len + UNKNOWN_TAG2_LEN] = 0; + + len = strlen(ssi->tag_insert); + LWIP_ASSERT("len <= 0xffff", len <= 0xffff); + ssi->tag_insert_len = (u16_t)len; +} +#endif /* LWIP_HTTPD_SSI */ + +#if LWIP_HTTPD_DYNAMIC_HEADERS +/** + * Generate the relevant HTTP headers for the given filename and write + * them into the supplied buffer. + */ +static void +get_http_headers(struct http_state *pState, char *pszURI) +{ + unsigned int iLoop; + char *pszWork; + char *pszExt; + char *pszVars; + + /* Ensure that we initialize the loop counter. */ + iLoop = 0; + + /* In all cases, the second header we send is the server identification + so set it here. */ + pState->hdrs[1] = g_psHTTPHeaderStrings[HTTP_HDR_SERVER]; + + /* Is this a normal file or the special case we use to send back the + default "404: Page not found" response? */ + if (pszURI == NULL) { + pState->hdrs[0] = g_psHTTPHeaderStrings[HTTP_HDR_NOT_FOUND]; + pState->hdrs[2] = g_psHTTPHeaderStrings[DEFAULT_404_HTML]; + + /* Set up to send the first header string. */ + pState->hdr_index = 0; + pState->hdr_pos = 0; + return; + } else { + /* We are dealing with a particular filename. Look for one other + special case. We assume that any filename with "404" in it must be + indicative of a 404 server error whereas all other files require + the 200 OK header. */ + if (strstr(pszURI, "404")) { + pState->hdrs[0] = g_psHTTPHeaderStrings[HTTP_HDR_NOT_FOUND]; + } else if (strstr(pszURI, "400")) { + pState->hdrs[0] = g_psHTTPHeaderStrings[HTTP_HDR_BAD_REQUEST]; + } else if (strstr(pszURI, "501")) { + pState->hdrs[0] = g_psHTTPHeaderStrings[HTTP_HDR_NOT_IMPL]; + } else { + pState->hdrs[0] = g_psHTTPHeaderStrings[HTTP_HDR_OK]; + } + + /* Determine if the URI has any variables and, if so, temporarily remove + them. */ + pszVars = strchr(pszURI, '?'); + if(pszVars) { + *pszVars = '\0'; + } + + /* Get a pointer to the file extension. We find this by looking for the + last occurrence of "." in the filename passed. */ + pszExt = NULL; + pszWork = strchr(pszURI, '.'); + while(pszWork) { + pszExt = pszWork + 1; + pszWork = strchr(pszExt, '.'); + } + + /* Now determine the content type and add the relevant header for that. */ + for(iLoop = 0; (iLoop < NUM_HTTP_HEADERS) && pszExt; iLoop++) { + /* Have we found a matching extension? */ + if(!strcmp(g_psHTTPHeaders[iLoop].extension, pszExt)) { + pState->hdrs[2] = g_psHTTPHeaders[iLoop].content_type; + break; + } + } + + /* Reinstate the parameter marker if there was one in the original URI. */ + if(pszVars) { + *pszVars = '?'; + } + } + + /* Does the URL passed have any file extension? If not, we assume it + is a special-case URL used for control state notification and we do + not send any HTTP headers with the response. */ + if(!pszExt) { + /* Force the header index to a value indicating that all headers + have already been sent. */ + pState->hdr_index = NUM_FILE_HDR_STRINGS; + } else { + /* Did we find a matching extension? */ + if(iLoop == NUM_HTTP_HEADERS) { + /* No - use the default, plain text file type. */ + pState->hdrs[2] = HTTP_HDR_DEFAULT_TYPE; + } + + /* Set up to send the first header string. */ + pState->hdr_index = 0; + pState->hdr_pos = 0; + } +} + +/** Sub-function of http_send(): send dynamic headers + * + * @returns: - HTTP_NO_DATA_TO_SEND: no new data has been enqueued + * - HTTP_DATA_TO_SEND_CONTINUE: continue with sending HTTP body + * - HTTP_DATA_TO_SEND_BREAK: data has been enqueued, headers pending, + * so don't send HTTP body yet + */ +static u8_t +http_send_headers(struct tcp_pcb *pcb, struct http_state *hs) +{ + err_t err; + u16_t len; + u8_t data_to_send = HTTP_NO_DATA_TO_SEND; + u16_t hdrlen, sendlen; + + /* How much data can we send? */ + len = tcp_sndbuf(pcb); + sendlen = len; + + while(len && (hs->hdr_index < NUM_FILE_HDR_STRINGS) && sendlen) { + const void *ptr; + u16_t old_sendlen; + u8_t apiflags; + /* How much do we have to send from the current header? */ + hdrlen = (u16_t)strlen(hs->hdrs[hs->hdr_index]); + + /* How much of this can we send? */ + sendlen = (len < (hdrlen - hs->hdr_pos)) ? len : (hdrlen - hs->hdr_pos); + + /* Send this amount of data or as much as we can given memory + * constraints. */ + ptr = (const void *)(hs->hdrs[hs->hdr_index] + hs->hdr_pos); + old_sendlen = sendlen; + apiflags = HTTP_IS_HDR_VOLATILE(hs, ptr); + if (hs->hdr_index < NUM_FILE_HDR_STRINGS - 1) { + apiflags |= TCP_WRITE_FLAG_MORE; + } + err = http_write(pcb, ptr, &sendlen, apiflags); + if ((err == ERR_OK) && (old_sendlen != sendlen)) { + /* Remember that we added some more data to be transmitted. */ + data_to_send = HTTP_DATA_TO_SEND_CONTINUE; + } else if (err != ERR_OK) { + /* special case: http_write does not try to send 1 byte */ + sendlen = 0; + } + + /* Fix up the header position for the next time round. */ + hs->hdr_pos += sendlen; + len -= sendlen; + + /* Have we finished sending this string? */ + if(hs->hdr_pos == hdrlen) { + /* Yes - move on to the next one */ + hs->hdr_index++; + hs->hdr_pos = 0; + } + } + + if ((hs->hdr_index >= NUM_FILE_HDR_STRINGS) && (hs->file == NULL)) { + /* When we are at the end of the headers, check for data to send + * instead of waiting for ACK from remote side to continue + * (which would happen when sending files from async read). */ + http_check_eof(pcb, hs); + } + /* If we get here and there are still header bytes to send, we send + * the header information we just wrote immediately. If there are no + * more headers to send, but we do have file data to send, drop through + * to try to send some file data too. */ + if((hs->hdr_index < NUM_FILE_HDR_STRINGS) || !hs->file) { + LWIP_DEBUGF(HTTPD_DEBUG, ("tcp_output\n")); + return HTTP_DATA_TO_SEND_BREAK; + } + return data_to_send; +} +#endif /* LWIP_HTTPD_DYNAMIC_HEADERS */ + +/** Sub-function of http_send(): end-of-file (or block) is reached, + * either close the file or read the next block (if supported). + * + * @returns: 0 if the file is finished or no data has been read + * 1 if the file is not finished and data has been read + */ +static u8_t +http_check_eof(struct tcp_pcb *pcb, struct http_state *hs) +{ + int bytes_left; +#if LWIP_HTTPD_DYNAMIC_FILE_READ + int count; +#ifdef HTTPD_MAX_WRITE_LEN + int max_write_len; +#endif /* HTTPD_MAX_WRITE_LEN */ +#endif /* LWIP_HTTPD_DYNAMIC_FILE_READ */ + + /* Do we have a valid file handle? */ + if (hs->handle == NULL) { + /* No - close the connection. */ + http_eof(pcb, hs); + return 0; + } + bytes_left = fs_bytes_left(hs->handle); + if (bytes_left <= 0) { + /* We reached the end of the file so this request is done. */ + LWIP_DEBUGF(HTTPD_DEBUG, ("End of file.\n")); + http_eof(pcb, hs); + return 0; + } +#if LWIP_HTTPD_DYNAMIC_FILE_READ + /* Do we already have a send buffer allocated? */ + if(hs->buf) { + /* Yes - get the length of the buffer */ + count = hs->buf_len; + } else { + /* We don't have a send buffer so allocate one now */ + count = tcp_sndbuf(pcb); + if(bytes_left < count) { + count = bytes_left; + } +#ifdef HTTPD_MAX_WRITE_LEN + /* Additional limitation: e.g. don't enqueue more than 2*mss at once */ + max_write_len = HTTPD_MAX_WRITE_LEN(pcb); + if (count > max_write_len) { + count = max_write_len; + } +#endif /* HTTPD_MAX_WRITE_LEN */ + do { + hs->buf = (char*)mem_malloc((mem_size_t)count); + if (hs->buf != NULL) { + hs->buf_len = count; + break; + } + count = count / 2; + } while (count > 100); + + /* Did we get a send buffer? If not, return immediately. */ + if (hs->buf == NULL) { + LWIP_DEBUGF(HTTPD_DEBUG, ("No buff\n")); + return 0; + } + } + + /* Read a block of data from the file. */ + LWIP_DEBUGF(HTTPD_DEBUG, ("Trying to read %d bytes.\n", count)); + +#if LWIP_HTTPD_FS_ASYNC_READ + count = fs_read_async(hs->handle, hs->buf, count, http_continue, hs); +#else /* LWIP_HTTPD_FS_ASYNC_READ */ + count = fs_read(hs->handle, hs->buf, count); +#endif /* LWIP_HTTPD_FS_ASYNC_READ */ + if (count < 0) { + if (count == FS_READ_DELAYED) { + /* Delayed read, wait for FS to unblock us */ + return 0; + } + /* We reached the end of the file so this request is done. + * @todo: don't close here for HTTP/1.1? */ + LWIP_DEBUGF(HTTPD_DEBUG, ("End of file.\n")); + http_eof(pcb, hs); + return 0; + } + + /* Set up to send the block of data we just read */ + LWIP_DEBUGF(HTTPD_DEBUG, ("Read %d bytes.\n", count)); + hs->left = count; + hs->file = hs->buf; +#if LWIP_HTTPD_SSI + if (hs->ssi) { + hs->ssi->parse_left = count; + hs->ssi->parsed = hs->buf; + } +#endif /* LWIP_HTTPD_SSI */ +#else /* LWIP_HTTPD_DYNAMIC_FILE_READ */ + LWIP_ASSERT("SSI and DYNAMIC_HEADERS turned off but eof not reached", 0); +#endif /* LWIP_HTTPD_SSI || LWIP_HTTPD_DYNAMIC_HEADERS */ + return 1; +} + +/** Sub-function of http_send(): This is the normal send-routine for non-ssi files + * + * @returns: - 1: data has been written (so call tcp_ouput) + * - 0: no data has been written (no need to call tcp_output) + */ +static u8_t +http_send_data_nonssi(struct tcp_pcb *pcb, struct http_state *hs) +{ + err_t err; + u16_t len; + u8_t data_to_send = 0; + + /* We are not processing an SHTML file so no tag checking is necessary. + * Just send the data as we received it from the file. */ + len = (u16_t)LWIP_MIN(hs->left, 0xffff); + + err = http_write(pcb, hs->file, &len, HTTP_IS_DATA_VOLATILE(hs)); + if (err == ERR_OK) { + data_to_send = 1; + hs->file += len; + hs->left -= len; + } + + return data_to_send; +} + +#if LWIP_HTTPD_SSI +/** Sub-function of http_send(): This is the send-routine for ssi files + * + * @returns: - 1: data has been written (so call tcp_ouput) + * - 0: no data has been written (no need to call tcp_output) + */ +static u8_t +http_send_data_ssi(struct tcp_pcb *pcb, struct http_state *hs) +{ + err_t err = ERR_OK; + u16_t len; + u8_t data_to_send = 0; + + struct http_ssi_state *ssi = hs->ssi; + LWIP_ASSERT("ssi != NULL", ssi != NULL); + /* We are processing an SHTML file so need to scan for tags and replace + * them with insert strings. We need to be careful here since a tag may + * straddle the boundary of two blocks read from the file and we may also + * have to split the insert string between two tcp_write operations. */ + + /* How much data could we send? */ + len = tcp_sndbuf(pcb); + + /* Do we have remaining data to send before parsing more? */ + if(ssi->parsed > hs->file) { + len = (u16_t)LWIP_MIN(ssi->parsed - hs->file, 0xffff); + + err = http_write(pcb, hs->file, &len, HTTP_IS_DATA_VOLATILE(hs)); + if (err == ERR_OK) { + data_to_send = 1; + hs->file += len; + hs->left -= len; + } + + /* If the send buffer is full, return now. */ + if(tcp_sndbuf(pcb) == 0) { + return data_to_send; + } + } + + LWIP_DEBUGF(HTTPD_DEBUG, ("State %d, %d left\n", ssi->tag_state, (int)ssi->parse_left)); + + /* We have sent all the data that was already parsed so continue parsing + * the buffer contents looking for SSI tags. */ + while((ssi->parse_left) && (err == ERR_OK)) { + if (len == 0) { + return data_to_send; + } + switch(ssi->tag_state) { + case TAG_NONE: + /* We are not currently processing an SSI tag so scan for the + * start of the lead-in marker. */ + if(*ssi->parsed == g_pcTagLeadIn[0]) { + /* We found what could be the lead-in for a new tag so change + * state appropriately. */ + ssi->tag_state = TAG_LEADIN; + ssi->tag_index = 1; +#if !LWIP_HTTPD_SSI_INCLUDE_TAG + ssi->tag_started = ssi->parsed; +#endif /* !LWIP_HTTPD_SSI_INCLUDE_TAG */ + } + + /* Move on to the next character in the buffer */ + ssi->parse_left--; + ssi->parsed++; + break; + + case TAG_LEADIN: + /* We are processing the lead-in marker, looking for the start of + * the tag name. */ + + /* Have we reached the end of the leadin? */ + if(ssi->tag_index == LEN_TAG_LEAD_IN) { + ssi->tag_index = 0; + ssi->tag_state = TAG_FOUND; + } else { + /* Have we found the next character we expect for the tag leadin? */ + if(*ssi->parsed == g_pcTagLeadIn[ssi->tag_index]) { + /* Yes - move to the next one unless we have found the complete + * leadin, in which case we start looking for the tag itself */ + ssi->tag_index++; + } else { + /* We found an unexpected character so this is not a tag. Move + * back to idle state. */ + ssi->tag_state = TAG_NONE; + } + + /* Move on to the next character in the buffer */ + ssi->parse_left--; + ssi->parsed++; + } + break; + + case TAG_FOUND: + /* We are reading the tag name, looking for the start of the + * lead-out marker and removing any whitespace found. */ + + /* Remove leading whitespace between the tag leading and the first + * tag name character. */ + if((ssi->tag_index == 0) && ((*ssi->parsed == ' ') || + (*ssi->parsed == '\t') || (*ssi->parsed == '\n') || + (*ssi->parsed == '\r'))) { + /* Move on to the next character in the buffer */ + ssi->parse_left--; + ssi->parsed++; + break; + } + + /* Have we found the end of the tag name? This is signalled by + * us finding the first leadout character or whitespace */ + if((*ssi->parsed == g_pcTagLeadOut[0]) || + (*ssi->parsed == ' ') || (*ssi->parsed == '\t') || + (*ssi->parsed == '\n') || (*ssi->parsed == '\r')) { + + if(ssi->tag_index == 0) { + /* We read a zero length tag so ignore it. */ + ssi->tag_state = TAG_NONE; + } else { + /* We read a non-empty tag so go ahead and look for the + * leadout string. */ + ssi->tag_state = TAG_LEADOUT; + LWIP_ASSERT("ssi->tag_index <= 0xff", ssi->tag_index <= 0xff); + ssi->tag_name_len = (u8_t)ssi->tag_index; + ssi->tag_name[ssi->tag_index] = '\0'; + if(*ssi->parsed == g_pcTagLeadOut[0]) { + ssi->tag_index = 1; + } else { + ssi->tag_index = 0; + } + } + } else { + /* This character is part of the tag name so save it */ + if(ssi->tag_index < LWIP_HTTPD_MAX_TAG_NAME_LEN) { + ssi->tag_name[ssi->tag_index++] = *ssi->parsed; + } else { + /* The tag was too long so ignore it. */ + ssi->tag_state = TAG_NONE; + } + } + + /* Move on to the next character in the buffer */ + ssi->parse_left--; + ssi->parsed++; + + break; + + /* We are looking for the end of the lead-out marker. */ + case TAG_LEADOUT: + /* Remove leading whitespace between the tag leading and the first + * tag leadout character. */ + if((ssi->tag_index == 0) && ((*ssi->parsed == ' ') || + (*ssi->parsed == '\t') || (*ssi->parsed == '\n') || + (*ssi->parsed == '\r'))) { + /* Move on to the next character in the buffer */ + ssi->parse_left--; + ssi->parsed++; + break; + } + + /* Have we found the next character we expect for the tag leadout? */ + if(*ssi->parsed == g_pcTagLeadOut[ssi->tag_index]) { + /* Yes - move to the next one unless we have found the complete + * leadout, in which case we need to call the client to process + * the tag. */ + + /* Move on to the next character in the buffer */ + ssi->parse_left--; + ssi->parsed++; + + if(ssi->tag_index == (LEN_TAG_LEAD_OUT - 1)) { + /* Call the client to ask for the insert string for the + * tag we just found. */ +#if LWIP_HTTPD_SSI_MULTIPART + ssi->tag_part = 0; /* start with tag part 0 */ +#endif /* LWIP_HTTPD_SSI_MULTIPART */ + get_tag_insert(hs); + + /* Next time through, we are going to be sending data + * immediately, either the end of the block we start + * sending here or the insert string. */ + ssi->tag_index = 0; + ssi->tag_state = TAG_SENDING; + ssi->tag_end = ssi->parsed; +#if !LWIP_HTTPD_SSI_INCLUDE_TAG + ssi->parsed = ssi->tag_started; +#endif /* !LWIP_HTTPD_SSI_INCLUDE_TAG*/ + + /* If there is any unsent data in the buffer prior to the + * tag, we need to send it now. */ + if (ssi->tag_end > hs->file) { + /* How much of the data can we send? */ +#if LWIP_HTTPD_SSI_INCLUDE_TAG + len = (u16_t)LWIP_MIN(ssi->tag_end - hs->file, 0xffff); +#else /* LWIP_HTTPD_SSI_INCLUDE_TAG*/ + /* we would include the tag in sending */ + len = (u16_t)LWIP_MIN(ssi->tag_started - hs->file, 0xffff); +#endif /* LWIP_HTTPD_SSI_INCLUDE_TAG*/ + + err = http_write(pcb, hs->file, &len, HTTP_IS_DATA_VOLATILE(hs)); + if (err == ERR_OK) { + data_to_send = 1; +#if !LWIP_HTTPD_SSI_INCLUDE_TAG + if(ssi->tag_started <= hs->file) { + /* pretend to have sent the tag, too */ + len += ssi->tag_end - ssi->tag_started; + } +#endif /* !LWIP_HTTPD_SSI_INCLUDE_TAG*/ + hs->file += len; + hs->left -= len; + } + } + } else { + ssi->tag_index++; + } + } else { + /* We found an unexpected character so this is not a tag. Move + * back to idle state. */ + ssi->parse_left--; + ssi->parsed++; + ssi->tag_state = TAG_NONE; + } + break; + + /* + * We have found a valid tag and are in the process of sending + * data as a result of that discovery. We send either remaining data + * from the file prior to the insert point or the insert string itself. + */ + case TAG_SENDING: + /* Do we have any remaining file data to send from the buffer prior + * to the tag? */ + if(ssi->tag_end > hs->file) { + /* How much of the data can we send? */ +#if LWIP_HTTPD_SSI_INCLUDE_TAG + len = (u16_t)LWIP_MIN(ssi->tag_end - hs->file, 0xffff); +#else /* LWIP_HTTPD_SSI_INCLUDE_TAG*/ + LWIP_ASSERT("hs->started >= hs->file", ssi->tag_started >= hs->file); + /* we would include the tag in sending */ + len = (u16_t)LWIP_MIN(ssi->tag_started - hs->file, 0xffff); +#endif /* LWIP_HTTPD_SSI_INCLUDE_TAG*/ + if (len != 0) { + err = http_write(pcb, hs->file, &len, HTTP_IS_DATA_VOLATILE(hs)); + } else { + err = ERR_OK; + } + if (err == ERR_OK) { + data_to_send = 1; +#if !LWIP_HTTPD_SSI_INCLUDE_TAG + if(ssi->tag_started <= hs->file) { + /* pretend to have sent the tag, too */ + len += ssi->tag_end - ssi->tag_started; + } +#endif /* !LWIP_HTTPD_SSI_INCLUDE_TAG*/ + hs->file += len; + hs->left -= len; + } + } else { +#if LWIP_HTTPD_SSI_MULTIPART + if(ssi->tag_index >= ssi->tag_insert_len) { + /* Did the last SSIHandler have more to send? */ + if (ssi->tag_part != HTTPD_LAST_TAG_PART) { + /* If so, call it again */ + ssi->tag_index = 0; + get_tag_insert(hs); + } + } +#endif /* LWIP_HTTPD_SSI_MULTIPART */ + + /* Do we still have insert data left to send? */ + if(ssi->tag_index < ssi->tag_insert_len) { + /* We are sending the insert string itself. How much of the + * insert can we send? */ + len = (ssi->tag_insert_len - ssi->tag_index); + + /* Note that we set the copy flag here since we only have a + * single tag insert buffer per connection. If we don't do + * this, insert corruption can occur if more than one insert + * is processed before we call tcp_output. */ + err = http_write(pcb, &(ssi->tag_insert[ssi->tag_index]), &len, + HTTP_IS_TAG_VOLATILE(hs)); + if (err == ERR_OK) { + data_to_send = 1; + ssi->tag_index += len; + /* Don't return here: keep on sending data */ + } + } else { +#if LWIP_HTTPD_SSI_MULTIPART + if (ssi->tag_part == HTTPD_LAST_TAG_PART) +#endif /* LWIP_HTTPD_SSI_MULTIPART */ + { + /* We have sent all the insert data so go back to looking for + * a new tag. */ + LWIP_DEBUGF(HTTPD_DEBUG, ("Everything sent.\n")); + ssi->tag_index = 0; + ssi->tag_state = TAG_NONE; +#if !LWIP_HTTPD_SSI_INCLUDE_TAG + ssi->parsed = ssi->tag_end; +#endif /* !LWIP_HTTPD_SSI_INCLUDE_TAG*/ + } + } + break; + } + default: + LWIP_ASSERT("Unknown state", 0); + break; + } + } + + /* If we drop out of the end of the for loop, this implies we must have + * file data to send so send it now. In TAG_SENDING state, we've already + * handled this so skip the send if that's the case. */ + if((ssi->tag_state != TAG_SENDING) && (ssi->parsed > hs->file)) { + len = (u16_t)LWIP_MIN(ssi->parsed - hs->file, 0xffff); + + err = http_write(pcb, hs->file, &len, HTTP_IS_DATA_VOLATILE(hs)); + if (err == ERR_OK) { + data_to_send = 1; + hs->file += len; + hs->left -= len; + } + } + return data_to_send; +} +#endif /* LWIP_HTTPD_SSI */ + +/** + * Try to send more data on this pcb. + * + * @param pcb the pcb to send data + * @param hs connection state + */ +static u8_t +http_send(struct tcp_pcb *pcb, struct http_state *hs) +{ + u8_t data_to_send = HTTP_NO_DATA_TO_SEND; + + LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("http_send: pcb=%p hs=%p left=%d\n", (void*)pcb, + (void*)hs, hs != NULL ? (int)hs->left : 0)); + +#if LWIP_HTTPD_SUPPORT_POST && LWIP_HTTPD_POST_MANUAL_WND + if (hs->unrecved_bytes != 0) { + return 0; + } +#endif /* LWIP_HTTPD_SUPPORT_POST && LWIP_HTTPD_POST_MANUAL_WND */ + + /* If we were passed a NULL state structure pointer, ignore the call. */ + if (hs == NULL) { + return 0; + } + +#if LWIP_HTTPD_FS_ASYNC_READ + /* Check if we are allowed to read from this file. + (e.g. SSI might want to delay sending until data is available) */ + if (!fs_is_file_ready(hs->handle, http_continue, hs)) { + return 0; + } +#endif /* LWIP_HTTPD_FS_ASYNC_READ */ + +#if LWIP_HTTPD_DYNAMIC_HEADERS + /* Do we have any more header data to send for this file? */ + if(hs->hdr_index < NUM_FILE_HDR_STRINGS) { + data_to_send = http_send_headers(pcb, hs); + if (data_to_send != HTTP_DATA_TO_SEND_CONTINUE) { + return data_to_send; + } + } +#endif /* LWIP_HTTPD_DYNAMIC_HEADERS */ + + /* Have we run out of file data to send? If so, we need to read the next + * block from the file. */ + if (hs->left == 0) { + if (!http_check_eof(pcb, hs)) { + return 0; + } + } + +#if LWIP_HTTPD_SSI + if(hs->ssi) { + data_to_send = http_send_data_ssi(pcb, hs); + } else +#endif /* LWIP_HTTPD_SSI */ + { + data_to_send = http_send_data_nonssi(pcb, hs); + } + + if((hs->left == 0) && (fs_bytes_left(hs->handle) <= 0)) { + /* We reached the end of the file so this request is done. + * This adds the FIN flag right into the last data segment. */ + LWIP_DEBUGF(HTTPD_DEBUG, ("End of file.\n")); + http_eof(pcb, hs); + return 0; + } + LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("send_data end.\n")); + return data_to_send; +} + +#if LWIP_HTTPD_SUPPORT_EXTSTATUS +/** Initialize a http connection with a file to send for an error message + * + * @param hs http connection state + * @param error_nr HTTP error number + * @return ERR_OK if file was found and hs has been initialized correctly + * another err_t otherwise + */ +static err_t +http_find_error_file(struct http_state *hs, u16_t error_nr) +{ + const char *uri1, *uri2, *uri3; + err_t err; + + if (error_nr == 501) { + uri1 = "/501.html"; + uri2 = "/501.htm"; + uri3 = "/501.shtml"; + } else { + /* 400 (bad request is the default) */ + uri1 = "/400.html"; + uri2 = "/400.htm"; + uri3 = "/400.shtml"; + } + err = fs_open(&hs->file_handle, uri1); + if (err != ERR_OK) { + err = fs_open(&hs->file_handle, uri2); + if (err != ERR_OK) { + err = fs_open(&hs->file_handle, uri3); + if (err != ERR_OK) { + LWIP_DEBUGF(HTTPD_DEBUG, ("Error page for error %"U16_F" not found\n", + error_nr)); + return ERR_ARG; + } + } + } + return http_init_file(hs, &hs->file_handle, 0, NULL, 0); +} +#else /* LWIP_HTTPD_SUPPORT_EXTSTATUS */ +#define http_find_error_file(hs, error_nr) ERR_ARG +#endif /* LWIP_HTTPD_SUPPORT_EXTSTATUS */ + +/** + * Get the file struct for a 404 error page. + * Tries some file names and returns NULL if none found. + * + * @param uri pointer that receives the actual file name URI + * @return file struct for the error page or NULL no matching file was found + */ +static struct fs_file * +http_get_404_file(struct http_state *hs, const char **uri) +{ + err_t err; + + *uri = "/404.html"; + err = fs_open(&hs->file_handle, *uri); + if (err != ERR_OK) { + /* 404.html doesn't exist. Try 404.htm instead. */ + *uri = "/404.htm"; + err = fs_open(&hs->file_handle, *uri); + if (err != ERR_OK) { + /* 404.htm doesn't exist either. Try 404.shtml instead. */ + *uri = "/404.shtml"; + err = fs_open(&hs->file_handle, *uri); + if (err != ERR_OK) { + /* 404.htm doesn't exist either. Indicate to the caller that it should + * send back a default 404 page. + */ + *uri = NULL; + return NULL; + } + } + } + + return &hs->file_handle; +} + +#if LWIP_HTTPD_SUPPORT_POST +static err_t +http_handle_post_finished(struct http_state *hs) +{ +#if LWIP_HTTPD_POST_MANUAL_WND + /* Prevent multiple calls to httpd_post_finished, since it might have already + been called before from httpd_post_data_recved(). */ + if (hs->post_finished) { + return ERR_OK; + } + hs->post_finished = 1; +#endif /* LWIP_HTTPD_POST_MANUAL_WND */ + /* application error or POST finished */ + /* NULL-terminate the buffer */ + http_post_response_filename[0] = 0; + httpd_post_finished(hs, http_post_response_filename, LWIP_HTTPD_POST_MAX_RESPONSE_URI_LEN); + return http_find_file(hs, http_post_response_filename, 0); +} + +/** Pass received POST body data to the application and correctly handle + * returning a response document or closing the connection. + * ATTENTION: The application is responsible for the pbuf now, so don't free it! + * + * @param hs http connection state + * @param p pbuf to pass to the application + * @return ERR_OK if passed successfully, another err_t if the response file + * hasn't been found (after POST finished) + */ +static err_t +http_post_rxpbuf(struct http_state *hs, struct pbuf *p) +{ + err_t err; + + /* adjust remaining Content-Length */ + if (hs->post_content_len_left < p->tot_len) { + hs->post_content_len_left = 0; + } else { + hs->post_content_len_left -= p->tot_len; + } + err = httpd_post_receive_data(hs, p); + if (err != ERR_OK) { + /* Ignore remaining content in case of application error */ + hs->post_content_len_left = 0; + } + if (hs->post_content_len_left == 0) { +#if LWIP_HTTPD_SUPPORT_POST && LWIP_HTTPD_POST_MANUAL_WND + if (hs->unrecved_bytes != 0) { + return ERR_OK; + } +#endif /* LWIP_HTTPD_SUPPORT_POST && LWIP_HTTPD_POST_MANUAL_WND */ + /* application error or POST finished */ + return http_handle_post_finished(hs); + } + + return ERR_OK; +} + +/** Handle a post request. Called from http_parse_request when method 'POST' + * is found. + * + * @param p The input pbuf (containing the POST header and body). + * @param hs The http connection state. + * @param data HTTP request (header and part of body) from input pbuf(s). + * @param data_len Size of 'data'. + * @param uri The HTTP URI parsed from input pbuf(s). + * @param uri_end Pointer to the end of 'uri' (here, the rest of the HTTP + * header starts). + * @return ERR_OK: POST correctly parsed and accepted by the application. + * ERR_INPROGRESS: POST not completely parsed (no error yet) + * another err_t: Error parsing POST or denied by the application + */ +static err_t +http_post_request(struct pbuf *inp, struct http_state *hs, + char *data, u16_t data_len, char *uri, char *uri_end) +{ + err_t err; + /* search for end-of-header (first double-CRLF) */ + char* crlfcrlf = strnstr(uri_end + 1, CRLF CRLF, data_len - (uri_end + 1 - data)); + + if (crlfcrlf != NULL) { + /* search for "Content-Length: " */ +#define HTTP_HDR_CONTENT_LEN "Content-Length: " +#define HTTP_HDR_CONTENT_LEN_LEN 16 +#define HTTP_HDR_CONTENT_LEN_DIGIT_MAX_LEN 10 + char *scontent_len = strnstr(uri_end + 1, HTTP_HDR_CONTENT_LEN, crlfcrlf - (uri_end + 1)); + if (scontent_len != NULL) { + char *scontent_len_end = strnstr(scontent_len + HTTP_HDR_CONTENT_LEN_LEN, CRLF, HTTP_HDR_CONTENT_LEN_DIGIT_MAX_LEN); + if (scontent_len_end != NULL) { + int content_len; + char *conten_len_num = scontent_len + HTTP_HDR_CONTENT_LEN_LEN; + content_len = atoi(conten_len_num); + if (content_len > 0) { + /* adjust length of HTTP header passed to application */ + const char *hdr_start_after_uri = uri_end + 1; + u16_t hdr_len = LWIP_MIN(data_len, crlfcrlf + 4 - data); + u16_t hdr_data_len = LWIP_MIN(data_len, crlfcrlf + 4 - hdr_start_after_uri); + u8_t post_auto_wnd = 1; + http_post_response_filename[0] = 0; + err = httpd_post_begin(hs, uri, hdr_start_after_uri, hdr_data_len, content_len, + http_post_response_filename, LWIP_HTTPD_POST_MAX_RESPONSE_URI_LEN, &post_auto_wnd); + if (err == ERR_OK) { + /* try to pass in data of the first pbuf(s) */ + struct pbuf *q = inp; + u16_t start_offset = hdr_len; +#if LWIP_HTTPD_POST_MANUAL_WND + hs->no_auto_wnd = !post_auto_wnd; +#endif /* LWIP_HTTPD_POST_MANUAL_WND */ + /* set the Content-Length to be received for this POST */ + hs->post_content_len_left = (u32_t)content_len; + + /* get to the pbuf where the body starts */ + while((q != NULL) && (q->len <= start_offset)) { + start_offset -= q->len; + q = q->next; + } + if (q != NULL) { + /* hide the remaining HTTP header */ + pbuf_header(q, -(s16_t)start_offset); +#if LWIP_HTTPD_POST_MANUAL_WND + if (!post_auto_wnd) { + /* already tcp_recved() this data... */ + hs->unrecved_bytes = q->tot_len; + } +#endif /* LWIP_HTTPD_POST_MANUAL_WND */ + pbuf_ref(q); + return http_post_rxpbuf(hs, q); + } else { + return ERR_OK; + } + } else { + /* return file passed from application */ + return http_find_file(hs, http_post_response_filename, 0); + } + } else { + LWIP_DEBUGF(HTTPD_DEBUG, ("POST received invalid Content-Length: %s\n", + conten_len_num)); + return ERR_ARG; + } + } + } + /* If we come here, headers are fully received (double-crlf), but Content-Length + was not included. Since this is currently the only supported method, we have + to fail in this case! */ + LWIP_DEBUGF(HTTPD_DEBUG, ("Error when parsing Content-Length\n")); + return ERR_ARG; + } + /* if we come here, the POST is incomplete */ +#if LWIP_HTTPD_SUPPORT_REQUESTLIST + return ERR_INPROGRESS; +#else /* LWIP_HTTPD_SUPPORT_REQUESTLIST */ + return ERR_ARG; +#endif /* LWIP_HTTPD_SUPPORT_REQUESTLIST */ +} + +#if LWIP_HTTPD_POST_MANUAL_WND +/** A POST implementation can call this function to update the TCP window. + * This can be used to throttle data reception (e.g. when received data is + * programmed to flash and data is received faster than programmed). + * + * @param connection A connection handle passed to httpd_post_begin for which + * httpd_post_finished has *NOT* been called yet! + * @param recved_len Length of data received (for window update) + */ +void httpd_post_data_recved(void *connection, u16_t recved_len) +{ + struct http_state *hs = (struct http_state*)connection; + if (hs != NULL) { + if (hs->no_auto_wnd) { + u16_t len = recved_len; + if (hs->unrecved_bytes >= recved_len) { + hs->unrecved_bytes -= recved_len; + } else { + LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_LEVEL_WARNING, ("httpd_post_data_recved: recved_len too big\n")); + len = (u16_t)hs->unrecved_bytes; + hs->unrecved_bytes = 0; + } + if (hs->pcb != NULL) { + if (len != 0) { + tcp_recved(hs->pcb, len); + } + if ((hs->post_content_len_left == 0) && (hs->unrecved_bytes == 0)) { + /* finished handling POST */ + http_handle_post_finished(hs); + http_send(hs->pcb, hs); + } + } + } + } +} +#endif /* LWIP_HTTPD_POST_MANUAL_WND */ + +#endif /* LWIP_HTTPD_SUPPORT_POST */ + +#if LWIP_HTTPD_FS_ASYNC_READ +/** Try to send more data if file has been blocked before + * This is a callback function passed to fs_read_async(). + */ +static void +http_continue(void *connection) +{ + struct http_state *hs = (struct http_state*)connection; + if (hs && (hs->pcb) && (hs->handle)) { + LWIP_ASSERT("hs->pcb != NULL", hs->pcb != NULL); + LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("httpd_continue: try to send more data\n")); + if (http_send(hs->pcb, hs)) { + /* If we wrote anything to be sent, go ahead and send it now. */ + LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("tcp_output\n")); + tcp_output(hs->pcb); + } + } +} +#endif /* LWIP_HTTPD_FS_ASYNC_READ */ + +/** + * When data has been received in the correct state, try to parse it + * as a HTTP request. + * + * @param p the received pbuf + * @param hs the connection state + * @param pcb the tcp_pcb which received this packet + * @return ERR_OK if request was OK and hs has been initialized correctly + * ERR_INPROGRESS if request was OK so far but not fully received + * another err_t otherwise + */ +static err_t +http_parse_request(struct pbuf *inp, struct http_state *hs, struct tcp_pcb *pcb) +{ + char *data; + char *crlf; + u16_t data_len; + struct pbuf *p = inp; +#if LWIP_HTTPD_SUPPORT_REQUESTLIST + u16_t clen; +#endif /* LWIP_HTTPD_SUPPORT_REQUESTLIST */ +#if LWIP_HTTPD_SUPPORT_POST + err_t err; +#endif /* LWIP_HTTPD_SUPPORT_POST */ + + LWIP_UNUSED_ARG(pcb); /* only used for post */ + LWIP_ASSERT("p != NULL", p != NULL); + LWIP_ASSERT("hs != NULL", hs != NULL); + + if ((hs->handle != NULL) || (hs->file != NULL)) { + LWIP_DEBUGF(HTTPD_DEBUG, ("Received data while sending a file\n")); + /* already sending a file */ + /* @todo: abort? */ + return ERR_USE; + } + +#if LWIP_HTTPD_SUPPORT_REQUESTLIST + + LWIP_DEBUGF(HTTPD_DEBUG, ("Received %"U16_F" bytes\n", p->tot_len)); + + /* first check allowed characters in this pbuf? */ + + /* enqueue the pbuf */ + if (hs->req == NULL) { + LWIP_DEBUGF(HTTPD_DEBUG, ("First pbuf\n")); + hs->req = p; + } else { + LWIP_DEBUGF(HTTPD_DEBUG, ("pbuf enqueued\n")); + pbuf_cat(hs->req, p); + } + /* increase pbuf ref counter as it is freed when we return but we want to + keep it on the req list */ + pbuf_ref(p); + + if (hs->req->next != NULL) { + data_len = LWIP_MIN(hs->req->tot_len, LWIP_HTTPD_MAX_REQ_LENGTH); + pbuf_copy_partial(hs->req, httpd_req_buf, data_len, 0); + data = httpd_req_buf; + } else +#endif /* LWIP_HTTPD_SUPPORT_REQUESTLIST */ + { + data = (char *)p->payload; + data_len = p->len; + if (p->len != p->tot_len) { + LWIP_DEBUGF(HTTPD_DEBUG, ("Warning: incomplete header due to chained pbufs\n")); + } + } + + /* received enough data for minimal request? */ + if (data_len >= MIN_REQ_LEN) { + /* wait for CRLF before parsing anything */ + crlf = strnstr(data, CRLF, data_len); + if (crlf != NULL) { +#if LWIP_HTTPD_SUPPORT_POST + int is_post = 0; +#endif /* LWIP_HTTPD_SUPPORT_POST */ + int is_09 = 0; + char *sp1, *sp2; + u16_t left_len, uri_len; + LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("CRLF received, parsing request\n")); + /* parse method */ + if (!strncmp(data, "GET ", 4)) { + sp1 = data + 3; + /* received GET request */ + LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("Received GET request\"\n")); +#if LWIP_HTTPD_SUPPORT_POST + } else if (!strncmp(data, "POST ", 5)) { + /* store request type */ + is_post = 1; + sp1 = data + 4; + /* received GET request */ + LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("Received POST request\n")); +#endif /* LWIP_HTTPD_SUPPORT_POST */ + } else { + /* null-terminate the METHOD (pbuf is freed anyway wen returning) */ + data[4] = 0; + /* unsupported method! */ + LWIP_DEBUGF(HTTPD_DEBUG, ("Unsupported request method (not implemented): \"%s\"\n", + data)); + return http_find_error_file(hs, 501); + } + /* if we come here, method is OK, parse URI */ + left_len = (u16_t)(data_len - ((sp1 +1) - data)); + sp2 = strnstr(sp1 + 1, " ", left_len); +#if LWIP_HTTPD_SUPPORT_V09 + if (sp2 == NULL) { + /* HTTP 0.9: respond with correct protocol version */ + sp2 = strnstr(sp1 + 1, CRLF, left_len); + is_09 = 1; +#if LWIP_HTTPD_SUPPORT_POST + if (is_post) { + /* HTTP/0.9 does not support POST */ + goto badrequest; + } +#endif /* LWIP_HTTPD_SUPPORT_POST */ + } +#endif /* LWIP_HTTPD_SUPPORT_V09 */ + uri_len = (u16_t)(sp2 - (sp1 + 1)); + if ((sp2 != 0) && (sp2 > sp1)) { + /* wait for CRLFCRLF (indicating end of HTTP headers) before parsing anything */ + if (strnstr(data, CRLF CRLF, data_len) != NULL) { + char *uri = sp1 + 1; +#if LWIP_HTTPD_SUPPORT_11_KEEPALIVE + if (!is_09 && strnstr(data, HTTP11_CONNECTIONKEEPALIVE, data_len)) { + hs->keepalive = 1; + } else { + hs->keepalive = 0; + } +#endif /* LWIP_HTTPD_SUPPORT_11_KEEPALIVE */ + /* null-terminate the METHOD (pbuf is freed anyway wen returning) */ + *sp1 = 0; + uri[uri_len] = 0; + LWIP_DEBUGF(HTTPD_DEBUG, ("Received \"%s\" request for URI: \"%s\"\n", + data, uri)); +#if LWIP_HTTPD_SUPPORT_POST + if (is_post) { +#if LWIP_HTTPD_SUPPORT_REQUESTLIST + struct pbuf *q = hs->req; +#else /* LWIP_HTTPD_SUPPORT_REQUESTLIST */ + struct pbuf *q = inp; +#endif /* LWIP_HTTPD_SUPPORT_REQUESTLIST */ + err = http_post_request(q, hs, data, data_len, uri, sp2); + if (err != ERR_OK) { + /* restore header for next try */ + *sp1 = ' '; + *sp2 = ' '; + uri[uri_len] = ' '; + } + if (err == ERR_ARG) { + goto badrequest; + } + return err; + } else +#endif /* LWIP_HTTPD_SUPPORT_POST */ + { + return http_find_file(hs, uri, is_09); + } + } + } else { + LWIP_DEBUGF(HTTPD_DEBUG, ("invalid URI\n")); + } + } + } + +#if LWIP_HTTPD_SUPPORT_REQUESTLIST + clen = pbuf_clen(hs->req); + if ((hs->req->tot_len <= LWIP_HTTPD_REQ_BUFSIZE) && + (clen <= LWIP_HTTPD_REQ_QUEUELEN)) { + /* request not fully received (too short or CRLF is missing) */ + return ERR_INPROGRESS; + } else +#endif /* LWIP_HTTPD_SUPPORT_REQUESTLIST */ + { +#if LWIP_HTTPD_SUPPORT_POST +badrequest: +#endif /* LWIP_HTTPD_SUPPORT_POST */ + LWIP_DEBUGF(HTTPD_DEBUG, ("bad request\n")); + /* could not parse request */ + return http_find_error_file(hs, 400); + } +} + +/** Try to find the file specified by uri and, if found, initialize hs + * accordingly. + * + * @param hs the connection state + * @param uri the HTTP header URI + * @param is_09 1 if the request is HTTP/0.9 (no HTTP headers in response) + * @return ERR_OK if file was found and hs has been initialized correctly + * another err_t otherwise + */ +static err_t +http_find_file(struct http_state *hs, const char *uri, int is_09) +{ + size_t loop; + struct fs_file *file = NULL; + char *params; + err_t err; +#if LWIP_HTTPD_CGI + int i; + int count; +#endif /* LWIP_HTTPD_CGI */ +#if !LWIP_HTTPD_SSI + const +#endif /* !LWIP_HTTPD_SSI */ + /* By default, assume we will not be processing server-side-includes tags */ + u8_t tag_check = 0; + + /* Have we been asked for the default root file? */ + if((uri[0] == '/') && (uri[1] == 0)) { + /* Try each of the configured default filenames until we find one + that exists. */ + for (loop = 0; loop < NUM_DEFAULT_FILENAMES; loop++) { + LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("Looking for %s...