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-rw-r--r--ip/iplink.c1864
1 files changed, 1864 insertions, 0 deletions
diff --git a/ip/iplink.c b/ip/iplink.c
new file mode 100644
index 0000000..e94dc6a
--- /dev/null
+++ b/ip/iplink.c
@@ -0,0 +1,1864 @@
+/*
+ * 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 <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 <stdbool.h>
+#include <linux/mpls.h>
+
+#include "rt_names.h"
+#include "utils.h"
+#include "ip_common.h"
+#include "namespace.h"
+
+#define IPLINK_IOCTL_COMPAT 1
+
+#ifndef GSO_MAX_SEGS
+#define GSO_MAX_SEGS 65535
+#endif
+
+
+static void usage(void) __attribute__((noreturn));
+static int iplink_have_newlink(void);
+
+void iplink_types_usage(void)
+{
+ /* Remember to add new entry here if new type is added. */
+ fprintf(stderr,
+ "TYPE := { amt | bareudp | bond | bond_slave | bridge | bridge_slave |\n"
+ " dsa | dummy | erspan | geneve | gre | gretap | gtp | ifb |\n"
+ " ip6erspan | ip6gre | ip6gretap | ip6tnl |\n"
+ " ipip | ipoib | ipvlan | ipvtap |\n"
+ " macsec | macvlan | macvtap |\n"
+ " netdevsim | nlmon | rmnet | sit | team | team_slave |\n"
+ " vcan | veth | vlan | vrf | vti | vxcan | vxlan | wwan |\n"
+ " xfrm | virt_wifi }\n");
+}
+
+void iplink_usage(void)
+{
+ if (iplink_have_newlink()) {
+ fprintf(stderr,
+ "Usage: ip link add [link DEV | parentdev NAME] [ name ] NAME\n"
+ " [ txqueuelen PACKETS ]\n"
+ " [ address LLADDR ]\n"
+ " [ broadcast LLADDR ]\n"
+ " [ mtu MTU ] [index IDX ]\n"
+ " [ numtxqueues QUEUE_COUNT ]\n"
+ " [ numrxqueues QUEUE_COUNT ]\n"
+ " [ netns { PID | NAME } ]\n"
+ " type TYPE [ ARGS ]\n"
+ "\n"
+ " ip link delete { DEVICE | dev DEVICE | group DEVGROUP } type TYPE [ ARGS ]\n"
+ "\n"
+ " ip link set { DEVICE | dev DEVICE | group DEVGROUP }\n"
+ " [ { up | down } ]\n"
+ " [ type TYPE ARGS ]\n");
+ } else
+ fprintf(stderr,
+ "Usage: ip link set DEVICE [ { up | down } ]\n");
+
+ fprintf(stderr,
+ " [ arp { on | off } ]\n"
+ " [ dynamic { on | off } ]\n"
+ " [ multicast { on | off } ]\n"
+ " [ allmulticast { on | off } ]\n"
+ " [ promisc { on | off } ]\n"
+ " [ trailers { on | off } ]\n"
+ " [ carrier { on | off } ]\n"
+ " [ txqueuelen PACKETS ]\n"
+ " [ name NEWNAME ]\n"
+ " [ address LLADDR ]\n"
+ " [ broadcast LLADDR ]\n"
+ " [ mtu MTU ]\n"
+ " [ netns { PID | NAME } ]\n"
+ " [ link-netns NAME | link-netnsid ID ]\n"
+ " [ alias NAME ]\n"
+ " [ vf NUM [ mac LLADDR ]\n"
+ " [ vlan VLANID [ qos VLAN-QOS ] [ proto VLAN-PROTO ] ]\n"
+ " [ rate TXRATE ]\n"
+ " [ max_tx_rate TXRATE ]\n"
+ " [ min_tx_rate TXRATE ]\n"
+ " [ spoofchk { on | off} ]\n"
+ " [ query_rss { on | off} ]\n"
+ " [ state { auto | enable | disable} ]\n"
+ " [ trust { on | off} ]\n"
+ " [ node_guid EUI64 ]\n"
+ " [ port_guid EUI64 ] ]\n"
+ " [ { xdp | xdpgeneric | xdpdrv | xdpoffload } { off |\n"
+#ifdef HAVE_LIBBPF
+ " object FILE [ { section | program } NAME ] [ verbose ] |\n"
+#else
+ " object FILE [ section NAME ] [ verbose ] |\n"
+#endif
+ " pinned FILE } ]\n"
+ " [ master DEVICE ][ vrf NAME ]\n"
+ " [ nomaster ]\n"
+ " [ addrgenmode { eui64 | none | stable_secret | random } ]\n"
+ " [ protodown { on | off } ]\n"
+ " [ protodown_reason PREASON { on | off } ]\n"
+ " [ gso_max_size BYTES ] | [ gso_max_segs PACKETS ]\n"
+ " [ gro_max_size BYTES ]\n"
+ "\n"
+ " ip link show [ DEVICE | group GROUP ] [up] [master DEV] [vrf NAME] [type TYPE]\n"
+ " [nomaster]\n"
+ "\n"
+ " ip link xstats type TYPE [ ARGS ]\n"
+ "\n"
+ " ip link afstats [ dev DEVICE ]\n"
+ " ip link property add dev DEVICE [ altname NAME .. ]\n"
+ " ip link property del dev DEVICE [ altname NAME .. ]\n");
+
+ if (iplink_have_newlink()) {
+ fprintf(stderr,
+ "\n"
+ " ip link help [ TYPE ]\n"
+ "\n");
+ iplink_types_usage();
+ }
+ exit(-1);
+}
+
+static void usage(void)
+{
+ iplink_usage();
+}
+
+static int on_off(const char *msg, const char *realval)
+{
+ fprintf(stderr,
+ "Error: argument of \"%s\" must be \"on\" or \"off\", not \"%s\"\n",
+ msg, realval);
+ 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), "%s/link_%s.so", get_ip_lib_dir(), 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;
+}
+
+static int get_link_mode(const char *mode)
+{
+ if (strcasecmp(mode, "default") == 0)
+ return IF_LINK_MODE_DEFAULT;
+ if (strcasecmp(mode, "dormant") == 0)
