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JustOS/busybox-1_37_0/networking/libiproute/iplink.c

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/* vi: set sw=4 ts=4: */
/*
* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
* Patrick McHardy <kaber@trash.net>
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
#include <net/if.h>
/*#include <net/if_packet.h> - not needed? */
#include <netpacket/packet.h>
#include <netinet/if_ether.h>
#include <linux/if_vlan.h>
#if ENABLE_FEATURE_IP_LINK_CAN
# include <linux/can/netlink.h>
#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
/* 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);
}
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