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| author | Jiri Pirko <jiri@resnulli.us> | 2013-03-17 10:31:18 +0100 |
|---|---|---|
| committer | Jiri Pirko <jiri@resnulli.us> | 2013-03-17 11:11:48 +0100 |
| commit | b2164948b972fc09fcbd26dfdfd011a1773384a7 (patch) | |
| tree | 8336cc2f68159968223c9e8a110ecd249838525c /libndp | |
| parent | 6c41f0bfc851c941fb762b178f62bba28d838320 (diff) | |
| download | libndp-b2164948b972fc09fcbd26dfdfd011a1773384a7.tar.gz | |
lib: adjust destination address before send for certain ND types
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Diffstat (limited to 'libndp')
| -rw-r--r-- | libndp/libndp.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/libndp/libndp.c b/libndp/libndp.c index c306ad4..4fb75a1 100644 --- a/libndp/libndp.c +++ b/libndp/libndp.c @@ -719,14 +719,40 @@ struct ndp_msg_type_info { char strabbr[NDP_STRABBR_SIZE]; uint8_t raw_type; size_t raw_struct_size; + void (*addrto_adjust)(struct in6_addr *addr); }; +static void ndp_msg_addrto_adjust_all_nodes(struct in6_addr *addr) +{ + struct in6_addr any = IN6ADDR_ANY_INIT; + + if (memcmp(addr, &any, sizeof(any))) + return; + addr->s6_addr32[0] = htonl(0xFF020000); + addr->s6_addr32[1] = 0; + addr->s6_addr32[2] = 0; + addr->s6_addr32[3] = htonl(0x1); +} + +static void ndp_msg_addrto_adjust_all_routers(struct in6_addr *addr) +{ + struct in6_addr any = IN6ADDR_ANY_INIT; + + if (memcmp(addr, &any, sizeof(any))) + return; + addr->s6_addr32[0] = htonl(0xFF020000); + addr->s6_addr32[1] = 0; + addr->s6_addr32[2] = 0; + addr->s6_addr32[3] = htonl(0x2); +} + static struct ndp_msg_type_info ndp_msg_type_info_list[] = { [NDP_MSG_RS] = { .strabbr = "RS", .raw_type = ND_ROUTER_SOLICIT, .raw_struct_size = sizeof(struct nd_router_solicit), + .addrto_adjust = ndp_msg_addrto_adjust_all_routers, }, [NDP_MSG_RA] = { .strabbr = "RA", @@ -737,6 +763,7 @@ static struct ndp_msg_type_info ndp_msg_type_info_list[] = .strabbr = "NS", .raw_type = ND_NEIGHBOR_SOLICIT, .raw_struct_size = sizeof(struct nd_neighbor_solicit), + .addrto_adjust = ndp_msg_addrto_adjust_all_nodes, }, [NDP_MSG_NA] = { .strabbr = "NA", @@ -1059,6 +1086,10 @@ void ndp_msg_ifindex_set(struct ndp_msg *msg, uint32_t ifindex) NDP_EXPORT int ndp_msg_send(struct ndp *ndp, struct ndp_msg *msg) { + enum ndp_msg_type msg_type = ndp_msg_type(msg); + + if (ndp_msg_type_info(msg_type)->addrto_adjust) + ndp_msg_type_info(msg_type)->addrto_adjust(&msg->addrto); return mysendto6(ndp->sock, msg->buf, msg->len, 0, &msg->addrto, msg->ifindex); } |