/* * iplink.c "ip link". * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. * * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> * */ #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <syslog.h> #include <fcntl.h> #include <dlfcn.h> #include <errno.h> #include <sys/socket.h> #include <linux/if.h> #include <linux/if_packet.h> #include <linux/if_ether.h> #include <linux/sockios.h> #include <netinet/in.h> #include <arpa/inet.h> #include <string.h> #include <sys/ioctl.h> #include <linux/sockios.h> #include "rt_names.h" #include "utils.h" #include "ip_common.h" #define IPLINK_IOCTL_COMPAT 1 #ifndef LIBDIR #define LIBDIR "/usr/lib/" #endif static void usage(void) __attribute__((noreturn)); static int iplink_have_newlink(void); void iplink_usage(void) { if (iplink_have_newlink()) { fprintf(stderr, "Usage: ip link add link DEV [ name ] NAME\n"); fprintf(stderr, " [ txqueuelen PACKETS ]\n"); fprintf(stderr, " [ address LLADDR ]\n"); fprintf(stderr, " [ broadcast LLADDR ]\n"); fprintf(stderr, " [ mtu MTU ]\n"); fprintf(stderr, " type TYPE [ ARGS ]\n"); fprintf(stderr, " ip link delete DEV type TYPE [ ARGS ]\n"); fprintf(stderr, "\n"); fprintf(stderr, " ip link set DEVICE [ { up | down } ]\n"); } else fprintf(stderr, "Usage: ip link set DEVICE [ { up | down } ]\n"); fprintf(stderr, " [ arp { on | off } ]\n"); fprintf(stderr, " [ dynamic { on | off } ]\n"); fprintf(stderr, " [ multicast { on | off } ]\n"); fprintf(stderr, " [ allmulticast { on | off } ]\n"); fprintf(stderr, " [ promisc { on | off } ]\n"); fprintf(stderr, " [ trailers { on | off } ]\n"); fprintf(stderr, " [ txqueuelen PACKETS ]\n"); fprintf(stderr, " [ name NEWNAME ]\n"); fprintf(stderr, " [ address LLADDR ]\n"); fprintf(stderr, " [ broadcast LLADDR ]\n"); fprintf(stderr, " [ mtu MTU ]\n"); fprintf(stderr, " [ netns PID ]\n"); fprintf(stderr, " [ alias NAME ]\n"); fprintf(stderr, " [ vf NUM [ mac LLADDR ]\n"); fprintf(stderr, " [ vlan VLANID [ qos VLAN-QOS ] ]\n"); fprintf(stderr, " [ rate TXRATE ] ] \n"); fprintf(stderr, " ip link show [ DEVICE ]\n"); if (iplink_have_newlink()) { fprintf(stderr, "\n"); fprintf(stderr, "TYPE := { vlan | veth | vcan | dummy | ifb | macvlan | can }\n"); } exit(-1); } static void usage(void) { iplink_usage(); } static int on_off(char *msg) { fprintf(stderr, "Error: argument of \"%s\" must be \"on\" or \"off\"\n", msg); return -1; } static void *BODY; /* cached dlopen(NULL) handle */ static struct link_util *linkutil_list; struct link_util *get_link_kind(const char *id) { void *dlh; char buf[256]; struct link_util *l; for (l = linkutil_list; l; l = l->next) if (strcmp(l->id, id) == 0) return l; snprintf(buf, sizeof(buf), LIBDIR "/ip/link_%s.so", id); dlh = dlopen(buf, RTLD_LAZY); if (dlh == NULL) { /* look in current binary, only open once */ dlh = BODY; if (dlh == NULL) { dlh = BODY = dlopen(NULL, RTLD_LAZY); if (dlh == NULL) return NULL; } } snprintf(buf, sizeof(buf), "%s_link_util", id); l = dlsym(dlh, buf); if (l == NULL) return NULL; l->next = linkutil_list; linkutil_list = l; return l; } #if IPLINK_IOCTL_COMPAT static int have_rtnl_newlink = -1; static int accept_msg(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg) { struct