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Applied Patch #1326 (TCP: readability, debugging, performance fixes by floriZ)

Browse Source 
with various improvements and adaptations.
This commit is contained in:
marcbou 2003-06-19 14:26:21 +00:00
parent cea3ff9d38
commit 77eea999d9
4 changed files with 51 additions and 39 deletions
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20
src/core/tcp.c
View File

@ -1038,24 +1038,24 @@ tcp_debug_print(struct tcp_hdr *tcphdr)
{ {
LWIP_DEBUGF(TCP_DEBUG, ("TCP header:\n")); LWIP_DEBUGF(TCP_DEBUG, ("TCP header:\n"));
LWIP_DEBUGF(TCP_DEBUG, ("+-------------------------------+\n")); LWIP_DEBUGF(TCP_DEBUG, ("+-------------------------------+\n"));
LWIP_DEBUGF(TCP_DEBUG, ("| %04x | %04x | (src port, dest port)\n", LWIP_DEBUGF(TCP_DEBUG, ("| %5u | %5u | (src port, dest port)\n",
tcphdr->src, tcphdr->dest)); ntohs(tcphdr->src), ntohs(tcphdr->dest)));
LWIP_DEBUGF(TCP_DEBUG, ("+-------------------------------+\n")); LWIP_DEBUGF(TCP_DEBUG, ("+-------------------------------+\n"));
LWIP_DEBUGF(TCP_DEBUG, ("| %08lu | (seq no)\n", LWIP_DEBUGF(TCP_DEBUG, ("| %010lu | (seq no)\n",
tcphdr->seqno)); ntohl(tcphdr->seqno)));
LWIP_DEBUGF(TCP_DEBUG, ("+-------------------------------+\n")); LWIP_DEBUGF(TCP_DEBUG, ("+-------------------------------+\n"));
LWIP_DEBUGF(TCP_DEBUG, ("| %08lu | (ack no)\n", LWIP_DEBUGF(TCP_DEBUG, ("| %010lu | (ack no)\n",
tcphdr->ackno)); ntohl(tcphdr->ackno)));
LWIP_DEBUGF(TCP_DEBUG, ("+-------------------------------+\n")); LWIP_DEBUGF(TCP_DEBUG, ("+-------------------------------+\n"));
LWIP_DEBUGF(TCP_DEBUG, ("| %2u | |%u%u%u%u%u| %5u | (offset, flags (", LWIP_DEBUGF(TCP_DEBUG, ("| %2u | |%u%u%u%u%u%u| %5u | (hdrlen, flags (",
TCPH_OFFSET(tcphdr), TCPH_HDRLEN(tcphdr),
TCPH_FLAGS(tcphdr) >> 4 & 1, TCPH_FLAGS(tcphdr) >> 5 & 1,
TCPH_FLAGS(tcphdr) >> 4 & 1, TCPH_FLAGS(tcphdr) >> 4 & 1,
TCPH_FLAGS(tcphdr) >> 3 & 1, TCPH_FLAGS(tcphdr) >> 3 & 1,
TCPH_FLAGS(tcphdr) >> 2 & 1, TCPH_FLAGS(tcphdr) >> 2 & 1,
TCPH_FLAGS(tcphdr) >> 1 & 1, TCPH_FLAGS(tcphdr) >> 1 & 1,
TCPH_FLAGS(tcphdr) & 1, TCPH_FLAGS(tcphdr) & 1,
tcphdr->wnd)); ntohs(tcphdr->wnd)));
tcp_debug_print_flags(TCPH_FLAGS(tcphdr)); tcp_debug_print_flags(TCPH_FLAGS(tcphdr));
LWIP_DEBUGF(TCP_DEBUG, ("), win)\n")); LWIP_DEBUGF(TCP_DEBUG, ("), win)\n"));
LWIP_DEBUGF(TCP_DEBUG, ("+-------------------------------+\n")); LWIP_DEBUGF(TCP_DEBUG, ("+-------------------------------+\n"));

