/* vi: set sw=4 ts=4: */ /* * Authors: Alexey Kuznetsov, * Patrick McHardy * * Licensed under GPLv2 or later, see file LICENSE in this source tree. */ #include /*#include - not needed? */ #include #include #include #if ENABLE_FEATURE_IP_LINK_CAN # include #endif #include "ip_common.h" /* #include "libbb.h" is inside */ #include "rt_names.h" #include "utils.h" #undef ETH_P_8021AD #define ETH_P_8021AD 0x88A8 #undef VLAN_FLAG_REORDER_HDR #define VLAN_FLAG_REORDER_HDR 0x1 #undef VLAN_FLAG_GVRP #define VLAN_FLAG_GVRP 0x2 #undef VLAN_FLAG_LOOSE_BINDING #define VLAN_FLAG_LOOSE_BINDING 0x4 #undef VLAN_FLAG_MVRP #define VLAN_FLAG_MVRP 0x8 #undef IFLA_VLAN_PROTOCOL #define IFLA_VLAN_PROTOCOL 5 #ifndef NLMSG_TAIL #define NLMSG_TAIL(nmsg) \ ((struct rtattr *) (((void *) (nmsg)) + NLMSG_ALIGN((nmsg)->nlmsg_len))) #endif #ifndef IFLA_LINKINFO # define IFLA_LINKINFO 18 # define IFLA_INFO_KIND 1 # define IFLA_INFO_DATA 2 #endif #ifndef IFLA_VLAN_MAX # define IFLA_VLAN_ID 1 # define IFLA_VLAN_FLAGS 2 struct ifla_vlan_flags { uint32_t flags; uint32_t mask; }; #endif #if ENABLE_FEATURE_IP_LINK_CAN # ifndef CAN_CTRLMODE_ONE_SHOT # define CAN_CTRLMODE_ONE_SHOT 0x08 /* One-Shot mode */ # endif # ifndef CAN_CTRLMODE_BERR_REPORTING # define CAN_CTRLMODE_BERR_REPORTING 0x10 /* Bus-error reporting */ # endif # ifndef CAN_CTRLMODE_FD # define CAN_CTRLMODE_FD 0x20 /* CAN FD mode */ # endif # ifndef CAN_CTRLMODE_PRESUME_ACK # define CAN_CTRLMODE_PRESUME_ACK 0x40 /* Ignore missing CAN ACKs */ # endif # ifndef CAN_CTRLMODE_FD_NON_ISO # define CAN_CTRLMODE_FD_NON_ISO 0x80 /* CAN FD in non-ISO mode */ # endif # ifndef IFLA_CAN_TERMINATION # define IFLA_CAN_TERMINATION 11 # endif #endif /* taken from linux/sockios.h */ #define SIOCSIFNAME 0x8923 /* set interface name */ #if 0 # define dbg(...) bb_error_msg(__VA_ARGS__) #else # define dbg(...) ((void)0) #endif #define str_on_off "on\0""off\0" enum { PARM_on = 0, PARM_off }; /* Exits on error */ static int get_ctl_fd(void) { int fd; fd = socket(PF_INET, SOCK_DGRAM, 0); if (fd >= 0) return fd; fd = socket(PF_PACKET, SOCK_DGRAM, 0); if (fd >= 0) return fd; return xsocket(PF_INET6, SOCK_DGRAM, 0); } /* Exits on error */ static void do_chflags(char *dev, uint32_t flags, uint32_t mask) { struct ifreq ifr; int fd; strncpy_IFNAMSIZ(ifr.ifr_name, dev); fd = get_ctl_fd(); xioctl(fd, SIOCGIFFLAGS, &ifr); if ((ifr.ifr_flags ^ flags) & mask) { ifr.ifr_flags &= ~mask; ifr.ifr_flags |= mask & flags; xioctl(fd, SIOCSIFFLAGS, &ifr); } close(fd); } /* Exits on error */ static void do_changename(char *dev, char *newdev) { struct ifreq ifr; int fd; strncpy_IFNAMSIZ(ifr.ifr_name, dev); strncpy_IFNAMSIZ(ifr.ifr_newname, newdev); fd = get_ctl_fd(); xioctl(fd, SIOCSIFNAME, &ifr); close(fd); } /* Exits on error */ static void set_qlen(char *dev, int qlen) { struct ifreq ifr; int s; s = get_ctl_fd(); memset(&ifr, 0, sizeof(ifr)); strncpy_IFNAMSIZ(ifr.ifr_name, dev); ifr.ifr_qlen = qlen; xioctl(s, SIOCSIFTXQLEN, &ifr); close(s); } /* Exits on error */ static void set_mtu(char *dev, int mtu) { struct ifreq ifr; int s; s = get_ctl_fd(); memset(&ifr, 