nlmsgerr *err = (struct nlmsgerr *)NLMSG_DATA(n); if (n->nlmsg_type == NLMSG_ERROR && (err->error == -EOPNOTSUPP || err->error == -EINVAL)) have_rtnl_newlink = 0; else have_rtnl_newlink = 1; return -1; } static int iplink_have_newlink(void) { struct { struct nlmsghdr n; struct ifinfomsg i; char buf[1024]; } req; if (have_rtnl_newlink < 0) { memset(&req, 0, sizeof(req)); req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)); req.n.nlmsg_flags = NLM_F_REQUEST|NLM_F_ACK; req.n.nlmsg_type = RTM_NEWLINK; req.i.ifi_family = AF_UNSPEC; rtnl_send(&rth, (char *)&req.n, req.n.nlmsg_len); rtnl_listen(&rth, accept_msg, NULL); } return have_rtnl_newlink; } #else /* IPLINK_IOCTL_COMPAT */ static int iplink_have_newlink(void) { return 1; } #endif /* ! IPLINK_IOCTL_COMPAT */ struct iplink_req { struct nlmsghdr n; struct ifinfomsg i; char buf[1024]; }; int iplink_parse_vf(int vf, int *argcp, char ***argvp, struct iplink_req *req) { int len, argc = *argcp; char **argv = *argvp; struct rtattr *vfinfo; vfinfo = addattr_nest(&req->n, sizeof(*req), IFLA_VF_INFO); while (NEXT_ARG_OK()) { NEXT_ARG(); if (matches(*argv, "mac") == 0) { struct ifla_vf_mac ivm; NEXT_ARG(); ivm.vf = vf; len = ll_addr_a2n((char *)ivm.mac, 32, *argv); if (len < 0) return -1; addattr_l(&req->n, sizeof(*req), IFLA_VF_MAC, &ivm, sizeof(ivm)); } else if (matches(*argv, "vlan") == 0) { struct ifla_vf_vlan ivv; NEXT_ARG(); if (get_unsigned(&ivv.vlan, *argv, 0)) { invarg("Invalid \"vlan\" value\n", *argv); } ivv.vf = vf; ivv.qos = 0; if (NEXT_ARG_OK()) { NEXT_ARG(); if (matches(*argv, "qos") == 0) { NEXT_ARG(); if (get_unsigned(&ivv.qos, *argv, 0)) { invarg("Invalid \"qos\" value\n", *argv); } } else { /* rewind arg */ PREV_ARG(); } } addattr_l(&req->n, sizeof(*req), IFLA_VF_VLAN, &ivv, sizeof(ivv)); } else if (matches(*argv, "rate") == 0) { struct ifla_vf_tx_rate ivt; NEXT_ARG(); if (get_unsigned(&ivt.rate, *argv, 0)) { invarg("Invalid \"rate\" value\n", *argv); } ivt.vf = vf; addattr_l(&req->n, sizeof(*req), IFLA_VF_TX_RATE, &ivt, sizeof(ivt)); } else { /* rewind arg */ PREV_ARG(); break; } } if (argc == *argcp) incomplete_command(); addattr_nest_end(&req->n, vfinfo); *argcp = argc; *argvp = argv; return 0; } int iplink_parse(int argc, char **argv, struct iplink_req *req, char **name, char **type, char **link, char **dev) { int ret, len; char abuf[32]; int qlen = -1; int mtu = -1; int netns = -1; int vf = -1; ret = argc; while (argc > 0) { if (strcmp(*argv, "up") == 0) { req->i.ifi_change |= IFF_UP; req->i.ifi_flags |= IFF_UP; } else if (strcmp(*argv, "down") == 0) { req->i.ifi_change |= IFF_UP; req->i.ifi_flags &= ~IFF_UP; } else if (strcmp(*argv, "name") == 0) { NEXT_ARG(); *name = *argv; } else if (matches(*argv, "link") == 0) { NEXT_ARG(); *link = *argv; } else if (matches(*argv, "address") == 0) { NEXT_ARG(); len = ll_addr_a2n(abuf, sizeof(abuf), *argv); if (len < 0) return -1; addattr_l(&req->n, sizeof(*req), IFLA_ADDRESS, abuf, len); } else if (matches(*argv, "broadcast") == 0 || strcmp(*argv, "brd") == 0) { NEXT_ARG(); len = ll_addr_a2n(abuf, sizeof(abuf), *argv); if (len < 0) return -1; addattr_l(&req->n, sizeof(*req), IFLA_BROADCAST, abuf, len); } else