diff options
| -rw-r--r-- | networking/libiproute/iplink.c | 93 |
1 files changed, 91 insertions, 2 deletions
diff --git a/networking/libiproute/iplink.c b/networking/libiproute/iplink.c index df8a354a1..a28df6e79 100644 --- a/networking/libiproute/iplink.c +++ b/networking/libiproute/iplink.c @@ -283,11 +283,98 @@ static int ipaddr_list_link(char **argv) return ipaddr_list_or_flush(argv, 0); } +#ifndef NLMSG_TAIL +#define NLMSG_TAIL(nmsg) \ + ((struct rtattr *) (((void *) (nmsg)) + NLMSG_ALIGN((nmsg)->nlmsg_len))) +#endif +/* Return value becomes exitcode. It's okay to not return at all */ +static int do_change(char **argv, const unsigned rtm) +{ + static const char keywords[] ALIGN1 = + "link\0""name\0""type\0""dev\0"; + enum { + ARG_link, + ARG_name, + ARG_type, + ARG_dev, + }; + struct rtnl_handle rth; + struct { + struct nlmsghdr n; + struct ifinfomsg i; + char buf[1024]; + } req; + int arg; + char *name_str = NULL, *link_str = NULL, *type_str = NULL, *dev_str = NULL; + + memset(&req, 0, sizeof(req)); + + req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)); + req.n.nlmsg_flags = NLM_F_REQUEST; + req.n.nlmsg_type = rtm; + req.i.ifi_family = preferred_family; + if (rtm == RTM_NEWLINK) + req.n.nlmsg_flags |= NLM_F_CREATE|NLM_F_EXCL; + + while (*argv) { + arg = index_in_substrings(keywords, *argv); + if (arg == ARG_link) { + NEXT_ARG(); + link_str = *argv; + } else if (arg == ARG_name) { + NEXT_ARG(); + name_str = *argv; + } else if (arg == ARG_type) { + NEXT_ARG(); + type_str = *argv; + } else { + if (arg == ARG_dev) { + if (dev_str) + duparg(*argv, "dev"); + NEXT_ARG(); + } + dev_str = *argv; + } + argv++; + } + xrtnl_open(&rth); + ll_init_map(&rth); + if (type_str) { + struct rtattr *linkinfo = NLMSG_TAIL(&req.n); + + addattr_l(&req.n, sizeof(req), IFLA_LINKINFO, NULL, 0); + addattr_l(&req.n, sizeof(req), IFLA_INFO_KIND, type_str, + strlen(type_str)); + linkinfo->rta_len = (void *)NLMSG_TAIL(&req.n) - (void *)linkinfo; + } + if (rtm != RTM_NEWLINK) { + if (!dev_str) + return 1; /* Need a device to delete */ + req.i.ifi_index = xll_name_to_index(dev_str); + } else { + if (!name_str) + name_str = dev_str; + if (link_str) { + int idx = xll_name_to_index(link_str); + addattr_l(&req.n, sizeof(req), IFLA_LINK, &idx, 4); + } + } + if (name_str) { + const size_t name_len = strlen(name_str) + 1; + if (name_len < 2 || name_len > IFNAMSIZ) + invarg(name_str, "name"); + addattr_l(&req.n, sizeof(req), IFLA_IFNAME, name_str, name_len); + } + if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0) + return 2; + return 0; +} + /* Return value becomes exitcode. It's okay to not return at all */ int do_iplink(char **argv) { static const char keywords[] ALIGN1 = - "set\0""show\0""lst\0""list\0"; + "add\0""delete\0""set\0""show\0""lst\0""list\0"; int key; if (!*argv) return ipaddr_list_link(argv); @@ -295,7 +382,9 @@ int do_iplink(char **argv) if (key < 0) bb_error_msg_and_die(bb_msg_invalid_arg, *argv, applet_name); argv++; - if (key == 0) /* set */ + if (key <= 1) /* add/delete */ + return do_change(argv, key ? RTM_DELLINK : RTM_NEWLINK); + else if (key == 2) /* set */ return do_set(argv); /* show, lst, list */ return ipaddr_list_link(argv); |