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freebsd-src/sbin/ifconfig/ifconfig.c
Gordon Tetlow a68e4f7a06
Migrate from printb to print_bits for locally defined bit fields. 
Reviewed by:	emaste
Event:		Kitchener-Waterloo Hackathon 202406
Differential Revision:	https://reviews.freebsd.org/D45441
2024-06-03 11:48:35 -04:00

2176 lines
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/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 1983, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/param.h>
#include <sys/ioctl.h>
#ifdef JAIL
#include <sys/jail.h>
#endif
#include <sys/module.h>
#include <sys/linker.h>
#include <sys/nv.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_strings.h>
#include <net/if_types.h>
#include <net/route.h>
/* IP */
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <fnmatch.h>
#include <ifaddrs.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#ifdef JAIL
#include <jail.h>
#endif
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <libifconfig.h>
#include "ifconfig.h"
ifconfig_handle_t *lifh;
#ifdef WITHOUT_NETLINK
static char *descr = NULL;
static size_t descrlen = 64;
#endif
static int setaddr;
static int setmask;
static int doalias;
static int clearaddr;
static int newaddr = 1;
int exit_code = 0;
static char ifname_to_print[IFNAMSIZ]; /* Helper for printifnamemaybe() */
/* Formatter Strings */
char *f_inet, *f_inet6, *f_ether, *f_addr;
#ifdef WITHOUT_NETLINK
static void list_interfaces_ioctl(if_ctx *ctx);
static void status(if_ctx *ctx, const struct sockaddr_dl *sdl,
struct ifaddrs *ifa);
#endif
static _Noreturn void usage(void);
static void Perrorc(const char *cmd, int error);
static int getifflags(const char *ifname, int us, bool err_ok);
static struct afswtch *af_getbyname(const char *name);
static struct option *opts = NULL;
struct ifa_order_elt {
int if_order;
int af_orders[255];
struct ifaddrs *ifa;
TAILQ_ENTRY(ifa_order_elt) link;
};
TAILQ_HEAD(ifa_queue, ifa_order_elt);
static struct module_map_entry {
const char *ifname;
const char *kldname;
} module_map[] = {
{
.ifname = "tun",
.kldname = "if_tuntap",
},
{
.ifname = "tap",
.kldname = "if_tuntap",
},
{
.ifname = "vmnet",
.kldname = "if_tuntap",
},
{
.ifname = "ipsec",
.kldname = "ipsec",
},
{
/*
* This mapping exists because there is a conflicting enc module
* in CAM. ifconfig's guessing behavior will attempt to match
* the ifname to a module as well as if_${ifname} and clash with
* CAM enc. This is an assertion of the correct module to load.
*/
.ifname = "enc",
.kldname = "if_enc",
},
};
void
opt_register(struct option *p)
{
p->next = opts;
opts = p;
}
static void
usage(void)
{
char options[1024];
struct option *p;
/* XXX not right but close enough for now */
options[0] = '\0';
for (p = opts; p != NULL; p = p->next) {
strlcat(options, p->opt_usage, sizeof(options));
strlcat(options, " ", sizeof(options));
}
fprintf(stderr,
"usage: ifconfig [-j jail] [-f type:format] %sinterface address_family\n"
" [address [dest_address]] [parameters]\n"
" ifconfig [-j jail] interface create\n"
" ifconfig [-j jail] -a %s[-d] [-m] [-u] [-v] [address_family]\n"
" ifconfig [-j jail] -l [-d] [-u] [address_family]\n"
" ifconfig [-j jail] %s[-d] [-m] [-u] [-v]\n",
options, options, options);
exit(1);
}
static void
ifname_update(if_ctx *ctx, const char *name)
{
strlcpy(ctx->_ifname_storage_ioctl, name, sizeof(ctx->_ifname_storage_ioctl));
ctx->ifname = ctx->_ifname_storage_ioctl;
strlcpy(ifname_to_print, name, sizeof(ifname_to_print));
}
static void
ifr_set_name(struct ifreq *ifr, const char *name)
{
strlcpy(ifr->ifr_name, name, sizeof(ifr->ifr_name));
}
int
ioctl_ctx_ifr(if_ctx *ctx, unsigned long cmd, struct ifreq *ifr)
{
ifr_set_name(ifr, ctx->ifname);
return (ioctl_ctx(ctx, cmd, ifr));
}
void
ifcreate_ioctl(if_ctx *ctx, struct ifreq *ifr)
{
char ifname_orig[IFNAMSIZ];
strlcpy(ifname_orig, ifr->ifr_name, sizeof(ifname_orig));
if (ioctl(ctx->io_s, SIOCIFCREATE2, ifr) < 0) {
switch (errno) {
case EEXIST:
errx(1, "interface %s already exists", ifr->ifr_name);
default:
err(1, "SIOCIFCREATE2 (%s)", ifr->ifr_name);
}
}