if (matches(*argv, "txqueuelen") == 0 || strcmp(*argv, "qlen") == 0 || matches(*argv, "txqlen") == 0) { NEXT_ARG(); if (qlen != -1) duparg("txqueuelen", *argv); if (get_integer(&qlen, *argv, 0)) invarg("Invalid \"txqueuelen\" value\n", *argv); addattr_l(&req->n, sizeof(*req), IFLA_TXQLEN, &qlen, 4); } else if (strcmp(*argv, "mtu") == 0) { NEXT_ARG(); if (mtu != -1) duparg("mtu", *argv); if (get_integer(&mtu, *argv, 0)) invarg("Invalid \"mtu\" value\n", *argv); addattr_l(&req->n, sizeof(*req), IFLA_MTU, &mtu, 4); } else if (strcmp(*argv, "netns") == 0) { NEXT_ARG(); if (netns != -1) duparg("netns", *argv); if (get_integer(&netns, *argv, 0)) invarg("Invalid \"netns\" value\n", *argv); addattr_l(&req->n, sizeof(*req), IFLA_NET_NS_PID, &netns, 4); } else if (strcmp(*argv, "multicast") == 0) { NEXT_ARG(); req->i.ifi_change |= IFF_MULTICAST; if (strcmp(*argv, "on") == 0) { req->i.ifi_flags |= IFF_MULTICAST; } else if (strcmp(*argv, "off") == 0) { req->i.ifi_flags &= ~IFF_MULTICAST; } else return on_off("multicast"); } else if (strcmp(*argv, "allmulticast") == 0) { NEXT_ARG(); req->i.ifi_change |= IFF_ALLMULTI; if (strcmp(*argv, "on") == 0) { req->i.ifi_flags |= IFF_ALLMULTI; } else if (strcmp(*argv, "off") == 0) { req->i.ifi_flags &= ~IFF_ALLMULTI; } else return on_off("allmulticast"); } else if (strcmp(*argv, "promisc") == 0) { NEXT_ARG(); req->i.ifi_change |= IFF_PROMISC; if (strcmp(*argv, "on") == 0) { req->i.ifi_flags |= IFF_PROMISC; } else if (strcmp(*argv, "off") == 0) { req->i.ifi_flags &= ~IFF_PROMISC; } else return on_off("promisc"); } else if (strcmp(*argv, "trailers") == 0) { NEXT_ARG(); req->i.ifi_change |= IFF_NOTRAILERS; if (strcmp(*argv, "off") == 0) { req->i.ifi_flags |= IFF_NOTRAILERS; } else if (strcmp(*argv, "on") == 0) { req->i.ifi_flags &= ~IFF_NOTRAILERS; } else return on_off("trailers"); } else if (strcmp(*argv, "arp") == 0) { NEXT_ARG(); req->i.ifi_change |= IFF_NOARP; if (strcmp(*argv, "on") == 0) { req->i.ifi_flags &= ~IFF_NOARP; } else if (strcmp(*argv, "off") == 0) { req->i.ifi_flags |= IFF_NOARP; } else return on_off("noarp"); } else if (strcmp(*argv, "vf") == 0) { struct rtattr *vflist; NEXT_ARG(); if (get_integer(&vf, *argv, 0)) { invarg("Invalid \"vf\" value\n", *argv); } vflist = addattr_nest(&req->n, sizeof(*req), IFLA_VFINFO_LIST); len = iplink_parse_vf(vf, &argc, &argv, req); if (len < 0) return -1; addattr_nest_end(&req->n, vflist); #ifdef IFF_DYNAMIC } else if (matches(*argv, "dynamic") == 0) { NEXT_ARG(); req->i.ifi_change |= IFF_DYNAMIC; if (strcmp(*argv, "on") == 0) { req->i.ifi_flags |= IFF_DYNAMIC; } else if (strcmp(*argv, "off") == 0) { req->i.ifi_flags &= ~IFF_DYNAMIC; } else return on_off("dynamic"); #endif } else if (matches(*argv, "type") == 0) { NEXT_ARG(); *type = *argv; argc--; argv++; break; } else if (matches(*argv, "alias") == 0) { NEXT_ARG(); addattr_l(&req->n, sizeof(*req), IFLA_IFALIAS, *argv, strlen(*argv)); argc--; argv++; break; } else { if (strcmp(*argv, "dev") == 0) { NEXT_ARG(); } if (matches(*argv, "help") == 0) usage(); if (*dev) duparg2("dev", *argv); *dev = *argv; } argc--; argv++; } return ret - argc; } static int iplink_modify(int