\n", g_psDefaultFilenames[loop].name)); + err = fs_open(&hs->file_handle, g_psDefaultFilenames[loop].name); + uri = g_psDefaultFilenames[loop].name; + if(err == ERR_OK) { + file = &hs->file_handle; + LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("Opened.\n")); +#if LWIP_HTTPD_SSI + tag_check = g_psDefaultFilenames[loop].shtml; +#endif /* LWIP_HTTPD_SSI */ + break; + } + } + if (file == NULL) { + /* None of the default filenames exist so send back a 404 page */ + file = http_get_404_file(hs, &uri); +#if LWIP_HTTPD_SSI + tag_check = 0; +#endif /* LWIP_HTTPD_SSI */ + } + } else { + /* No - we've been asked for a specific file. */ + /* First, isolate the base URI (without any parameters) */ + params = (char *)strchr(uri, '?'); + if (params != NULL) { + /* URI contains parameters. NULL-terminate the base URI */ + *params = '\0'; + params++; + } + +#if LWIP_HTTPD_CGI + /* Does the base URI we have isolated correspond to a CGI handler? */ + if (g_iNumCGIs && g_pCGIs) { + for (i = 0; i < g_iNumCGIs; i++) { + if (strcmp(uri, g_pCGIs[i].pcCGIName) == 0) { + /* + * We found a CGI that handles this URI so extract the + * parameters and call the handler. + */ + count = extract_uri_parameters(hs, params); + uri = g_pCGIs[i].pfnCGIHandler(i, count, hs->params, + hs->param_vals); + break; + } + } + } +#endif /* LWIP_HTTPD_CGI */ + + LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("Opening %s\n", uri)); + + err = fs_open(&hs->file_handle, uri); + if (err == ERR_OK) { + file = &hs->file_handle; + } else { + file = http_get_404_file(hs, &uri); + } +#if LWIP_HTTPD_SSI + if (file != NULL) { + /* See if we have been asked for an shtml file and, if so, + enable tag checking. */ + tag_check = 0; + for (loop = 0; loop < NUM_SHTML_EXTENSIONS; loop++) { + if (strstr(uri, g_pcSSIExtensions[loop])) { + tag_check = 1; + break; + } + } + } +#endif /* LWIP_HTTPD_SSI */ + } + return http_init_file(hs, file, is_09, uri, tag_check); +} + +/** Initialize a http connection with a file to send (if found). + * Called by http_find_file and http_find_error_file. + * + * @param hs http connection state + * @param file file structure to send (or NULL if not found) + * @param is_09 1 if the request is HTTP/0.9 (no HTTP headers in response) + * @param uri the HTTP header URI + * @param tag_check enable SSI tag checking + * @return ERR_OK if file was found and hs has been initialized correctly + * another err_t otherwise + */ +static err_t +http_init_file(struct http_state *hs, struct fs_file *file, int is_09, const char *uri, u8_t tag_check) +{ + if (file != NULL) { + /* file opened, initialise struct http_state */ +#if LWIP_HTTPD_SSI + if (tag_check) { + struct http_ssi_state *ssi = http_ssi_state_alloc(); + if (ssi != NULL) { + ssi->tag_index = 0; + ssi->tag_state = TAG_NONE; + ssi->parsed = file->data; + ssi->parse_left = file->len; + ssi->tag_end = file->data; + hs->ssi = ssi; + } + } +#else /* LWIP_HTTPD_SSI */ + LWIP_UNUSED_ARG(tag_check); +#endif /* LWIP_HTTPD_SSI */ + hs->handle = file; + hs->file = file->data; + LWIP_ASSERT("File length must be positive!", (file->len >= 0)); + hs->left = file->len; + hs->retries = 0; +#if LWIP_HTTPD_TIMING + hs->time_started = sys_now(); +#endif /* LWIP_HTTPD_TIMING */ +#if !LWIP_HTTPD_DYNAMIC_HEADERS + LWIP_ASSERT("HTTP headers not included in file system", hs->handle->http_header_included); +#endif /* !LWIP_HTTPD_DYNAMIC_HEADERS */ +#if LWIP_HTTPD_SUPPORT_V09 + if (hs->handle->http_header_included && is_09) { + /* HTTP/0.9 responses are sent without HTTP header, + search for the end of the header. */ + const char *file_start = strnstr(hs->file, CRLF CRLF, hs->left); + if (file_start != NULL) { + size_t diff = file_start + 4 - hs->file; + hs->file += diff; + hs->left -= (u32_t)diff; + } + } +#endif /* LWIP_HTTPD_SUPPORT_V09*/ + } else { + hs->handle = NULL; + hs->file = NULL; + hs->left = 0; + hs->retries = 0; + } +#if LWIP_HTTPD_DYNAMIC_HEADERS + /* Determine the HTTP headers to send based on the file extension of + * the requested URI. */ + if ((hs->handle == NULL) || !hs->handle->http_header_included) { + get_http_headers(hs, (char*)uri); + } +#else /* LWIP_HTTPD_DYNAMIC_HEADERS */ + LWIP_UNUSED_ARG(uri); +#endif /* LWIP_HTTPD_DYNAMIC_HEADERS */ + return ERR_OK; +} + +/** + * The pcb had an error and is already deallocated. + * The argument might still be valid (if != NULL). + */ +static void +http_err(void *arg, err_t err) +{ + struct http_state *hs = (struct http_state *)arg; + LWIP_UNUSED_ARG(err); + + LWIP_DEBUGF(HTTPD_DEBUG, ("http_err: %s", lwip_strerr(err))); + + if (hs != NULL) { + http_state_free(hs); + } +} + +/** + * Data has been sent and acknowledged by the remote host. + * This means that more data can be sent. + */ +static err_t +http_sent(void *arg, struct tcp_pcb *pcb, u16_t len) +{ + struct http_state *hs = (struct http_state *)arg; + + LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("http_sent %p\n", (void*)pcb)); + + LWIP_UNUSED_ARG(len); + + if (hs == NULL) { + return ERR_OK; + } + + hs->retries = 0; + + http_send(pcb, hs); + + return ERR_OK; +} + +/** + * The poll function is called every 2nd second. + * If there has been no data sent (which resets the retries) in 8 seconds, close. + * If the last portion of a file has not been sent in 2 seconds, close. + * + * This could be increased, but we don't want to waste resources for bad connections. + */ +static err_t +http_poll(void *arg, struct tcp_pcb *pcb) +{ + struct http_state *hs = (struct http_state *)arg; + LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("http_poll: pcb=%p hs=%p pcb_state=%s\n", + (void*)pcb, (void*)hs, tcp_debug_state_str(pcb->state))); + + if (hs == NULL) { + err_t closed; + /* arg is null, close. */ + LWIP_DEBUGF(HTTPD_DEBUG, ("http_poll: arg is NULL, close\n")); + closed = http_close_conn(pcb, NULL); + LWIP_UNUSED_ARG(closed); +#if LWIP_HTTPD_ABORT_ON_CLOSE_MEM_ERROR + if (closed == ERR_MEM) { + tcp_abort(pcb); + return ERR_ABRT; + } +#endif /* LWIP_HTTPD_ABORT_ON_CLOSE_MEM_ERROR */ + return ERR_OK; + } else { + hs->retries++; + if (hs->retries == HTTPD_MAX_RETRIES) { + LWIP_DEBUGF(HTTPD_DEBUG, ("http_poll: too many retries, close\n")); + http_close_conn(pcb, hs); + return ERR_OK; + } + + /* If this connection has a file open, try to send some more data. If + * it has not yet received a GET request, don't do this since it will + * cause the connection to close immediately. */ + if(hs && (hs->handle)) { + LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("http_poll: try to send more data\n")); + if(http_send(pcb, hs)) { + /* If we wrote anything to be sent, go ahead and send it now. */ + LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("tcp_output\n")); + tcp_output(pcb); + } + } + } + + return ERR_OK; +} + +/** + * Data has been received on this pcb. + * For HTTP 1.0, this should normally only happen once (if the request fits in one packet). + */ +static err_t +http_recv(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err) +{ + struct http_state *hs = (struct http_state *)arg; + LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("http_recv: pcb=%p pbuf=%p err=%s\n", (void*)pcb, + (void*)p, lwip_strerr(err))); + + if ((err != ERR_OK) || (p == NULL) || (hs == NULL)) { + /* error or closed by other side? */ + if (p != NULL) { + /* Inform TCP that we have taken the data. */ + tcp_recved(pcb, p->tot_len); + pbuf_free(p); + } + if (hs == NULL) { + /* this should not happen, only to be robust */ + LWIP_DEBUGF(HTTPD_DEBUG, ("Error, http_recv: hs is NULL, close\n")); + } + http_close_conn(pcb, hs); + return ERR_OK; + } + +#if LWIP_HTTPD_SUPPORT_POST && LWIP_HTTPD_POST_MANUAL_WND + if (hs->no_auto_wnd) { + hs->unrecved_bytes += p->tot_len; + } else +#endif /* LWIP_HTTPD_SUPPORT_POST && LWIP_HTTPD_POST_MANUAL_WND */ + { + /* Inform TCP that we have taken the data. */ + tcp_recved(pcb, p->tot_len); + } + +#if LWIP_HTTPD_SUPPORT_POST + if (hs->post_content_len_left > 0) { + /* reset idle counter when POST data is received */ + hs->retries = 0; + /* this is data for a POST, pass the complete pbuf to the application */ + http_post_rxpbuf(hs, p); + /* pbuf is passed to the application, don't free it! */ + if (hs->post_content_len_left == 0) { + /* all data received, send response or close connection */ + http_send(pcb, hs); + } + return ERR_OK; + } else +#endif /* LWIP_HTTPD_SUPPORT_POST */ + { + if (hs->handle == NULL) { + err_t parsed = http_parse_request(p, hs, pcb); + LWIP_ASSERT("http_parse_request: unexpected return value", parsed == ERR_OK + || parsed == ERR_INPROGRESS ||parsed == ERR_ARG || parsed == ERR_USE); +#if LWIP_HTTPD_SUPPORT_REQUESTLIST + if (parsed != ERR_INPROGRESS) { + /* request fully parsed or error */ + if (hs->req != NULL) { + pbuf_free(hs->req); + hs->req = NULL; + } + } +#endif /* LWIP_HTTPD_SUPPORT_REQUESTLIST */ + pbuf_free(p); + if (parsed == ERR_OK) { +#if LWIP_HTTPD_SUPPORT_POST + if (hs->post_content_len_left == 0) +#endif /* LWIP_HTTPD_SUPPORT_POST */ + { + LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("http_recv: data %p len %"S32_F"\n", hs->file, hs->left)); + http_send(pcb, hs); + } + } else if (parsed == ERR_ARG) { + /* @todo: close on ERR_USE? */ + http_close_conn(pcb, hs); + } + } else { + LWIP_DEBUGF(HTTPD_DEBUG, ("http_recv: already sending data\n")); + /* already sending but still receiving data, we might want to RST here? */ + pbuf_free(p); + } + } + return ERR_OK; +} + +/** + * A new incoming connection has been accepted. + */ +static err_t +http_accept(void *arg, struct tcp_pcb *pcb, err_t err) +{ + struct http_state *hs; + struct tcp_pcb_listen *lpcb = (struct tcp_pcb_listen*)arg; + LWIP_UNUSED_ARG(err); + LWIP_DEBUGF(HTTPD_DEBUG, ("http_accept %p / %p\n", (void*)pcb, arg)); + + /* Decrease the listen backlog counter */ + tcp_accepted(lpcb); + /* Set priority */ + tcp_setprio(pcb, HTTPD_TCP_PRIO); + + /* Allocate memory for the structure that holds the state of the + connection - initialized by that function. */ + hs = http_state_alloc(); + if (hs == NULL) { + LWIP_DEBUGF(HTTPD_DEBUG, ("http_accept: Out of memory, RST\n")); + return ERR_MEM; + } + hs->pcb = pcb; + + /* Tell TCP that this is the structure we wish to be passed for our + callbacks. */ + tcp_arg(pcb, hs); + + /* Set up the various callback functions */ + tcp_recv(pcb, http_recv); + tcp_err(pcb, http_err); + tcp_poll(pcb, http_poll, HTTPD_POLL_INTERVAL); + tcp_sent(pcb, http_sent); + + return ERR_OK; +} + +/** + * Initialize the httpd with the specified local address. + */ +static void +httpd_init_addr(const ip_addr_t *local_addr) +{ + struct tcp_pcb *pcb; + err_t err; + + pcb = tcp_new(); + LWIP_ASSERT("httpd_init: tcp_new failed", pcb != NULL); + tcp_setprio(pcb, HTTPD_TCP_PRIO); + /* set SOF_REUSEADDR here to explicitly bind httpd to multiple interfaces */ + err = tcp_bind(pcb, local_addr, HTTPD_SERVER_PORT); + LWIP_ASSERT("httpd_init: tcp_bind failed", err == ERR_OK); + pcb = tcp_listen_dual(pcb); + LWIP_ASSERT("httpd_init: tcp_listen failed", pcb != NULL); + /* initialize callback arg and accept callback */ + tcp_arg(pcb, pcb); + tcp_accept(pcb, http_accept); +} + +/** + * Initialize the httpd: set up a listening PCB and bind it to the defined port + */ +void +httpd_init(void) +{ + LWIP_DEBUGF(HTTPD_DEBUG, ("httpd_init\n")); + +#if HTTPD_USE_MEM_POOL + LWIP_MEMPOOL_INIT(HTTPD_STATE); +#if LWIP_HTTPD_SSI + LWIP_MEMPOOL_INIT(HTTPD_SSI_STATE); +#endif /* LWIP_HTTPD_SSI */ +#endif /* HTTPD_USE_MEM_POOL */ + + httpd_init_addr(IP_ADDR_ANY); +} + +#if LWIP_HTTPD_SSI +/** + * Set the SSI handler function. + * + * @param ssi_handler the SSI handler function + * @param tags an array of SSI tag strings to search for in SSI-enabled files + * @param num_tags number of tags in the 'tags' array + */ +void +http_set_ssi_handler(tSSIHandler ssi_handler, const char **tags, int num_tags) +{ + LWIP_DEBUGF(HTTPD_DEBUG, ("http_set_ssi_handler\n")); + + LWIP_ASSERT("no ssi_handler given", ssi_handler != NULL); + LWIP_ASSERT("no tags given", tags != NULL); + LWIP_ASSERT("invalid number of tags", num_tags > 0); + + g_pfnSSIHandler = ssi_handler; + g_ppcTags = tags; + g_iNumTags = num_tags; +} +#endif /* LWIP_HTTPD_SSI */ + +#if LWIP_HTTPD_CGI +/** + * Set an array of CGI filenames/handler functions + * + * @param cgis an array of CGI filenames/handler functions + * @param num_handlers number of elements in the 'cgis' array + */ +void +http_set_cgi_handlers(const tCGI *cgis, int num_handlers) +{ + LWIP_ASSERT("no cgis given", cgis != NULL); + LWIP_ASSERT("invalid number of handlers", num_handlers > 0); + + g_pCGIs = cgis; + g_iNumCGIs = num_handlers; +} +#endif /* LWIP_HTTPD_CGI */ + +#endif /* LWIP_TCP */ diff --git a/src/apps/httpd/httpd_structs.h b/src/apps/httpd/httpd_structs.h new file mode 100644 index 00000000..0c373032 --- /dev/null +++ b/src/apps/httpd/httpd_structs.h @@ -0,0 +1,104 @@ +#ifndef LWIP_HTTPD_STRUCTS_H +#define LWIP_HTTPD_STRUCTS_H + +#include "lwip/apps/httpd.h" + +#if LWIP_HTTPD_DYNAMIC_HEADERS +/** This struct is used for a list of HTTP header strings for various + * filename extensions. */ +typedef struct +{ + const char *extension; + const char *content_type; +} tHTTPHeader; + +/** A list of strings used in HTTP headers (see RFC 1945 HTTP/1.0 and + * RFC 2616 HTTP/1.1 for header field definitions) */ +static const char * const g_psHTTPHeaderStrings[] = +{ + "HTTP/1.0 200 OK\r\n", + "HTTP/1.0 404 File not found\r\n", + "HTTP/1.0 400 Bad Request\r\n", + "HTTP/1.0 501 Not Implemented\r\n", + "HTTP/1.1 200 OK\r\n", + "HTTP/1.1 404 File not found\r\n", + "HTTP/1.1 400 Bad Request\r\n", + "HTTP/1.1 501 Not Implemented\r\n", + "Content-Length: ", + "Connection: Close\r\n", + "Connection: keep-alive\r\n", + "Server: "HTTPD_SERVER_AGENT"\r\n", + "\r\n

