#include "parse-util.h"
#include "string-util.h"
+static int append_nexthop_one(Link *link, const Route *route, const MultipathRoute *m, struct rtattr **rta, size_t offset) {
+ struct rtnexthop *rtnh;
+ struct rtattr *new_rta;
+ int r;
+
+ assert(route);
+ assert(IN_SET(route->family, AF_INET, AF_INET6));
+ assert(m);
+ assert(rta);
+ assert(*rta);
+ assert(m->ifindex > 0 || link);
+
+ new_rta = realloc(*rta, RTA_ALIGN((*rta)->rta_len) + RTA_SPACE(sizeof(struct rtnexthop)));
+ if (!new_rta)
+ return -ENOMEM;
+ *rta = new_rta;
+
+ rtnh = (struct rtnexthop *)((uint8_t *) *rta + offset);
+ *rtnh = (struct rtnexthop) {
+ .rtnh_len = sizeof(*rtnh),
+ .rtnh_ifindex = m->ifindex > 0 ? m->ifindex : link->ifindex,
+ .rtnh_hops = m->weight,
+ };
+
+ (*rta)->rta_len += sizeof(struct rtnexthop);
+
+ if (m->gateway.family == route->family) {
+ r = rtattr_append_attribute(rta, RTA_GATEWAY, &m->gateway.address, FAMILY_ADDRESS_SIZE(m->gateway.family));
+ if (r < 0)
+ goto clear;
+
+ rtnh = (struct rtnexthop *)((uint8_t *) *rta + offset);
+ rtnh->rtnh_len += RTA_SPACE(FAMILY_ADDRESS_SIZE(m->gateway.family));
+
+ } else if (m->gateway.family == AF_INET6) {
+ assert(route->family == AF_INET);
+
+ r = rtattr_append_attribute(rta, RTA_VIA, &m->gateway, sizeof(RouteVia));
+ if (r < 0)
+ goto clear;
+
+ rtnh = (struct rtnexthop *)((uint8_t *) *rta + offset);
+ rtnh->rtnh_len += RTA_SPACE(sizeof(RouteVia));
+
+ } else if (m->gateway.family == AF_INET)
+ assert_not_reached();
+
+ return 0;
+
+clear:
+ (*rta)->rta_len -= sizeof(struct rtnexthop);
+ return r;
+}
+
+static int netlink_message_append_multipath_route(Link *link, const Route *route, sd_netlink_message *message) {
+ _cleanup_free_ struct rtattr *rta = NULL;
+ size_t offset;
+ int r;
+
+ assert(route);
+ assert(message);
+
+ if (ordered_set_isempty(route->multipath_routes))
+ return 0;
+
+ rta = new(struct rtattr, 1);
+ if (!rta)
+ return -ENOMEM;
+
+ *rta = (struct rtattr) {
+ .rta_type = RTA_MULTIPATH,
+ .rta_len = RTA_LENGTH(0),
+ };
+ offset = (uint8_t *) RTA_DATA(rta) - (uint8_t *) rta;
+
+ MultipathRoute *m;
+ ORDERED_SET_FOREACH(m, route->multipath_routes) {
+ struct rtnexthop *rtnh;
+
+ r = append_nexthop_one(link, route, m, &rta, offset);
+ if (r < 0)
+ return r;
+
+ rtnh = (struct rtnexthop *)((uint8_t *) rta + offset);
+ offset = (uint8_t *) RTNH_NEXT(rtnh) - (uint8_t *) rta;
+ }
+
+ return sd_netlink_message_append_data(message, RTA_MULTIPATH, RTA_DATA(rta), RTA_PAYLOAD(rta));
+}
+
+int route_nexthops_set_netlink_message(Link *link, const Route *route, sd_netlink_message *message) {
+ int r;
+
+ assert(route);
+ assert(IN_SET(route->family, AF_INET, AF_INET6));
+ assert(message);
+
+ if (route->nexthop_id != 0)
+ return sd_netlink_message_append_u32(message, RTA_NH_ID, route->nexthop_id);
+
+ if (route_type_is_reject(route))
+ return 0;
+
+ if (ordered_set_isempty(route->multipath_routes)) {
+
+ if (in_addr_is_set(route->gw_family, &route->gw)) {
+ if (route->gw_family == route->family)
