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Keepalive values can be configured at run time with LWIP_TCP_KEEPALIVE, but don't change this unless you know what you're doing (default are RFC1122 compliant). Note that TCP_KEEPIDLE and TCP_KEEPINTVL have to be set in seconds.

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Old TCP_KEEPALIVE can always be used, and its only difference with TCP_KEEPIDLE is this last use seconds and not milliseconds with setsockopt.

Some documentation (not perfect, but...):

http://publib.boulder.ibm.com/infocenter/pseries/v5r3/index.jsp?topic=/com.ibm.aix.commtechref/doc/commtrf2/setsockopt.htm
This commit is contained in:
fbernon
2007-03-11 15:53:43 +00:00
parent 41a84ef1d3
commit 5c65d4733b
7 changed files with 97 additions and 21 deletions
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6
src/include/lwip/opt.h
View File

@@ -420,6 +420,12 @@ a lot of data that needs to be copied, this should be set high. */
#define LWIP_POSIX_SOCKETS_IO_NAMES 1
#endif
/* Enable TCP_KEEPIDLE, TCP_KEEPINTVL and TCP_KEEPCNT options processing.
Note that TCP_KEEPIDLE and TCP_KEEPINTVL have to be set in seconds. */
#ifndef LWIP_TCP_KEEPALIVE
#define LWIP_TCP_KEEPALIVE 0
#endif
/* Enable SO_RCVTIMEO processing (only for UDP sockets) */
#ifndef LWIP_SO_RCVTIMEO
#define LWIP_SO_RCVTIMEO 0

28
src/include/lwip/tcp.h
View File

@@ -155,22 +155,26 @@ void tcp_rexmit_rto (struct tcp_pcb *pcb);
* User-settable options (used with setsockopt).
*/
#define TCP_NODELAY 0x01 /* don't delay send to coalesce packets */
#define TCP_KEEPALIVE 0x02 /* send KEEPALIVE probes when idle for pcb->keepalive miliseconds */
#define TCP_KEEPALIVE 0x02 /* send KEEPALIVE probes when idle for pcb->keep_idle milliseconds */
#define TCP_KEEPIDLE 0x03 /* set pcb->keep_idle - Same as TCP_KEEPALIVE, but use seconds for get/setsockopt*/
#define TCP_KEEPINTVL 0x04 /* set pcb->keep_intvl - Use seconds for get/setsockopt */
#define TCP_KEEPCNT 0x05 /* set pcb->keep_cnt - Use number of probes sent for get/setsockopt */
/* Keepalive values, compliant with RFC 1122. Don't change this unless you know what you're doing */
#ifndef TCP_KEEPDEFAULT
#define TCP_KEEPDEFAULT 7200000 /* KEEPALIVE timer in miliseconds */
#ifndef TCP_KEEPIDLE_DEFAULT
#define TCP_KEEPIDLE_DEFAULT 7200000 /* Default KEEPALIVE timer in milliseconds */
#endif
#ifndef TCP_KEEPINTVL
#define TCP_KEEPINTVL 75000 /* Time between KEEPALIVE probes in miliseconds */
#ifndef TCP_KEEPINTVL_DEFAULT
#define TCP_KEEPINTVL_DEFAULT 75000 /* Default Time between KEEPALIVE probes in milliseconds */
#endif
#ifndef TCP_KEEPCNT
#define TCP_KEEPCNT 9 /* Counter for KEEPALIVE probes */
#ifndef TCP_KEEPCNT_DEFAULT
#define TCP_KEEPCNT_DEFAULT 9 /* Default Counter for KEEPALIVE probes */
#endif
#define TCP_MAXIDLE TCP_KEEPCNT * TCP_KEEPINTVL /* Maximum KEEPALIVE probe time */
#define TCP_MAXIDLE TCP_KEEPCNT_DEFAULT * TCP_KEEPINTVL_DEFAULT /* Maximum KEEPALIVE probe time */
#ifdef PACK_STRUCT_USE_INCLUDES
# include "arch/bpstruct.h"
@@ -311,10 +315,14 @@ struct tcp_pcb {
#endif /* LWIP_CALLBACK_API */
/* idle time before KEEPALIVE is sent */
u32_t keepalive;
u32_t keep_idle;
#if LWIP_TCP_KEEPALIVE
u32_t keep_intvl;
u32_t keep_cnt;
#endif /* LWIP_TCP_KEEPALIVE */
/* KEEPALIVE counter */
u8_t keep_cnt;
u8_t keep_cnt_sent;
};
struct tcp_pcb_listen {