return 1;
}
+static int set_mtu_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+ Link *link = userdata;
+ int r;
+
+ assert(m);
+ assert(link);
+ assert(link->ifname);
+
+ if (link->state == LINK_STATE_FAILED)
+ return 1;
+
+ r = sd_rtnl_message_get_errno(m);
+ if (r < 0 && r != -EEXIST)
+ log_warning_link(link, "Could not set MTU: %s", strerror(-r));
+
+ return 1;
+}
+
+static int link_set_mtu(Link *link, uint32_t mtu) {
+ _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL;
+ int r;
+
+ assert(link);
+ assert(link->manager);
+ assert(link->manager->rtnl);
+
+ log_debug_link(link, "setting MTU: %" PRIu32, mtu);
+
+ r = sd_rtnl_message_link_new(RTM_SETLINK, link->ifindex, &req);
+ if (r < 0) {
+ log_error_link(link, "Could not allocate RTM_SETLINK message");
+ return r;
+ }
+
+ r = sd_rtnl_message_append_u32(req, IFLA_MTU, mtu);
+ if (r < 0) {
+ log_error_link(link, "Could not append MTU: %s", strerror(-r));
+ return r;
+ }
+
+ r = sd_rtnl_call_async(link->manager->rtnl, req, set_mtu_handler, link, 0, NULL);
+ if (r < 0) {
+ log_error_link(link,
+ "Could not send rtnetlink message: %s", strerror(-r));
+ return r;
+ }
+
+ return 0;
+}
+
static void dhcp_handler(sd_dhcp_client *client, int event, void *userdata) {
Link *link = userdata;
struct in_addr address;
int r;
assert(link);
+ assert(link->network);
if (link->state == LINK_STATE_FAILED)
return;
route_free(link->dhcp_route);
link->dhcp_route = NULL;
}
+
+ if (link->network->dhcp_mtu) {
+ uint16_t mtu;
+
+ r = sd_dhcp_client_get_mtu(client, &mtu);
+ if (r >= 0 && link->original_mtu != mtu) {
+ r = link_set_mtu(link, link->original_mtu);
+ if (r < 0) {
+ log_warning_link(link, "DHCP error: could not reset MTU");
+ link_enter_failed(link);
+ return;
+ }
+ }
+ }
}
r = sd_dhcp_client_get_address(client, &address);
if (event == DHCP_EVENT_IP_CHANGE || event == DHCP_EVENT_IP_ACQUIRE) {
_cleanup_address_free_ Address *addr = NULL;
_cleanup_route_free_ Route *rt = NULL;
+ struct in_addr **nameservers;
log_struct_link(LOG_INFO, link,
"MESSAGE=%s: DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u",
addr = NULL;
rt = NULL;
+ if (link->network->dhcp_dns) {
+ r = sd_dhcp_client_get_dns(client, &nameservers);
+ if (r >= 0) {
+ r = manager_update_resolv_conf(link->manager);
+ if (r < 0)
+ log_error("Failed to update resolv.conf");
+ }
+ }
+
+ if (link->network->dhcp_mtu) {
+ uint16_t mtu;
+
+ r = sd_dhcp_client_get_mtu(client, &mtu);
+ if (r >= 0) {
+ r = link_set_mtu(link, mtu);
+ if (r < 0)
+ log_error_link(link, "Failed to set MTU "
+ "to %" PRIu16, mtu);
+ }
+ }
+
link_enter_set_addresses(link);
}
return r;
}
+ log_debug_link(link, "acquiring DHCPv4 lease");
+
+ if (link->network->dhcp_mtu) {
+ r = sd_dhcp_client_set_request_option(link->dhcp, 26);
+ if (r < 0)
+ return r;
+ }
+
r = sd_dhcp_client_start(link->dhcp);
if (r < 0)
return r;
return 0;
if (link->flags == flags) {
- log_debug_link(link, "link status unchanged: %#x", flags);
+ log_debug_link(link, "link status unchanged: %#.8x", flags);
return 0;
}
}
log_debug_link(link,
- "link status updated: %#x -> %#x", link->flags, flags);
+ "link status updated: %#.8x -> %#.8x", link->flags, flags);
link->flags = flags;
link->network->bridge->name,
BRIDGE(link->network->bridge),
NULL);
+
link_bridge_joined(link);
return 1;
int link_update(Link *link, sd_rtnl_message *m) {
unsigned flags;
+ void *data;
+ uint16_t type;
int r;
assert(link);
r = sd_rtnl_message_link_get_flags(m, &flags);
if (r < 0) {
- log_warning_link(link, "could not get link flags");
+ log_warning_link(link, "Could not get link flags");
return r;
}
+ while (sd_rtnl_message_read(m, &type, &data) > 0) {
+ if (type == IFLA_MTU && link->network->dhcp_mtu && !link->original_mtu) {
+ link->original_mtu = *(uint16_t *) data;
+ log_debug_link(link, "saved original MTU: %" PRIu16, link->original_mtu);
+ }
+ }
+
return link_update_flags(link, flags);
}