if (strncmp(ifname_orig, ifr->ifr_name, sizeof(ifname_orig)) != 0)
ifname_update(ctx, ifr->ifr_name);
}
#ifdef WITHOUT_NETLINK
static int
calcorders(struct ifaddrs *ifa, struct ifa_queue *q)
{
struct ifaddrs *prev;
struct ifa_order_elt *cur;
unsigned int ord, af, ifa_ord;
prev = NULL;
cur = NULL;
ord = 0;
ifa_ord = 0;
while (ifa != NULL) {
if (prev == NULL ||
strcmp(ifa->ifa_name, prev->ifa_name) != 0) {
cur = calloc(1, sizeof(*cur));
if (cur == NULL)
return (-1);
TAILQ_INSERT_TAIL(q, cur, link);
cur->if_order = ifa_ord ++;
cur->ifa = ifa;
ord = 0;
}
if (ifa->ifa_addr) {
af = ifa->ifa_addr->sa_family;
if (af < nitems(cur->af_orders) &&
cur->af_orders[af] == 0)
cur->af_orders[af] = ++ord;
}
prev = ifa;
ifa = ifa->ifa_next;
}
return (0);
}
static int
cmpifaddrs(struct ifaddrs *a, struct ifaddrs *b, struct ifa_queue *q)
{
struct ifa_order_elt *cur, *e1, *e2;
unsigned int af1, af2;
int ret;
e1 = e2 = NULL;
ret = strcmp(a->ifa_name, b->ifa_name);
if (ret != 0) {
TAILQ_FOREACH(cur, q, link) {
if (e1 && e2)
break;
if (strcmp(cur->ifa->ifa_name, a->ifa_name) == 0)
e1 = cur;
else if (strcmp(cur->ifa->ifa_name, b->ifa_name) == 0)
e2 = cur;
}
if (!e1 || !e2)
return (0);
else
return (e1->if_order - e2->if_order);
} else if (a->ifa_addr != NULL && b->ifa_addr != NULL) {
TAILQ_FOREACH(cur, q, link) {
if (strcmp(cur->ifa->ifa_name, a->ifa_name) == 0) {
e1 = cur;
break;
}
}
if (!e1)
return (0);
af1 = a->ifa_addr->sa_family;
af2 = b->ifa_addr->sa_family;
if (af1 < nitems(e1->af_orders) && af2 < nitems(e1->af_orders))
return (e1->af_orders[af1] - e1->af_orders[af2]);
}
return (0);
}
#endif
static void freeformat(void)
{
free(f_inet);
free(f_inet6);
free(f_ether);
free(f_addr);
}
static void setformat(char *input)
{
char *formatstr, *category, *modifier;
formatstr = strdup(input);
while ((category = strsep(&formatstr, ",")) != NULL) {
modifier = strchr(category, ':');
if (modifier == NULL) {
if (strcmp(category, "default") == 0) {
freeformat();
} else if (strcmp(category, "cidr") == 0) {
free(f_inet);
f_inet = strdup(category);
free(f_inet6);
f_inet6 = strdup(category);
} else {
warnx("Skipping invalid format: %s\n",
category);
}
continue;
}
/* Split the string on the separator, then seek past it */
modifier[0] = '\0';
modifier++;
if (strcmp(category, "addr") == 0) {
free(f_addr);
f_addr = strdup(modifier);
} else if (strcmp(category, "ether") == 0) {
free(f_ether);
f_ether = strdup(modifier);
} else if (strcmp(category, "inet") == 0) {
free(f_inet);
f_inet = strdup(modifier);
} else if (strcmp(category, "inet6") == 0) {
free(f_inet6);
f_inet6 = strdup(modifier);
}
}
free(formatstr);
}
#ifdef WITHOUT_NETLINK
static struct ifaddrs *
sortifaddrs(struct ifaddrs *list,
int (*compare)(struct ifaddrs *, struct ifaddrs *, struct ifa_queue *),
struct ifa_queue *q)
{
struct ifaddrs *right, *temp, *last, *result, *next, *tail;
right = list;
temp = list;
last = list;
result = NULL;
next = NULL;
tail = NULL;
if (!list || !list->ifa_next)
return (list);
while (temp && temp->ifa_next) {
last = right;
right = right->ifa_next;
temp = temp->ifa_next->ifa_next;
}
last->ifa_next = NULL;
list = sortifaddrs(list, compare, q);
right = sortifaddrs(right, compare, q);
while (list || right) {
if (!right) {
next = list;
list = list->ifa_next;
} else if (!list) {
next = right;
right = right->ifa_next;
} else if (compare(list, right, q) <= 0) {
next = list;
list = list->ifa_next;
} else {
next = right;
right = right->ifa_next;
}
if (!result)
result = next;
else
tail->ifa_next = next;
tail = next;
}
return (result);
}
#endif
static void
printifnamemaybe(void)
{
if (ifname_to_print[0] != '\0')
printf("%s\n", ifname_to_print);
}
static void
list_interfaces(if_ctx *ctx)
{
#ifdef WITHOUT_NETLINK
list_interfaces_ioctl(ctx);
#else
list_interfaces_nl(ctx->args);
#endif
}
static char *
args_peek(struct ifconfig_args *args)
{
if (args->argc > 0)
return (args->argv[0]);
return (NULL);
}
static char *
args_pop(struct ifconfig_args *args)
{
if (args->argc == 0)
return (NULL);
char *arg = args->argv[0];
args->argc--;
args->argv++;
return (arg);
}
static void