404: The requested file cannot be found.

\r\n" +}; + +/* Indexes into the g_psHTTPHeaderStrings array */ +#define HTTP_HDR_OK 0 /* 200 OK */ +#define HTTP_HDR_NOT_FOUND 1 /* 404 File not found */ +#define HTTP_HDR_BAD_REQUEST 2 /* 400 Bad request */ +#define HTTP_HDR_NOT_IMPL 3 /* 501 Not Implemented */ +#define HTTP_HDR_OK_11 4 /* 200 OK */ +#define HTTP_HDR_NOT_FOUND_11 5 /* 404 File not found */ +#define HTTP_HDR_BAD_REQUEST_11 6 /* 400 Bad request */ +#define HTTP_HDR_NOT_IMPL_11 7 /* 501 Not Implemented */ +#define HTTP_HDR_CONTENT_LENGTH 8 /* Content-Length: (HTTP 1.1)*/ +#define HTTP_HDR_CONN_CLOSE 9 /* Connection: Close (HTTP 1.1) */ +#define HTTP_HDR_CONN_KEEPALIVE 10 /* Connection: keep-alive (HTTP 1.1) */ +#define HTTP_HDR_SERVER 11 /* Server: HTTPD_SERVER_AGENT */ +#define DEFAULT_404_HTML 12 /* default 404 body */ + + +#define HTTP_HDR_HTML "Content-type: text/html\r\n\r\n" +#define HTTP_HDR_SSI "Content-type: text/html\r\nExpires: Fri, 10 Apr 2008 14:00:00 GMT\r\nPragma: no-cache\r\n\r\n" +#define HTTP_HDR_GIF "Content-type: image/gif\r\n\r\n" +#define HTTP_HDR_PNG "Content-type: image/png\r\n\r\n" +#define HTTP_HDR_JPG "Content-type: image/jpeg\r\n\r\n" +#define HTTP_HDR_BMP "Content-type: image/bmp\r\n\r\n" +#define HTTP_HDR_ICO "Content-type: image/x-icon\r\n\r\n" +#define HTTP_HDR_APP "Content-type: application/octet-stream\r\n\r\n" +#define HTTP_HDR_JS "Content-type: application/javascript\r\n\r\n" +#define HTTP_HDR_RA "Content-type: application/javascript\r\n\r\n" +#define HTTP_HDR_CSS "Content-type: text/css\r\n\r\n" +#define HTTP_HDR_SWF "Content-type: application/x-shockwave-flash\r\n\r\n" +#define HTTP_HDR_XML "Content-type: text/xml\r\n\r\n" +#define HTTP_HDR_PDF "Content-type: application/pdf\r\n\r\n" + +#define HTTP_HDR_DEFAULT_TYPE "Content-type: text/plain\r\n\r\n" + +/** A list of extension-to-HTTP header strings (see outdated RFC 1700 MEDIA TYPES + * and http://www.iana.org/assignments/media-types for registered content types + * and subtypes) */ +static const tHTTPHeader g_psHTTPHeaders[] = +{ + { "html", HTTP_HDR_HTML}, + { "htm", HTTP_HDR_HTML}, + { "shtml",HTTP_HDR_SSI}, + { "shtm", HTTP_HDR_SSI}, + { "ssi", HTTP_HDR_SSI}, + { "gif", HTTP_HDR_GIF}, + { "png", HTTP_HDR_PNG}, + { "jpg", HTTP_HDR_JPG}, + { "bmp", HTTP_HDR_BMP}, + { "ico", HTTP_HDR_ICO}, + { "class",HTTP_HDR_APP}, + { "cls", HTTP_HDR_APP}, + { "js", HTTP_HDR_JS}, + { "ram", HTTP_HDR_RA}, + { "css", HTTP_HDR_CSS}, + { "swf", HTTP_HDR_SWF}, + { "xml", HTTP_HDR_XML}, + { "xsl", HTTP_HDR_XML}, + { "pdf", HTTP_HDR_PDF} +}; + +#define NUM_HTTP_HEADERS (sizeof(g_psHTTPHeaders) / sizeof(tHTTPHeader)) + +#endif /* LWIP_HTTPD_DYNAMIC_HEADERS */ + +#if LWIP_HTTPD_SSI +static const char * const g_pcSSIExtensions[] = { + ".shtml", ".shtm", ".ssi", ".xml" +}; +#define NUM_SHTML_EXTENSIONS (sizeof(g_pcSSIExtensions) / sizeof(const char *)) +#endif /* LWIP_HTTPD_SSI */ + +#endif /* LWIP_HTTPD_STRUCTS_H */ diff --git a/src/apps/httpd/makefsdata/makefsdata b/src/apps/httpd/makefsdata/makefsdata new file mode 100644 index 00000000..37b4203e --- /dev/null +++ b/src/apps/httpd/makefsdata/makefsdata @@ -0,0 +1,97 @@ +#!/usr/bin/perl + +open(OUTPUT, "> fsdata.c"); + +chdir("fs"); +open(FILES, "find . -type f |"); + +while($file = ) { + + # Do not include files in CVS directories nor backup files. + if($file =~ /(CVS|~)/) { + next; + } + + chop($file); + + open(HEADER, "> /tmp/header") || die $!; + if($file =~ /404/) { + print(HEADER "HTTP/1.0 404 File not found\r\n"); + } else { + print(HEADER "HTTP/1.0 200 OK\r\n"); + } + print(HEADER "Server: lwIP/pre-0.6 (http://www.sics.se/~adam/lwip/)\r\n"); + if($file =~ /\.html$/) { + print(HEADER "Content-type: text/html\r\n"); + } elsif($file =~ /\.gif$/) { + print(HEADER "Content-type: image/gif\r\n"); + } elsif($file =~ /\.png$/) { + print(HEADER "Content-type: image/png\r\n"); + } elsif($file =~ /\.jpg$/) { + print(HEADER "Content-type: image/jpeg\r\n"); + } elsif($file =~ /\.class$/) { + print(HEADER "Content-type: application/octet-stream\r\n"); + } elsif($file =~ /\.ram$/) { + print(HEADER "Content-type: audio/x-pn-realaudio\r\n"); + } else { + print(HEADER "Content-type: text/plain\r\n"); + } + print(HEADER "\r\n"); + close(HEADER); + + unless($file =~ /\.plain$/ || $file =~ /cgi/) { + system("cat /tmp/header $file > /tmp/file"); + } else { + system("cp $file /tmp/file"); + } + + open(FILE, "/tmp/file"); + unlink("/tmp/file"); + unlink("/tmp/header"); + + $file =~ s/\.//; + $fvar = $file; + $fvar =~ s-/-_-g; + $fvar =~ s-\.-_-g; + print(OUTPUT "static const unsigned char data".$fvar."[] = {\n"); + print(OUTPUT "\t/* $file */\n\t"); + for($j = 0; $j < length($file); $j++) { + printf(OUTPUT "%#02x, ", unpack("C", substr($file, $j, 1))); + } + printf(OUTPUT "0,\n"); + + + $i = 0; + while(read(FILE, $data, 1)) { + if($i == 0) { + print(OUTPUT "\t"); + } + printf(OUTPUT "%#02x, ", unpack("C", $data)); + $i++; + if($i == 10) { + print(OUTPUT "\n"); + $i = 0; + } + } + print(OUTPUT "};\n\n"); + close(FILE); + push(@fvars, $fvar); + push(@files, $file); +} + +for($i = 0; $i < @fvars; $i++) { + $file = $files[$i]; + $fvar = $fvars[$i]; + + if($i == 0) { + $prevfile = "NULL"; + } else { + $prevfile = "file" . $fvars[$i - 1]; + } + print(OUTPUT "const struct fsdata_file file".$fvar."[] = {{$prevfile, data$fvar, "); + print(OUTPUT "data$fvar + ". (length($file) + 1) .", "); + print(OUTPUT "sizeof(data$fvar) - ". (length($file) + 1) ."}};\n\n"); +} + +print(OUTPUT "#define FS_ROOT file$fvars[$i - 1]\n\n"); +print(OUTPUT "#define FS_NUMFILES $i\n"); diff --git a/src/apps/httpd/makefsdata/makefsdata.c b/src/apps/httpd/makefsdata/makefsdata.c new file mode 100644 index 00000000..383c50d1 --- /dev/null +++ b/src/apps/httpd/makefsdata/makefsdata.c @@ -0,0 +1,778 @@ +/** + * makefsdata: Converts a directory structure for use with the lwIP httpd. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Jim Pettinato + * Simon Goldschmidt + * + * @todo: + * - take TCP_MSS, LWIP_TCP_TIMESTAMPS and + * PAYLOAD_ALIGN_TYPE/PAYLOAD_ALIGNMENT as arguments + */ + +#include +#include +#ifdef WIN32 +#define WIN32_LEAN_AND_MEAN +#include "windows.h" +#else +#include +#endif +#include +#include + +/* Compatibility defines Win32 vs. DOS */ +#ifdef WIN32 + +#define FIND_T WIN32_FIND_DATAA +#define FIND_T_FILENAME(fInfo) (fInfo.cFileName) +#define FIND_T_IS_DIR(fInfo) ((fInfo.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) != 0) +#define FIND_T_IS_FILE(fInfo) ((fInfo.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) == 0) +#define FIND_RET_T HANDLE +#define FINDFIRST_FILE(path, result) FindFirstFileA(path, result) +#define FINDFIRST_DIR(path, result) FindFirstFileA(path, result) +#define FINDNEXT(ff_res, result) FindNextFileA(ff_res, result) +#define FINDFIRST_SUCCEEDED(ret) (ret != INVALID_HANDLE_VALUE) +#define FINDNEXT_SUCCEEDED(ret) (ret == TRUE) + +#define GETCWD(path, len) GetCurrentDirectoryA(len, path) +#define CHDIR(path) SetCurrentDirectoryA(path) +#define CHDIR_SUCCEEDED(ret) (ret == TRUE) + +#else + +#define FIND_T struct ffblk +#define FIND_T_FILENAME(fInfo) (fInfo.ff_name) +#define FIND_T_IS_DIR(fInfo) ((fInfo.ff_attrib & FA_DIREC) == FA_DIREC) +#define FIND_T_IS_FILE(fInfo) (1) +#define FIND_RET_T int +#define FINDFIRST_FILE(path, result) findfirst(path, result, FA_ARCH) +#define FINDFIRST_DIR(path, result) findfirst(path, result, FA_DIREC) +#define FINDNEXT(ff_res, result) FindNextFileA(ff_res, result) +#define FINDFIRST_SUCCEEDED(ret) (ret == 0) +#define FINDNEXT_SUCCEEDED(ret) (ret == 0) + +#define GETCWD(path, len) getcwd(path, len) +#define CHDIR(path) chdir(path) +#define CHDIR_SUCCEEDED(ret) (ret == 0) + +#endif + +#define NEWLINE "\r\n" +#define NEWLINE_LEN 2 + +/* define this to get the header variables we use to build HTTP headers */ +#define LWIP_HTTPD_DYNAMIC_HEADERS 1 +#define LWIP_HTTPD_SSI 1 +#include "../httpd_structs.h" + +#include "../core/inet_chksum.c" +#include "../core/def.c" + +/** (Your server name here) */ +const char *serverID = "Server: "HTTPD_SERVER_AGENT"\r\n"; + +/* change this to suit your MEM_ALIGNMENT */ +#define PAYLOAD_ALIGNMENT 4 +/* set this to 0 to prevent aligning payload */ +#define ALIGN_PAYLOAD 1 +/* define this to a type that has the required alignment */ +#define PAYLOAD_ALIGN_TYPE "unsigned int" +static int payload_alingment_dummy_counter = 0; + +#define HEX_BYTES_PER_LINE 16 + +#define MAX_PATH_LEN 256 + +#define COPY_BUFSIZE 10240 + +struct file_entry +{ + struct file_entry* next; + const char* filename_c; +}; + +int process_sub(FILE *data_file, FILE *struct_file); +int process_file(FILE *data_file, FILE *struct_file, const char *filename); +int file_write_http_header(FILE *data_file, const char *filename, int file_size, + u16_t *http_hdr_len, u16_t *http_hdr_chksum); +int file_put_ascii(FILE *file, const char *ascii_string, int len, int *i); +int s_put_ascii(char *buf, const char *ascii_string, int len, int *i); +void concat_files(const char *file1, const char *file2, const char *targetfile); +int check_path(char* path, size_t size); + +static unsigned char file_buffer_raw[COPY_BUFSIZE]; +/* 5 bytes per char + 3 bytes per line */ +static char file_buffer_c[COPY_BUFSIZE * 5 + ((COPY_BUFSIZE / HEX_BYTES_PER_LINE) * 3)]; + +char curSubdir[MAX_PATH_LEN]; +char lastFileVar[MAX_PATH_LEN]; +char hdr_buf[4096]; + +unsigned char processSubs = 1; +unsigned char includeHttpHeader = 1; +unsigned char useHttp11 = 0; +unsigned char supportSsi = 1; +unsigned char precalcChksum = 0; + +struct file_entry* first_file = NULL; +struct file_entry* last_file = NULL; + +static void print_usage(void) +{ + printf(" Usage: htmlgen [targetdir] [-s] [-i] [-f:]" NEWLINE NEWLINE); + printf(" targetdir: relative or absolute path to files to convert" NEWLINE); + printf(" switch -s: toggle processing of subdirectories (default is on)" NEWLINE); + printf(" switch -e: exclude HTTP header from file (header is created at runtime, default is off)" NEWLINE); + printf(" switch -11: include HTTP 1.1 header (1.0 is default)" NEWLINE); + printf(" switch -nossi: no support for SSI (cannot calculate Content-Length for SSI)" NEWLINE); + printf(" switch -c: precalculate checksums for all pages (default is off)" NEWLINE); + printf(" switch -f: target filename (default is \"fsdata.c\")" NEWLINE); + printf(" if targetdir not specified, htmlgen will attempt to" NEWLINE); + printf(" process files in subdirectory 'fs'" NEWLINE); +} + +int main(int argc, char *argv[]) +{ + char path[MAX_PATH_LEN]; + char appPath[MAX_PATH_LEN]; + FILE *data_file; + FILE *struct_file; + int filesProcessed; + int