0, sizeof(ifr)); strncpy_IFNAMSIZ(ifr.ifr_name, dev); ifr.ifr_mtu = mtu; xioctl(s, SIOCSIFMTU, &ifr); close(s); } /* Exits on error */ static void set_master(char *dev, int master) { struct rtnl_handle rth; struct { struct nlmsghdr n; struct ifinfomsg i; char buf[1024]; } req; 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_NEWLINK; req.i.ifi_family = preferred_family; xrtnl_open(&rth); req.i.ifi_index = xll_name_to_index(dev); //printf("master %i for %i\n", master, req.i.ifi_index); addattr_l(&req.n, sizeof(req), IFLA_MASTER, &master, 4); if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0) xfunc_die(); } /* Exits on error */ static void set_netns(char *dev, int netns) { struct rtnl_handle rth; struct { struct nlmsghdr n; struct ifinfomsg i; char buf[1024]; } req; 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_NEWLINK; req.i.ifi_family = preferred_family; xrtnl_open(&rth); req.i.ifi_index = xll_name_to_index(dev); //printf("netns %i for %i\n", netns, req.i.ifi_index); addattr_l(&req.n, sizeof(req), IFLA_NET_NS_PID, &netns, 4); if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0) xfunc_die(); } /* Exits on error */ static int get_address(char *dev, int *htype) { struct ifreq ifr; struct sockaddr_ll me; int s; s = xsocket(PF_PACKET, SOCK_DGRAM, 0); /*memset(&ifr, 0, sizeof(ifr)); - SIOCGIFINDEX does not need to clear all */ strncpy_IFNAMSIZ(ifr.ifr_name, dev); xioctl(s, SIOCGIFINDEX, &ifr); memset(&me, 0, sizeof(me)); me.sll_family = AF_PACKET; me.sll_ifindex = ifr.ifr_ifindex; me.sll_protocol = htons(ETH_P_LOOP); xbind(s, (struct sockaddr*)&me, sizeof(me)); bb_getsockname(s, (struct sockaddr*)&me, sizeof(me)); //never happens: //if (getsockname(s, (struct sockaddr*)&me, &alen) == -1) // bb_perror_msg_and_die("getsockname"); close(s); *htype = me.sll_hatype; return me.sll_halen; } /* Exits on error */ static void parse_address(char *dev, int hatype, int halen, char *lla, struct ifreq *ifr) { int alen; memset(ifr, 0, sizeof(*ifr)); strncpy_IFNAMSIZ(ifr->ifr_name, dev); ifr->ifr_hwaddr.sa_family = hatype; alen = hatype == 1/*ARPHRD_ETHER*/ ? 14/*ETH_HLEN*/ : 19/*INFINIBAND_HLEN*/; alen = ll_addr_a2n((unsigned char *)(ifr->ifr_hwaddr.sa_data), alen, lla); if (alen < 0) exit_FAILURE(); if (alen != halen) { bb_error_msg_and_die("wrong address (%s) length: expected %d bytes", lla, halen); } } /* Exits on error */ static void set_address(struct ifreq *ifr, int brd) { int s; s = get_ctl_fd(); if (brd) xioctl(s, SIOCSIFHWBROADCAST, ifr); else xioctl(s, SIOCSIFHWADDR, ifr); close(s); } static void die_must_be_on_off(const char *msg) NORETURN; static void die_must_be_on_off(const char *msg) { bb_error_msg_and_die("argument of \"%s\" must be \"on\" or \"off\"", msg); } #if ENABLE_FEATURE_IP_LINK_CAN static uint32_t get_float_1000(char *arg, const char *errmsg) { uint32_t ret; double d; char *ptr; errno = 0; //TODO: needs setlocale(LC_NUMERIC, "C")? d = strtod(arg, &ptr); if (errno || ptr == arg || *ptr || d > (0xFFFFFFFFU / 1000) || d < 0 ) { invarg_1_to_2(arg, errmsg); /* does not return */ } ret = d * 1000; return ret; } static void do_set_can(char *dev, char **argv) { struct