diff options
Diffstat (limited to 'zebra/if_netlink.c')
| -rw-r--r-- | zebra/if_netlink.c | 32 |
1 files changed, 29 insertions, 3 deletions
diff --git a/zebra/if_netlink.c b/zebra/if_netlink.c index 8c50a95065..5af6c3a08f 100644 --- a/zebra/if_netlink.c +++ b/zebra/if_netlink.c @@ -437,6 +437,32 @@ netlink_interface (struct sockaddr_nl *snl, struct nlmsghdr *h, return 0; } +/* Request for specific interface or address information from the kernel */ +static int +netlink_request_intf_addr (struct zebra_ns *zns, + int family, int type, + u_int32_t filter_mask) +{ + struct + { + struct nlmsghdr n; + struct ifinfomsg ifm; + char buf[256]; + } req; + + /* Form the request, specifying filter (rtattr) if needed. */ + memset (&req, 0, sizeof (req)); + req.n.nlmsg_type = type; + req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)); + req.ifm.ifi_family = family; + + /* Include filter, if specified. */ + if (filter_mask) + addattr32 (&req.n, sizeof(req), IFLA_EXT_MASK, filter_mask); + + return netlink_request (&zns->netlink_cmd, &req.n); +} + /* Interface lookup by netlink socket. */ int interface_lookup_netlink (struct zebra_ns *zns) @@ -444,7 +470,7 @@ interface_lookup_netlink (struct zebra_ns *zns) int ret; /* Get interface information. */ - ret = netlink_request (AF_PACKET, RTM_GETLINK, &zns->netlink_cmd); + ret = netlink_request_intf_addr (zns, AF_PACKET, RTM_GETLINK, 0); if (ret < 0) return ret; ret = netlink_parse_info (netlink_interface, &zns->netlink_cmd, zns, 0, 1); @@ -452,7 +478,7 @@ interface_lookup_netlink (struct zebra_ns *zns) return ret; /* Get IPv4 address of the interfaces. */ - ret = netlink_request (AF_INET, RTM_GETADDR, &zns->netlink_cmd); + ret = netlink_request_intf_addr (zns, AF_INET, RTM_GETADDR, 0); if (ret < 0) return ret; ret = netlink_parse_info (netlink_interface_addr, &zns->netlink_cmd, zns, 0, 1); @@ -460,7 +486,7 @@ interface_lookup_netlink (struct zebra_ns *zns) return ret; /* Get IPv6 address of the interfaces. */ - ret = netlink_request (AF_INET6, RTM_GETADDR, &zns->netlink_cmd); + ret = netlink_request_intf_addr (zns, AF_INET6, RTM_GETADDR, 0); if (ret < 0) return ret; ret = netlink_parse_info (netlink_interface_addr, &zns->netlink_cmd, zns, 0, 1); |