diff --git a/ip/ip_common.h b/ip/ip_common.h index ac1e4c19..e56d1ac5 100644 --- a/ip/ip_common.h +++ b/ip/ip_common.h @@ -51,6 +51,7 @@ extern int do_ipl2tp(int argc, char **argv); extern int do_tcp_metrics(int argc, char **argv); extern int do_ipnetconf(int argc, char **argv); extern int do_iptoken(int argc, char **argv); +extern int iplink_get(unsigned int flags, char *name, __u32 filt_mask); static inline int rtm_get_table(struct rtmsg *r, struct rtattr **tb) { diff --git a/ip/ipaddress.c b/ip/ipaddress.c index 8bb85119..245df391 100644 --- a/ip/ipaddress.c +++ b/ip/ipaddress.c @@ -1241,6 +1241,19 @@ static int ipaddr_list_flush_or_save(int argc, char **argv, int action) exit(0); } + /* + * If only filter_dev present and none of the other + * link filters are present, use RTM_GETLINK to get + * the link device + */ + if (filter_dev && filter.group == -1 && do_link == 1) { + if (iplink_get(0, filter_dev, RTEXT_FILTER_VF) < 0) { + perror("Cannot send link get request"); + exit(1); + } + exit(0); + } + if (rtnl_wilddump_request(&rth, preferred_family, RTM_GETLINK) < 0) { perror("Cannot send dump request"); exit(1); diff --git a/ip/iplink.c b/ip/iplink.c index 5e428da5..18fb1ccd 100644 --- a/ip/iplink.c +++ b/ip/iplink.c @@ -709,6 +709,38 @@ static int iplink_modify(int cmd, unsigned int flags, int argc, char **argv) return 0; } +int iplink_get(unsigned int flags, char *name, __u32 filt_mask) +{ + int len; + struct iplink_req req; + char answer[16384]; + + memset(&req, 0, sizeof(req)); + + req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)); + req.n.nlmsg_flags = NLM_F_REQUEST|flags; + req.n.nlmsg_type = RTM_GETLINK; + req.i.ifi_family = preferred_family; + + if (name) { + len = strlen(name) + 1; + if (len == 1) + invarg("\"\" is not a valid device identifier\n", + "name"); + if (len > IFNAMSIZ) + invarg("\"name\" too long\n", name); + addattr_l(&req.n, sizeof(req), IFLA_IFNAME, name, len); + } + addattr32(&req.n, sizeof(req), IFLA_EXT_MASK, filt_mask); + + if (rtnl_talk(&rth, &req.n, 0, 0, (struct nlmsghdr *)answer) < 0) + return -2; + + print_linkinfo(NULL, (struct nlmsghdr *)answer, stdout); + + return 0; +} + #if IPLINK_IOCTL_COMPAT static int get_ctl_fd(void) {