18
src/core/tcp_in.c
View File

@ -99,7 +99,7 @@ tcp_input(struct pbuf *p, struct netif *inp)
{ {
struct tcp_pcb *pcb, *prev; struct tcp_pcb *pcb, *prev;
struct tcp_pcb_listen *lpcb; struct tcp_pcb_listen *lpcb;
u8_t offset; u8_t hdrlen;
err_t err; err_t err;
@ -113,6 +113,10 @@ tcp_input(struct pbuf *p, struct netif *inp)
iphdr = p->payload; iphdr = p->payload;
tcphdr = (struct tcp_hdr *)((u8_t *)p->payload + IPH_HL(iphdr) * 4); tcphdr = (struct tcp_hdr *)((u8_t *)p->payload + IPH_HL(iphdr) * 4);
#if TCP_INPUT_DEBUG
tcp_debug_print(tcphdr);
#endif
/* remove header from payload */ /* remove header from payload */
if (pbuf_header(p, -((s16_t)(IPH_HL(iphdr) * 4))) || (p->tot_len < sizeof(struct tcp_hdr))) { if (pbuf_header(p, -((s16_t)(IPH_HL(iphdr) * 4))) || (p->tot_len < sizeof(struct tcp_hdr))) {
/* drop short packets */ /* drop short packets */
@ -154,8 +158,8 @@ tcp_input(struct pbuf *p, struct netif *inp)
/* Move the payload pointer in the pbuf so that it points to the /* Move the payload pointer in the pbuf so that it points to the
TCP data instead of the TCP header. */ TCP data instead of the TCP header. */
offset = TCPH_OFFSET(tcphdr) >> 4; hdrlen = TCPH_HDRLEN(tcphdr);
pbuf_header(p, -(offset * 4)); pbuf_header(p, -(hdrlen * 4));
/* Convert fields in TCP header to host byte order. */ /* Convert fields in TCP header to host byte order. */
tcphdr->src = ntohs(tcphdr->src); tcphdr->src = ntohs(tcphdr->src);
@ -934,7 +938,7 @@ tcp_receive(struct tcp_pcb *pcb)
inseg.p = NULL; inseg.p = NULL;
} }
if (TCPH_FLAGS(inseg.tcphdr) & TCP_FIN) { if (TCPH_FLAGS(inseg.tcphdr) & TCP_FIN) {
LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_receive: received FIN.")); LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_receive: received FIN.\n"));
recv_flags = TF_GOT_FIN; recv_flags = TF_GOT_FIN;
} }
@ -965,7 +969,7 @@ tcp_receive(struct tcp_pcb *pcb)
cseg->p = NULL; cseg->p = NULL;
} }
if (flags & TCP_FIN) { if (flags & TCP_FIN) {
LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_receive: dequeued FIN.")); LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_receive: dequeued FIN.\n"));
recv_flags = TF_GOT_FIN; recv_flags = TF_GOT_FIN;
} }
@ -1122,8 +1126,8 @@ tcp_parseopt(struct tcp_pcb *pcb)
opts = (u8_t *)tcphdr + TCP_HLEN; opts = (u8_t *)tcphdr + TCP_HLEN;
/* Parse the TCP MSS option, if present. */ /* Parse the TCP MSS option, if present. */
if ((TCPH_OFFSET(tcphdr) & 0xf0) > 0x50) { if(TCPH_HDRLEN(tcphdr) > 0x5) {
for(c = 0; c < ((TCPH_OFFSET(tcphdr) >> 4) - 5) << 2 ;) { for(c = 0; c < (TCPH_HDRLEN(tcphdr) - 5) << 2 ;) {
opt = opts[c]; opt = opts[c];
if (opt == 0x00) { if (opt == 0x00) {
/* End of options. */ /* End of options. */