+ return IF_LINK_MODE_DORMANT;
+ return -1;
+}
+
+static int get_addr_gen_mode(const char *mode)
+{
+ if (strcasecmp(mode, "eui64") == 0)
+ return IN6_ADDR_GEN_MODE_EUI64;
+ if (strcasecmp(mode, "none") == 0)
+ return IN6_ADDR_GEN_MODE_NONE;
+ if (strcasecmp(mode, "stable_secret") == 0)
+ return IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
+ if (strcasecmp(mode, "random") == 0)
+ return IN6_ADDR_GEN_MODE_RANDOM;
+ return -1;
+}
+
+#if IPLINK_IOCTL_COMPAT
+static int have_rtnl_newlink = -1;
+
+static int accept_msg(struct rtnl_ctrl_data *ctrl,
+ 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 = {
+ .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
+ .n.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK,
+ .n.nlmsg_type = RTM_NEWLINK,
+ .i.ifi_family = AF_UNSPEC,
+ };
+
+ if (have_rtnl_newlink < 0) {
+ if (rtnl_send(&rth, &req.n, req.n.nlmsg_len) < 0) {
+ perror("request send failed");
+ exit(1);
+ }
+ 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 */
+
+static int nl_get_ll_addr_len(const char *ifname)
+{
+ int len;
+ int dev_index = ll_name_to_index(ifname);
+ struct iplink_req req = {
+ .n = {
+ .nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
+ .nlmsg_type = RTM_GETLINK,
+ .nlmsg_flags = NLM_F_REQUEST
+ },
+ .i = {
+ .ifi_family = preferred_family,
+ .ifi_index = dev_index,
+ }
+ };
+ struct nlmsghdr *answer;
+ struct rtattr *tb[IFLA_MAX+1];
+
+ if (dev_index == 0)
+ return -1;
+
+ if (rtnl_talk(&rth, &req.n, &answer) < 0)
+ return -1;
+
+ len = answer->nlmsg_len - NLMSG_LENGTH(sizeof(struct ifinfomsg));
+ if (len < 0) {
+ free(answer);
+ return -1;
+ }
+
+ parse_rtattr_flags(tb, IFLA_MAX, IFLA_RTA(NLMSG_DATA(answer)),
+ len, NLA_F_NESTED);
+ if (!tb[IFLA_ADDRESS]) {
+ free(answer);
+ return -1;
+ }
+
+ len = RTA_PAYLOAD(tb[IFLA_ADDRESS]);
+ free(answer);
+ return len;
+}
+
+static void iplink_parse_vf_vlan_info(int vf, int *argcp, char ***argvp,
+ struct ifla_vf_vlan_info *ivvip)
+{
+ int argc = *argcp;
+ char **argv = *argvp;
+ unsigned int vci;
+
+ NEXT_ARG();
+ if (get_unsigned(&vci, *argv, 0) || vci > 4095)
+ invarg("Invalid \"vlan\" value\n", *argv);
+
+ ivvip->vlan = vci;
+ ivvip->vf = vf;
+ ivvip->qos = 0;
+ ivvip->vlan_proto = htons(ETH_P_8021Q);
+ if (NEXT_ARG_OK()) {
+ NEXT_ARG();
+ if (matches(*argv, "qos") == 0) {
+ NEXT_ARG();
+ if (get_unsigned(&ivvip->qos, *argv, 0))
+ invarg("Invalid \"qos\" value\n", *argv);
+ } else {
+ /* rewind arg */
+ PREV_ARG();
+ }
+ }
+ if (NEXT_ARG_OK()) {
+ NEXT_ARG();
+ if (matches(*argv, "proto") == 0) {
+ NEXT_ARG();
+ if (ll_proto_a2n(&ivvip->vlan_proto, *argv))
+ invarg("protocol is invalid\n", *argv);
+ if (ivvip->vlan_proto != htons(ETH_P_8021AD) &&
+ ivvip->vlan_proto != htons(ETH_P_8021Q)) {
+ SPRINT_BUF(b1);
+ SPRINT_BUF(b2);
+ char msg[64 + sizeof(b1) + sizeof(b2)];
+
+ sprintf(msg,
+ "Invalid \"vlan protocol\" value - supported %s, %s\n",
+ ll_proto_n2a(htons(ETH_P_8021Q),
+ b1, sizeof(b1)),
+ ll_proto_n2a(htons(ETH_P_8021AD),
+ b2, sizeof(b2)));
+ invarg(msg, *argv);
+ }
+ } else {
+ /* rewind arg */
+ PREV_ARG();
+ }
+ }
+
+ *argcp = argc;
+ *argvp = argv;
+}
+
+static int iplink_parse_vf(int vf, int *argcp, char ***argvp,
+ struct iplink_req *req, const char *dev)
+{
+ char new_rate_api = 0, count = 0, override_legacy_rate = 0;
+ struct ifla_vf_rate tivt;
+ int len, argc = *argcp;
+ char **argv = *argvp;
+ struct rtattr *vfinfo;
+ int ret;
+
+ tivt.min_tx_rate = -1;
+ tivt.max_tx_rate = -1;
+
+ vfinfo = addattr_nest(&req->n, sizeof(*req), IFLA_VF_INFO);
+
+ while (NEXT_ARG_OK()) {
+ NEXT_ARG();
+ count++;
+ if (!matches(*argv, "max_tx_rate")) {
+ /* new API in use */
+ new_rate_api = 1;
+ /* override legacy rate */
+ override_legacy_rate = 1;
+ } else if (!matches(*argv, "min_tx_rate")) {
+ /* new API in use */
+ new_rate_api = 1;
+ }
+ }
+
+ while (count--) {
+ /* rewind arg */
+ PREV_ARG();
+ }
+
+ while (NEXT_ARG_OK()) {
+ NEXT_ARG();
+ if (matches(*argv, "mac") == 0) {
+ struct ifla_vf_mac ivm = { 0 };
+ int halen = nl_get_ll_addr_len(dev);
+
+ NEXT_ARG();
+ ivm.vf = vf;
+ len = ll_addr_a2n((char *)ivm.mac, 32, *argv);
+ if (len < 0)
+ return -1;
+ if (halen > 0 && len != halen) {
+ fprintf(stderr,
+ "Invalid address length %d - must be %d bytes\n",
+ len, halen);
+ return -1;
+ }
+ addattr_l(&req->n, sizeof(*req), IFLA_VF_MAC,
