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fixed bug #43028 (IP_MULTICAST_TTL affects unicast datagrams)

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This commit is contained in:
Joel Cunningham 2015-02-25 21:59:21 +01:00 committed by sg
parent 4eb9efdd33
commit 9004554da3
4 changed files with 23 additions and 4 deletions
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4
CHANGELOG
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@ -202,6 +202,10 @@ HISTORY
++ Bugfixes:
2015-02-25: patch by Joel Cunningham
* udp.h/.c, sockets.c: fixed bug #43028 (IP_MULTICAST_TTL affects unicast
datagrams)
2015-02-25: patch by Greg Renda
* ip4_frag.c: fixed bug #38210 (ip reassembly while remove oldest datagram)

4
src/api/sockets.c
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@ -1803,7 +1803,7 @@ lwip_getsockopt_impl(int s, int level, int optname, void *optval, socklen_t *opt
if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_UDP) {
return ENOPROTOOPT;
}
*(u8_t*)optval = sock->conn->pcb.ip->ttl;
*(u8_t*)optval = sock->conn->pcb.udp->mcast_ttl;
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, IP_MULTICAST_TTL) = %d\n",
s, *(int *)optval));
break;
@ -2160,7 +2160,7 @@ lwip_setsockopt_impl(int s, int level, int optname, const void *optval, socklen_
#if LWIP_IGMP
case IP_MULTICAST_TTL:
LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB_TYPE(sock, optlen, u8_t, NETCONN_UDP);
sock->conn->pcb.udp->ttl = (u8_t)(*(u8_t*)optval);
sock->conn->pcb.udp->mcast_ttl = (u8_t)(*(u8_t*)optval);
break;
case IP_MULTICAST_IF:
{

13
src/core/udp.c
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@ -694,6 +694,7 @@ udp_sendto_if_src_chksum(struct udp_pcb *pcb, struct pbuf *p, const ip_addr_t *d
err_t err;
struct pbuf *q; /* q will be sent down the stack */
u8_t ip_proto;
u8_t ttl;
#if IP_SOF_BROADCAST
/* broadcast filter? */
@ -848,11 +849,18 @@ udp_sendto_if_src_chksum(struct udp_pcb *pcb, struct pbuf *p, const ip_addr_t *d
ip_proto = IP_PROTO_UDP;
}
/* Determine TTL to use */
#if LWIP_IGMP
ttl = (ip_addr_ismulticast(dst_ip) ? pcb->mcast_ttl : pcb->ttl);
#else
ttl = pcb->ttl;
#endif
LWIP_DEBUGF(UDP_DEBUG, ("udp_send: UDP checksum 0x%04"X16_F"\n", udphdr->chksum));
LWIP_DEBUGF(UDP_DEBUG, ("udp_send: ip_output_if (,,,,0x%02"X16_F",)\n", (u16_t)ip_proto));
/* output to IP */
NETIF_SET_HWADDRHINT(netif, &(pcb->addr_hint));
err = ipX_output_if_src(PCB_ISIPV6(pcb), q, src_ip, dst_ip, pcb->ttl, pcb->tos, ip_proto, netif);
err = ipX_output_if_src(PCB_ISIPV6(pcb), q, src_ip, dst_ip, ttl, pcb->tos, ip_proto, netif);
NETIF_SET_HWADDRHINT(netif, NULL);
/* TODO: must this be increased even if error occurred? */
@ -1117,6 +1125,9 @@ udp_new(void)
/* initialize PCB to all zeroes */
memset(pcb, 0, sizeof(struct udp_pcb));
pcb->ttl = UDP_TTL;
#if LWIP_IGMP
pcb->mcast_ttl = UDP_TTL;
#endif
}
return pcb;
}

6
src/include/lwip/udp.h
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@ -124,6 +124,8 @@ struct udp_pcb {
#if LWIP_IGMP
/** outgoing network interface for multicast packets */
ip_addr_t multicast_ip;
/** TTL for outgoing multicast packets */
u8_t mcast_ttl;
#endif /* LWIP_IGMP */
#if LWIP_UDPLITE
@ -207,8 +209,10 @@ struct udp_pcb * udp_new_ip6(void);
#endif /* LWIP_IPV6 */
#if LWIP_IGMP
#define udp_set_multicast_netif_addr(pcb, ip4addr) ((pcb)->multicast_ip = *(ip4addr))
#define udp_set_multicast_netif_addr(pcb, ip4addr) do { (pcb)->multicast_ip = *(ip4addr); } while(0)
#define udp_get_multicast_netif_addr(pcb) (&(pcb)->multicast_ip)
#define udp_set_multicast_ttl(pcb, mcast_ttl) do { (pcb)->mcast_ttl = mcast_ttl; } while(0)
#define udp_get_multicast_ttl(pcb) ((pcb)->mcast_ttl)
#endif /* LWIP_IGMP */
#if UDP_DEBUG