args_parse(struct ifconfig_args *args, int argc, char *argv[])
{
char options[1024];
struct option *p;
int c;
/* Parse leading line options */
strlcpy(options, "G:adDf:j:klmnuv", sizeof(options));
for (p = opts; p != NULL; p = p->next)
strlcat(options, p->opt, sizeof(options));
while ((c = getopt(argc, argv, options)) != -1) {
switch (c) {
case 'a': /* scan all interfaces */
args->all = true;
break;
case 'd': /* restrict scan to "down" interfaces */
args->downonly = true;
break;
case 'D': /* Print driver name */
args->drivername = true;
break;
case 'f':
if (optarg == NULL)
usage();
setformat(optarg);
break;
case 'G':
if (optarg == NULL || args->all == 0)
usage();
args->nogroup = optarg;
break;
case 'j':
#ifdef JAIL
if (optarg == NULL)
usage();
args->jail_name = optarg;
#else
Perror("not built with jail support");
#endif
break;
case 'k':
args->printkeys = true;
break;
case 'l': /* scan interface names only */
args->namesonly = true;
break;
case 'm': /* show media choices in status */
args->supmedia = true;
break;
case 'n': /* suppress module loading */
args->noload = true;
break;
case 'u': /* restrict scan to "up" interfaces */
args->uponly = true;
break;
case 'v':
args->verbose++;
break;
case 'g':
if (args->all) {
if (optarg == NULL)
usage();
args->matchgroup = optarg;
break;
}
/* FALLTHROUGH */
default:
for (p = opts; p != NULL; p = p->next)
if (p->opt[0] == c) {
p->cb(optarg);
break;
}
if (p == NULL)
usage();
break;
}
}
argc -= optind;
argv += optind;
/* -l cannot be used with -a or -m */
if (args->namesonly && (args->all || args->supmedia))
usage();
/* nonsense.. */
if (args->uponly && args->downonly)
usage();
/* no arguments is equivalent to '-a' */
if (!args->namesonly && argc < 1)
args->all = 1;
/* -a and -l allow an address family arg to limit the output */
if (args->all || args->namesonly) {
if (argc > 1)
usage();
if (argc == 1) {
const struct afswtch *afp = af_getbyname(*argv);
if (afp == NULL) {
warnx("Address family '%s' unknown.", *argv);
usage();
}
if (afp->af_name != NULL)
argc--, argv++;
/* leave with afp non-zero */
args->afp = afp;
}
} else {
/* not listing, need an argument */
if (argc < 1)
usage();
}
args->argc = argc;
args->argv = argv;
}
static int
ifconfig(if_ctx *ctx, int iscreate, const struct afswtch *uafp)
{
#ifdef WITHOUT_NETLINK
return (ifconfig_ioctl(ctx, iscreate, uafp));
#else
return (ifconfig_nl(ctx, iscreate, uafp));
#endif
}
static bool
isargcreate(const char *arg)
{
if (arg == NULL)
return (false);
if (strcmp(arg, "create") == 0 || strcmp(arg, "plumb") == 0)
return (true);
return (false);
}
static bool
isnametoolong(const char *ifname)
{
return (strlen(ifname) >= IFNAMSIZ);
}
int
main(int ac, char *av[])
{
char *envformat;
int flags;
#ifdef JAIL
int jid;
#endif
struct ifconfig_args _args = {};
struct ifconfig_args *args = &_args;
struct ifconfig_context ctx = {
.args = args,
.io_s = -1,
};
lifh = ifconfig_open();
if (lifh == NULL)
err(EXIT_FAILURE, "ifconfig_open");
envformat = getenv("IFCONFIG_FORMAT");
if (envformat != NULL)
setformat(envformat);
/*
* Ensure we print interface name when expected to,
* even if we terminate early due to error.
*/
atexit(printifnamemaybe);
args_parse(args, ac, av);
#ifdef JAIL
if (args->jail_name) {
jid = jail_getid(args->jail_name);
if (jid == -1)
Perror("jail not found");
if (jail_attach(jid) != 0)
Perror("cannot attach to jail");
}
#endif
if (!args->all && !args->namesonly) {
/* not listing, need an argument */
args->ifname = args_pop(args);
ctx.ifname = args->ifname;
/* check and maybe load support for this interface */
ifmaybeload(args, args->ifname);
char *arg = args_peek(args);
if (if_nametoindex(args->ifname) == 0) {
/*
* NOTE: We must special-case the `create' command
* right here as we would otherwise fail when trying
* to find the interface.
*/
if (isargcreate(arg)) {
if (isnametoolong(args->ifname))
errx(1, "%s: cloning name too long",
args->ifname);
ifconfig(&ctx, 1, NULL);
exit(exit_code);
}
#ifdef JAIL
/*
* NOTE: We have to special-case the `-vnet' command
* right here as we would otherwise fail when trying
* to find the interface as it lives in another vnet.