can_bittiming bt = {}, dbt = {}; struct can_ctrlmode cm = {}; char *keyword; static const char keywords[] ALIGN1 = "bitrate\0""sample-point\0""tq\0" "prop-seg\0""phase-seg1\0""phase-seg2\0""sjw\0" "dbitrate\0""dsample-point\0""dtq\0" "dprop-seg\0""dphase-seg1\0""dphase-seg2\0""dsjw\0" "loopback\0""listen-only\0""triple-sampling\0" "one-shot\0""berr-reporting\0" "fd\0""fd-non-iso\0""presume-ack\0" "cc-len8-dlc\0""restart\0""restart-ms\0" "termination\0"; enum { ARG_bitrate = 0, ARG_sample_point, ARG_tq, ARG_prop_seg, ARG_phase_seg1, ARG_phase_seg2, ARG_sjw, ARG_dbitrate, ARG_dsample_point, ARG_dtq, ARG_dprop_seg, ARG_dphase_seg1, ARG_dphase_seg2, ARG_dsjw, ARG_loopback, ARG_listen_only, ARG_triple_sampling, ARG_one_shot, ARG_berr_reporting, ARG_fd, ARG_fd_non_iso, ARG_presume_ack, ARG_cc_len8_dlc, ARG_restart, ARG_restart_ms, ARG_termination }; struct rtnl_handle rth; struct { struct nlmsghdr n; struct ifinfomsg i; char buf[1024]; } req; size_t dev_len; struct rtattr *linkinfo, *data; smalluint key, param; 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_NEWLINK; req.i.ifi_family = preferred_family; xrtnl_open(&rth); req.i.ifi_index = xll_name_to_index(dev); dev_len = strlen(dev); if (dev_len < 2 || dev_len > IFNAMSIZ) invarg_1_to_2(dev, "dev"); addattr_l(&req.n, sizeof(req), IFLA_IFNAME, dev, dev_len); linkinfo = NLMSG_TAIL(&req.n); addattr_l(&req.n, sizeof(req), IFLA_LINKINFO, NULL, 0); addattr_l(&req.n, sizeof(req), IFLA_INFO_KIND, (void *)"can", strlen("can")); data = NLMSG_TAIL(&req.n); addattr_l(&req.n, sizeof(req), IFLA_INFO_DATA, NULL, 0); while (*argv) { key = index_in_substrings(keywords, *argv); keyword = *argv; //printf("%s: key: %d, *argv: %s\n", __func__, key, *argv); switch (key) { case ARG_bitrate: case ARG_tq: case ARG_prop_seg: case ARG_phase_seg1: case ARG_phase_seg2: case ARG_sjw: { uint32_t *val; NEXT_ARG(); if (key == ARG_bitrate) val = &bt.bitrate; else if (key == ARG_tq) val = &bt.tq; else if (key == ARG_prop_seg) val = &bt.prop_seg; else if (key == ARG_phase_seg1) val = &bt.phase_seg1; else if (key == ARG_phase_seg2) val = &bt.phase_seg2; else val = &bt.sjw; *val = get_u32(*argv, keyword); break; } case ARG_sample_point: { NEXT_ARG(); bt.sample_point = get_float_1000(*argv, keyword); break; } case ARG_dbitrate: case ARG_dtq: case ARG_dprop_seg: case ARG_dphase_seg1: case ARG_dphase_seg2: case ARG_dsjw: { uint32_t *val; NEXT_ARG(); if (key == ARG_dbitrate) val = &dbt.bitrate; else if (key == ARG_dtq) val = &dbt.tq; else if (key == ARG_dprop_seg) val = &dbt.prop_seg; else if (key == ARG_dphase_seg1) val = &dbt.phase_seg1; else if (key == ARG_dphase_seg2) val = &dbt.phase_seg2; else val = &dbt.sjw; *val = get_u32(*argv, keyword); break; } case ARG_dsample_point: { NEXT_ARG(); dbt.sample_point = get_float_1000(*argv, keyword); break; } case ARG_loopback: case ARG_listen_only: case ARG_triple_sampling: case ARG_one_shot: case ARG_berr_reporting: case ARG_fd: case ARG_fd_non_iso: case ARG_presume_ack: case ARG_cc_len8_dlc: { uint32_t flag = 0; NEXT_ARG(); param = index_in_strings(str_on_off, *argv); if (param < 0) die_must_be_on_off(keyword); if (key == ARG_loopback) flag = CAN_CTRLMODE_LOOPBACK; else if (key == ARG_listen_only) flag = CAN_CTRLMODE_LISTENONLY; else if (key == ARG_triple_sampling) flag = CAN_CTRLMODE_3_SAMPLES; else if (key == ARG_one_shot) flag = CAN_CTRLMODE_ONE_SHOT; else if (key == ARG_berr_reporting) flag = CAN_CTRLMODE_BERR_REPORTING; else if (key == ARG_fd) flag = CAN_CTRLMODE_FD; else if (key == ARG_fd_non_iso) flag = CAN_CTRLMODE_FD_NON_ISO; else if (key == ARG_presume_ack) flag = CAN_CTRLMODE_PRESUME_ACK; else #if defined(CAN_CTRLMODE_CC_LEN8_DLC) flag = CAN_CTRLMODE_CC_LEN8_DLC; #else die_must_be_on_off(keyword); #endif cm.mask |= flag; if (param == PARM_on) cm.flags |= flag; break; } case ARG_restart: { uint32_t val = 1; /*NEXT_ARG(); - WRONG? */ addattr_l(&req.n, sizeof(req), IFLA_CAN_RESTART, &val, sizeof(val)); break; } case ARG_restart_ms: { uint32_t val; NEXT_ARG(); val = get_u32(*argv, keyword); addattr_l(&req.n, sizeof(req), IFLA_CAN_RESTART_MS, &val, sizeof(val)); break; } case ARG_termination: { uint16_t val; NEXT_ARG(); val = get_u16(*argv, keyword); addattr_l(&req.n, sizeof(req), IFLA_CAN_TERMINATION, &val, sizeof(val)); break; } default: break; } argv++; } if (bt.bitrate || bt.tq) addattr_l(&req.n, sizeof(req), IFLA_CAN_BITTIMING, &bt, sizeof(bt)); if (cm.mask) addattr_l(&req.n, sizeof(req), IFLA_CAN_CTRLMODE, &cm, sizeof(cm)); data->rta_len = (void *)NLMSG_TAIL(&req.n) - (void *)data; linkinfo->rta_len = (void *)NLMSG_TAIL(&req.n) - (void *)linkinfo; if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0) xfunc_die(); } static void set_type(char *type, char *dev, char **argv) { /* When we have more than just "type can ARGS" supported, maybe: static const char keywords[] ALIGN1 = "" IF_FEATURE_IP_LINK_CAN("can\0") ; typedef void FAST_FUNC(*ip_type_set_func_ptr_t)(char*, char**); static const ip_type_set_func_ptr_t funcs[] ALIGN_PTR = { IF_FEATURE_IP_LINK_CAN(do_set_can,) }; ip_type_set_func_ptr_t func; int key; key = index_in_substrings(keywords, type); if (key < 0) invarg_1_to_2(type, "type"); func = funcs[key]; func(dev, argv); */ if (strcmp(type, "can") != 0) invarg_1_to_2(type, "type"); do_set_can(dev, argv); } #endif /* Return value becomes exitcode. It's okay to not return at all */ static int do_set(char **argv) { char *dev = NULL; #if ENABLE_FEATURE_IP_LINK_CAN char *type = NULL; #endif uint32_t mask = 0; uint32_t flags = 0; int qlen = -1; int mtu = -1; int master = -1; int netns = -1; char *newaddr = NULL; char *newbrd = NULL; struct ifreq ifr0, ifr1; char *newname = NULL; int htype, halen; /* If you add stuff here, update iplink_full_usage */ static const char keywords[] ALIGN1 = "up\0""down\0""name\0""mtu\0""qlen\0""multicast\0" "arp\0""promisc\0""address\0""netns\0" "master\0""nomaster\0" #if ENABLE_FEATURE_IP_LINK_CAN "type\0" #endif "dev\0" /* must be last */; enum { ARG_up = 0, ARG_down, ARG_name, ARG_mtu, ARG_qlen, ARG_multicast, ARG_arp, ARG_promisc, ARG_addr, ARG_netns, ARG_master, ARG_nomaster, #if ENABLE_FEATURE_IP_LINK_CAN ARG_type, #endif ARG_dev }; smalluint key; while (*argv) { /* substring search ensures that e.g. "addr" and "address" * are