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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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48
src/api/sockets.c
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@@ -1055,6 +1055,11 @@ int lwip_getsockopt (int s, int level, int optname, void *optval, socklen_t *opt
switch( optname ) {
case TCP_NODELAY:
case TCP_KEEPALIVE:
#if LWIP_TCP_KEEPALIVE
case TCP_KEEPIDLE:
case TCP_KEEPINTVL:
case TCP_KEEPCNT:
#endif /* LWIP_TCP_KEEPALIVE */
break;
default:
@@ -1157,9 +1162,25 @@ int lwip_getsockopt (int s, int level, int optname, void *optval, socklen_t *opt
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_TCP, TCP_NODELAY) = %s\n", s, (*(int*)optval)?"on":"off") );
break;
case TCP_KEEPALIVE:
*(int*)optval = (int)sock->conn->pcb.tcp->keepalive;
*(int*)optval = (int)sock->conn->pcb.tcp->keep_idle;
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, TCP_KEEPALIVE) = %d\n", s, *(int *)optval));
break;
#if LWIP_TCP_KEEPALIVE
case TCP_KEEPIDLE:
*(int*)optval = (int)(sock->conn->pcb.tcp->keep_idle/1000);
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, TCP_KEEPIDLE) = %d\n", s, *(int *)optval));
break;
case TCP_KEEPINTVL:
*(int*)optval = (int)(sock->conn->pcb.tcp->keep_intvl/1000);
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, TCP_KEEPINTVL) = %d\n", s, *(int *)optval));
break;
case TCP_KEEPCNT:
*(int*)optval = (int)sock->conn->pcb.tcp->keep_cnt;
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, TCP_KEEPCNT) = %d\n", s, *(int *)optval));
break;
#endif /* LWIP_TCP_KEEPALIVE */
} /* switch */
break;
}
@@ -1252,6 +1273,11 @@ int lwip_setsockopt (int s, int level, int optname, const void *optval, socklen_
switch( optname ) {
case TCP_NODELAY:
case TCP_KEEPALIVE:
#if LWIP_TCP_KEEPALIVE
case TCP_KEEPIDLE:
case TCP_KEEPINTVL:
case TCP_KEEPCNT:
#endif /* LWIP_TCP_KEEPALIVE */
break;
default:
@@ -1334,9 +1360,25 @@ int lwip_setsockopt (int s, int level, int optname, const void *optval, socklen_
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, TCP_NODELAY) -> %s\n", s, (*(int *)optval)?"on":"off") );
break;
case TCP_KEEPALIVE:
sock->conn->pcb.tcp->keepalive = (u32_t)(*(int*)optval);
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, TCP_KEEPALIVE) -> %lu\n", s, sock->conn->pcb.tcp->keepalive));
sock->conn->pcb.tcp->keep_idle = (u32_t)(*(int*)optval);
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, TCP_KEEPALIVE) -> %lu\n", s, sock->conn->pcb.tcp->keep_idle));
break;
#if LWIP_TCP_KEEPALIVE
case TCP_KEEPIDLE:
sock->conn->pcb.tcp->keep_idle = 1000*(u32_t)(*(int*)optval);
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, TCP_KEEPIDLE) -> %lu\n", s, sock->conn->pcb.tcp->keep_idle));
break;
case TCP_KEEPINTVL:
sock->conn->pcb.tcp->keep_intvl = 1000*(u32_t)(*(int*)optval);
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, TCP_KEEPINTVL) -> %lu\n", s, sock->conn->pcb.tcp->keep_intvl));
break;
case TCP_KEEPCNT:
sock->conn->pcb.tcp->keep_cnt = (u32_t)(*(int*)optval);
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, TCP_KEEPCNT) -> %lu\n", s, sock->conn->pcb.tcp->keep_cnt));
break;
#endif /* LWIP_TCP_KEEPALIVE */
} /* switch */
break;
} /* switch */