*/
if (arg != NULL && (strcmp(arg, "-vnet") == 0)) {
if (isnametoolong(args->ifname))
errx(1, "%s: interface name too long",
args->ifname);
ifconfig(&ctx, 0, NULL);
exit(exit_code);
}
#endif
errx(1, "interface %s does not exist", args->ifname);
} else {
/*
* Do not allow use `create` command as hostname if
* address family is not specified.
*/
if (isargcreate(arg)) {
if (args->argc == 1)
errx(1, "interface %s already exists",
args->ifname);
args_pop(args);
}
}
}
/* Check for address family */
if (args->argc > 0) {
args->afp = af_getbyname(args_peek(args));
if (args->afp != NULL)
args_pop(args);
}
/*
* Check for a requested configuration action on a single interface,
* which doesn't require building, sorting, and searching the entire
* system address list
*/
if ((args->argc > 0) && (args->ifname != NULL)) {
if (isnametoolong(args->ifname))
warnx("%s: interface name too long, skipping", args->ifname);
else {
flags = getifflags(args->ifname, -1, false);
if (!(((flags & IFF_CANTCONFIG) != 0) ||
(args->downonly && (flags & IFF_UP) != 0) ||
(args->uponly && (flags & IFF_UP) == 0)))
ifconfig(&ctx, 0, args->afp);
}
goto done;
}
args->allfamilies = args->afp == NULL;
list_interfaces(&ctx);
done:
freeformat();
ifconfig_close(lifh);
exit(exit_code);
}
bool
match_ether(const struct sockaddr_dl *sdl)
{
switch (sdl->sdl_type) {
case IFT_ETHER:
case IFT_L2VLAN:
case IFT_BRIDGE:
if (sdl->sdl_alen == ETHER_ADDR_LEN)
return (true);
default:
return (false);
}
}
bool
match_if_flags(struct ifconfig_args *args, int if_flags)
{
if ((if_flags & IFF_CANTCONFIG) != 0)
return (false);
if (args->downonly && (if_flags & IFF_UP) != 0)
return (false);
if (args->uponly && (if_flags & IFF_UP) == 0)
return (false);
return (true);
}
#ifdef WITHOUT_NETLINK
static bool
match_afp(const struct afswtch *afp, int sa_family, const struct sockaddr_dl *sdl)
{
if (afp == NULL)
return (true);
/* special case for "ether" address family */
if (!strcmp(afp->af_name, "ether")) {
if (sdl == NULL || !match_ether(sdl))
return (false);
return (true);
}
return (afp->af_af == sa_family);
}
static void
list_interfaces_ioctl(if_ctx *ctx)
{
struct ifa_queue q = TAILQ_HEAD_INITIALIZER(q);
struct ifaddrs *ifap, *sifap, *ifa;
struct ifa_order_elt *cur, *tmp;
char *namecp = NULL;
int ifindex;
struct ifconfig_args *args = ctx->args;
if (getifaddrs(&ifap) != 0)
err(EXIT_FAILURE, "getifaddrs");
char *cp = NULL;
if (calcorders(ifap, &q) != 0)
err(EXIT_FAILURE, "calcorders");
sifap = sortifaddrs(ifap, cmpifaddrs, &q);
TAILQ_FOREACH_SAFE(cur, &q, link, tmp)
free(cur);
ifindex = 0;
for (ifa = sifap; ifa; ifa = ifa->ifa_next) {
struct ifreq paifr = {};
const struct sockaddr_dl *sdl;
strlcpy(paifr.ifr_name, ifa->ifa_name, sizeof(paifr.ifr_name));
if (sizeof(paifr.ifr_addr) >= ifa->ifa_addr->sa_len) {
memcpy(&paifr.ifr_addr, ifa->ifa_addr,
ifa->ifa_addr->sa_len);
}
if (args->ifname != NULL && strcmp(args->ifname, ifa->ifa_name) != 0)
continue;
if (ifa->ifa_addr->sa_family == AF_LINK)
sdl = satosdl_c(ifa->ifa_addr);
else
sdl = NULL;
if (cp != NULL && strcmp(cp, ifa->ifa_name) == 0 && !args->namesonly)
continue;
if (isnametoolong(ifa->ifa_name)) {
warnx("%s: interface name too long, skipping",
ifa->ifa_name);
continue;
}
cp = ifa->ifa_name;
if (!match_if_flags(args, ifa->ifa_flags))
continue;
if (!group_member(ifa->ifa_name, args->matchgroup, args->nogroup))
continue;
ctx->ifname = cp;
/*
* Are we just listing the interfaces?
*/
if (args->namesonly) {
if (namecp == cp)
continue;
if (!match_afp(args->afp, ifa->ifa_addr->sa_family, sdl))
continue;
namecp = cp;
ifindex++;
if (ifindex > 1)
printf(" ");
fputs(cp, stdout);
continue;
}
ifindex++;
if (args->argc > 0)
ifconfig(ctx, 0, args->afp);
else
status(ctx, sdl, ifa);
}
if (args->namesonly)
printf("\n");
freeifaddrs(ifap);
}
#endif
/*
* Returns true if an interface should be listed because any its groups
* matches shell pattern "match" and none of groups matches pattern "nomatch".
* If any pattern is NULL, corresponding condition is skipped.