both accepted */ key = index_in_substrings(keywords, *argv); //printf("%s: key: %d, *argv: %s\n", __func__, key, *argv); if (key == ARG_up) { mask |= IFF_UP; flags |= IFF_UP; } else if (key == ARG_down) { mask |= IFF_UP; flags &= ~IFF_UP; } else if (key == ARG_name) { NEXT_ARG(); newname = *argv; } else if (key == ARG_mtu) { NEXT_ARG(); if (mtu != -1) duparg("mtu", *argv); mtu = get_unsigned(*argv, "mtu"); } else if (key == ARG_qlen) { //TODO: txqueuelen, txqlen are synonyms to qlen NEXT_ARG(); if (qlen != -1) duparg("qlen", *argv); qlen = get_unsigned(*argv, "qlen"); } else if (key == ARG_addr) { NEXT_ARG(); newaddr = *argv; } else if (key == ARG_master) { NEXT_ARG(); master = xll_name_to_index(*argv); } else if (key == ARG_nomaster) { master = 0; } else if (key == ARG_netns) { NEXT_ARG(); netns = get_unsigned(*argv, "netns"); #if ENABLE_FEATURE_IP_LINK_CAN } else if (key == ARG_type) { NEXT_ARG(); type = *argv; argv++; break; #endif } else if (key >= ARG_dev) { /* ^^^^^^ ">=" here results in "dev IFACE" treated as default */ if (key == ARG_dev) { NEXT_ARG(); } if (dev) duparg2("dev", *argv); dev = *argv; } else { /* "on|off" options */ int param; NEXT_ARG(); param = index_in_strings(str_on_off, *argv); if (key == ARG_multicast) { if (param < 0) die_must_be_on_off("multicast"); mask |= IFF_MULTICAST; if (param == PARM_on) flags |= IFF_MULTICAST; else flags &= ~IFF_MULTICAST; } else if (key == ARG_arp) { if (param < 0) die_must_be_on_off("arp"); mask |= IFF_NOARP; if (param == PARM_on) flags &= ~IFF_NOARP; else flags |= IFF_NOARP; } else if (key == ARG_promisc) { if (param < 0) die_must_be_on_off("promisc"); mask |= IFF_PROMISC; if (param == PARM_on) flags |= IFF_PROMISC; else flags &= ~IFF_PROMISC; } } /* Other keywords recognized by iproute2-3.12.0: */ #if 0 } 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 (strcmp(*argv, "netns") == 0) { NEXT_ARG(); if (netns != -1) duparg("netns", *argv); if ((netns = get_netns_fd(*argv)) >= 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_1_to_2(*argv, "netns"); } 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, "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, "vf") == 0) { struct rtattr *vflist; NEXT_ARG(); if (get_integer(&vf, *argv, 0)) { invarg_1_to_2(*argv, "vf"); } 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); } else if (matches(*argv, "master") == 0) { int ifindex; NEXT_ARG(); ifindex = ll_name_to_index(*argv); if (!ifindex) invarg_1_to_2(*argv, "master"); addattr_l(&req->n, sizeof(*req), IFLA_MASTER, &ifindex, 4); } 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, "alias") == 0) { NEXT_ARG(); addattr_l(&req->n, sizeof(*req), IFLA_IFALIAS, *argv, strlen(*argv)); argc--; argv++; break; } else if (strcmp(*argv, "group") == 0) { NEXT_ARG(); if (*group != -1) duparg("group", *argv); if (rtnl_group_a2n(group, *argv)) invarg_1_to_2(*argv, "group"); } else if (strcmp(*argv, "mode") == 0) { int mode; NEXT_ARG(); mode = get_link_mode(*argv); if (mode < 0) invarg_1_to_2(*argv, "mode"); 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_1_to_2(*argv, "state"); 