i; + char targetfile[MAX_PATH_LEN]; + strcpy(targetfile, "fsdata.c"); + + memset(path, 0, sizeof(path)); + memset(appPath, 0, sizeof(appPath)); + + printf(NEWLINE " makefsdata - HTML to C source converter" NEWLINE); + printf(" by Jim Pettinato - circa 2003 " NEWLINE); + printf(" extended by Simon Goldschmidt - 2009 " NEWLINE NEWLINE); + + strcpy(path, "fs"); + for(i = 1; i < argc; i++) { + if (argv[i] == NULL) { + continue; + } + if (argv[i][0] == '-') { + if (strstr(argv[i], "-s")) { + processSubs = 0; + } else if (strstr(argv[i], "-e")) { + includeHttpHeader = 0; + } else if (strstr(argv[i], "-11")) { + useHttp11 = 1; + } else if (strstr(argv[i], "-nossi")) { + supportSsi = 0; + } else if (strstr(argv[i], "-c")) { + precalcChksum = 1; + } else if((argv[i][1] == 'f') && (argv[i][2] == ':')) { + strncpy(targetfile, &argv[i][3], sizeof(targetfile) - 1); + targetfile[sizeof(targetfile) - 1] = 0; + printf("Writing to file \"%s\"\n", targetfile); + } else if ((strstr(argv[i], "-?")) || (strstr(argv[i], "-h"))) { + print_usage(); + exit(0); + } + } else if ((argv[i][0] == '/') && (argv[i][1] == '?') && (argv[i][2] == 0)) { + print_usage(); + exit(0); + } else { + strncpy(path, argv[i], sizeof(path)-1); + path[sizeof(path)-1] = 0; + } + } + + if(!check_path(path, sizeof(path))) { + printf("Invalid path: \"%s\"." NEWLINE, path); + exit(-1); + } + + GETCWD(appPath, MAX_PATH_LEN); + /* if command line param or subdir named 'fs' not found spout usage verbiage */ + if (!CHDIR_SUCCEEDED(CHDIR(path))) { + /* if no subdir named 'fs' (or the one which was given) exists, spout usage verbiage */ + printf(" Failed to open directory \"%s\"." NEWLINE NEWLINE, path); + print_usage(); + exit(-1); + } + CHDIR(appPath); + + printf("HTTP %sheader will %s statically included." NEWLINE, + (includeHttpHeader ? (useHttp11 ? "1.1 " : "1.0 ") : ""), + (includeHttpHeader ? "be" : "not be")); + + sprintf(curSubdir, ""); /* start off in web page's root directory - relative paths */ + printf(" Processing all files in directory %s", path); + if (processSubs) { + printf(" and subdirectories..." NEWLINE NEWLINE); + } else { + printf("..." NEWLINE NEWLINE); + } + + data_file = fopen("fsdata.tmp", "wb"); + if (data_file == NULL) { + printf("Failed to create file \"fsdata.tmp\"\n"); + exit(-1); + } + struct_file = fopen("fshdr.tmp", "wb"); + if (struct_file == NULL) { + printf("Failed to create file \"fshdr.tmp\"\n"); + fclose(data_file); + exit(-1); + } + + CHDIR(path); + + fprintf(data_file, "#include \"fs.h\"" NEWLINE); + fprintf(data_file, "#include \"lwip/def.h\"" NEWLINE); + fprintf(data_file, "#include \"fsdata.h\"" NEWLINE NEWLINE NEWLINE); + + fprintf(data_file, "#define file_NULL (struct fsdata_file *) NULL" NEWLINE NEWLINE NEWLINE); + + sprintf(lastFileVar, "NULL"); + + filesProcessed = process_sub(data_file, struct_file); + + /* data_file now contains all of the raw data.. now append linked list of + * file header structs to allow embedded app to search for a file name */ + fprintf(data_file, NEWLINE NEWLINE); + fprintf(struct_file, "#define FS_ROOT file_%s" NEWLINE, lastFileVar); + fprintf(struct_file, "#define FS_NUMFILES %d" NEWLINE NEWLINE, filesProcessed); + + fclose(data_file); + fclose(struct_file); + + CHDIR(appPath); + /* append struct_file to data_file */ + printf(NEWLINE "Creating target file..." NEWLINE NEWLINE); + concat_files("fsdata.tmp", "fshdr.tmp", targetfile); + + /* if succeeded, delete the temporary files */ + if (remove("fsdata.tmp") != 0) { + printf("Warning: failed to delete fsdata.tmp\n"); + } + if (remove("fshdr.tmp") != 0) { + printf("Warning: failed to delete fshdr.tmp\n"); + } + + printf(NEWLINE "Processed %d files - done." NEWLINE NEWLINE, filesProcessed); + + while (first_file != NULL) { + struct file_entry* fe = first_file; + first_file = fe->next; + free(fe); + } + + return 0; +} + +int check_path(char* path, size_t size) +{ + size_t slen; + if (path[0] == 0) { + /* empty */ + return 0; + } + slen = strlen(path); + if (slen >= size) { + /* not NULL-terminated */ + return 0; + } + while ((slen > 0) && ((path[slen] == '\\') || (path[slen] == '/'))) { + /* path should not end with trailing backslash */ + path[slen] = 0; + slen--; + } + if (slen == 0) { + return 0; + } + return 1; +} + +static void copy_file(const char *filename_in, FILE *fout) +{ + FILE *fin; + size_t len; + fin = fopen(filename_in, "rb"); + if (fin == NULL) { + printf("Failed to open file \"%s\"\n", filename_in); + exit(-1); + } + + while((len = fread(file_buffer_raw, 1, COPY_BUFSIZE, fin)) > 0) + { + fwrite(file_buffer_raw, 1, len, fout); + } + fclose(fin); +} + +void concat_files(const char *file1, const char *file2, const char *targetfile) +{ + FILE *fout; + fout = fopen(targetfile, "wb"); + if (fout == NULL) { + printf("Failed to open file \"%s\"\n", targetfile); + exit(-1); + } + copy_file(file1, fout); + copy_file(file2, fout); + fclose(fout); +} + +int process_sub(FILE *data_file, FILE *struct_file) +{ + FIND_T fInfo; + FIND_RET_T fret; + int filesProcessed = 0; + + if (processSubs) { + /* process subs recursively */ + size_t sublen = strlen(curSubdir); + size_t freelen = sizeof(curSubdir) - sublen - 1; + LWIP_ASSERT("sublen < sizeof(curSubdir)", sublen < sizeof(curSubdir)); + fret = FINDFIRST_DIR("*", &fInfo); + if (FINDFIRST_SUCCEEDED(fret)) { + do { + const char *curName = FIND_T_FILENAME(fInfo); + if ((curName[0] == '.') || (strcmp(curName, "CVS") == 0)) { + continue; + } + if (!FIND_T_IS_DIR(fInfo)) { + continue; + } + if (freelen > 0) { + CHDIR(curName); + strncat(curSubdir, "/", freelen); + strncat(curSubdir, curName, freelen - 1); + curSubdir[sizeof(curSubdir) - 1] = 0; + printf(NEWLINE "processing subdirectory %s/..." NEWLINE, curSubdir); + filesProcessed += process_sub(data_file, struct_file); + CHDIR(".."); + curSubdir[sublen] = 0; + } else { + printf("WARNING: cannot process sub due to path length restrictions: \"%s/%s\"\n", curSubdir, curName); + } + } while (FINDNEXT_SUCCEEDED(FINDNEXT(fret, &fInfo))); + } + } + + fret = FINDFIRST_FILE("*.*", &fInfo); + if (FINDFIRST_SUCCEEDED(fret)) { + /* at least one file in directory */ + do { + if (FIND_T_IS_FILE(fInfo)) { + const char *curName = FIND_T_FILENAME(fInfo); + printf("processing %s/%s..." NEWLINE, curSubdir, curName); + if (process_file(data_file, struct_file, curName) < 0) { + printf(NEWLINE "Error... aborting" NEWLINE); + return -1; + } + filesProcessed++; + } + } while (FINDNEXT_SUCCEEDED(FINDNEXT(fret, &fInfo))); + } + return filesProcessed; +} + +int get_file_size(const char* filename) +{ + FILE *inFile; + int file_size = -1; + inFile = fopen(filename, "rb"); + if (inFile == NULL) { + printf("Failed to open file \"%s\"\n", filename); + exit(-1); + } + fseek(inFile, 0, SEEK_END); + file_size = ftell(inFile); + fclose(inFile); + return file_size; +} + +void process_file_data(const char *filename, FILE *data_file) +{ + FILE *source_file; + size_t len, written, i, src_off=0; + + source_file = fopen(filename, "rb"); + if (source_file == NULL) { + printf("Failed to open file \"%s\"\n", filename); + exit(-1); + } + + do { + size_t off = 0; + len = fread(file_buffer_raw, 1, COPY_BUFSIZE, source_file); + if (len > 0) { + for (i = 0; i < len; i++) { + sprintf(&file_buffer_c[off], "0x%02.2x,", file_buffer_raw[i]); + off += 5; + if ((++src_off % HEX_BYTES_PER_LINE) == 0) { + memcpy(&file_buffer_c[off], NEWLINE, NEWLINE_LEN); + off += NEWLINE_LEN; + } + } + written = fwrite(file_buffer_c, 1, off, data_file); + } + } while(len > 0); + fclose(source_file); +} + +int write_checksums(FILE *struct_file, const char *filename, const char *varname, + u16_t hdr_len, u16_t hdr_chksum) +{ + int chunk_size = TCP_MSS; + int offset; + size_t len; + int i = 0; + FILE *f; +#if LWIP_TCP_TIMESTAMPS + /* when timestamps are used, usable space is 12 bytes less per segment */ + chunk_size -= 12; +#endif + + fprintf(struct_file, "#if HTTPD_PRECALCULATED_CHECKSUM" NEWLINE); + fprintf(struct_file, "const struct fsdata_chksum chksums_%s[] = {" NEWLINE, varname); + + memset(file_buffer_raw, 0xab, sizeof(file_buffer_raw)); + f = fopen(filename, "rb"); + if (f == NULL) { + printf("Failed to open file \"%s\"\n", filename); + exit(-1); + } + if (hdr_len > 0) { + /* add checksum for HTTP header */ + fprintf(struct_file, "{%d, 0x%04x, %d}," NEWLINE, 0, hdr_chksum, hdr_len); + i++; + } + for (offset = hdr_len; ; offset += len) { + unsigned short chksum; + len = fread(file_buffer_raw, 1, chunk_size, f); + if (len == 0) { + break; + } + chksum = ~inet_chksum(file_buffer_raw, (u16_t)len); + /* add checksum for data */ + fprintf(struct_file, "{%d, 0x%04x, %d}," NEWLINE, offset, chksum, len); + i++; + } + fclose(f); + fprintf(struct_file, "};" NEWLINE); + fprintf(struct_file, "#endif /* HTTPD_PRECALCULATED_CHECKSUM */" NEWLINE); + return i; +} + +static int is_valid_char_for_c_var(char x) +{ + if (((x >= 'A') && (x <= 'Z')) || + ((x >= 'a') && (x <= 'z')) || + ((x >= '0') && (x <= '9')) || + (x == '_')) + { + return 1; + } + return 0; +} + +static void fix_filename_for_c(char* qualifiedName, size_t max_len) +{ + struct file_entry* f; + size_t len = strlen(qualifiedName); + char *new_name = malloc(len + 2); + int filename_ok; + int cnt = 0; + size_t i; + if (len + 3 == max_len) { + printf("File name too long: \"%s\"\n", qualifiedName); + exit(-1); + } + strcpy(new_name, qualifiedName); + for (i = 0; i < len; i++) { + if (!is_valid_char_for_c_var(new_name[i])) { + new_name[i] = '_'; + } + } + do { + filename_ok = 1; + for (f = first_file; f != NULL; f = f->next) { + if (!strcmp(f->filename_c, new_name)) { + filename_ok = 0; + cnt++; + // try next unique file name + sprintf(&new_name[len], "%d", cnt); + break; + } + } + } while (!filename_ok && (cnt < 999)); + if (!filename_ok) { + printf("Failed to get unique file name: \"%s\"\n", qualifiedName); + exit(-1); + } + strcpy(qualifiedName, new_name); + free(new_name); +} + +static void register_filename(const char* qualifiedName) +{ + struct file_entry* fe = malloc(sizeof(struct file_entry)); + fe->filename_c = strdup(qualifiedName); + fe->next = NULL; + if (first_file == NULL) { + first_file = last_file = fe; + } else { + last_file->next = fe; + last_file = fe; + } +} + +int process_file(FILE *data_file, FILE *struct_file, const char *filename) +{ + char varname[MAX_PATH_LEN]; + int i = 0; + char qualifiedName[MAX_PATH_LEN]; + int file_size; + u16_t http_hdr_chksum = 0; + u16_t http_hdr_len = 0; + int chksum_count = 0; + + /* create qualified name (TODO: prepend slash or not?) */ + sprintf(qualifiedName,"%s/%s", curSubdir, filename); + /* create C variable name */ + strcpy(varname, qualifiedName); + /* convert slashes & dots to underscores */ + fix_filename_for_c(varname, MAX_PATH_LEN); + register_filename(varname); +#if ALIGN_PAYLOAD + /* to force even alignment of array */ + fprintf(data_file, "static const " PAYLOAD_ALIGN_TYPE " dummy_align_%s = %d;" NEWLINE, varname, payload_alingment_dummy_counter++); +#endif /* ALIGN_PAYLOAD */ + fprintf(data_file, "static const unsigned char data_%s[] = {" NEWLINE, varname); + /* encode source file name (used by file system, not returned to browser) */ + fprintf(data_file, "/* %s (%d chars) */" NEWLINE, qualifiedName, strlen(qualifiedName)+1); + file_put_ascii(data_file, qualifiedName, strlen(qualifiedName)+1, &i); +#if ALIGN_PAYLOAD + /* pad to even number of bytes to assure payload is on aligned boundary */ + while(i % PAYLOAD_ALIGNMENT != 0) { + fprintf(data_file, "0x%02.2x,", 0); + i++; + } +#endif /* ALIGN_PAYLOAD */ + fprintf(data_file, NEWLINE); + + file_size = get_file_size(filename); + if (includeHttpHeader) { + file_write_http_header(data_file, filename, file_size, &http_hdr_len, &http_hdr_chksum); + } + if (precalcChksum) { + chksum_count = write_checksums(struct_file, filename, varname, http_hdr_len, http_hdr_chksum); + } + + /* build declaration of struct fsdata_file in temp file */ + fprintf(struct_file, "const struct fsdata_file file_%s[] = { {" NEWLINE, varname); + fprintf(struct_file, "file_%s," NEWLINE, lastFileVar); + fprintf(struct_file, "data_%s," NEWLINE, varname); + fprintf(struct_file, "data_%s + %d," NEWLINE, varname, i); + fprintf(struct_file, "sizeof(data_%s) - %d," NEWLINE, varname, i); + fprintf(struct_file, "%d," NEWLINE, includeHttpHeader); + if (precalcChksum) { + fprintf(struct_file, "#if