*/
bool
group_member(const char *ifname, const char *match, const char *nomatch)
{
static int sock = -1;
struct ifgroupreq ifgr;
struct ifg_req *ifg;
unsigned int len;
bool matched, nomatched;
/* Sanity checks. */
if (match == NULL && nomatch == NULL)
return (true);
if (ifname == NULL)
return (false);
memset(&ifgr, 0, sizeof(ifgr));
strlcpy(ifgr.ifgr_name, ifname, IFNAMSIZ);
/* The socket is opened once. Let _exit() close it. */
if (sock == -1) {
sock = socket(AF_LOCAL, SOCK_DGRAM, 0);
if (sock == -1)
errx(1, "%s: socket(AF_LOCAL,SOCK_DGRAM)", __func__);
}
/* Determine amount of memory for the list of groups. */
if (ioctl(sock, SIOCGIFGROUP, (caddr_t)&ifgr) == -1) {
if (errno == EINVAL || errno == ENOTTY)
return (false);
else
errx(1, "%s: SIOCGIFGROUP", __func__);
}
/* Obtain the list of groups. */
len = ifgr.ifgr_len;
ifgr.ifgr_groups =
(struct ifg_req *)calloc(len / sizeof(*ifg), sizeof(*ifg));
if (ifgr.ifgr_groups == NULL)
errx(1, "%s: no memory", __func__);
if (ioctl(sock, SIOCGIFGROUP, (caddr_t)&ifgr) == -1)
errx(1, "%s: SIOCGIFGROUP", __func__);
/* Perform matching. */
matched = false;
nomatched = true;
for (ifg = ifgr.ifgr_groups; ifg && len >= sizeof(*ifg); ifg++) {
len -= sizeof(*ifg);
if (match && !matched)
matched = !fnmatch(match, ifg->ifgrq_group, 0);
if (nomatch && nomatched)
nomatched = fnmatch(nomatch, ifg->ifgrq_group, 0);
}
free(ifgr.ifgr_groups);
if (match && !nomatch)
return (matched);
if (!match && nomatch)
return (nomatched);
return (matched && nomatched);
}
static struct afswtch *afs = NULL;
void
af_register(struct afswtch *p)
{
p->af_next = afs;
afs = p;
}
static struct afswtch *
af_getbyname(const char *name)
{
struct afswtch *afp;
for (afp = afs; afp != NULL; afp = afp->af_next)
if (strcmp(afp->af_name, name) == 0)
return afp;
return NULL;
}
struct afswtch *
af_getbyfamily(int af)
{
struct afswtch *afp;
for (afp = afs; afp != NULL; afp = afp->af_next)
if (afp->af_af == af)
return afp;
return NULL;
}
void
af_other_status(if_ctx *ctx)
{
struct afswtch *afp;
uint8_t afmask[howmany(AF_MAX, NBBY)];
memset(afmask, 0, sizeof(afmask));
for (afp = afs; afp != NULL; afp = afp->af_next) {
if (afp->af_other_status == NULL)
continue;
if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af))
continue;
afp->af_other_status(ctx);
setbit(afmask, afp->af_af);
}
}
static void
af_all_tunnel_status(if_ctx *ctx)
{
struct afswtch *afp;
uint8_t afmask[howmany(AF_MAX, NBBY)];
memset(afmask, 0, sizeof(afmask));
for (afp = afs; afp != NULL; afp = afp->af_next) {
if (afp->af_status_tunnel == NULL)
continue;
if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af))
continue;
afp->af_status_tunnel(ctx);
setbit(afmask, afp->af_af);
}
}
static struct cmd *cmds = NULL;
void
cmd_register(struct cmd *p)
{
p->c_next = cmds;
cmds = p;
}
static const struct cmd *
cmd_lookup(const char *name, int iscreate)
{
const struct cmd *p;
for (p = cmds; p != NULL; p = p->c_next)
if (strcmp(name, p->c_name) == 0) {
if (iscreate) {
if (p->c_iscloneop)
return p;
} else {
if (!p->c_iscloneop)
return p;
}
}
return NULL;
}
struct callback {
callback_func *cb_func;
void *cb_arg;
struct callback *cb_next;
};
static struct callback *callbacks = NULL;
void
callback_register(callback_func *func, void *arg)
{
struct callback *cb;
cb = malloc(sizeof(struct callback));
if (cb == NULL)
errx(1, "unable to allocate memory for callback");
cb->cb_func = func;
cb->cb_arg = arg;
cb->cb_next = callbacks;
callbacks = cb;
}
/* specially-handled commands */
static void setifaddr(if_ctx *ctx, const char *addr, int param);
static const struct cmd setifaddr_cmd = DEF_CMD("ifaddr", 0, setifaddr);
static void setifdstaddr(if_ctx *ctx, const char *addr, int param __unused);
static const struct cmd setifdstaddr_cmd =
DEF_CMD("ifdstaddr", 0, setifdstaddr);
int
af_exec_ioctl(if_ctx *ctx, unsigned long action, void *data)
{
struct ifreq *req = (struct ifreq *)data;
strlcpy(req->ifr_name, ctx->ifname, sizeof(req->ifr_name));
if (ioctl_ctx(ctx, action, req) == 0)
return (0);
return (errno);
}
static void
