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-rw-r--r--src/ndp.c95
1 files changed, 11 insertions, 84 deletions
diff --git a/src/ndp.c b/src/ndp.c
index b5bab27..d5e9a39 100644
--- a/src/ndp.c
+++ b/src/ndp.c
@@ -37,8 +37,6 @@ 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 ssize_t ping6(struct in6_addr *addr,
- const struct interface *iface);
static uint32_t rtnl_seqid = 0;
static int ping_socket = -1;
@@ -209,13 +207,16 @@ int setup_ndp_interface(struct interface *iface, bool enable)
// Send an ICMP-ECHO. This is less for actually pinging but for the
// neighbor cache to be kept up-to-date.
-static ssize_t ping6(struct in6_addr *addr,
+static void ping6(struct in6_addr *addr,
const struct interface *iface)
{
struct sockaddr_in6 dest = {AF_INET6, 0, 0, *addr, iface->ifindex};
struct icmp6_hdr echo = {.icmp6_type = ICMP6_ECHO_REQUEST};
struct iovec iov = {&echo, sizeof(echo)};
- return odhcpd_send(ping_socket, &dest, &iov, 1, iface);
+
+ odhcpd_setup_route(addr, 128, iface, NULL, 128, true);
+ odhcpd_send(ping_socket, &dest, &iov, 1, iface);
+ odhcpd_setup_route(addr, 128, iface, NULL, 128, false);
}
@@ -259,52 +260,6 @@ static void handle_solicit(void *addr, void *data, size_t len,
ping6(&req->nd_ns_target, c);
}
-
-void odhcpd_setup_route(const struct in6_addr *addr, int prefixlen,
- const struct interface *iface, const struct in6_addr *gw, bool add)
-{
- struct req {
- struct nlmsghdr nh;
- struct rtmsg rtm;
- struct rtattr rta_dst;
- struct in6_addr dst_addr;
- struct rtattr rta_oif;
- uint32_t ifindex;
- struct rtattr rta_table;
- uint32_t table;
- struct rtattr rta_gw;
- struct in6_addr gw;
- } req = {
- {sizeof(req), 0, NLM_F_REQUEST, ++rtnl_seqid, 0},
- {AF_INET6, prefixlen, 0, 0, 0, 0, 0, 0, 0},
- {sizeof(struct rtattr) + sizeof(struct in6_addr), RTA_DST},
- *addr,
- {sizeof(struct rtattr) + sizeof(uint32_t), RTA_OIF},
- iface->ifindex,
- {sizeof(struct rtattr) + sizeof(uint32_t), RTA_TABLE},
- RT_TABLE_MAIN,
- {sizeof(struct rtattr) + sizeof(struct in6_addr), RTA_GATEWAY},
- IN6ADDR_ANY_INIT,
- };
-
- if (gw)
- req.gw = *gw;
-
- if (add) {
- req.nh.nlmsg_type = RTM_NEWROUTE;
- req.nh.nlmsg_flags |= (NLM_F_CREATE | NLM_F_REPLACE);
- req.rtm.rtm_protocol = RTPROT_STATIC;
- req.rtm.rtm_scope = (gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
- req.rtm.rtm_type = RTN_UNICAST;
- } else {
- req.nh.nlmsg_type = RTM_DELROUTE;
- req.rtm.rtm_scope = RT_SCOPE_NOWHERE;
- }
-
- req.nh.nlmsg_len = (gw) ? sizeof(req) : offsetof(struct req, rta_gw);
- send(rtnl_event.uloop.fd, &req, req.nh.nlmsg_len, MSG_DONTWAIT);
-}
-
// Use rtnetlink to modify kernel routes
static void setup_route(struct in6_addr *addr, struct interface *iface, bool add)
{
@@ -314,7 +269,7 @@ static void setup_route(struct in6_addr *addr, struct interface *iface, bool add
(add) ? "Learned" : "Forgot", namebuf, iface->ifname);
if (iface->learn_routes)
- odhcpd_setup_route(addr, 128, iface, NULL, add);
+ odhcpd_setup_route(addr, 128, iface, NULL, 1024, add);
}
@@ -347,36 +302,25 @@ static void handle_rtnetlink(_unused void *addr, void *data, size_t len,
// Inform about a change in default route
if (is_route && rtm->rtm_dst_len == 0)
raise(SIGUSR1);
- else if (is_route && rtm->rtm_dst_len == 128)
+ else if (is_route)
continue;
// Data to retrieve
- size_t rta_offset = (is_route) ? sizeof(*rtm) : (is_addr) ?
- sizeof(struct ifaddrmsg) : sizeof(*ndm);
- uint16_t atype = (is_route) ? RTA_DST : (is_addr) ? IFA_ADDRESS : NDA_DST;
+ size_t rta_offset = (is_addr) ? sizeof(struct ifaddrmsg) : sizeof(*ndm);
+ uint16_t atype = (is_addr) ? IFA_ADDRESS : NDA_DST;
ssize_t alen = NLMSG_PAYLOAD(nh, rta_offset);
struct in6_addr *addr = NULL;
- int *ifindex = (!is_route) ? &ndm->ndm_ifindex : NULL;
- int *metric = NULL;
for (struct rtattr *rta = (void*)(((uint8_t*)ndm) + rta_offset);
RTA_OK(rta, alen); rta = RTA_NEXT(rta, alen)) {
if (rta->rta_type == atype &&
RTA_PAYLOAD(rta) >= sizeof(*addr)) {
addr = RTA_DATA(rta);
- } else if (is_route && rta->rta_type == RTA_OIF &&
- RTA_PAYLOAD(rta) == sizeof(int)) {
- ifindex = (int*)RTA_DATA(rta);
- } else if (is_route && rta->rta_type == RTA_GATEWAY) {
- ifindex = NULL;
- break;
- } else if (is_route && rta->rta_type == RTA_PRIORITY) {
- metric = (int*)RTA_DATA(rta);
}
}
// Lookup interface
- struct interface *iface = ifindex ? odhcpd_get_interface_by_index(*ifindex) : NULL;
+ struct interface *iface = odhcpd_get_interface_by_index(ndm->ndm_ifindex);
if (!iface)
continue;
@@ -399,7 +343,7 @@ static void handle_rtnetlink(_unused void *addr, void *data, size_t len,
(NUD_REACHABLE | NUD_STALE | NUD_DELAY | NUD_PROBE
| NUD_PERMANENT | NUD_NOARP)));
- if (iface->ndp == RELAYD_RELAY && !is_route) {
+ if (iface->ndp == RELAYD_RELAY) {
// Replay change to all neighbor cache
struct {
struct nlmsghdr nh;
@@ -478,23 +422,6 @@ static void handle_rtnetlink(_unused void *addr, void *data, size_t len,
if (iface->dhcpv6 == RELAYD_SERVER)
iface->ia_reconf = true;
- } else if (is_route) {
- if (iface->ndp == RELAYD_RELAY && iface->master) {
- // Replay on-link route changes on all slave interfaces
- nh->nlmsg_flags = NLM_F_REQUEST;
-
- if (nh->nlmsg_type == RTM_NEWROUTE)
- nh->nlmsg_flags |= NLM_F_CREATE | NLM_F_REPLACE;
-
- struct interface *c;
- list_for_each_entry(c, &interfaces, head) {
- if (c->ndp == RELAYD_RELAY && !c->master) {
- *ifindex = c->ifindex;
- *metric = (*metric & 0xffff) | (c->ifindex << 16);
- send(rtnl_event.uloop.fd, nh, nh->nlmsg_len, MSG_DONTWAIT);
- }
- }
- }
}
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-30 03:19:11 +0000