HTTPD_PRECALCULATED_CHECKSUM" NEWLINE); + fprintf(struct_file, "%d, chksums_%s," NEWLINE, chksum_count, varname); + fprintf(struct_file, "#endif /* HTTPD_PRECALCULATED_CHECKSUM */" NEWLINE); + } + fprintf(struct_file, "}};" NEWLINE NEWLINE); + strcpy(lastFileVar, varname); + + /* write actual file contents */ + i = 0; + fprintf(data_file, NEWLINE "/* raw file data (%d bytes) */" NEWLINE, file_size); + process_file_data(filename, data_file); + fprintf(data_file, "};" NEWLINE NEWLINE); + + return 0; +} + +int file_write_http_header(FILE *data_file, const char *filename, int file_size, + u16_t *http_hdr_len, u16_t *http_hdr_chksum) +{ + int i = 0; + int response_type = HTTP_HDR_OK; + const char* file_type; + const char *cur_string; + size_t cur_len; + int written = 0; + size_t hdr_len = 0; + u16_t acc; + const char *file_ext; + int j; + u8_t keepalive = useHttp11; + + if (keepalive) { + size_t loop; + for (loop = 0; loop < NUM_SHTML_EXTENSIONS; loop++) { + if (strstr(filename, g_pcSSIExtensions[loop])) { + /* no keepalive connection for SSI files */ + keepalive = 0; + } + } + } + + memset(hdr_buf, 0, sizeof(hdr_buf)); + + if (useHttp11) { + response_type = HTTP_HDR_OK_11; + } + + fprintf(data_file, NEWLINE "/* HTTP header */"); + if (strstr(filename, "404") == filename) { + response_type = HTTP_HDR_NOT_FOUND; + if (useHttp11) { + response_type = HTTP_HDR_NOT_FOUND_11; + } + } else if (strstr(filename, "400") == filename) { + response_type = HTTP_HDR_BAD_REQUEST; + if (useHttp11) { + response_type = HTTP_HDR_BAD_REQUEST_11; + } + } else if (strstr(filename, "501") == filename) { + response_type = HTTP_HDR_NOT_IMPL; + if (useHttp11) { + response_type = HTTP_HDR_NOT_IMPL_11; + } + } + cur_string = g_psHTTPHeaderStrings[response_type]; + cur_len = strlen(cur_string); + fprintf(data_file, NEWLINE "/* \"%s\" (%d bytes) */" NEWLINE, cur_string, cur_len); + written += file_put_ascii(data_file, cur_string, cur_len, &i); + i = 0; + if (precalcChksum) { + memcpy(&hdr_buf[hdr_len], cur_string, cur_len); + hdr_len += cur_len; + } + + cur_string = serverID; + cur_len = strlen(cur_string); + fprintf(data_file, NEWLINE "/* \"%s\" (%d bytes) */" NEWLINE, cur_string, cur_len); + written += file_put_ascii(data_file, cur_string, cur_len, &i); + i = 0; + if (precalcChksum) { + memcpy(&hdr_buf[hdr_len], cur_string, cur_len); + hdr_len += cur_len; + } + + file_ext = filename; + if (file_ext != NULL) { + while(strstr(file_ext, ".") != NULL) { + file_ext = strstr(file_ext, "."); + file_ext++; + } + } + if((file_ext == NULL) || (*file_ext == 0)) { + printf("failed to get extension for file \"%s\", using default.\n", filename); + file_type = HTTP_HDR_DEFAULT_TYPE; + } else { + file_type = NULL; + for(j = 0; j < NUM_HTTP_HEADERS; j++) { + if(!strcmp(file_ext, g_psHTTPHeaders[j].extension)) { + file_type = g_psHTTPHeaders[j].content_type; + break; + } + } + if (file_type == NULL) { + printf("failed to get file type for extension \"%s\", using default.\n", file_ext); + file_type = HTTP_HDR_DEFAULT_TYPE; + } + } + + if (useHttp11) { + char intbuf[MAX_PATH_LEN]; + int content_len = file_size; + memset(intbuf, 0, sizeof(intbuf)); + + if (!keepalive) { + content_len *= 2; + } + { + cur_string = g_psHTTPHeaderStrings[HTTP_HDR_CONTENT_LENGTH]; + cur_len = strlen(cur_string); + fprintf(data_file, NEWLINE "/* \"%s%d\r\n\" (%d+ bytes) */" NEWLINE, cur_string, content_len, cur_len+2); + written += file_put_ascii(data_file, cur_string, cur_len, &i); + if (precalcChksum) { + memcpy(&hdr_buf[hdr_len], cur_string, cur_len); + hdr_len += cur_len; + } + + _itoa(content_len, intbuf, 10); + strcat(intbuf, "\r\n"); + cur_len = strlen(intbuf); + written += file_put_ascii(data_file, intbuf, cur_len, &i); + i = 0; + if (precalcChksum) { + memcpy(&hdr_buf[hdr_len], intbuf, cur_len); + hdr_len += cur_len; + } + } + + if (keepalive) { + cur_string = g_psHTTPHeaderStrings[HTTP_HDR_CONN_KEEPALIVE]; + } else { + cur_string = g_psHTTPHeaderStrings[HTTP_HDR_CONN_CLOSE]; + } + cur_len = strlen(cur_string); + fprintf(data_file, NEWLINE "/* \"%s\" (%d bytes) */" NEWLINE, cur_string, cur_len); + written += file_put_ascii(data_file, cur_string, cur_len, &i); + i = 0; + if (precalcChksum) { + memcpy(&hdr_buf[hdr_len], cur_string, cur_len); + hdr_len += cur_len; + } + } + + cur_string = file_type; + cur_len = strlen(cur_string); + fprintf(data_file, NEWLINE "/* \"%s\" (%d bytes) */" NEWLINE, cur_string, cur_len); + written += file_put_ascii(data_file, cur_string, cur_len, &i); + i = 0; + if (precalcChksum) { + memcpy(&hdr_buf[hdr_len], cur_string, cur_len); + hdr_len += cur_len; + + LWIP_ASSERT("hdr_len <= 0xffff", hdr_len <= 0xffff); + LWIP_ASSERT("strlen(hdr_buf) == hdr_len", strlen(hdr_buf) == hdr_len); + acc = ~inet_chksum(hdr_buf, (u16_t)hdr_len); + *http_hdr_len = (u16_t)hdr_len; + *http_hdr_chksum = acc; + } + + return written; +} + +int file_put_ascii(FILE *file, const char* ascii_string, int len, int *i) +{ + int x; + for(x = 0; x < len; x++) { + unsigned char cur = ascii_string[x]; + fprintf(file, "0x%02.2x,", cur); + if ((++(*i) % HEX_BYTES_PER_LINE) == 0) { + fprintf(file, NEWLINE); + } + } + return len; +} + +int s_put_ascii(char *buf, const char *ascii_string, int len, int *i) +{ + int x; + int idx = 0; + for(x = 0; x < len; x++) { + unsigned char cur = ascii_string[x]; + sprintf(&buf[idx], "0x%02.2x,", cur); + idx += 5; + if ((++(*i) % HEX_BYTES_PER_LINE) == 0) { + sprintf(&buf[idx], NEWLINE); + idx += NEWLINE_LEN; + } + } + return len; +} diff --git a/src/apps/httpd/makefsdata/readme.txt b/src/apps/httpd/makefsdata/readme.txt new file mode 100644 index 00000000..3768585e --- /dev/null +++ b/src/apps/httpd/makefsdata/readme.txt @@ -0,0 +1,13 @@ +This directory contains a script ('makefsdata') to create C code suitable for +httpd for given html pages (or other files) in a directory. + +There is also a plain C console application doing the same and extended a bit. + +Usage: htmlgen [targetdir] [-s] [-i]s + targetdir: relative or absolute path to files to convert + switch -s: toggle processing of subdirectories (default is on) + switch -e: exclude HTTP header from file (header is created at runtime, default is on) + switch -11: include HTTP 1.1 header (1.0 is default) + + if targetdir not specified, makefsdata will attempt to + process files in subdirectory 'fs'. diff --git a/src/include/lwip/apps/fs.h b/src/include/lwip/apps/fs.h new file mode 100644 index 00000000..d4ae1581 --- /dev/null +++ b/src/include/lwip/apps/fs.h @@ -0,0 +1,100 @@ +/* + * Copyright (c) 2001-2003 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels + * + */ +#ifndef LWIP_FS_H +#define LWIP_FS_H + +#include "httpd_opts.h" +#include "lwip/err.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#define FS_READ_EOF -1 +#define FS_READ_DELAYED -2 + +#if HTTPD_PRECALCULATED_CHECKSUM +struct fsdata_chksum { + u32_t offset; + u16_t chksum; + u16_t len; +}; +#endif /* HTTPD_PRECALCULATED_CHECKSUM */ + +struct fs_file { + const char *data; + int len; + int index; + void *pextension; +#if HTTPD_PRECALCULATED_CHECKSUM + const struct fsdata_chksum *chksum; + u16_t chksum_count; +#endif /* HTTPD_PRECALCULATED_CHECKSUM */ + u8_t http_header_included; +#if LWIP_HTTPD_CUSTOM_FILES + u8_t is_custom_file; +#endif /* LWIP_HTTPD_CUSTOM_FILES */ +#if LWIP_HTTPD_FILE_STATE + void *state; +#endif /* LWIP_HTTPD_FILE_STATE */ +}; + +#if LWIP_HTTPD_FS_ASYNC_READ +typedef void (*fs_wait_cb)(void *arg); +#endif /* LWIP_HTTPD_FS_ASYNC_READ */ + +err_t fs_open(struct fs_file *file, const char *name); +void fs_close(struct fs_file *file); +#if LWIP_HTTPD_DYNAMIC_FILE_READ +#if LWIP_HTTPD_FS_ASYNC_READ +int fs_read_async(struct fs_file *file, char *buffer, int count, fs_wait_cb callback_fn, void *callback_arg); +#else /* LWIP_HTTPD_FS_ASYNC_READ */ +int fs_read(struct fs_file *file, char *buffer, int count); +#endif /* LWIP_HTTPD_FS_ASYNC_READ */ +#endif /* LWIP_HTTPD_DYNAMIC_FILE_READ */ +#if LWIP_HTTPD_FS_ASYNC_READ +int fs_is_file_ready(struct fs_file *file, fs_wait_cb callback_fn, void *callback_arg); +#endif /* LWIP_HTTPD_FS_ASYNC_READ */ +int fs_bytes_left(struct fs_file *file); + +#if LWIP_HTTPD_FILE_STATE +/** This user-defined function is called when a file is opened. */ +void *fs_state_init(struct fs_file *file, const char *name); +/** This user-defined function is called when a file is closed. */ +void fs_state_free(struct fs_file *file, void *state); +#endif /* #if LWIP_HTTPD_FILE_STATE */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_FS_H */ diff --git a/src/include/lwip/apps/httpd.h b/src/include/lwip/apps/httpd.h new file mode 100644 index 00000000..9d4627d4 --- /dev/null +++ b/src/include/lwip/apps/httpd.h @@ -0,0 +1,199 @@ +/* + * Copyright (c) 2001-2003 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels + * + * This version of the file has been modified by Texas Instruments to offer + * simple server-side-include (SSI) and Common Gateway Interface (CGI) + * capability. + */ + +#ifndef LWIP_HTTPD_H +#define LWIP_HTTPD_H + +#include "httpd_opts.h" +#include "lwip/err.h" +#include "lwip/pbuf.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#if LWIP_HTTPD_CGI + +/* + * Function pointer for a CGI script handler. + * + * This function is called each time the HTTPD server is asked for a file + * whose name was previously registered as a CGI function using a call to + * http_set_cgi_handler. The iIndex parameter provides the index of the + * CGI within the ppcURLs array passed to http_set_cgi_handler. Parameters + * pcParam and pcValue provide access to the parameters provided along with + * the URI. iNumParams provides a count of the entries in the pcParam and + * pcValue arrays. Each entry in the pcParam array contains the name of a + * parameter with the corresponding entry in the pcValue array containing the + * value for that parameter. Note that pcParam may contain multiple elements + * with the same name if, for example, a multi-selection list control is used + * in the form generating the data. + * + * The function should return a pointer to a character string which is the + * path and filename of the response that is to be sent to the connected + * browser, for example "/thanks.htm" or "/response/error.ssi". + * + * The maximum number of parameters that will be passed to this function via + * iNumParams is defined by LWIP_HTTPD_MAX_CGI_PARAMETERS. Any parameters in the incoming + * HTTP request above this number will be discarded. + * + * Requests intended for use by this CGI mechanism must be sent using the GET + * method (which encodes all parameters within the URI rather than in a block + * later in the request). Attempts to use the POST method will result in the + * request being ignored. + * + */ +typedef const char *(*tCGIHandler)(int iIndex, int iNumParams, char *pcParam[], + char *pcValue[]); + +/* + * Structure defining the base filename (URL) of a CGI and the associated + * function which is to be called when that URL is requested. + */ +typedef struct +{ + const char *pcCGIName; + tCGIHandler pfnCGIHandler; +} tCGI; + +void http_set_cgi_handlers(const tCGI *pCGIs, int iNumHandlers); + +#endif /* LWIP_HTTPD_CGI */ + +#if LWIP_HTTPD_SSI + +/* + * Function pointer for the SSI tag handler callback. + * + * This function will be called each time the HTTPD server detects a tag of the + * form in a .shtml, .ssi or .shtm file where "name" appears as + * one of the tags supplied to http_set_ssi_handler in the ppcTags array. The + * returned insert string, which will be appended after the the string + * "" in file sent back to the client,should be written to pointer + * pcInsert. iInsertLen contains the size of the buffer pointed to by + * pcInsert. The iIndex parameter provides the zero-based index of the tag as + * found in the ppcTags array and identifies the tag that is to be processed. + * + * The handler returns the number of characters written to pcInsert excluding + * any terminating NULL or a negative number to indicate a failure (tag not + * recognized, for example). + * + * Note that the behavior of this SSI mechanism is somewhat different from the + * "normal" SSI processing as found in, for example, the Apache web server. In + * this case, the inserted text is appended following the SSI tag rather than + * replacing the tag entirely. This allows for an implementation that does not + * require significant