delifaddr(if_ctx *ctx, const struct afswtch *afp)
{
int error;
if (afp->af_exec == NULL) {
warnx("interface %s cannot change %s addresses!",
ctx->ifname, afp->af_name);
clearaddr = 0;
return;
}
error = afp->af_exec(ctx, afp->af_difaddr, afp->af_ridreq);
if (error != 0) {
if (error == EADDRNOTAVAIL && (doalias >= 0)) {
/* means no previous address for interface */
} else
Perrorc("ioctl (SIOCDIFADDR)", error);
}
}
static void
addifaddr(if_ctx *ctx, const struct afswtch *afp)
{
if (afp->af_exec == NULL) {
warnx("interface %s cannot change %s addresses!",
ctx->ifname, afp->af_name);
newaddr = 0;
return;
}
if (setaddr || setmask) {
int error = afp->af_exec(ctx, afp->af_aifaddr, afp->af_addreq);
if (error != 0)
Perrorc("ioctl (SIOCAIFADDR)", error);
}
}
int
ifconfig_ioctl(if_ctx *orig_ctx, int iscreate, const struct afswtch *uafp)
{
const struct afswtch *afp, *nafp;
const struct cmd *p;
struct callback *cb;
int s;
int argc = orig_ctx->args->argc;
char *const *argv = orig_ctx->args->argv;
struct ifconfig_context _ctx = {
.args = orig_ctx->args,
.io_ss = orig_ctx->io_ss,
.ifname = orig_ctx->ifname,
};
struct ifconfig_context *ctx = &_ctx;
struct ifreq ifr = {};
strlcpy(ifr.ifr_name, ctx->ifname, sizeof ifr.ifr_name);
afp = NULL;
if (uafp != NULL)
afp = uafp;
/*
* This is the historical "accident" allowing users to configure IPv4
* addresses without the "inet" keyword which while a nice feature has
* proven to complicate other things. We cannot remove this but only
* make sure we will never have a similar implicit default for IPv6 or
* any other address familiy. We need a fallback though for
* ifconfig IF up/down etc. to work without INET support as people
* never used ifconfig IF link up/down, etc. either.
*/
#ifndef RESCUE
#ifdef INET
if (afp == NULL && feature_present("inet"))
afp = af_getbyname("inet");
#endif
#endif
if (afp == NULL)
afp = af_getbyname("link");
if (afp == NULL) {
warnx("Please specify an address_family.");
usage();
}
top:
ifr.ifr_addr.sa_family =
afp->af_af == AF_LINK || afp->af_af == AF_UNSPEC ?
AF_LOCAL : afp->af_af;
if ((s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0)) < 0 &&
(uafp != NULL || errno != EAFNOSUPPORT ||
(s = socket(AF_LOCAL, SOCK_DGRAM, 0)) < 0))
err(1, "socket(family %u,SOCK_DGRAM)", ifr.ifr_addr.sa_family);
ctx->io_s = s;
ctx->afp = afp;
while (argc > 0) {
p = cmd_lookup(*argv, iscreate);
if (iscreate && p == NULL) {
/*
* Push the clone create callback so the new
* device is created and can be used for any
* remaining arguments.
*/
cb = callbacks;
if (cb == NULL)
errx(1, "internal error, no callback");
callbacks = cb->cb_next;
cb->cb_func(ctx, cb->cb_arg);
iscreate = 0;
/*
* Handle any address family spec that
* immediately follows and potentially
* recreate the socket.
*/
nafp = af_getbyname(*argv);
if (nafp != NULL) {
argc--, argv++;
if (nafp != afp) {
close(s);
afp = nafp;
goto top;
}
}
/*
* Look for a normal parameter.
*/
continue;
}
if (p == NULL) {
/*
* Not a recognized command, choose between setting
* the interface address and the dst address.
*/
p = (setaddr ? &setifdstaddr_cmd : &setifaddr_cmd);
}
if (p->c_parameter == NEXTARG && p->c_u.c_func) {
if (argv[1] == NULL)
errx(1, "'%s' requires argument",
p->c_name);
p->c_u.c_func(ctx, argv[1], 0);
argc--, argv++;
} else if (p->c_parameter == OPTARG && p->c_u.c_func) {
p->c_u.c_func(ctx, argv[1], 0);
if (argv[1] != NULL)
argc--, argv++;
} else if (p->c_parameter == NEXTARG2 && p->c_u.c_func2) {
if (argc < 3)
errx(1, "'%s' requires 2 arguments",
p->c_name);
p->c_u.c_func2(ctx, argv[1], argv[2]);
argc -= 2, argv += 2;
} else if (p->c_parameter == SPARAM && p->c_u.c_func3) {
p->c_u.c_func3(ctx, *argv, p->c_sparameter);
} else if (p->c_u.c_func)
p->c_u.c_func(ctx, *argv, p->c_parameter);
argc--, argv++;
}
/*
* Do any post argument processing required by the address family.
*/
if (afp->af_postproc != NULL)
afp->af_postproc(ctx, newaddr, getifflags(ctx->ifname, s, true));
/*
* Do deferred callbacks registered while processing
* command-line arguments.