+ r = netlink_message_append_in_addr_union(message, RTA_GATEWAY, route->gw_family, &route->gw);
+ else {
+ assert(route->family == AF_INET);
+ r = sd_netlink_message_append_data(message, RTA_VIA,
+ &(const RouteVia) {
+ .family = route->gw_family,
+ .address = route->gw,
+ }, sizeof(RouteVia));
+ }
+ if (r < 0)
+ return r;
+ }
+
+ assert(link);
+ return sd_netlink_message_append_u32(message, RTA_OIF, link->ifindex);
+ }
+
+ return netlink_message_append_multipath_route(link, route, message);
+}
+
+int route_nexthops_read_netlink_message(Route *route, sd_netlink_message *message) {
+ int r;
+
+ assert(route);
+ assert(message);
+
+ r = sd_netlink_message_read_u32(message, RTA_NH_ID, &route->nexthop_id);
+ if (r < 0 && r != -ENODATA)
+ return log_warning_errno(r, "rtnl: received route message with invalid nexthop id, ignoring: %m");
+
+ if (route->nexthop_id != 0 || route_type_is_reject(route))
+ /* IPv6 routes with reject type are always assigned to the loopback interface. See kernel's
+ * fib6_nh_init() in net/ipv6/route.c. However, we'd like to make it consistent with IPv4
+ * routes. Hence, skip reading of RTA_OIF. */
+ return 0;
+
+ uint32_t ifindex = 0;
+ r = sd_netlink_message_read_u32(message, RTA_OIF, &ifindex);
+ if (r < 0 && r != -ENODATA)
+ return log_warning_errno(r, "rtnl: could not get ifindex from route message, ignoring: %m");
+
+ if (ifindex > 0) {
+ r = netlink_message_read_in_addr_union(message, RTA_GATEWAY, route->family, &route->gw);
+ if (r >= 0) {
+ route->gw_family = route->family;
+ return 0;
+ }
+ if (r != -ENODATA)
+ return log_warning_errno(r, "rtnl: received route message without valid gateway, ignoring: %m");
+
+ if (route->family != AF_INET)
+ return 0;
+
+ RouteVia via;
+ r = sd_netlink_message_read(message, RTA_VIA, sizeof(via), &via);
+ if (r >= 0) {
+ route->gw_family = via.family;
+ route->gw = via.address;
+ return 0;
+ }
+ if (r != -ENODATA)
+ return log_warning_errno(r, "rtnl: received route message without valid gateway, ignoring: %m");
+
+ return 0;
+ }
+
+ size_t rta_len;
+ _cleanup_free_ void *rta = NULL;
+ r = sd_netlink_message_read_data(message, RTA_MULTIPATH, &rta_len, &rta);
+ if (r == -ENODATA)
+ return 0;
+ if (r < 0)
+ return log_warning_errno(r, "rtnl: failed to read RTA_MULTIPATH attribute, ignoring: %m");
+
+ r = rtattr_read_nexthop(rta, rta_len, route->family, &route->multipath_routes);
+ if (r < 0)
+ return log_warning_errno(r, "rtnl: failed to parse RTA_MULTIPATH attribute, ignoring: %m");
+
+ return 0;
+}
+
int route_section_verify_nexthops(Route *route) {
assert(route);
assert(route->section);
/* link may be NULL */
- if (in_addr_is_set(route->gw_family, &route->gw) && route->nexthop_id == 0) {
- if (route->gw_family == route->family) {
- r = netlink_message_append_in_addr_union(req, RTA_GATEWAY, route->gw_family, &route->gw);
- if (r < 0)
- return r;
- } else {
- RouteVia rtvia = {
- .family = route->gw_family,
- .address = route->gw,
- };
-
- r = sd_netlink_message_append_data(req, RTA_VIA, &rtvia, sizeof(rtvia));