additional buffering of output data yet which will still + * offer usable SSI functionality. One downside to this approach is when + * attempting to use SSI within JavaScript. The SSI tag is structured to + * resemble an HTML comment but this syntax does not constitute a comment + * within JavaScript and, hence, leaving the tag in place will result in + * problems in these cases. To work around this, any SSI tag which needs to + * output JavaScript code must do so in an encapsulated way, sending the whole + * HTML section as a single include. + */ +typedef u16_t (*tSSIHandler)(int iIndex, char *pcInsert, int iInsertLen +#if LWIP_HTTPD_SSI_MULTIPART + , u16_t current_tag_part, u16_t *next_tag_part +#endif /* LWIP_HTTPD_SSI_MULTIPART */ +#if defined(LWIP_HTTPD_FILE_STATE) && LWIP_HTTPD_FILE_STATE + , void *connection_state +#endif /* LWIP_HTTPD_FILE_STATE */ + ); + +void http_set_ssi_handler(tSSIHandler pfnSSIHandler, + const char **ppcTags, int iNumTags); + +#endif /* LWIP_HTTPD_SSI */ + +#if LWIP_HTTPD_SUPPORT_POST + +/* These functions must be implemented by the application */ + +/** Called when a POST request has been received. The application can decide + * whether to accept it or not. + * + * @param connection Unique connection identifier, valid until httpd_post_end + * is called. + * @param uri The HTTP header URI receiving the POST request. + * @param http_request The raw HTTP request (the first packet, normally). + * @param http_request_len Size of 'http_request'. + * @param content_len Content-Length from HTTP header. + * @param response_uri Filename of response file, to be filled when denying the + * request + * @param response_uri_len Size of the 'response_uri' buffer. + * @param post_auto_wnd Set this to 0 to let the callback code handle window + * updates by calling 'httpd_post_data_recved' (to throttle rx speed) + * default is 1 (httpd handles window updates automatically) + * @return ERR_OK: Accept the POST request, data may be passed in + * another err_t: Deny the POST request, send back 'bad request'. + */ +err_t httpd_post_begin(void *connection, const char *uri, const char *http_request, + u16_t http_request_len, int content_len, char *response_uri, + u16_t response_uri_len, u8_t *post_auto_wnd); + +/** Called for each pbuf of data that has been received for a POST. + * ATTENTION: The application is responsible for freeing the pbufs passed in! + * + * @param connection Unique connection identifier. + * @param p Received data. + * @return ERR_OK: Data accepted. + * another err_t: Data denied, http_post_get_response_uri will be called. + */ +err_t httpd_post_receive_data(void *connection, struct pbuf *p); + +/** Called when all data is received or when the connection is closed. + * The application must return the filename/URI of a file to send in response + * to this POST request. If the response_uri buffer is untouched, a 404 + * response is returned. + * + * @param connection Unique connection identifier. + * @param response_uri Filename of response file, to be filled when denying the request + * @param response_uri_len Size of the 'response_uri' buffer. + */ +void httpd_post_finished(void *connection, char *response_uri, u16_t response_uri_len); + +#if LWIP_HTTPD_POST_MANUAL_WND +void httpd_post_data_recved(void *connection, u16_t recved_len); +#endif /* LWIP_HTTPD_POST_MANUAL_WND */ + +#endif /* LWIP_HTTPD_SUPPORT_POST */ + +void httpd_init(void); + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HTTPD_H */ diff --git a/src/include/lwip/apps/httpd_opts.h b/src/include/lwip/apps/httpd_opts.h new file mode 100644 index 00000000..674b436e --- /dev/null +++ b/src/include/lwip/apps/httpd_opts.h @@ -0,0 +1,286 @@ +/* + * Copyright (c) 2001-2003 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels + * + * This version of the file has been modified by Texas Instruments to offer + * simple server-side-include (SSI) and Common Gateway Interface (CGI) + * capability. + */ + +#ifndef LWIP_HTTPD_OPTS_H +#define LWIP_HTTPD_OPTS_H + +#include "lwip/opt.h" + +/** Set this to 1 to support CGI */ +#ifndef LWIP_HTTPD_CGI +#define LWIP_HTTPD_CGI 0 +#endif + +/** Set this to 1 to support SSI (Server-Side-Includes) */ +#ifndef LWIP_HTTPD_SSI +#define LWIP_HTTPD_SSI 0 +#endif + +/** Set this to 1 to support HTTP POST */ +#ifndef LWIP_HTTPD_SUPPORT_POST +#define LWIP_HTTPD_SUPPORT_POST 0 +#endif + +/* The maximum number of parameters that the CGI handler can be sent. */ +#ifndef LWIP_HTTPD_MAX_CGI_PARAMETERS +#define LWIP_HTTPD_MAX_CGI_PARAMETERS 16 +#endif + +/** LWIP_HTTPD_SSI_MULTIPART==1: SSI handler function is called with 2 more + * arguments indicating a counter for insert string that are too long to be + * inserted at once: the SSI handler function must then set 'next_tag_part' + * which will be passed back to it in the next call. */ +#ifndef LWIP_HTTPD_SSI_MULTIPART +#define LWIP_HTTPD_SSI_MULTIPART 0 +#endif + +/* The maximum length of the string comprising the tag name */ +#ifndef LWIP_HTTPD_MAX_TAG_NAME_LEN +#define LWIP_HTTPD_MAX_TAG_NAME_LEN 8 +#endif + +/* The maximum length of string that can be returned to replace any given tag */ +#ifndef LWIP_HTTPD_MAX_TAG_INSERT_LEN +#define LWIP_HTTPD_MAX_TAG_INSERT_LEN 192 +#endif + +#ifndef LWIP_HTTPD_POST_MANUAL_WND +#define LWIP_HTTPD_POST_MANUAL_WND 0 +#endif + +/** This string is passed in the HTTP header as "Server: " */ +#ifndef HTTPD_SERVER_AGENT +#define HTTPD_SERVER_AGENT "lwIP/1.3.1 (http://savannah.nongnu.org/projects/lwip)" +#endif + +/** Set this to 1 if you want to include code that creates HTTP headers + * at runtime. Default is off: HTTP headers are then created statically + * by the makefsdata tool. Static headers mean smaller code size, but + * the (readonly) fsdata will grow a bit as every file includes the HTTP + * header. */ +#ifndef LWIP_HTTPD_DYNAMIC_HEADERS +#define LWIP_HTTPD_DYNAMIC_HEADERS 0 +#endif + +#ifndef HTTPD_DEBUG +#define HTTPD_DEBUG LWIP_DBG_OFF +#endif + +/** Set this to 1 to use a memp pool for allocating + * struct http_state instead of the heap. + */ +#ifndef HTTPD_USE_MEM_POOL +#define HTTPD_USE_MEM_POOL 0 +#endif + +/** The server port for HTTPD to use */ +#ifndef HTTPD_SERVER_PORT +#define HTTPD_SERVER_PORT 80 +#endif + +/** Maximum retries before the connection is aborted/closed. + * - number of times pcb->poll is called -> default is 4*500ms = 2s; + * - reset when pcb->sent is called + */ +#ifndef HTTPD_MAX_RETRIES +#define HTTPD_MAX_RETRIES 4 +#endif + +/** The poll delay is X*500ms */ +#ifndef HTTPD_POLL_INTERVAL +#define HTTPD_POLL_INTERVAL 4 +#endif + +/** Priority for tcp pcbs created by HTTPD (very low by default). + * Lower priorities get killed first when running out of memory. + */ +#ifndef HTTPD_TCP_PRIO +#define HTTPD_TCP_PRIO TCP_PRIO_MIN +#endif + +/** Set this to 1 to enable timing each file sent */ +#ifndef LWIP_HTTPD_TIMING +#define LWIP_HTTPD_TIMING 0 +#endif +#ifndef HTTPD_DEBUG_TIMING +#define HTTPD_DEBUG_TIMING LWIP_DBG_OFF +#endif + +/** Set this to 1 on platforms where strnstr is not available */ +#ifndef LWIP_HTTPD_STRNSTR_PRIVATE +#define LWIP_HTTPD_STRNSTR_PRIVATE 1 +#endif + +/** Set this to one to show error pages when parsing a request fails instead + of simply closing the connection. */ +#ifndef LWIP_HTTPD_SUPPORT_EXTSTATUS +#define LWIP_HTTPD_SUPPORT_EXTSTATUS 0 +#endif + +/** Set this to 0 to drop support for HTTP/0.9 clients (to save some bytes) */ +#ifndef LWIP_HTTPD_SUPPORT_V09 +#define LWIP_HTTPD_SUPPORT_V09 1 +#endif + +/** Set this to 1 to enable HTTP/1.1 persistent connections. + * ATTENTION: If the generated file system includes HTTP headers, these must + * include the "Connection: keep-alive" header (pass argument "-11" to makefsdata). + */ +#ifndef LWIP_HTTPD_SUPPORT_11_KEEPALIVE +#define LWIP_HTTPD_SUPPORT_11_KEEPALIVE 0 +#endif + +/** Set this to 1 to support HTTP request coming in in multiple packets/pbufs */ +#ifndef LWIP_HTTPD_SUPPORT_REQUESTLIST +#define LWIP_HTTPD_SUPPORT_REQUESTLIST 1 +#endif + +#if LWIP_HTTPD_SUPPORT_REQUESTLIST +/** Number of rx pbufs to enqueue to parse an incoming request (up to the first + newline) */ +#ifndef LWIP_HTTPD_REQ_QUEUELEN +#define LWIP_HTTPD_REQ_QUEUELEN 5 +#endif + +/** Number of (TCP payload-) bytes (in pbufs) to enqueue to parse and incoming + request (up to the first double-newline) */ +#ifndef LWIP_HTTPD_REQ_BUFSIZE +#define LWIP_HTTPD_REQ_BUFSIZE LWIP_HTTPD_MAX_REQ_LENGTH +#endif + +/** Defines the maximum length of a HTTP request line (up to the first CRLF, + copied from pbuf into this a global buffer when pbuf- or packet-queues + are received - otherwise the input pbuf is used directly) */ +#ifndef LWIP_HTTPD_MAX_REQ_LENGTH +#define LWIP_HTTPD_MAX_REQ_LENGTH LWIP_MIN(1023, (LWIP_HTTPD_REQ_QUEUELEN * PBUF_POOL_BUFSIZE)) +#endif +#endif /* LWIP_HTTPD_SUPPORT_REQUESTLIST */ + +/** Maximum length of the filename to send as response to a POST request, + * filled in by the application when a POST is finished. + */ +#ifndef LWIP_HTTPD_POST_MAX_RESPONSE_URI_LEN +#define LWIP_HTTPD_POST_MAX_RESPONSE_URI_LEN 63 +#endif + +/** Set this to 0 to not send the SSI tag (default is on, so the tag will + * be sent in the HTML page */ +#ifndef LWIP_HTTPD_SSI_INCLUDE_TAG +#define LWIP_HTTPD_SSI_INCLUDE_TAG 1 +#endif + +/** Set this to 1 to call tcp_abort when tcp_close fails with memory error. + * This can be used to prevent consuming all memory in situations where the + * HTTP server has low priority compared to other communication. */ +#ifndef LWIP_HTTPD_ABORT_ON_CLOSE_MEM_ERROR +#define LWIP_HTTPD_ABORT_ON_CLOSE_MEM_ERROR 0 +#endif + +/** Set this to 1 to kill the oldest connection when running out of + * memory for 'struct http_state' or 'struct http_ssi_state'. + * ATTENTION: This puts all connections on a linked list, so may be kind of slow. + */ +#ifndef LWIP_HTTPD_KILL_OLD_ON_CONNECTIONS_EXCEEDED +#define LWIP_HTTPD_KILL_OLD_ON_CONNECTIONS_EXCEEDED 0 +#endif + +/** Default: Tags are sent from struct http_state and are therefore volatile */ +#ifndef HTTP_IS_TAG_VOLATILE +#define HTTP_IS_TAG_VOLATILE(ptr) TCP_WRITE_FLAG_COPY +#endif + +/* By default, the httpd is limited to send 2*pcb->mss to keep resource usage low + when http is not an important protocol in the device. */ +#ifndef HTTPD_LIMIT_SENDING_TO_2MSS +#define HTTPD_LIMIT_SENDING_TO_2MSS 1 +#endif + +/* Define this to a function that returns the maximum amount of data to enqueue. + The function have this signature: u16_t fn(struct tcp_pcb* pcb); */ +#ifndef HTTPD_MAX_WRITE_LEN +#if HTTPD_LIMIT_SENDING_TO_2MSS +#define HTTPD_MAX_WRITE_LEN(pcb) (2 * tcp_mss(pcb)) +#endif +#endif + +/*------------------- FS OPTIONS -------------------*/ + +/** Set this to 1 and provide the functions: + * - "int fs_open_custom(struct fs_file *file, const char *name)" + * Called first for every opened file to allow opening files + * that are not included in fsdata(_custom).c + * - "void fs_close_custom(struct fs_file *file)" + * Called to free resources allocated by fs_open_custom(). + */ +#ifndef LWIP_HTTPD_CUSTOM_FILES +#define LWIP_HTTPD_CUSTOM_FILES 0 +#endif + +/** Set this to 1 to support fs_read() to dynamically read file data. + * Without this (default=off), only one-block files are supported, + * and the contents must be ready after fs_open(). + */ +#ifndef LWIP_HTTPD_DYNAMIC_FILE_READ +#define LWIP_HTTPD_DYNAMIC_FILE_READ 0 +#endif + +/** Set this to 1 to include an application state argument per file + * that is opened. This allows to keep a state per connection/file. + */ +#ifndef LWIP_HTTPD_FILE_STATE +#define LWIP_HTTPD_FILE_STATE 0 +#endif + +/** HTTPD_PRECALCULATED_CHECKSUM==1: include precompiled checksums for + * predefined (MSS-sized) chunks of the files to prevent having to calculate + * the checksums at runtime. */ +#ifndef HTTPD_PRECALCULATED_CHECKSUM +#define HTTPD_PRECALCULATED_CHECKSUM 0 +#endif + +/** LWIP_HTTPD_FS_ASYNC_READ==1: support asynchronous read operations + * (fs_read_async returns FS_READ_DELAYED and calls a callback when finished). + */ +#ifndef LWIP_HTTPD_FS_ASYNC_READ +#define LWIP_HTTPD_FS_ASYNC_READ 0 +#endif + +/** Set this to 1 to include "fsdata_custom.c" instead of "fsdata.c" for the + * file system (to prevent changing the file included in CVS) */ +#ifndef HTTPD_USE_CUSTOM_FSDATA +#define HTTPD_USE_CUSTOM_FSDATA 0 +#endif + +#endif /* LWIP_HTTPD_OPTS_H */