diff options
Diffstat (limited to 'src/ndp.c')
| -rw-r--r-- | src/ndp.c | 25 |
1 files changed, 23 insertions, 2 deletions
@@ -38,10 +38,11 @@ static void handle_solicit(void *addr, void *data, size_t len, struct interface *iface, void *dest); static void handle_rtnetlink(void *addr, void *data, size_t len, struct interface *iface, void *dest); +static void catch_rtnetlink(int error); static uint32_t rtnl_seqid = 0; static int ping_socket = -1; -static struct odhcpd_event rtnl_event = {{.fd = -1}, handle_rtnetlink}; +static struct odhcpd_event rtnl_event = {{.fd = -1}, handle_rtnetlink, catch_rtnetlink}; // Filter ICMPv6 messages of type neighbor soliciation @@ -60,10 +61,15 @@ static const struct sock_fprog bpf_prog = {sizeof(bpf) / sizeof(*bpf), bpf}; // Initialize NDP-proxy int init_ndp(void) { + int val = 256 * 1024; + // Setup netlink socket if ((rtnl_event.uloop.fd = odhcpd_open_rtnl()) < 0) return -1; + if (setsockopt(rtnl_event.uloop.fd, SOL_SOCKET, SO_RCVBUF, &val, sizeof(val))) + setsockopt(rtnl_event.uloop.fd, SOL_SOCKET, SO_RCVBUFFORCE, &val, sizeof(val)); + // Receive netlink neighbor and ip-address events uint32_t group = RTNLGRP_IPV6_IFADDR; setsockopt(rtnl_event.uloop.fd, SOL_NETLINK, @@ -81,7 +87,7 @@ int init_ndp(void) return -1; } - int val = 2; + val = 2; setsockopt(ping_socket, IPPROTO_RAW, IPV6_CHECKSUM, &val, sizeof(val)); // This is required by RFC 4861 @@ -491,3 +497,18 @@ static void handle_rtnetlink(_unused void *addr, void *data, size_t len, if (dump_neigh) dump_neigh_table(false); } + +static void catch_rtnetlink(int error) +{ + if (error == ENOBUFS) { + struct { + struct nlmsghdr nh; + struct ifaddrmsg ifa; + } req2 = { + {sizeof(req2), RTM_GETADDR, NLM_F_REQUEST | NLM_F_DUMP, + ++rtnl_seqid, 0}, + {.ifa_family = AF_INET6} + }; + send(rtnl_event.uloop.fd, &req2, sizeof(req2), MSG_DONTWAIT); + } +} |