close(fd);
}
+enum {
+ RULE_F_ADD = (1 << 0),
+ RULE_F_DEFGW_WORKAROUND = (1 << 1),
+};
+
+static void
+rtnl_rule_request(struct relayd_interface *rif, int flags)
+{
+ static struct {
+ struct nlmsghdr nl;
+ struct rtmsg rt;
+ struct {
+ struct rtattr rta;
+ int table;
+ } __packed table;
+ struct {
+ struct rtattr rta;
+ char ifname[IFNAMSIZ + 1];
+ } __packed dev;
+ } __packed req = {
+ .rt = {
+ .rtm_family = AF_INET,
+ .rtm_table = RT_TABLE_UNSPEC,
+ .rtm_scope = RT_SCOPE_UNIVERSE,
+ .rtm_protocol = RTPROT_BOOT,
+ },
+ .table.rta = {
+ .rta_type = FRA_TABLE,
+ .rta_len = sizeof(req.table),
+ },
+ };
+
+ int padding = sizeof(req.dev.ifname);
+
+ if (!(flags & RULE_F_DEFGW_WORKAROUND)) {
+ req.dev.rta.rta_type = FRA_IFNAME;
+ padding -= strlen(rif->ifname) + 1;
+ strcpy(req.dev.ifname, rif->ifname);
+ req.dev.rta.rta_len = sizeof(req.dev.rta) + strlen(rif->ifname) + 1;
+ } else {
+ req.dev.rta.rta_type = FRA_PRIORITY;
+ req.dev.rta.rta_len = sizeof(req.dev.rta) + sizeof(uint32_t);
+ padding -= sizeof(uint32_t);
+ *((uint32_t *) &req.dev.ifname) = 1;
+ }
+ req.table.table = rif->rt_table;
+ req.nl.nlmsg_len = sizeof(req) - padding;
+
+ req.nl.nlmsg_flags = NLM_F_REQUEST;
+ if (flags & RULE_F_ADD) {
+ req.nl.nlmsg_type = RTM_NEWRULE;
+ req.nl.nlmsg_flags |= NLM_F_CREATE | NLM_F_EXCL;
+
+ req.rt.rtm_type = RTN_UNICAST;
+ } else {
+ req.nl.nlmsg_type = RTM_DELRULE;
+ req.rt.rtm_type = RTN_UNSPEC;
+ }
+
+ send(rtnl_sock.fd, &req, req.nl.nlmsg_len, 0);
+ rtnl_flush();
+}
+
+
static void
rtnl_route_request(struct relayd_interface *rif, struct relayd_host *host,
struct relayd_route *route, bool add)
}
req.nl.nlmsg_len = pktlen;
+ if (route)
+ rtnl_rule_request(rif, RULE_F_DEFGW_WORKAROUND | RULE_F_ADD);
send(rtnl_sock.fd, &req, pktlen, 0);
- rtnl_flush();
-}
-
-static void rtnl_rule_request(struct relayd_interface *rif, bool add)
-{
- static struct {
- struct nlmsghdr nl;
- struct rtmsg rt;
- struct {
- struct rtattr rta;
- int table;
- } __packed table;
- struct {
- struct rtattr rta;
- char ifname[IFNAMSIZ + 1];
- } __packed dev;
- } __packed req = {
- .rt = {
- .rtm_family = AF_INET,
- .rtm_table = RT_TABLE_UNSPEC,
- .rtm_scope = RT_SCOPE_UNIVERSE,
- .rtm_protocol = RTPROT_BOOT,
- },
- .table.rta = {
- .rta_type = FRA_TABLE,
- .rta_len = sizeof(req.table),
- },
- .dev.rta = {
- .rta_type = FRA_IFNAME,
- },
- };
-
- int padding = sizeof(req.dev.ifname);
- padding -= strlen(rif->ifname) + 1;
-
- strcpy(req.dev.ifname, rif->ifname);
- req.dev.rta.rta_len = sizeof(req.dev.rta) + strlen(rif->ifname) + 1;
- req.table.table = rif->rt_table;
- req.nl.nlmsg_len = sizeof(req) - padding;
-
- req.nl.nlmsg_flags = NLM_F_REQUEST;
- if (add) {
- req.nl.nlmsg_type = RTM_NEWRULE;
- req.nl.nlmsg_flags |= NLM_F_CREATE | NLM_F_EXCL;
-
- req.rt.rtm_type = RTN_UNICAST;
- } else {
- req.nl.nlmsg_type = RTM_DELRULE;
- req.rt.rtm_type = RTN_UNSPEC;
- }
-
- send(rtnl_sock.fd, &req, req.nl.nlmsg_len, 0);
+ if (route)
+ rtnl_rule_request(rif, RULE_F_DEFGW_WORKAROUND);
rtnl_flush();
}
void relayd_add_interface_routes(struct relayd_interface *rif)
{
rif->rt_table = route_table++;
- rtnl_rule_request(rif, true);
+ rtnl_rule_request(rif, RULE_F_ADD);
}
void relayd_del_interface_routes(struct relayd_interface *rif)
{
- rtnl_rule_request(rif, false);
+ rtnl_rule_request(rif, 0);
}
#ifndef NDA_RTA
} while (1);
}
-int relayd_rtnl_init(void)
+static void rtnl_dump_request(int nlmsg_type)
{
- struct sockaddr_nl snl_local;
static struct {
struct nlmsghdr nlh;
struct rtgenmsg g;
} req = {
.nlh = {
.nlmsg_len = sizeof(req),
- .nlmsg_type = RTM_GETNEIGH,
.nlmsg_flags = NLM_F_ROOT|NLM_F_MATCH|NLM_F_REQUEST,
.nlmsg_pid = 0,
},
.g.rtgen_family = AF_INET,
};
+ req.nlh.nlmsg_type = nlmsg_type;
+ req.nlh.nlmsg_seq = rtnl_seq;
+ send(rtnl_sock.fd, &req, sizeof(req), 0);
+ rtnl_seq++;
+}
+
+int relayd_rtnl_init(void)
+{
+ struct sockaddr_nl snl_local;
rtnl_sock.fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
if (rtnl_sock.fd < 0) {
rtnl_seq = time(NULL);
rtnl_dump_seq = rtnl_seq;
- req.nlh.nlmsg_seq = rtnl_seq;
- send(rtnl_sock.fd, &req, sizeof(req), 0);
+ rtnl_dump_request(RTM_GETNEIGH);
return 0;
}