+ &ivm, sizeof(ivm));
+ } else if (matches(*argv, "vlan") == 0) {
+ struct ifla_vf_vlan_info ivvi;
+
+ iplink_parse_vf_vlan_info(vf, &argc, &argv, &ivvi);
+ /* support the old interface in case of older kernel*/
+ if (ivvi.vlan_proto == htons(ETH_P_8021Q)) {
+ struct ifla_vf_vlan ivv;
+
+ ivv.vf = ivvi.vf;
+ ivv.vlan = ivvi.vlan;
+ ivv.qos = ivvi.qos;
+ addattr_l(&req->n, sizeof(*req),
+ IFLA_VF_VLAN, &ivv, sizeof(ivv));
+ } else {
+ struct rtattr *vfvlanlist;
+
+ vfvlanlist = addattr_nest(&req->n, sizeof(*req),
+ IFLA_VF_VLAN_LIST);
+ addattr_l(&req->n, sizeof(*req),
+ IFLA_VF_VLAN_INFO, &ivvi,
+ sizeof(ivvi));
+
+ while (NEXT_ARG_OK()) {
+ NEXT_ARG();
+ if (matches(*argv, "vlan") != 0) {
+ PREV_ARG();
+ break;
+ }
+ iplink_parse_vf_vlan_info(vf, &argc,
+ &argv, &ivvi);
+ addattr_l(&req->n, sizeof(*req),
+ IFLA_VF_VLAN_INFO, &ivvi,
+ sizeof(ivvi));
+ }
+ addattr_nest_end(&req->n, vfvlanlist);
+ }
+ } 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;
+ if (!new_rate_api)
+ addattr_l(&req->n, sizeof(*req),
+ IFLA_VF_TX_RATE, &ivt, sizeof(ivt));
+ else if (!override_legacy_rate)
+ tivt.max_tx_rate = ivt.rate;
+
+ } else if (matches(*argv, "max_tx_rate") == 0) {
+ NEXT_ARG();
+ if (get_unsigned(&tivt.max_tx_rate, *argv, 0))
+ invarg("Invalid \"max tx rate\" value\n",
+ *argv);
+ tivt.vf = vf;
+
+ } else if (matches(*argv, "min_tx_rate") == 0) {
+ NEXT_ARG();
+ if (get_unsigned(&tivt.min_tx_rate, *argv, 0))
+ invarg("Invalid \"min tx rate\" value\n",
+ *argv);
+ tivt.vf = vf;
+
+ } else if (matches(*argv, "spoofchk") == 0) {
+ struct ifla_vf_spoofchk ivs;
+
+ NEXT_ARG();
+ ivs.setting = parse_on_off("spoofchk", *argv, &ret);
+ if (ret)
+ return ret;
+ ivs.vf = vf;
+ addattr_l(&req->n, sizeof(*req), IFLA_VF_SPOOFCHK,
+ &ivs, sizeof(ivs));
+
+ } else if (matches(*argv, "query_rss") == 0) {
+ struct ifla_vf_rss_query_en ivs;
+
+ NEXT_ARG();
+ ivs.setting = parse_on_off("query_rss", *argv, &ret);
+ if (ret)
+ return ret;
+ ivs.vf = vf;
+ addattr_l(&req->n, sizeof(*req), IFLA_VF_RSS_QUERY_EN,
+ &ivs, sizeof(ivs));
+
+ } else if (matches(*argv, "trust") == 0) {
+ struct ifla_vf_trust ivt;
+
+ NEXT_ARG();
+ ivt.setting = parse_on_off("trust", *argv, &ret);
+ if (ret)
+ return ret;
+ ivt.vf = vf;
+ addattr_l(&req->n, sizeof(*req), IFLA_VF_TRUST,
+ &ivt, sizeof(ivt));
+
+ } else if (matches(*argv, "state") == 0) {
+ struct ifla_vf_link_state ivl;
+
+ NEXT_ARG();
+ if (matches(*argv, "auto") == 0)
+ ivl.link_state = IFLA_VF_LINK_STATE_AUTO;
+ else if (matches(*argv, "enable") == 0)
+ ivl.link_state = IFLA_VF_LINK_STATE_ENABLE;
+ else if (matches(*argv, "disable") == 0)
+ ivl.link_state = IFLA_VF_LINK_STATE_DISABLE;
+ else
+ invarg("Invalid \"state\" value\n", *argv);
+ ivl.vf = vf;
+ addattr_l(&req->n, sizeof(*req), IFLA_VF_LINK_STATE,
+ &ivl, sizeof(ivl));
+ } else if (matches(*argv, "node_guid") == 0) {
+ struct ifla_vf_guid ivg;
+
+ NEXT_ARG();
+ ivg.vf = vf;
+ if (get_guid(&ivg.guid, *argv)) {
+ invarg("Invalid GUID format\n", *argv);
+ return -1;
+ }
+ addattr_l(&req->n, sizeof(*req), IFLA_VF_IB_NODE_GUID,
+ &ivg, sizeof(ivg));
+ } else if (matches(*argv, "port_guid") == 0) {
+ struct ifla_vf_guid ivg;
+
+ NEXT_ARG();
+ ivg.vf = vf;
+ if (get_guid(&ivg.guid, *argv)) {
+ invarg("Invalid GUID format\n", *argv);
+ return -1;
+ }
+ addattr_l(&req->n, sizeof(*req), IFLA_VF_IB_PORT_GUID,
+ &ivg, sizeof(ivg));
+ } else {
+ /* rewind arg */
+ PREV_ARG();
+ break;
+ }
+ }
+
+ if (new_rate_api) {
+ int tmin, tmax;
+
+ if (tivt.min_tx_rate == -1 || tivt.max_tx_rate == -1) {
+ ipaddr_get_vf_rate(tivt.vf, &tmin, &tmax, dev);
+ if (tivt.min_tx_rate == -1)
+ tivt.min_tx_rate = tmin;
+ if (tivt.max_tx_rate == -1)
+ tivt.max_tx_rate = tmax;
+ }
+
+ if (tivt.max_tx_rate && tivt.min_tx_rate > tivt.max_tx_rate) {
+ fprintf(stderr,
+ "Invalid min_tx_rate %d - must be <= max_tx_rate %d\n",
+ tivt.min_tx_rate, tivt.max_tx_rate);
+ return -1;
+ }
+
+ addattr_l(&req->n, sizeof(*req), IFLA_VF_RATE, &tivt,
+ sizeof(tivt));
+ }
+
+ 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 **type)
+{
+ bool move_netns = false;
+ char *name = NULL;
+ char *dev = NULL;
+ char *link = NULL;
+ int ret, len;
+ char abuf[32];
+ int qlen = -1;
+ int mtu = -1;
+ int netns = -1;
+ int vf = -1;
+ int numtxqueues = -1;
+ int numrxqueues = -1;