cmd, unsigned int flags, int argc, char **argv) { int len; char *dev = NULL; char *name = NULL; char *link = NULL; char *type = NULL; struct link_util *lu = NULL; struct iplink_req req; int ret; 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 = cmd; req.i.ifi_family = preferred_family; ret = iplink_parse(argc, argv, &req, &name, &type, &link, &dev); if (ret < 0) return ret; argc -= ret; argv += ret; ll_init_map(&rth); if (type) { 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, strlen(type)); lu = get_link_kind(type); if (lu && argc) { struct rtattr * data = NLMSG_TAIL(&req.n); addattr_l(&req.n, sizeof(req), IFLA_INFO_DATA, NULL, 0); if (lu->parse_opt && lu->parse_opt(lu, argc, argv, &req.n)) return -1; data->rta_len = (void *)NLMSG_TAIL(&req.n) - (void *)data; } else if (argc) { if (matches(*argv, "help") == 0) usage(); fprintf(stderr, "Garbage instead of arguments \"%s ...\". " "Try \"ip link help\".\n", *argv); return -1; } linkinfo->rta_len = (void *)NLMSG_TAIL(&req.n) - (void *)linkinfo; } else if (flags & NLM_F_CREATE) { fprintf(stderr, "Not enough information: \"type\" argument " "is required\n"); return -1; } if (!(flags & NLM_F_CREATE)) { if (!dev) { fprintf(stderr, "Not enough information: \"dev\" " "argument is required.\n"); exit(-1); } req.i.ifi_index = ll_name_to_index(dev); if (req.i.ifi_index == 0) { fprintf(stderr, "Cannot find device \"%s\"\n", dev); return -1; } } else { /* Allow "ip link add dev" and "ip link add name" */ if (!name) name = dev; if (link) { int ifindex; ifindex = ll_name_to_index(link); if (ifindex == 0) { fprintf(stderr, "Cannot find device \"%s\"\n", link); return -1; } addattr_l(&req.n, sizeof(req), IFLA_LINK, &ifindex, 4); } } 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); } if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0) exit(2); return 0; } #if IPLINK_IOCTL_COMPAT static int get_ctl_fd(void) { int s_errno; int fd; fd = socket(PF_INET, SOCK_DGRAM, 0); if (fd >= 0) return fd; s_errno = errno; fd = socket(PF_PACKET, SOCK_DGRAM, 0); if (fd >= 0) return fd; fd = socket(PF_INET6, SOCK_DGRAM, 0); if (fd >= 0) return fd; errno = s_errno; perror("Cannot create control socket"); return -1; } static int do_chflags(const char *dev, __u32 flags, __u32 mask) { struct ifreq ifr; int fd; int err; strncpy(ifr.ifr_name, dev, IFNAMSIZ); fd = get_ctl_fd(); if (fd < 0) return -1; err = ioctl(fd, SIOCGIFFLAGS, &ifr); if (err) { perror("SIOCGIFFLAGS"); close(fd); return -1; } if ((ifr.ifr_flags^flags)&mask) { ifr.ifr_flags &= ~mask; ifr.ifr_flags |= mask&flags; err = ioctl(fd, SIOCSIFFLAGS, &ifr); if (err) perror("SIOCSIFFLAGS"); } close(fd); return err; } static int do_changename(const char *dev, const char *newdev) { struct ifreq ifr; int fd; int err; strncpy(ifr.ifr_name, dev, IFNAMSIZ); strncpy(ifr.ifr_newname, newdev, IFNAMSIZ); fd = get_ctl_fd(); if (fd < 0) return -1; err = ioctl(fd, SIOCSIFNAME, &ifr); if (err) { perror("SIOCSIFNAME"); close(fd); return -1; } close(fd); return err; } static int set_qlen(const char *dev, int qlen) { struct ifreq ifr; int s; s = get_ctl_fd(); if (s < 0) return -1; memset(&ifr, 0, sizeof(ifr)); strncpy(ifr.ifr_name, dev, IFNAMSIZ); ifr.ifr_qlen = qlen; if (ioctl(s, SIOCSIFTXQLEN, &ifr) < 0) { perror("SIOCSIFXQLEN"); close(s); return -1; } close(s); return 0; } static int set_mtu(const char *dev, int mtu) { struct ifreq ifr; int s; s = get_ctl_fd(); if (s < 0) return -1; memset(&ifr, 0, sizeof(ifr)); strncpy(ifr.ifr_name, dev, IFNAMSIZ); ifr.ifr_mtu = mtu; if (ioctl(s, SIOCSIFMTU, &ifr) < 0) { perror("SIOCSIFMTU"); close(s); return -1; } close(s); return 0; } static int get_address(const char *dev, int *htype) { struct ifreq ifr; struct sockaddr_ll me; socklen_t alen; int s; s = socket(PF_PACKET, SOCK_DGRAM, 0); if (s < 0) { perror("socket(PF_PACKET)"); return -1; } memset(&ifr, 0, sizeof(ifr)); strncpy(ifr.ifr_name, dev, IFNAMSIZ); if (ioctl(s, SIOCGIFINDEX, &ifr) < 0) { perror("SIOCGIFINDEX"); close(s); return -1; } memset(&me, 0, sizeof(me)); me.sll_family = AF_PACKET; me.sll_ifindex = ifr.ifr_ifindex; me.sll_protocol = htons(ETH_P_LOOP); if (bind(s, (struct sockaddr*)&me, sizeof(me)) == -1) { perror("bind"); close(s); return -1; } alen = sizeof(me); if (getsockname(s, (struct sockaddr*)&me, &alen) == -1) { perror("getsockname"); close(s); return -1; } close(s); *htype = me.sll_hatype; return me.sll_halen; } static int parse_address(const char *dev, int hatype, int halen, char *lla, struct ifreq *ifr) { int alen; memset(ifr, 0, sizeof(*ifr)); strncpy(ifr->ifr_name, dev, IFNAMSIZ); ifr->ifr_hwaddr.sa_family = hatype; alen = ll_addr_a2n(ifr->ifr_hwaddr.sa_data, 14, lla); if (alen < 0) return -1; if (alen != halen) { fprintf(stderr, "Wrong address (%s) length: expected %d bytes\n", lla, halen); return -1; } return 0; } static int set_address(struct ifreq *ifr, int brd) { int s; s = get_ctl_fd(); if (s < 0) return -1; if (ioctl(s, brd?SIOCSIFHWBROADCAST:SIOCSIFHWADDR, ifr) < 0) { perror(brd?"SIOCSIFHWBROADCAST":"SIOCSIFHWADDR"); close(s); return -1; } close(s); return 0; } static int do_set(int argc, char **argv) { char *dev = NULL; __u32 mask = 0; __u32 flags = 0; int qlen = -1; int mtu = -1; char *newaddr = NULL; char *newbrd = NULL; struct ifreq ifr0, ifr1; char *newname = NULL; int htype, halen; while (argc > 0) { if (strcmp(*argv, "up") == 0) { mask |= IFF_UP; flags |= IFF_UP; } else if (strcmp(*argv, "down") == 0) { mask |= IFF_UP; flags &= ~IFF_UP; } else if (strcmp(*argv, "name") == 0) { NEXT_ARG(); newname = *argv; } else if (matches(*argv, "address") == 0) { NEXT_ARG(); newaddr = *argv; } else if (matches(*argv, "broadcast") == 0 || strcmp(*argv, "brd") == 0) { NEXT_ARG(); newbrd = *argv; } else if (matches(*argv, "txqueuelen") == 0 || strcmp(*argv, "qlen") == 0 || matches(*argv, "txqlen") == 0) { NEXT_ARG(); if (qlen != -1) duparg("txqueuelen", *argv); if (get_integer(&qlen, *argv, 0)) invarg("Invalid \"txqueuelen\" value\n", *argv); } else if (strcmp(*argv, "mtu") == 0) { NEXT_ARG(); if (mtu != -1) duparg("mtu", *argv); if (get_integer(&mtu, *argv, 0)) invarg("Invalid \"mtu\" value\n", *argv); } else if (strcmp(*argv, "multicast") == 0) { NEXT_ARG(); mask |= IFF_MULTICAST; if (strcmp(*argv, "on") == 0) { flags |= IFF_MULTICAST; } else if (strcmp(*argv, "off") == 0) { flags &= ~IFF_MULTICAST; } else return on_off("multicast"); } else