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udp.h, udp.c, sockets.c: Changes for "#20503 IGMP Improvement". Add IP_MULTICAST_IF option in socket API, and a new field "multicast_ip" in "struct udp_pcb" (for netconn and raw API users), only if LWIP_IGMP=1. Add getsockopt processing for IP_MULTICAST_TTL and IP_MULTICAST_IF.

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This commit is contained in:
fbernon 2007-09-15 15:19:41 +00:00
parent 93c487fb75
commit 2bdd916b06
4 changed files with 60 additions and 8 deletions
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6
CHANGELOG
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@ -19,6 +19,12 @@ HISTORY
++ New features:
2007-09-15 Frédéric Bernon
* udp.h, udp.c, sockets.c: Changes for "#20503 IGMP Improvement". Add IP_MULTICAST_IF
option in socket API, and a new field "multicast_ip" in "struct udp_pcb" (for
netconn and raw API users), only if LWIP_IGMP=1. Add getsockopt processing for
IP_MULTICAST_TTL and IP_MULTICAST_IF.
2007-09-10 Frédéric Bernon
* snmp.h, mib2.c: enable to remove SNMP timer (which consumne several cycles
even when it's not necessary). snmp_agent.txt tell to call snmp_inc_sysuptime()

49
src/api/sockets.c
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@ -1108,6 +1108,18 @@ int lwip_getsockopt(int s, int level, int optname, void *optval, socklen_t *optl
err = EINVAL;
}
break;
#if LWIP_IGMP
case IP_MULTICAST_TTL:
if (*optlen < sizeof(u8_t)) {
err = EINVAL;
}
break;
case IP_MULTICAST_IF:
if (*optlen < sizeof(struct in_addr)) {
err = EINVAL;
}
break;
#endif /* LWIP_IGMP */
default:
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, UNIMPL: optname=0x%x, ..)\n",
@ -1300,6 +1312,18 @@ static void lwip_getsockopt_internal(void *arg)
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, IP_TOS) = %d\n",
s, *(int *)optval));
break;
#if LWIP_IGMP
case IP_MULTICAST_TTL:
*(u8_t*)optval = sock->conn->pcb.ip->ttl;
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, IP_MULTICAST_TTL) = %d\n",
s, *(int *)optval));
break;
case IP_MULTICAST_IF:
((struct in_addr*) optval)->s_addr = sock->conn->pcb.udp->multicast_ip.addr;
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, IP_MULTICAST_IF) = 0x%x\n",
s, *(u32_t *)optval));
break;
#endif /* LWIP_IGMP */
} /* switch (optname) */
break;
@ -1437,16 +1461,27 @@ int lwip_setsockopt(int s, int level, int optname, const void *optval, socklen_t
break;
#if LWIP_IGMP
case IP_MULTICAST_TTL:
/* NOTE, some BSD implementation use "int", some others "char" */
if ((optlen != sizeof(char)) && (optlen != sizeof(int)))
if (optlen < sizeof(u8_t)) {
err = EINVAL;
}
if (NETCONNTYPE_GROUP(sock->conn->type) != NETCONN_UDP) {
err = EAFNOSUPPORT;
}
break;
case IP_MULTICAST_IF:
if (optlen < sizeof(struct in_addr)) {
err = EINVAL;
}
if (NETCONNTYPE_GROUP(sock->conn->type) != NETCONN_UDP) {
err = EAFNOSUPPORT;
}
break;
case IP_ADD_MEMBERSHIP:
case IP_DROP_MEMBERSHIP:
if (optlen < sizeof(struct ip_mreq)) {
err = EINVAL;
}
if ((sock->conn->type == NETCONN_TCP) || (sock->conn->type == NETCONN_RAW)) {
if (NETCONNTYPE_GROUP(sock->conn->type) != NETCONN_UDP) {
err = EAFNOSUPPORT;
}
break;
@ -1622,10 +1657,10 @@ static void lwip_setsockopt_internal(void *arg)
break;
#if LWIP_IGMP
case IP_MULTICAST_TTL:
if (optlen == sizeof(int))
sock->conn->pcb.tcp->ttl = (u8_t)(*(int*) optval);
if (optlen == sizeof(u8_t))
sock->conn->pcb.tcp->ttl = (u8_t)(*(u8_t*)optval);
sock->conn->pcb.udp->ttl = (u8_t)(*(u8_t*)optval);
break;
case IP_MULTICAST_IF:
sock->conn->pcb.udp->multicast_ip.addr = ((struct in_addr*) optval)->s_addr;
break;
case IP_ADD_MEMBERSHIP:
case IP_DROP_MEMBERSHIP:

6
src/core/udp.c
View File

@ -355,8 +355,14 @@ udp_send(struct udp_pcb *pcb, struct pbuf *p)
return err;
}
}
/* find the outgoing network interface for this packet */
#if LWIP_IGMP
netif = ip_route((ip_addr_ismulticast(&(pcb->remote_ip)))?(&(pcb->multicast_ip)):(&(pcb->remote_ip)));
#else
netif = ip_route(&(pcb->remote_ip));
#endif /* LWIP_IGMP */
/* no outgoing network interface could be found? */
if (netif == NULL) {
LWIP_DEBUGF(UDP_DEBUG | 1, ("udp_send: No route to 0x%"X32_F"\n", pcb->remote_ip.addr));

7
src/include/lwip/udp.h
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@ -77,7 +77,12 @@ struct udp_pcb {
u8_t flags;
/* ports are in host byte order */
u16_t local_port, remote_port;
#if LWIP_IGMP
/* outgoing network interface for multicast packets */
struct ip_addr multicast_ip;
#endif /* LWIP_IGMP */
#if LWIP_UDPLITE
/* used for UDP_LITE only */
u16_t chksum_len_rx, chksum_len_tx;