18
src/core/tcp_out.c
View File

@ -249,10 +249,10 @@ tcp_enqueue(struct tcp_pcb *pcb, void *arg, u16_t len,
/* Copy the options into the header, if they are present. */ /* Copy the options into the header, if they are present. */
if (optdata == NULL) { if (optdata == NULL) {
TCPH_OFFSET_SET(seg->tcphdr, 5 << 4); TCPH_HDRLEN_SET(seg->tcphdr, 5);
} }
else { else {
TCPH_OFFSET_SET(seg->tcphdr, (5 + optlen / 4) << 4); TCPH_HDRLEN_SET(seg->tcphdr, (5 + optlen / 4));
/* Copy options into data portion of segment. /* Copy options into data portion of segment.
Options can thus only be sent in non data carrying Options can thus only be sent in non data carrying
segments such as SYN|ACK. */ segments such as SYN|ACK. */
@ -327,7 +327,7 @@ tcp_enqueue(struct tcp_pcb *pcb, void *arg, u16_t len,
/* Set the PSH flag in the last segment that we enqueued, but only /* Set the PSH flag in the last segment that we enqueued, but only
if the segment has data (indicated by seglen > 0). */ if the segment has data (indicated by seglen > 0). */
if (seg != NULL && seglen > 0 && seg->tcphdr != NULL) { if (seg != NULL && seglen > 0 && seg->tcphdr != NULL) {
TCPH_FLAGS_SET(seg->tcphdr, TCPH_FLAGS(seg->tcphdr) | TCP_PSH); TCPH_SET_FLAG(seg->tcphdr, TCP_PSH);
} }
return ERR_OK; return ERR_OK;
@ -372,6 +372,7 @@ tcp_output(struct tcp_pcb *pcb)
seg = pcb->unsent; seg = pcb->unsent;
useg = pcb->unacked;
/* If the TF_ACK_NOW flag is set, we check if there is data that is /* If the TF_ACK_NOW flag is set, we check if there is data that is
to be sent. If data is to be sent out, we'll just piggyback our to be sent. If data is to be sent out, we'll just piggyback our
@ -398,7 +399,7 @@ tcp_output(struct tcp_pcb *pcb)
TCPH_FLAGS_SET(tcphdr, TCP_ACK); TCPH_FLAGS_SET(tcphdr, TCP_ACK);
tcphdr->wnd = htons(pcb->rcv_wnd); tcphdr->wnd = htons(pcb->rcv_wnd);
tcphdr->urgp = 0; tcphdr->urgp = 0;
TCPH_OFFSET_SET(tcphdr, 5 << 4); TCPH_HDRLEN_SET(tcphdr, 5);
tcphdr->chksum = 0; tcphdr->chksum = 0;
tcphdr->chksum = inet_chksum_pseudo(p, &(pcb->local_ip), &(pcb->remote_ip), tcphdr->chksum = inet_chksum_pseudo(p, &(pcb->local_ip), &(pcb->remote_ip),
@ -443,7 +444,7 @@ tcp_output(struct tcp_pcb *pcb)
pcb->unsent = seg->next; pcb->unsent = seg->next;
if (pcb->state != SYN_SENT) { if (pcb->state != SYN_SENT) {
TCPH_FLAGS_SET(seg->tcphdr, TCPH_FLAGS(seg->tcphdr) | TCP_ACK); TCPH_SET_FLAG(seg->tcphdr, TCP_ACK);
pcb->flags &= ~(TF_ACK_DELAY | TF_ACK_NOW); pcb->flags &= ~(TF_ACK_DELAY | TF_ACK_NOW);
} }
@ -457,11 +458,10 @@ tcp_output(struct tcp_pcb *pcb)
seg->next = NULL; seg->next = NULL;
if (pcb->unacked == NULL) { if (pcb->unacked == NULL) {
pcb->unacked = seg; pcb->unacked = seg;
useg = seg;
} else { } else {
for (useg = pcb->unacked; useg->next != NULL; useg = useg->next);
useg->next = seg; useg->next = seg;
useg = useg->next;
} }
} else { } else {
tcp_seg_free(seg); tcp_seg_free(seg);
@ -552,7 +552,7 @@ tcp_rst(u32_t seqno, u32_t ackno,
TCPH_FLAGS_SET(tcphdr, TCP_RST | TCP_ACK); TCPH_FLAGS_SET(tcphdr, TCP_RST | TCP_ACK);
tcphdr->wnd = htons(TCP_WND); tcphdr->wnd = htons(TCP_WND);
tcphdr->urgp = 0; tcphdr->urgp = 0;
TCPH_OFFSET_SET(tcphdr, 5 << 4); TCPH_HDRLEN_SET(tcphdr, 5);
tcphdr->chksum = 0; tcphdr->chksum = 0;
tcphdr->chksum = inet_chksum_pseudo(p, local_ip, remote_ip, tcphdr->chksum = inet_chksum_pseudo(p, local_ip, remote_ip,