*/
for (cb = callbacks; cb != NULL; cb = cb->cb_next)
cb->cb_func(ctx, cb->cb_arg);
/*
* Do deferred operations.
*/
if (clearaddr)
delifaddr(ctx, afp);
if (newaddr)
addifaddr(ctx, afp);
close(s);
return(0);
}
static void
setifaddr(if_ctx *ctx, const char *addr, int param __unused)
{
const struct afswtch *afp = ctx->afp;
if (afp->af_getaddr == NULL)
return;
/*
* Delay the ioctl to set the interface addr until flags are all set.
* The address interpretation may depend on the flags,
* and the flags may change when the address is set.
*/
setaddr++;
if (doalias == 0 && afp->af_af != AF_LINK)
clearaddr = 1;
afp->af_getaddr(addr, (doalias >= 0 ? ADDR : RIDADDR));
}
static void
settunnel(if_ctx *ctx, const char *src, const char *dst)
{
const struct afswtch *afp = ctx->afp;
struct addrinfo *srcres, *dstres;
int ecode;
if (afp->af_settunnel == NULL) {
warn("address family %s does not support tunnel setup",
afp->af_name);
return;
}
if ((ecode = getaddrinfo(src, NULL, NULL, &srcres)) != 0)
errx(1, "error in parsing address string: %s",
gai_strerror(ecode));
if ((ecode = getaddrinfo(dst, NULL, NULL, &dstres)) != 0)
errx(1, "error in parsing address string: %s",
gai_strerror(ecode));
if (srcres->ai_addr->sa_family != dstres->ai_addr->sa_family)
errx(1,
"source and destination address families do not match");
afp->af_settunnel(ctx, srcres, dstres);
freeaddrinfo(srcres);
freeaddrinfo(dstres);
}
static void
deletetunnel(if_ctx *ctx, const char *vname __unused, int param __unused)
{
struct ifreq ifr = {};
if (ioctl_ctx_ifr(ctx, SIOCDIFPHYADDR, &ifr) < 0)
err(1, "SIOCDIFPHYADDR");
}
#ifdef JAIL
static void
setifvnet(if_ctx *ctx, const char *jname, int dummy __unused)
{
struct ifreq ifr = {};
ifr.ifr_jid = jail_getid(jname);
if (ifr.ifr_jid < 0)
errx(1, "%s", jail_errmsg);
if (ioctl_ctx_ifr(ctx, SIOCSIFVNET, &ifr) < 0)
err(1, "SIOCSIFVNET");
}
static void
setifrvnet(if_ctx *ctx, const char *jname, int dummy __unused)
{
struct ifreq ifr = {};
ifr.ifr_jid = jail_getid(jname);
if (ifr.ifr_jid < 0)
errx(1, "%s", jail_errmsg);
if (ioctl_ctx_ifr(ctx, SIOCSIFRVNET, &ifr) < 0)
err(1, "SIOCSIFRVNET(%d, %s)", ifr.ifr_jid, ifr.ifr_name);
}
#endif
static void
setifnetmask(if_ctx *ctx, const char *addr, int dummy __unused)
{
const struct afswtch *afp = ctx->afp;
if (afp->af_getaddr != NULL) {
setmask++;
afp->af_getaddr(addr, MASK);
}
}
static void
setifbroadaddr(if_ctx *ctx, const char *addr, int dummy __unused)
{
const struct afswtch *afp = ctx->afp;
if (afp->af_getaddr != NULL)
afp->af_getaddr(addr, BRDADDR);
}
static void
notealias(if_ctx *ctx, const char *addr __unused, int param)
{
const struct afswtch *afp = ctx->afp;
if (setaddr && doalias == 0 && param < 0) {
if (afp->af_copyaddr != NULL)
afp->af_copyaddr(ctx, RIDADDR, ADDR);
}
doalias = param;
if (param < 0) {
clearaddr = 1;
newaddr = 0;
} else
clearaddr = 0;
}
static void
setifdstaddr(if_ctx *ctx, const char *addr, int param __unused)
{
const struct afswtch *afp = ctx->afp;
if (afp->af_getaddr != NULL)
afp->af_getaddr(addr, DSTADDR);
}
static int
getifflags(const char *ifname, int us, bool err_ok)
{
struct ifreq my_ifr;
int s;
memset(&my_ifr, 0, sizeof(my_ifr));
(void) strlcpy(my_ifr.ifr_name, ifname, sizeof(my_ifr.ifr_name));
if (us < 0) {
if ((s = socket(AF_LOCAL, SOCK_DGRAM, 0)) < 0)
err(1, "socket(family AF_LOCAL,SOCK_DGRAM");
} else
s = us;
if (ioctl(s, SIOCGIFFLAGS, (caddr_t)&my_ifr) < 0) {
if (!err_ok) {
Perror("ioctl (SIOCGIFFLAGS)");
exit(1);
}
}
if (us < 0)
close(s);
return ((my_ifr.ifr_flags & 0xffff) | (my_ifr.ifr_flagshigh << 16));
}
/*
* Note: doing an SIOCIGIFFLAGS scribbles on the union portion
* of the ifreq structure, which may confuse other parts of ifconfig.