+ int link_netnsid = -1;
+ int index = 0;
+ int group = -1;
+ int addr_len = 0;
+ int err;
+
+ 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();
+ if (name)
+ duparg("name", *argv);
+ if (check_ifname(*argv))
+ invarg("\"name\" not a valid ifname", *argv);
+ name = *argv;
+ if (!dev)
+ dev = name;
+ } else if (strcmp(*argv, "index") == 0) {
+ NEXT_ARG();
+ if (index)
+ duparg("index", *argv);
+ index = atoi(*argv);
+ if (index <= 0)
+ invarg("Invalid \"index\" value", *argv);
+ } else if (matches(*argv, "link") == 0) {
+ NEXT_ARG();
+ link = *argv;
+ } else if (matches(*argv, "address") == 0) {
+ NEXT_ARG();
+ addr_len = ll_addr_a2n(abuf, sizeof(abuf), *argv);
+ if (addr_len < 0)
+ return -1;
+ addattr_l(&req->n, sizeof(*req),
+ IFLA_ADDRESS, abuf, addr_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, "xdpgeneric") == 0 ||
+ strcmp(*argv, "xdpdrv") == 0 ||
+ strcmp(*argv, "xdpoffload") == 0 ||
+ strcmp(*argv, "xdp") == 0) {
+ bool generic = strcmp(*argv, "xdpgeneric") == 0;
+ bool drv = strcmp(*argv, "xdpdrv") == 0;
+ bool offload = strcmp(*argv, "xdpoffload") == 0;
+
+ NEXT_ARG();
+ if (xdp_parse(&argc, &argv, req, dev,
+ generic, drv, offload))
+ exit(-1);
+
+ if (offload && name == dev)
+ dev = NULL;
+ } else if (strcmp(*argv, "netns") == 0) {
+ NEXT_ARG();
+ if (netns != -1)
+ duparg("netns", *argv);
+ netns = netns_get_fd(*argv);
+ if (netns >= 0)
+ addattr_l(&req->n, sizeof(*req), IFLA_NET_NS_FD,
+ &netns, 4);
+ else if (get_integer(&netns, *argv, 0) == 0)
+ addattr_l(&req->n, sizeof(*req),
+ IFLA_NET_NS_PID, &netns, 4);
+ else
+ invarg("Invalid \"netns\" value\n", *argv);
+ move_netns = true;
+ } 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", *argv);
+ } 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", *argv);
+ } 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", *argv);
+ } 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", *argv);
+ } 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("arp", *argv);
+ } else if (strcmp(*argv, "carrier") == 0) {
+ int carrier;
+
+ NEXT_ARG();
+ carrier = parse_on_off("carrier", *argv, &err);
+ if (err)
+ return err;
+
+ addattr8(&req->n, sizeof(*req), IFLA_CARRIER, carrier);
+ } 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);
+ if (!dev)
+ missarg("dev");
+
+ len = iplink_parse_vf(vf, &argc, &argv, req, dev);
+ if (len < 0)
+ return -1;
+ addattr_nest_end(&req->n, vflist);
+
+ if (name == dev)
+ dev = NULL;
+ } else if (matches(*argv, "master") == 0) {
+ int ifindex;
+
+ NEXT_ARG();
+ ifindex = ll_name_to_index(*argv);
+ if (!ifindex)
+ invarg("Device does not exist\n", *argv);
+ addattr_l(&req->n, sizeof(*req), IFLA_MASTER,
+ &ifindex, 4);
+ } else if (strcmp(*argv, "vrf") == 0) {
+ int ifindex;
+
+ NEXT_ARG();
+ ifindex = ll_name_to_index(*argv);
+ if (!ifindex)
+ invarg("Not a valid VRF name\n", *argv);
+ if (!name_is_vrf(*argv))
+ invarg("Not a valid VRF name\n", *argv);
+ addattr_l(&req->n, sizeof(*req), IFLA_MASTER,
+ &ifindex, sizeof(ifindex));
+ } else if (matches(*argv, "nomaster") == 0) {
+ int ifindex = 0;
+
+ addattr_l(&req->n, sizeof(*req), IFLA_MASTER,
+ &ifindex, 4);
+ } 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", *argv);
+ } else if (matches(*argv, "type") == 0) {
+ NEXT_ARG();
+ *type = *argv;
+ argc--; argv++;
+ break;
+ } else if (matches(*argv, "alias") == 0) {
+ NEXT_ARG();
+ len = strlen(*argv);
+ if (len >= IFALIASZ)
+ invarg("alias too long\n", *argv);
+ addattr_l(&req->n, sizeof(*req), IFLA_IFALIAS,
+ *argv, len);
+ } else if (strcmp(*argv, "group") == 0) {
+ NEXT_ARG();
+ if (group != -1)
+ duparg("group", *argv);
+ if (rtnl_group_a2n(&group, *argv))
+ invarg("Invalid \"group\" value\n", *argv);
+ addattr32(&req->n, sizeof(*req), IFLA_GROUP, group);
+ } else if (strcmp(*argv, "mode") == 0) {
+ int mode;
+
+ NEXT_ARG();
+ mode = get_link_mode(*argv);
+ if (mode < 0)
+ invarg("Invalid link mode\n", *argv);
+ addattr8(&req->n, sizeof(*req), IFLA_LINKMODE, mode);
+ } else if (strcmp(*argv, "state") == 0) {
+ int state;
+
+ NEXT_ARG();
+ state = get_operstate(*argv);
+ if (state < 0)
+ invarg("Invalid operstate\n", *argv);
+
+ addattr8(&req->n, sizeof(*req), IFLA_OPERSTATE, state);
+ } else if (matches(*argv, "numtxqueues") == 0) {
+ NEXT_ARG();
+ if (numtxqueues != -1)
