abc/lwip
1
0
Fork 0
mirror of https://git.savannah.nongnu.org/git/lwip.git synced 2025-08-04 21:44:38 +08:00
Code Issues Packages Projects Releases Wiki Activity

Tried to fix bug #47270 by accepting all ipv4 multicast packets (at IP level) when LWIP_IGMP is disabled

Browse Source
This commit is contained in:
sg 2016-03-04 21:57:47 +01:00
parent 15326cdbad
commit 6b405eccd0
1 changed files with 8 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
src/core/ipv4/ip4.c
View File

@ -450,8 +450,8 @@ ip4_input(struct pbuf *p, struct netif *inp)
ip_addr_copy_from_ip4(ip_data.current_iphdr_src, iphdr->src); ip_addr_copy_from_ip4(ip_data.current_iphdr_src, iphdr->src);
/* match packet against an interface, i.e. is this packet for us? */ /* match packet against an interface, i.e. is this packet for us? */
#if LWIP_IGMP
if (ip4_addr_ismulticast(ip4_current_dest_addr())) { if (ip4_addr_ismulticast(ip4_current_dest_addr())) {
#if LWIP_IGMP
if ((inp->flags & NETIF_FLAG_IGMP) && (igmp_lookfor_group(inp, ip4_current_dest_addr()))) { if ((inp->flags & NETIF_FLAG_IGMP) && (igmp_lookfor_group(inp, ip4_current_dest_addr()))) {
/* IGMP snooping switches need 0.0.0.0 to be allowed as source address (RFC 4541) */ /* IGMP snooping switches need 0.0.0.0 to be allowed as source address (RFC 4541) */
ip4_addr_t allsystems; ip4_addr_t allsystems;
@ -464,9 +464,14 @@ ip4_input(struct pbuf *p, struct netif *inp)
} else { } else {
netif = NULL; netif = NULL;
} }
} else #else /* LWIP_IGMP */
if ((netif_is_up(inp)) && (!ip4_addr_isany_val(*netif_ip4_addr(inp)))) {
netif = inp;
} else {
netif = NULL;
}
#endif /* LWIP_IGMP */ #endif /* LWIP_IGMP */
{ } else {
/* start trying with inp. if that's not acceptable, start walking the /* start trying with inp. if that's not acceptable, start walking the
list of configured netifs. list of configured netifs.
'first' is used as a boolean to mark whether we started walking the list */ 'first' is used as a boolean to mark whether we started walking the list */