- if (r < 0)
- return r;
- }
- }
-
if (route->dst_prefixlen > 0) {
r = netlink_message_append_in_addr_union(req, RTA_DST, route->family, &route->dst);
if (r < 0)
return r;
}
- if (!route_type_is_reject(route) &&
- route->nexthop_id == 0 &&
- ordered_set_isempty(route->multipath_routes)) {
- assert(link); /* Those routes must be attached to a specific link */
-
- r = sd_netlink_message_append_u32(req, RTA_OIF, link->ifindex);
- if (r < 0)
- return r;
- }
-
- if (route->nexthop_id > 0) {
- r = sd_netlink_message_append_u32(req, RTA_NH_ID, route->nexthop_id);
- if (r < 0)
- return r;
- }
-
r = sd_netlink_message_append_u8(req, RTA_PREF, route->pref);
if (r < 0)
return r;
if (r < 0)
return r;
+ /* nexthops */
+ r = route_nexthops_set_netlink_message(link, route, req);
+ if (r < 0)
+ return r;
+
return 0;
}
return 1;
}
-static int append_nexthop_one(const Link *link, const Route *route, const MultipathRoute *m, struct rtattr **rta, size_t offset) {
- struct rtnexthop *rtnh;
- struct rtattr *new_rta;
- int r;
-
- assert(route);
- assert(m);
- assert(rta);
- assert(*rta);
-
- new_rta = realloc(*rta, RTA_ALIGN((*rta)->rta_len) + RTA_SPACE(sizeof(struct rtnexthop)));
- if (!new_rta)
- return -ENOMEM;
- *rta = new_rta;
-
- rtnh = (struct rtnexthop *)((uint8_t *) *rta + offset);
- *rtnh = (struct rtnexthop) {
- .rtnh_len = sizeof(*rtnh),
- .rtnh_ifindex = m->ifindex > 0 ? m->ifindex : link->ifindex,
- .rtnh_hops = m->weight,
- };
-
- (*rta)->rta_len += sizeof(struct rtnexthop);
-
- if (route->family == m->gateway.family) {
- r = rtattr_append_attribute(rta, RTA_GATEWAY, &m->gateway.address, FAMILY_ADDRESS_SIZE(m->gateway.family));
- if (r < 0)
- goto clear;
- rtnh = (struct rtnexthop *)((uint8_t *) *rta + offset);
- rtnh->rtnh_len += RTA_SPACE(FAMILY_ADDRESS_SIZE(m->gateway.family));
- } else {
- r = rtattr_append_attribute(rta, RTA_VIA, &m->gateway, FAMILY_ADDRESS_SIZE(m->gateway.family) + sizeof(m->gateway.family));
- if (r < 0)
- goto clear;
- rtnh = (struct rtnexthop *)((uint8_t *) *rta + offset);
- rtnh->rtnh_len += RTA_SPACE(FAMILY_ADDRESS_SIZE(m->gateway.family) + sizeof(m->gateway.family));
- }
-
- return 0;
-
-clear:
- (*rta)->rta_len -= sizeof(struct rtnexthop);
- return r;
-}
-
-static int append_nexthops(const Link *link, const Route *route, sd_netlink_message *req) {
- _cleanup_free_ struct rtattr *rta = NULL;
- struct rtnexthop *rtnh;
- MultipathRoute *m;
- size_t offset;
- int r;
-
- assert(link);
- assert(route);
- assert(req);
-
- if (ordered_set_isempty(route->multipath_routes))
- return 0;
-
- rta = new(struct rtattr, 1);
- if (!rta)
- return -ENOMEM;
-
- *rta = (struct rtattr) {
- .rta_type = RTA_MULTIPATH,
- .rta_len = RTA_LENGTH(0),
- };
- offset = (uint8_t *) RTA_DATA(rta) - (uint8_t *) rta;
-
- ORDERED_SET_FOREACH(m, route->multipath_routes) {
- r = append_nexthop_one(link, route, m, &rta, offset);
- if (r < 0)
- return r;
-
- rtnh = (struct rtnexthop *)((uint8_t *) rta + offset);