+ duparg("numtxqueues", *argv);
+ if (get_integer(&numtxqueues, *argv, 0))
+ invarg("Invalid \"numtxqueues\" value\n",
+ *argv);
+ addattr_l(&req->n, sizeof(*req), IFLA_NUM_TX_QUEUES,
+ &numtxqueues, 4);
+ } else if (matches(*argv, "numrxqueues") == 0) {
+ NEXT_ARG();
+ if (numrxqueues != -1)
+ duparg("numrxqueues", *argv);
+ if (get_integer(&numrxqueues, *argv, 0))
+ invarg("Invalid \"numrxqueues\" value\n",
+ *argv);
+ addattr_l(&req->n, sizeof(*req), IFLA_NUM_RX_QUEUES,
+ &numrxqueues, 4);
+ } else if (matches(*argv, "addrgenmode") == 0) {
+ struct rtattr *afs, *afs6;
+ int mode;
+
+ NEXT_ARG();
+ mode = get_addr_gen_mode(*argv);
+ if (mode < 0)
+ invarg("Invalid address generation mode\n",
+ *argv);
+ afs = addattr_nest(&req->n, sizeof(*req), IFLA_AF_SPEC);
+ afs6 = addattr_nest(&req->n, sizeof(*req), AF_INET6);
+ addattr8(&req->n, sizeof(*req),
+ IFLA_INET6_ADDR_GEN_MODE, mode);
+ addattr_nest_end(&req->n, afs6);
+ addattr_nest_end(&req->n, afs);
+ } else if (matches(*argv, "link-netns") == 0) {
+ NEXT_ARG();
+ if (link_netnsid != -1)
+ duparg("link-netns/link-netnsid", *argv);
+ link_netnsid = get_netnsid_from_name(*argv);
+ /* No nsid? Try to assign one. */
+ if (link_netnsid < 0)
+ set_netnsid_from_name(*argv, -1);
+ link_netnsid = get_netnsid_from_name(*argv);
+ if (link_netnsid < 0)
+ invarg("Invalid \"link-netns\" value\n",
+ *argv);
+ addattr32(&req->n, sizeof(*req), IFLA_LINK_NETNSID,
+ link_netnsid);
+ } else if (matches(*argv, "link-netnsid") == 0) {
+ NEXT_ARG();
+ if (link_netnsid != -1)
+ duparg("link-netns/link-netnsid", *argv);
+ if (get_integer(&link_netnsid, *argv, 0))
+ invarg("Invalid \"link-netnsid\" value\n",
+ *argv);
+ addattr32(&req->n, sizeof(*req), IFLA_LINK_NETNSID,
+ link_netnsid);
+ } else if (strcmp(*argv, "protodown") == 0) {
+ unsigned int proto_down;
+
+ NEXT_ARG();
+ proto_down = parse_on_off("protodown", *argv, &err);
+ if (err)
+ return err;
+ addattr8(&req->n, sizeof(*req), IFLA_PROTO_DOWN,
+ proto_down);
+ } else if (strcmp(*argv, "protodown_reason") == 0) {
+ struct rtattr *pr;
+ __u32 preason = 0, prvalue = 0, prmask = 0;
+
+ NEXT_ARG();
+ if (protodown_reason_a2n(&preason, *argv))
+ invarg("invalid protodown reason\n", *argv);
+ NEXT_ARG();
+ prmask = 1 << preason;
+ if (matches(*argv, "on") == 0)
+ prvalue |= prmask;
+ else if (matches(*argv, "off") == 0)
+ prvalue &= ~prmask;
+ else
+ return on_off("protodown_reason", *argv);
+ pr = addattr_nest(&req->n, sizeof(*req),
+ IFLA_PROTO_DOWN_REASON | NLA_F_NESTED);
+ addattr32(&req->n, sizeof(*req),
+ IFLA_PROTO_DOWN_REASON_MASK, prmask);
+ addattr32(&req->n, sizeof(*req),
+ IFLA_PROTO_DOWN_REASON_VALUE, prvalue);
+ addattr_nest_end(&req->n, pr);
+ } else if (strcmp(*argv, "gso_max_size") == 0) {
+ unsigned int max_size;
+
+ NEXT_ARG();
+ if (get_unsigned(&max_size, *argv, 0))
+ invarg("Invalid \"gso_max_size\" value\n",
+ *argv);
+ addattr32(&req->n, sizeof(*req),
+ IFLA_GSO_MAX_SIZE, max_size);
+ } else if (strcmp(*argv, "gso_max_segs") == 0) {
+ unsigned int max_segs;
+
+ NEXT_ARG();
+ if (get_unsigned(&max_segs, *argv, 0) ||
+ max_segs > GSO_MAX_SEGS)
+ invarg("Invalid \"gso_max_segs\" value\n",
+ *argv);
+ addattr32(&req->n, sizeof(*req),
+ IFLA_GSO_MAX_SEGS, max_segs);
+ } else if (strcmp(*argv, "gro_max_size") == 0) {
+ unsigned int max_size;
+
+ NEXT_ARG();
+ if (get_unsigned(&max_size, *argv, 0))
+ invarg("Invalid \"gro_max_size\" value\n",
+ *argv);
+ addattr32(&req->n, sizeof(*req),
+ IFLA_GRO_MAX_SIZE, max_size);
+ } else if (strcmp(*argv, "parentdev") == 0) {
+ NEXT_ARG();
+ addattr_l(&req->n, sizeof(*req), IFLA_PARENT_DEV_NAME,
+ *argv, strlen(*argv) + 1);
+ } else {
+ if (matches(*argv, "help") == 0)
+ usage();
+
+ if (strcmp(*argv, "dev") == 0)
+ NEXT_ARG();
+ if (dev != name)
+ duparg2("dev", *argv);
+ if (check_altifname(*argv))
+ invarg("\"dev\" not a valid ifname", *argv);
+ dev = *argv;
+ }
+ argc--; argv++;
+ }
+
+ ret -= argc;
+
+ /* Allow "ip link add dev" and "ip link add name" */
+ if (!name)
+ name = dev;
+ else if (!dev)
+ dev = name;
+ else if (!strcmp(name, dev))
+ name = dev;
+
+ if (dev && addr_len &&
+ !(req->n.nlmsg_flags & NLM_F_CREATE)) {
+ int halen = nl_get_ll_addr_len(dev);
+
+ if (halen >= 0 && halen != addr_len) {
+ fprintf(stderr,
+ "Invalid address length %d - must be %d bytes\n",