if (strcmp(*argv, "allmulticast") == 0) { NEXT_ARG(); mask |= IFF_ALLMULTI; if (strcmp(*argv, "on") == 0) { flags |= IFF_ALLMULTI; } else if (strcmp(*argv, "off") == 0) { flags &= ~IFF_ALLMULTI; } else return on_off("allmulticast"); } else if (strcmp(*argv, "promisc") == 0) { NEXT_ARG(); mask |= IFF_PROMISC; if (strcmp(*argv, "on") == 0) { flags |= IFF_PROMISC; } else if (strcmp(*argv, "off") == 0) { flags &= ~IFF_PROMISC; } else return on_off("promisc"); } else if (strcmp(*argv, "trailers") == 0) { NEXT_ARG(); mask |= IFF_NOTRAILERS; if (strcmp(*argv, "off") == 0) { flags |= IFF_NOTRAILERS; } else if (strcmp(*argv, "on") == 0) { flags &= ~IFF_NOTRAILERS; } else return on_off("trailers"); } else if (strcmp(*argv, "arp") == 0) { NEXT_ARG(); mask |= IFF_NOARP; if (strcmp(*argv, "on") == 0) { flags &= ~IFF_NOARP; } else if (strcmp(*argv, "off") == 0) { flags |= IFF_NOARP; } else return on_off("noarp"); #ifdef IFF_DYNAMIC } else if (matches(*argv, "dynamic") == 0) { NEXT_ARG(); mask |= IFF_DYNAMIC; if (strcmp(*argv, "on") == 0) { flags |= IFF_DYNAMIC; } else if (strcmp(*argv, "off") == 0) { flags &= ~IFF_DYNAMIC; } else return on_off("dynamic"); #endif } else { if (strcmp(*argv, "dev") == 0) { NEXT_ARG(); } if (matches(*argv, "help") == 0) usage(); if (dev) duparg2("dev", *argv); dev = *argv; } argc--; argv++; } if (!dev) { fprintf(stderr, "Not enough of information: \"dev\" argument is required.\n"); exit(-1); } if (newaddr || newbrd) { halen = get_address(dev, &htype); if (halen < 0) return -1; if (newaddr) { if (parse_address(dev, htype, halen, newaddr, &ifr0) < 0) return -1; } if (newbrd) { if (parse_address(dev, htype, halen, newbrd, &ifr1) < 0) return -1; } } if (newname && strcmp(dev, newname)) { if (strlen(newname) == 0) invarg("\"\" is not a valid device identifier\n", "name"); if (do_changename(dev, newname) < 0) return -1; dev = newname; } if (qlen != -1) { if (set_qlen(dev, qlen) < 0) return -1; } if (mtu != -1) { if (set_mtu(dev, mtu) < 0) return -1; } if (newaddr || newbrd) { if (newbrd) { if (set_address(&ifr1, 1) < 0) return -1; } if (newaddr) { if (set_address(&ifr0, 0) < 0) return -1; } } if (mask) return do_chflags(dev, flags, mask); return 0; } #endif /* IPLINK_IOCTL_COMPAT */ int do_iplink(int argc, char **argv) { if (argc > 0) { if (iplink_have_newlink()) { if (matches(*argv, "add") == 0) return iplink_modify(RTM_NEWLINK, NLM_F_CREATE|NLM_F_EXCL, argc-1, argv+1); if (matches(*argv, "set") == 0 || matches(*argv, "change") == 0) return iplink_modify(RTM_NEWLINK, 0, argc-1, argv+1); if (matches(*argv, "replace") == 0) return iplink_modify(RTM_NEWLINK, NLM_F_CREATE|NLM_F_REPLACE, argc-1, argv+1); if (matches(*argv, "delete") == 0) return iplink_modify(RTM_DELLINK, 0, argc-1, argv+1); } else { #if IPLINK_IOCTL_COMPAT if (matches(*argv, "set") == 0) return do_set(argc-1, argv+1); #endif } if (matches(*argv, "show") == 0 || matches(*argv, "lst") == 0 || matches(*argv, "list") == 0) return ipaddr_list_link(argc-1, argv+1); if (matches(*argv, "help") == 0) usage(); } else return ipaddr_list_link(0, NULL); fprintf(stderr, "Command \"%s\" is unknown, try \"ip link help\".\n", *argv); exit(-1); }