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_1_to_2(*argv, "numtxqueues"); 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_1_to_2(*argv, "numrxqueues"); addattr_l(&req->n, sizeof(*req), IFLA_NUM_RX_QUEUES, &numrxqueues, 4); } #endif argv++; } if (!dev) { bb_error_msg_and_die(bb_msg_requires_arg, "\"dev\""); } if (newaddr || newbrd) { halen = get_address(dev, &htype); if (newaddr) { parse_address(dev, htype, halen, newaddr, &ifr0); set_address(&ifr0, 0); } if (newbrd) { parse_address(dev, htype, halen, newbrd, &ifr1); set_address(&ifr1, 1); } } if (newname && strcmp(dev, newname)) { do_changename(dev, newname); dev = newname; } if (qlen != -1) { set_qlen(dev, qlen); } if (mtu != -1) { set_mtu(dev, mtu); } if (master != -1) { set_master(dev, master); } if (netns != -1) { set_netns(dev, netns); } if (mask) do_chflags(dev, flags, mask); #if ENABLE_FEATURE_IP_LINK_CAN if (type) set_type(type, dev, argv); #endif return 0; } static int ipaddr_list_link(char **argv) { preferred_family = AF_PACKET; return ipaddr_list_or_flush(argv, 0); } static void vlan_parse_opt(char **argv, struct nlmsghdr *n, unsigned int size) { static const char keywords[] ALIGN1 = "id\0" "protocol\0" "reorder_hdr\0" "gvrp\0" "mvrp\0" "loose_binding\0" ; static const char protocols[] ALIGN1 = "802.1q\0" "802.1ad\0" ; enum { ARG_id = 0, ARG_protocol, ARG_reorder_hdr, ARG_gvrp, ARG_mvrp, ARG_loose_binding, }; enum { PROTO_8021Q = 0, PROTO_8021AD, }; int arg; uint16_t id, proto; struct ifla_vlan_flags flags = {}; while (*argv) { arg = index_in_substrings(keywords, *argv); if (arg < 0) invarg_1_to_2(*argv, "type vlan"); NEXT_ARG(); if (arg == ARG_id) { id = get_u16(*argv, "id"); addattr_l(n, size, IFLA_VLAN_ID, &id, sizeof(id)); } else if (arg == ARG_protocol) { arg = index_in_substrings(protocols, str_tolower(*argv)); if (arg == PROTO_8021Q) proto = htons(ETH_P_8021Q); else if (arg == PROTO_8021AD) proto = htons(ETH_P_8021AD); else bb_error_msg_and_die("unknown VLAN encapsulation protocol '%s'", *argv); addattr_l(n, size, IFLA_VLAN_PROTOCOL, &proto, sizeof(proto)); } else { int param = index_in_strings(str_on_off, *argv); if (param < 0) die_must_be_on_off(nth_string(keywords, arg)); if (arg == ARG_reorder_hdr) { flags.mask |= VLAN_FLAG_REORDER_HDR; flags.flags &= ~VLAN_FLAG_REORDER_HDR; if (param == PARM_on) flags.flags |= VLAN_FLAG_REORDER_HDR; } else if (arg == ARG_gvrp) { flags.mask |= VLAN_FLAG_GVRP; flags.flags &= ~VLAN_FLAG_GVRP; if (param == PARM_on) flags.flags |= VLAN_FLAG_GVRP; } else if (arg == ARG_mvrp) { flags.mask |= VLAN_FLAG_MVRP; flags.flags &= ~VLAN_FLAG_MVRP; if (param == PARM_on) flags.flags |= VLAN_FLAG_MVRP; } else { /*if (arg == ARG_loose_binding) */ flags.mask |= VLAN_FLAG_LOOSE_BINDING; flags.flags &= ~VLAN_FLAG_LOOSE_BINDING; if (param == PARM_on) flags.flags |= VLAN_FLAG_LOOSE_BINDING; } } argv++; } if (flags.mask) addattr_l(n, size, IFLA_VLAN_FLAGS, &flags, sizeof(flags)); } static void vrf_parse_opt(char **argv, struct nlmsghdr *n, unsigned int size) { /* IFLA_VRF_TABLE is an enum, not a define - * can't test "defined(IFLA_VRF_TABLE)". */ #if !defined(IFLA_VRF_MAX) # define