+ addr_len, halen);
+ return -1;
+ }
+ }
+
+ if (index &&
+ (!(req->n.nlmsg_flags & NLM_F_CREATE) &&
+ !move_netns)) {
+ fprintf(stderr,
+ "index can be used only when creating devices or when moving device to another netns.\n");
+ exit(-1);
+ }
+
+ if (group != -1) {
+ if (!dev) {
+ if (argc) {
+ fprintf(stderr,
+ "Garbage instead of arguments \"%s ...\". Try \"ip link help\".\n",
+ *argv);
+ exit(-1);
+ }
+ if (req->n.nlmsg_flags & NLM_F_CREATE) {
+ fprintf(stderr,
+ "group cannot be used when creating devices.\n");
+ exit(-1);
+ }
+
+ *type = NULL;
+ return ret;
+ }
+ }
+
+ if (!(req->n.nlmsg_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)
+ return nodev(dev);
+
+ /* Not renaming to the same name */
+ if (name == dev)
+ name = NULL;
+
+ if (index)
+ addattr32(&req->n, sizeof(*req), IFLA_NEW_IFINDEX, index);
+ } else {
+ if (name != dev) {
+ fprintf(stderr,
+ "both \"name\" and \"dev\" cannot be used when creating devices.\n");
+ exit(-1);
+ }
+
+ if (link) {
+ int ifindex;
+
+ ifindex = ll_name_to_index(link);
+ if (!ifindex)
+ return nodev(link);
+ addattr32(&req->n, sizeof(*req), IFLA_LINK, ifindex);
+ }
+
+ req->i.ifi_index = index;
+ }
+
+ if (name) {
+ addattr_l(&req->n, sizeof(*req),
+ IFLA_IFNAME, name, strlen(name) + 1);
+ }
+
+ return ret;
+}
+
+static int iplink_modify(int cmd, unsigned int flags, int argc, char **argv)
+{
+ char *type = NULL;
+ struct iplink_req req = {
+ .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
+ .n.nlmsg_flags = NLM_F_REQUEST | flags,
+ .n.nlmsg_type = cmd,
+ .i.ifi_family = preferred_family,
+ };
+ int ret;
+
+ ret = iplink_parse(argc, argv, &req, &type);
+ if (ret < 0)
+ return ret;
+
+ if (type) {
+ struct link_util *lu;
+ struct rtattr *linkinfo;
+ char *ulinep = strchr(type, '_');
+ int iflatype;
+
+ linkinfo = addattr_nest(&req.n, sizeof(req), IFLA_LINKINFO);
+ addattr_l(&req.n, sizeof(req), IFLA_INFO_KIND, type,
+ strlen(type));
+
+ lu = get_link_kind(type);
+ if (ulinep && !strcmp(ulinep, "_slave"))
+ iflatype = IFLA_INFO_SLAVE_DATA;
+ else
+ iflatype = IFLA_INFO_DATA;
+
+ argc -= ret;
+ argv += ret;
+
+ if (lu && argc) {
+ struct rtattr *data;
+
+ data = addattr_nest(&req.n, sizeof(req), iflatype);
+
+ if (lu->parse_opt &&
+ lu->parse_opt(lu, argc, argv, &req.n))
+ return -1;
+
+ addattr_nest_end(&req.n, 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;
+ }
+ addattr_nest_end(&req.n, linkinfo);
+ } else if (flags & NLM_F_CREATE) {
+ fprintf(stderr,
+ "Not enough information: \"type\" argument is required\n");
+ return -1;
+ }
+
+ if (echo_request)
+ ret = rtnl_echo_talk(&rth, &req.n, json, print_linkinfo);
+ else
+ ret = rtnl_talk(&rth, &req.n, NULL);
+
+ if (ret)
+ return -2;
+
+ /* remove device from cache; next use can refresh with new data */
+ ll_drop_by_index(req.i.ifi_index);
+
+ return 0;
+}
+
+int iplink_get(char *name, __u32 filt_mask)
+{
+ struct iplink_req req = {
+ .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
+ .n.nlmsg_flags = NLM_F_REQUEST,
+ .n.nlmsg_type = RTM_GETLINK,
+ .i.ifi_family = preferred_family,
+ };
+ struct nlmsghdr *answer;
+
+ if (name) {
+ addattr_l(&req.n, sizeof(req),
+ !check_ifname(name) ? IFLA_IFNAME : IFLA_ALT_IFNAME,
+ name, strlen(name) + 1);
+ }
+ addattr32(&req.n, sizeof(req), IFLA_EXT_MASK, filt_mask);
+
+ if (rtnl_talk(&rth, &req.n, &answer) < 0)
+ return -2;
+
+ open_json_object(NULL);
+ print_linkinfo(answer, stdout);
+ close_json_object();
+
+ free(answer);
+ 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;
+
+ strlcpy(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;
+
+ strlcpy(ifr.ifr_name, dev, IFNAMSIZ);
+ strlcpy(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 = { .ifr_qlen = qlen };
+ int s;
+
+ s = get_ctl_fd();
+ if (s < 0)
+ return -1;
+
+ strlcpy(ifr.ifr_name, dev, IFNAMSIZ);
+ 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 = { .ifr_mtu = mtu };
+ int s;
+
+ s = get_ctl_fd();
+ if (s < 0)
+ return -1;
+
+ strlcpy(ifr.ifr_name, dev, IFNAMSIZ);
+ 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 = {
+ .sll_family = AF_PACKET,
+ .sll_protocol = htons(ETH_P_LOOP),
+ };
+ socklen_t alen;
+ int s;
+
+ s = socket(PF_PACKET, SOCK_DGRAM, 0);
+ if (s < 0) {
+ perror("socket(PF_PACKET)");
+ return -1;
+ }
+
+ strlcpy(ifr.ifr_name, dev, IFNAMSIZ);
