diff options
Diffstat (limited to 'netlink.c')
| -rw-r--r-- | netlink.c | 15 |
1 files changed, 14 insertions, 1 deletions
@@ -33,6 +33,7 @@ #include "util.h" #include "passt.h" #include "log.h" +#include "ip.h" #include "netlink.h" /* Netlink expects a buffer of at least 8kiB or the system page size, @@ -270,6 +271,7 @@ unsigned int nl_get_ext_if(int s, sa_family_t af) seq = nl_send(s, &req, RTM_GETROUTE, NLM_F_DUMP, sizeof(req)); nl_foreach_oftype(nh, status, s, buf, seq, RTM_NEWROUTE) { struct rtmsg *rtm = (struct rtmsg *)NLMSG_DATA(nh); + const void *dst = NULL; unsigned thisifi = 0; if (rtm->rtm_family != af) @@ -284,12 +286,23 @@ unsigned int nl_get_ext_if(int s, sa_family_t af) rtnh = (struct rtnexthop *)RTA_DATA(rta); thisifi = rtnh->rtnh_ifindex; + } else if (rta->rta_type == RTA_DST) { + dst = RTA_DATA(rta); } } if (!thisifi) continue; /* No interface for this route */ + /* Skip routes to link-local addresses */ + if (af == AF_INET && dst && + IN4_IS_PREFIX_LINKLOCAL(dst, rtm->rtm_dst_len)) + continue; + + if (af == AF_INET6 && dst && + IN6_IS_PREFIX_LINKLOCAL(dst, rtm->rtm_dst_len)) + continue; + if (rtm->rtm_dst_len == 0) { /* Default route */ ndef++; @@ -322,7 +335,7 @@ unsigned int nl_get_ext_if(int s, sa_family_t af) } if (!nany) - info("No interfaces with %s routes", af_name(af)); + info("No interfaces with usable %s routes", af_name(af)); return 0; } |