diff options
Diffstat (limited to 'src/network/networkd-manager.c')
| -rw-r--r-- | src/network/networkd-manager.c | 235 |
1 files changed, 234 insertions, 1 deletions
diff --git a/src/network/networkd-manager.c b/src/network/networkd-manager.c index 6b2a661ca7..a5701001c1 100644 --- a/src/network/networkd-manager.c +++ b/src/network/networkd-manager.c @@ -279,6 +279,196 @@ static int manager_connect_udev(Manager *m) { return 0; } +int manager_rtnl_process_route(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) { + Manager *m = userdata; + Link *link = NULL; + uint16_t type; + uint32_t ifindex, priority = 0; + unsigned char protocol, scope, tos, table; + int family; + unsigned char dst_prefixlen, src_prefixlen; + union in_addr_union dst = {}, gw = {}, src = {}, prefsrc = {}; + Route *route = NULL; + int r; + + assert(rtnl); + assert(message); + assert(m); + + if (sd_netlink_message_is_error(message)) { + r = sd_netlink_message_get_errno(message); + if (r < 0) + log_warning_errno(r, "rtnl: failed to receive route: %m"); + + return 0; + } + + r = sd_netlink_message_get_type(message, &type); + if (r < 0) { + log_warning_errno(r, "rtnl: could not get message type: %m"); + return 0; + } else if (type != RTM_NEWROUTE && type != RTM_DELROUTE) { + log_warning("rtnl: received unexpected message type when processing route"); + return 0; + } + + r = sd_netlink_message_read_u32(message, RTA_OIF, &ifindex); + if (r == -ENODATA) { + log_debug("rtnl: received route without ifindex, ignoring"); + return 0; + } else if (r < 0) { + log_warning_errno(r, "rtnl: could not get ifindex from route, ignoring: %m"); + return 0; + } else if (ifindex <= 0) { + log_warning("rtnl: received route message with invalid ifindex, ignoring: %d", ifindex); + return 0; + } else { + r = link_get(m, ifindex, &link); + if (r < 0 || !link) { + /* when enumerating we might be out of sync, but we will + * get the route again, so just ignore it */ + if (!m->enumerating) + log_warning("rtnl: received route for nonexistent link (%d), ignoring", ifindex); + return 0; + } + } + + r = sd_rtnl_message_route_get_family(message, &family); + if (r < 0 || !IN_SET(family, AF_INET, AF_INET6)) { + log_link_warning(link, "rtnl: received address with invalid family, ignoring."); + return 0; + } + + r = sd_rtnl_message_route_get_protocol(message, &protocol); + if (r < 0) { + log_warning_errno(r, "rtnl: could not get route protocol: %m"); + return 0; + } + + switch (family) { + case AF_INET: + r = sd_netlink_message_read_in_addr(message, RTA_DST, &dst.in); + if (r < 0 && r != -ENODATA) { + log_link_warning_errno(link, r, "rtnl: received route without valid destination, ignoring: %m"); + return 0; + } + + r = sd_netlink_message_read_in_addr(message, RTA_GATEWAY, &gw.in); + if (r < 0 && r != -ENODATA) { + log_link_warning_errno(link, r, "rtnl: received route with invalid gateway, ignoring: %m"); + return 0; + } + + r = sd_netlink_message_read_in_addr(message, RTA_SRC, &src.in); + if (r < 0 && r != -ENODATA) { + log_link_warning_errno(link, r, "rtnl: received route with invalid source, ignoring: %m"); + return 0; + } + + r = sd_netlink_message_read_in_addr(message, RTA_PREFSRC, &prefsrc.in); + if (r < 0 && r != -ENODATA) { + log_link_warning_errno(link, r, "rtnl: received route with invalid preferred source, ignoring: %m"); + return 0; + } + + break; + + case AF_INET6: + r = sd_netlink_message_read_in6_addr(message, RTA_DST, &dst.in6); + if (r < 0 && r != -ENODATA) { + log_link_warning_errno(link, r, "rtnl: received route without valid destination, ignoring: %m"); + return 0; + } + + r = sd_netlink_message_read_in6_addr(message, RTA_GATEWAY, &gw.in6); + if (r < 0 && r != -ENODATA) { + log_link_warning_errno(link, r, "rtnl: received route with invalid gateway, ignoring: %m"); + return 0; + } + + r = sd_netlink_message_read_in6_addr(message, RTA_SRC, &src.in6); + if (r < 0 && r != -ENODATA) { + log_link_warning_errno(link, r, "rtnl: received route with invalid source, ignoring: %m"); + return 0; + } + + r = sd_netlink_message_read_in6_addr(message, RTA_PREFSRC, &prefsrc.in6); + if (r < 0 && r != -ENODATA) { + log_link_warning_errno(link, r, "rtnl: received route with invalid preferred source, ignoring: %m"); + return 0; + } + + break; + + default: + log_link_debug(link, "rtnl: ignoring unsupported address family: %d", family); + return 0; + } + + r = sd_rtnl_message_route_get_dst_prefixlen(message, &dst_prefixlen); + if (r < 0) { + log_link_warning_errno(link, r, "rtnl: received route with invalid destination prefixlen, ignoring: %m"); + return 0; + } + + r = sd_rtnl_message_route_get_src_prefixlen(message, &src_prefixlen); + if (r < 0) { + log_link_warning_errno(link, r, "rtnl: received route with invalid source prefixlen, ignoring: %m"); + return 0; + } + + r = sd_rtnl_message_route_get_scope(message, &scope); + if (r < 0) { + log_link_warning_errno(link, r, "rtnl: received route with invalid scope, ignoring: %m"); + return 0; + } + + r = sd_rtnl_message_route_get_tos(message, &tos); + if (r < 0) { + log_link_warning_errno(link, r, "rtnl: received route with invalid tos, ignoring: %m"); + return 0; + } + + r = sd_rtnl_message_route_get_table(message, &table); + if (r < 0) { + log_link_warning_errno(link, r, "rtnl: received route with invalid table, ignoring: %m"); + return 0; + } + + r = sd_netlink_message_read_u32(message, RTA_PRIORITY, &priority); + if (r < 0 && r != -ENODATA) { + log_link_warning_errno(link, r, "rtnl: received route with invalid priority, ignoring: %m"); + return 0; + } + + route_get(link, family, &dst, dst_prefixlen, tos, priority, table, &route); + + switch (type) { + case RTM_NEWROUTE: + if (!route) { + /* A route appeared that we did not request */ + r = route_add_foreign(link, family, &dst, dst_prefixlen, tos, priority, table, &route); + if (r < 0) + return 0; + } + + route_update(route, &src, src_prefixlen, &gw, &prefsrc, scope, protocol); + + break; + + case RTM_DELROUTE: + + if (route) + route_drop(route); + + break; + default: + assert_not_reached("Received invalid RTNL message type"); + } + + return 1; +} + int manager_rtnl_process_address(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) { Manager *m = userdata; Link *link = NULL; @@ -377,7 +567,7 @@ int manager_rtnl_process_address(sd_netlink *rtnl, sd_netlink_message *message, break; default: - assert_not_reached("invalid address family"); + log_link_debug(link, "rtnl: ignoring unsupported address family: %d", family); } if (!inet_ntop(family, &in_addr, buf, INET6_ADDRSTRLEN)) { @@ -572,6 +762,14 @@ static int manager_connect_rtnl(Manager *m) { if (r < 0) return r; + r = sd_netlink_add_match(m->rtnl, RTM_NEWROUTE, &manager_rtnl_process_route, m); + if (r < 0) + return r; + + r = sd_netlink_add_match(m->rtnl, RTM_DELROUTE, &manager_rtnl_process_route, m); + if (r < 0) + return r; + return 0; } @@ -1019,6 +1217,41 @@ int manager_rtnl_enumerate_addresses(Manager *m) { return r; } +int manager_rtnl_enumerate_routes(Manager *m) { + _cleanup_netlink_message_unref_ sd_netlink_message *req = NULL, *reply = NULL; + sd_netlink_message *route; + int r; + + assert(m); + assert(m->rtnl); + + r = sd_rtnl_message_new_route(m->rtnl, &req, RTM_GETROUTE, 0, 0); + if (r < 0) + return r; + + r = sd_netlink_message_request_dump(req, true); + if (r < 0) + return r; + + r = sd_netlink_call(m->rtnl, req, 0, &reply); + if (r < 0) + return r; + + for (route = reply; route; route = sd_netlink_message_next(route)) { + int k; + + m->enumerating = true; + + k = manager_rtnl_process_route(m->rtnl, route, m); + if (k < 0) + r = k; + + m->enumerating = false; + } + + return r; +} + int manager_address_pool_acquire(Manager *m, int family, unsigned prefixlen, union in_addr_union *found) { AddressPool *p; int r; |