+ if (ioctl(s, SIOCGIFINDEX, &ifr) < 0) {
+ perror("SIOCGIFINDEX");
+ close(s);
+ return -1;
+ }
+
+ me.sll_ifindex = ifr.ifr_ifindex;
+ 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));
+ strlcpy(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();
+ if (check_ifname(*argv))
+ invarg("\"name\" not a valid ifname", *argv);
+ 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", *argv);
+ } 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", *argv);
+ } 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", *argv);
+ } 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", *argv);
+ } 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("arp", *argv);
+ } 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", *argv);
+ } else {
+ if (strcmp(*argv, "dev") == 0)
+ NEXT_ARG();
+ else if (matches(*argv, "help") == 0)
+ usage();
+
+ if (dev)
+ duparg2("dev", *argv);
+ if (check_ifname(*argv))
+ invarg("\"dev\" not a valid ifname", *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 (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 */
+
+void print_mpls_link_stats(FILE *fp, const struct mpls_link_stats *stats,
+ const char *indent)
+{
+ unsigned int cols[] = {
+ strlen("*X: bytes"),
+ strlen("packets"),
+ strlen("errors"),
+ strlen("dropped"),
+ strlen("noroute"),
+ };
+
+ if (is_json_context()) {
+ /* RX stats */
+ open_json_object("rx");
+ print_u64(PRINT_JSON, "bytes", NULL, stats->rx_bytes);
+ print_u64(PRINT_JSON, "packets", NULL, stats->rx_packets);
+ print_u64(PRINT_JSON, "errors", NULL, stats->rx_errors);
+ print_u64(PRINT_JSON, "dropped", NULL, stats->rx_dropped);
+ print_u64(PRINT_JSON, "noroute", NULL, stats->rx_noroute);
+ close_json_object();
+
+ /* TX stats */
+ open_json_object("tx");
+ print_u64(PRINT_JSON, "bytes", NULL, stats->tx_bytes);
+ print_u64(PRINT_JSON, "packets", NULL, stats->tx_packets);
+ print_u64(PRINT_JSON, "errors", NULL, stats->tx_errors);
+ print_u64(PRINT_JSON, "dropped", NULL, stats->tx_dropped);
+ close_json_object();
+ } else {
+ size_columns(cols, ARRAY_SIZE(cols), stats->rx_bytes,
+ stats->rx_packets, stats->rx_errors,
+ stats->rx_dropped, stats->rx_noroute);
+ size_columns(cols, ARRAY_SIZE(cols), stats->tx_bytes,
+ stats->tx_packets, stats->tx_errors,
+ stats->tx_dropped, 0);
+
+ fprintf(fp, "%sRX: %*s %*s %*s %*s %*s%s", indent,
+ cols[0] - 4, "bytes", cols[1], "packets",
+ cols[2], "errors", cols[3], "dropped",
+ cols[4], "noroute", _SL_);
+ fprintf(fp, "%s", indent);
+ print_num(fp, cols[0], stats->rx_bytes);
+ print_num(fp, cols[1], stats->rx_packets);
+ print_num(fp, cols[2], stats->rx_errors);
+ print_num(fp, cols[3], stats->rx_dropped);
+ print_num(fp, cols[4], stats->rx_noroute);
+ print_nl();
+
+ fprintf(fp, "%sTX: %*s %*s %*s %*s%s", indent,
+ cols[0] - 4, "bytes", cols[1], "packets",
+ cols[2], "errors", cols[3], "dropped", _SL_);
+ fprintf(fp, "%s", indent);
+ print_num(fp, cols[0], stats->tx_bytes);
+ print_num(fp, cols[1], stats->tx_packets);
+ print_num(fp, cols[2], stats->tx_errors);
+ print_num(fp, cols[3], stats->tx_dropped);
+ }
+}
+
+static void print_mpls_stats(FILE *fp, struct rtattr *attr)
+{
+ struct rtattr *mrtb[MPLS_STATS_MAX+1];
+ struct mpls_link_stats *stats;
+
+ parse_rtattr(mrtb, MPLS_STATS_MAX, RTA_DATA(attr),
+ RTA_PAYLOAD(attr));
+ if (!mrtb[MPLS_STATS_LINK])
+ return;
+
+ stats = RTA_DATA(mrtb[MPLS_STATS_LINK]);
+ print_string(PRINT_FP, NULL, " mpls:", NULL);
+ print_nl();
+ print_mpls_link_stats(fp, stats, " ");
+ print_string(PRINT_FP, NULL, "%s", "\n");
+ fflush(fp);
+}
+
+static void print_af_stats_attr(FILE *fp, int ifindex, struct rtattr *attr)
+{
+ bool if_printed = false;
+ struct rtattr *i;
+ int rem;
+
+ rem = RTA_PAYLOAD(attr);
+ for (i = RTA_DATA(attr); RTA_OK(i, rem); i = RTA_NEXT(i, rem)) {
+ if (preferred_family != AF_UNSPEC &&
+ i->rta_type != preferred_family)
+ continue;
+
+ if (!if_printed) {
+ print_uint(PRINT_ANY, "ifindex",
+ "%u:", ifindex);
+ print_color_string(PRINT_ANY, COLOR_IFNAME,
+ "ifname", "%s",
+ ll_index_to_name(ifindex));
+ print_nl();
+ if_printed = true;
+ }
+
+ switch (i->rta_type) {
+ case AF_MPLS:
+ print_mpls_stats(fp, i);
+ break;
+ default:
+ fprintf(stderr, " unknown af(%d)\n", i->rta_type);
+ break;
+ }
+ }
+}
+
+struct af_stats_ctx {
+ FILE *fp;