IFLA_VRF_TABLE 1 #endif uint32_t table; if (strcmp(*argv, "table") != 0) invarg_1_to_2(*argv, "type vrf"); NEXT_ARG(); table = get_u32(*argv, "table"); addattr_l(n, size, IFLA_VRF_TABLE, &table, sizeof(table)); } /* Return value becomes exitcode. It's okay to not return at all */ static int do_add_or_delete(char **argv, const unsigned rtm) { static const char keywords[] ALIGN1 = "link\0""name\0""type\0""dev\0""address\0"; enum { ARG_link, ARG_name, ARG_type, ARG_dev, ARG_address, }; struct rtnl_handle rth; struct { struct nlmsghdr n; struct ifinfomsg i; char buf[1024]; } req; smalluint arg; char *name_str = NULL; char *link_str = NULL; char *type_str = NULL; char *dev_str = NULL; char *address_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; /* NB: update iplink_full_usage if you extend this code */ while (*argv) { arg = index_in_substrings(keywords, *argv); if (arg == ARG_type) { NEXT_ARG(); type_str = *argv++; dbg("type_str:'%s'", type_str); break; } if (arg == ARG_link) { NEXT_ARG(); link_str = *argv; dbg("link_str:'%s'", link_str); } else if (arg == ARG_name) { NEXT_ARG(); name_str = *argv; dbg("name_str:'%s'", name_str); } else if (arg == ARG_address) { NEXT_ARG(); address_str = *argv; dbg("address_str:'%s'", address_str); } else { if (arg == ARG_dev) { if (dev_str) duparg(*argv, "dev"); NEXT_ARG(); } dev_str = *argv; dbg("dev_str:'%s'", dev_str); } 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)); if (*argv) { struct rtattr *data = NLMSG_TAIL(&req.n); addattr_l(&req.n, sizeof(req), IFLA_INFO_DATA, NULL, 0); if (strcmp(type_str, "vlan") == 0) vlan_parse_opt(argv, &req.n, sizeof(req)); else if (strcmp(type_str, "vrf") == 0) vrf_parse_opt(argv, &req.n, sizeof(req)); data->rta_len = (void *)NLMSG_TAIL(&req.n) - (void *)data; } linkinfo->rta_len = (void *)NLMSG_TAIL(&req.n) - (void *)linkinfo; } /* Allow "ip link add dev" and "ip link add name" */ if (!name_str) name_str = dev_str; else if (!dev_str) dev_str = name_str; /* else if (!strcmp(name_str, dev_str)) name_str = dev_str; */ 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 (link_str) { int idx = xll_name_to_index(link_str); addattr_l(&req.n, sizeof(req), IFLA_LINK, &idx, 4); } if (address_str) { unsigned char abuf[32]; int len = ll_addr_a2n(abuf, sizeof(abuf), address_str); dbg("address len:%d", len); if (len < 0) return -1; addattr_l(&req.n, sizeof(req), IFLA_ADDRESS, abuf, len); } } if (name_str) { const size_t name_len = strlen(name_str) + 1; if (name_len < 2 || name_len > IFNAMSIZ) invarg_1_to_2(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 FAST_FUNC do_iplink(char **argv) { static const char keywords[] ALIGN1 = "add\0""delete\0""set\0""show\0""lst\0""list\0"; xfunc_error_retval = 2; //TODO: move up to "ip"? Is it the common rule for all "ip" tools? if (*argv) { int key = index_in_substrings(keywords, *argv); if (key < 0) /* invalid argument */ invarg_1_to_2(*argv, applet_name); argv++; if (key <= 1) /* add/delete */ return do_add_or_delete(argv, key ? RTM_DELLINK : RTM_NEWLINK); if (key == 2) /* set */ return do_set(argv); } /* show, lst, list */ return ipaddr_list_link(argv); }