- offset = (uint8_t *) RTNH_NEXT(rtnh) - (uint8_t *) rta;
- }
-
- r = sd_netlink_message_append_data(req, RTA_MULTIPATH, RTA_DATA(rta), RTA_PAYLOAD(rta));
- if (r < 0)
- return r;
-
- return 0;
-}
-
int route_configure_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, Route *route, const char *error_msg) {
int r;
if (r < 0)
return r;
- if (!ordered_set_isempty(route->multipath_routes)) {
- assert(route->nexthop_id == 0);
- assert(!in_addr_is_set(route->gw_family, &route->gw));
-
- r = append_nexthops(link, route, m);
- if (r < 0)
- return r;
- }
-
return request_call_netlink_async(link->manager->rtnl, m, req);
}
int manager_rtnl_process_route(sd_netlink *rtnl, sd_netlink_message *message, Manager *m) {
_cleanup_(converted_routes_freep) ConvertedRoutes *converted = NULL;
_cleanup_(route_freep) Route *tmp = NULL;
- _cleanup_free_ void *rta_multipath = NULL;
struct rta_cacheinfo cacheinfo;
bool has_cacheinfo;
Link *link = NULL;
uint32_t ifindex;
uint16_t type;
- size_t rta_len;
int r;
assert(rtnl);
return 0;
}
- r = netlink_message_read_in_addr_union(message, RTA_GATEWAY, tmp->family, &tmp->gw);
- if (r < 0 && r != -ENODATA) {
- log_link_warning_errno(link, r, "rtnl: received route message without valid gateway, ignoring: %m");
- return 0;
- } else if (r >= 0)
- tmp->gw_family = tmp->family;
- else if (tmp->family == AF_INET) {
- RouteVia via;
-
- r = sd_netlink_message_read(message, RTA_VIA, sizeof(via), &via);
- if (r < 0 && r != -ENODATA) {
- log_link_warning_errno(link, r, "rtnl: received route message without valid gateway, ignoring: %m");
- return 0;
- } else if (r >= 0) {
- tmp->gw_family = via.family;
- tmp->gw = via.address;
- }
- }
-
r = netlink_message_read_in_addr_union(message, RTA_SRC, tmp->family, &tmp->src);
if (r < 0 && r != -ENODATA) {
log_link_warning_errno(link, r, "rtnl: received route message without valid source, ignoring: %m");
return 0;
}
- r = sd_netlink_message_read_u32(message, RTA_NH_ID, &tmp->nexthop_id);
- if (r < 0 && r != -ENODATA) {
- log_link_warning_errno(link, r, "rtnl: received route message with invalid nexthop id, ignoring: %m");
+ /* nexthops */
+ if (route_nexthops_read_netlink_message(tmp, message) < 0)
return 0;
- }
/* metrics */
if (route_metric_read_netlink_message(&tmp->metric, message) < 0)
return 0;
- r = sd_netlink_message_read_data(message, RTA_MULTIPATH, &rta_len, &rta_multipath);
- if (r < 0 && r != -ENODATA) {
- log_link_warning_errno(link, r, "rtnl: failed to read RTA_MULTIPATH attribute, ignoring: %m");
- return 0;
- } else if (r >= 0) {
- r = rtattr_read_nexthop(rta_multipath, rta_len, tmp->family, &tmp->multipath_routes);
- if (r < 0) {
- log_link_warning_errno(link, r, "rtnl: failed to parse RTA_MULTIPATH attribute, ignoring: %m");
- return 0;
- }
- }
-
r = sd_netlink_message_read(message, RTA_CACHEINFO, sizeof(cacheinfo), &cacheinfo);
if (r < 0 && r != -ENODATA) {
log_link_warning_errno(link, r, "rtnl: failed to read RTA_CACHEINFO attribute, ignoring: %m");
projects / thirdparty / systemd.git / commitdiff