+ int ifindex;
+};
+
+static int print_af_stats(struct nlmsghdr *n, void *arg)
+{
+ struct if_stats_msg *ifsm = NLMSG_DATA(n);
+ struct rtattr *tb[IFLA_STATS_MAX+1];
+ int len = n->nlmsg_len;
+ struct af_stats_ctx *ctx = arg;
+ FILE *fp = ctx->fp;
+
+ len -= NLMSG_LENGTH(sizeof(*ifsm));
+ if (len < 0) {
+ fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
+ return -1;
+ }
+
+ if (ctx->ifindex && ifsm->ifindex != ctx->ifindex)
+ return 0;
+
+ parse_rtattr(tb, IFLA_STATS_MAX, IFLA_STATS_RTA(ifsm), len);
+
+ if (tb[IFLA_STATS_AF_SPEC])
+ print_af_stats_attr(fp, ifsm->ifindex, tb[IFLA_STATS_AF_SPEC]);
+
+ fflush(fp);
+ return 0;
+}
+
+static int iplink_afstats(int argc, char **argv)
+{
+ __u32 filt_mask = IFLA_STATS_FILTER_BIT(IFLA_STATS_AF_SPEC);
+ const char *filter_dev = NULL;
+ struct af_stats_ctx ctx = {
+ .fp = stdout,
+ .ifindex = 0,
+ };
+
+ while (argc > 0) {
+ if (strcmp(*argv, "dev") == 0) {
+ NEXT_ARG();
+ if (filter_dev)
+ duparg2("dev", *argv);
+ filter_dev = *argv;
+ } else if (matches(*argv, "help") == 0) {
+ usage();
+ } else {
+ fprintf(stderr,
+ "Command \"%s\" is unknown, try \"ip link help\".\n",
+ *argv);
+ exit(-1);
+ }
+
+ argv++; argc--;
+ }
+
+ if (filter_dev) {
+ ctx.ifindex = ll_name_to_index(filter_dev);
+ if (ctx.ifindex <= 0) {
+ fprintf(stderr,
+ "Device \"%s\" does not exist.\n",
+ filter_dev);
+ return -1;
+ }
+ }
+
+ new_json_obj(json);
+
+ if (rtnl_statsdump_req_filter(&rth, AF_UNSPEC, filt_mask,
+ NULL, NULL) < 0) {
+ perror("Cannont send dump request");
+ return 1;
+ }
+
+ if (rtnl_dump_filter(&rth, print_af_stats, &ctx) < 0) {
+ fprintf(stderr, "Dump terminated\n");
+ return 1;
+ }
+
+ delete_json_obj();
+ return 0;
+}
+
+static int iplink_prop_mod(int argc, char **argv, struct iplink_req *req)
+{
+ struct rtattr *proplist;
+ char *dev = NULL;
+ char *name;
+
+ proplist = addattr_nest(&req->n, sizeof(*req),
+ IFLA_PROP_LIST | NLA_F_NESTED);
+
+ while (argc > 0) {
+ if (matches(*argv, "altname") == 0) {
+ NEXT_ARG();
+ if (check_altifname(*argv))
+ invarg("not a valid altname", *argv);
+ name = *argv;
+ addattr_l(&req->n, sizeof(*req), IFLA_ALT_IFNAME,
+ name, strlen(name) + 1);
+ } else if (matches(*argv, "help") == 0) {
+ usage();
+ } else {
+ if (strcmp(*argv, "dev") == 0)
+ NEXT_ARG();
+ if (dev)
+ duparg2("dev", *argv);
+ if (check_altifname(*argv))
+ invarg("\"dev\" not a valid ifname", *argv);
+ dev = *argv;
+ }
+ argv++; argc--;
+ }
+ addattr_nest_end(&req->n, proplist);
+
+ if (!dev) {
+ fprintf(stderr, "Not enough of information: \"dev\" argument is required.\n");
+ exit(-1);
+ }
+
+ req->i.ifi_index = ll_name_to_index(dev);
+ if (!req->i.ifi_index)
+ return nodev(dev);
+
+ if (rtnl_talk(&rth, &req->n, NULL) < 0)
+ return -2;
+
+ return 0;
+}
+
+static int iplink_prop(int argc, char **argv)
+{
+ struct iplink_req req = {
+ .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
+ .n.nlmsg_flags = NLM_F_REQUEST,
+ .i.ifi_family = preferred_family,
+ };
+
+ if (argc <= 0) {
+ usage();
+ exit(-1);
+ }
+
+ if (matches(*argv, "add") == 0) {
+ req.n.nlmsg_flags |= NLM_F_EXCL | NLM_F_CREATE | NLM_F_APPEND;
+ req.n.nlmsg_type = RTM_NEWLINKPROP;
+ } else if (matches(*argv, "del") == 0) {
+ req.n.nlmsg_type = RTM_DELLINKPROP;
+ } else if (matches(*argv, "help") == 0) {
+ usage();
+ } else {
+ fprintf(stderr, "Operator required\n");
+ exit(-1);
+ }
+ return iplink_prop_mod(argc - 1, argv + 1, &req);
+}
+
+static void do_help(int argc, char **argv)
+{
+ struct link_util *lu = NULL;
+
+ if (argc <= 0) {
+ usage();
+ return;
+ }
+
+ lu = get_link_kind(*argv);
+ if (lu && lu->print_help)
+ lu->print_help(lu, argc-1, argv+1, stdout);
+ else
+ usage();
+}
+
+int do_iplink(int argc, char **argv)
+{
+ if (argc < 1)
+ return ipaddr_list_link(0, NULL);
+
+ 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, "xstats") == 0)
+ return iplink_ifla_xstats(argc-1, argv+1);
+
+ if (matches(*argv, "afstats") == 0) {
+ iplink_afstats(argc-1, argv+1);
+ return 0;
+ }
+
+ if (matches(*argv, "property") == 0)
+ return iplink_prop(argc-1, argv+1);
+
+ if (matches(*argv, "help") == 0) {
+ do_help(argc-1, argv+1);
+ return 0;
+ }
+
+ fprintf(stderr, "Command \"%s\" is unknown, try \"ip link help\".\n",
+ *argv);
+ exit(-1);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-13 02:01:18 +0000