30
src/include/lwip/tcp.h
View File

@ -158,7 +158,7 @@ struct tcp_hdr {
PACK_STRUCT_FIELD(u16_t dest); PACK_STRUCT_FIELD(u16_t dest);
PACK_STRUCT_FIELD(u32_t seqno); PACK_STRUCT_FIELD(u32_t seqno);
PACK_STRUCT_FIELD(u32_t ackno); PACK_STRUCT_FIELD(u32_t ackno);
PACK_STRUCT_FIELD(u16_t _offset_flags); PACK_STRUCT_FIELD(u16_t _hdrlen_rsvd_flags);
PACK_STRUCT_FIELD(u16_t wnd); PACK_STRUCT_FIELD(u16_t wnd);
PACK_STRUCT_FIELD(u16_t chksum); PACK_STRUCT_FIELD(u16_t chksum);
PACK_STRUCT_FIELD(u16_t urgp); PACK_STRUCT_FIELD(u16_t urgp);
@ -168,11 +168,15 @@ PACK_STRUCT_END
# include "arch/epstruct.h" # include "arch/epstruct.h"
#endif #endif
#define TCPH_OFFSET(hdr) (ntohs((hdr)->_offset_flags) >> 8) #define TCPH_OFFSET(phdr) (ntohs((phdr)->_hdrlen_rsvd_flags) >> 8)
#define TCPH_FLAGS(hdr) (ntohs((hdr)->_offset_flags) & 0xff) #define TCPH_HDRLEN(phdr) (ntohs((phdr)->_hdrlen_rsvd_flags) >> 12)
#define TCPH_FLAGS(phdr) (ntohs((phdr)->_hdrlen_rsvd_flags) & TCP_FLAGS)
#define TCPH_OFFSET_SET(hdr, offset) (hdr)->_offset_flags = htons(((offset) << 8) | TCPH_FLAGS(hdr)) #define TCPH_OFFSET_SET(phdr, offset) (phdr)->_hdrlen_rsvd_flags = htons(((offset) << 8) | TCPH_FLAGS(phdr))
#define TCPH_FLAGS_SET(hdr, flags) (hdr)->_offset_flags = htons((TCPH_OFFSET(hdr) << 8) | (flags)) #define TCPH_HDRLEN_SET(phdr, len) (phdr)->_hdrlen_rsvd_flags = htons(((len) << 12) | TCPH_FLAGS(phdr))
#define TCPH_FLAGS_SET(phdr, flags) (phdr)->_hdrlen_rsvd_flags = htons((ntohs((phdr)->_hdrlen_rsvd_flags) & ~TCP_FLAGS) | (flags))
#define TCPH_SET_FLAG(phdr, flags ) (phdr)->_hdrlen_rsvd_flags = htons(ntohs((phdr)->_hdrlen_rsvd_flags) | (flags))
#define TCPH_UNSET_FLAG(phdr, flags) (phdr)->_hdrlen_rsvd_flags = htons(ntohs((phdr)->_hdrlen_rsvd_flags) | (TCPH_FLAGS(phdr) & ~(flags)) )
#define TCP_TCPLEN(seg) ((seg)->len + ((TCPH_FLAGS((seg)->tcphdr) & TCP_FIN || \ #define TCP_TCPLEN(seg) ((seg)->len + ((TCPH_FLAGS((seg)->tcphdr) & TCP_FIN || \
TCPH_FLAGS((seg)->tcphdr) & TCP_SYN)? 1: 0)) TCPH_FLAGS((seg)->tcphdr) & TCP_SYN)? 1: 0))
@ -219,12 +223,12 @@ struct tcp_pcb {
u16_t mss; /* maximum segment size */ u16_t mss; /* maximum segment size */
u8_t flags; u8_t flags;
#define TF_ACK_DELAY 0x01U /* Delayed ACK. */ #define TF_ACK_DELAY (u8_t)0x01U /* Delayed ACK. */
#define TF_ACK_NOW 0x02U /* Immediate ACK. */ #define TF_ACK_NOW (u8_t)0x02U /* Immediate ACK. */
#define TF_INFR 0x04U /* In fast recovery. */ #define TF_INFR (u8_t)0x04U /* In fast recovery. */
#define TF_RESET 0x08U /* Connection was reset. */ #define TF_RESET (u8_t)0x08U /* Connection was reset. */
#define TF_CLOSED 0x10U /* Connection was sucessfully closed. */ #define TF_CLOSED (u8_t)0x10U /* Connection was sucessfully closed. */
#define TF_GOT_FIN 0x20U /* Connection was closed by the remote end. */ #define TF_GOT_FIN (u8_t)0x20U /* Connection was closed by the remote end. */
/* RTT estimation variables. */ /* RTT estimation variables. */
u16_t rttest; /* RTT estimate in 500ms ticks */ u16_t rttest; /* RTT estimate in 500ms ticks */
@ -406,6 +410,10 @@ void tcp_debug_print_state(enum tcp_state s);
void tcp_debug_print_pcbs(void); void tcp_debug_print_pcbs(void);
int tcp_pcbs_sane(void); int tcp_pcbs_sane(void);
#else #else
# define tcp_debug_print(tcphdr)
# define tcp_debug_print_flags(flags)
# define tcp_debug_print_state(s)
# define tcp_debug_print_pcbs()
# define tcp_pcbs_sane() 1 # define tcp_pcbs_sane() 1
#endif /* TCP_DEBUG */ #endif /* TCP_DEBUG */