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KRT: Fix direct routes for BSD

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Old way to set direct routes is to use local IP as gateway, but that does
not work properly on newer FreeBSDs. Now we use sockaddr_dl containing
interface index as gateway.
This commit is contained in:
Ondrej Zajicek (work) 2018-01-14 14:30:38 +01:00
parent 2e507a7457
commit 4d36796131
1 changed files with 22 additions and 6 deletions
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28
sysdep/bsd/krt-sock.c
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@ -186,6 +186,16 @@ struct ks_msg
memcpy(p, body, (l > sizeof(*p) ? sizeof(*p) : l));\
body += l;}
static inline void
sockaddr_fill_dl(struct sockaddr_dl *sa, struct iface *ifa)
{
uint len = OFFSETOF(struct sockaddr_dl, sdl_data);
memset(sa, 0, len);
sa->sdl_len = len;
sa->sdl_family = AF_LINK;
sa->sdl_index = ifa->index;
}
static int
krt_send_route(struct krt_proto *p, int cmd, rte *e)
{
@ -291,11 +301,8 @@ krt_send_route(struct krt_proto *p, int cmd, rte *e)
{
/* Fallback for all other valid cases */
#ifdef RTF_CLONING
if (cmd == RTM_ADD && (i->flags & IF_MULTIACCESS) != IF_MULTIACCESS) /* PTP */
msg.rtm.rtm_flags |= RTF_CLONING;
#endif
#if __OpenBSD__
/* Keeping temporarily old code for OpenBSD */
struct ifa *addr = (net->n.addr->type == NET_IP4) ? i->addr4 : (i->addr6 ?: i->llv6);
if (!addr)
@ -304,7 +311,16 @@ krt_send_route(struct krt_proto *p, int cmd, rte *e)
return -1;
}
sockaddr_fill(&gate, af, addr->ip, i, 0);
/* Embed interface ID to link-local address */
ip_addr gw = addr->ip;
if (ipa_is_link_local(gw))
_I0(gw) = 0xfe800000 | (i->index & 0x0000ffff);
sockaddr_fill(&gate, af, gw, i, 0);
#else
sockaddr_fill_dl(&gate, i);
#endif
msg.rtm.rtm_addrs |= RTA_GATEWAY;
break;
}