* Make a private copy so we can avoid that.
*/
static void
clearifflags(if_ctx *ctx, const char *vname, int value)
{
struct ifreq my_ifr;
int flags;
flags = getifflags(ctx->ifname, ctx->io_s, false);
flags &= ~value;
memset(&my_ifr, 0, sizeof(my_ifr));
strlcpy(my_ifr.ifr_name, ctx->ifname, sizeof(my_ifr.ifr_name));
my_ifr.ifr_flags = flags & 0xffff;
my_ifr.ifr_flagshigh = flags >> 16;
if (ioctl(ctx->io_s, SIOCSIFFLAGS, (caddr_t)&my_ifr) < 0)
Perror(vname);
}
static void
setifflags(if_ctx *ctx, const char *vname, int value)
{
struct ifreq my_ifr;
int flags;
flags = getifflags(ctx->ifname, ctx->io_s, false);
flags |= value;
memset(&my_ifr, 0, sizeof(my_ifr));
strlcpy(my_ifr.ifr_name, ctx->ifname, sizeof(my_ifr.ifr_name));
my_ifr.ifr_flags = flags & 0xffff;
my_ifr.ifr_flagshigh = flags >> 16;
if (ioctl(ctx->io_s, SIOCSIFFLAGS, (caddr_t)&my_ifr) < 0)
Perror(vname);
}
void
clearifcap(if_ctx *ctx, const char *vname, int value)
{
struct ifreq ifr = {};
int flags;
if (ioctl_ctx_ifr(ctx, SIOCGIFCAP, &ifr) < 0) {
Perror("ioctl (SIOCGIFCAP)");
exit(1);
}
flags = ifr.ifr_curcap;
flags &= ~value;
flags &= ifr.ifr_reqcap;
/* Check for no change in capabilities. */
if (ifr.ifr_curcap == flags)
return;
ifr.ifr_reqcap = flags;
if (ioctl_ctx(ctx, SIOCSIFCAP, &ifr) < 0)
Perror(vname);
}
void
setifcap(if_ctx *ctx, const char *vname, int value)
{
struct ifreq ifr = {};
int flags;
if (ioctl_ctx_ifr(ctx, SIOCGIFCAP, &ifr) < 0) {
Perror("ioctl (SIOCGIFCAP)");
exit(1);
}
flags = ifr.ifr_curcap;
flags |= value;
flags &= ifr.ifr_reqcap;
/* Check for no change in capabilities. */
if (ifr.ifr_curcap == flags)
return;
ifr.ifr_reqcap = flags;
if (ioctl_ctx(ctx, SIOCSIFCAP, &ifr) < 0)
Perror(vname);
}
void
setifcapnv(if_ctx *ctx, const char *vname, const char *arg)
{
nvlist_t *nvcap;
void *buf;
char *marg, *mopt;
size_t nvbuflen;
bool neg;
struct ifreq ifr = {};
if (ioctl_ctx_ifr(ctx, SIOCGIFCAP, &ifr) < 0)
Perror("ioctl (SIOCGIFCAP)");
if ((ifr.ifr_curcap & IFCAP_NV) == 0) {
warnx("IFCAP_NV not supported");
return; /* Not exit() */
}
marg = strdup(arg);
if (marg == NULL)
Perror("strdup");
nvcap = nvlist_create(0);
if (nvcap == NULL)
Perror("nvlist_create");
while ((mopt = strsep(&marg, ",")) != NULL) {
neg = *mopt == '-';
if (neg)
mopt++;
if (strcmp(mopt, "rxtls") == 0) {
nvlist_add_bool(nvcap, "rxtls4", !neg);
nvlist_add_bool(nvcap, "rxtls6", !neg);
} else {
nvlist_add_bool(nvcap, mopt, !neg);
}
}
buf = nvlist_pack(nvcap, &nvbuflen);
if (buf == NULL) {
errx(1, "nvlist_pack error");
exit(1);
}
ifr.ifr_cap_nv.buf_length = ifr.ifr_cap_nv.length = nvbuflen;
ifr.ifr_cap_nv.buffer = buf;
if (ioctl_ctx(ctx, SIOCSIFCAPNV, (caddr_t)&ifr) < 0)
Perror(vname);
free(buf);
nvlist_destroy(nvcap);
free(marg);
}
static void
setifmetric(if_ctx *ctx, const char *val, int dummy __unused)
{
struct ifreq ifr = {};
ifr.ifr_metric = atoi(val);
if (ioctl_ctx_ifr(ctx, SIOCSIFMETRIC, &ifr) < 0)
err(1, "ioctl SIOCSIFMETRIC (set metric)");
}
static void
setifmtu(if_ctx *ctx, const char *val, int dummy __unused)
{
struct ifreq ifr = {};
ifr.ifr_mtu = atoi(val);
if (ioctl_ctx_ifr(ctx, SIOCSIFMTU, &ifr) < 0)
err(1, "ioctl SIOCSIFMTU (set mtu)");
}
static void
setifpcp(if_ctx *ctx, const char *val, int arg __unused)
{
struct ifreq ifr = {};
u_long ul;
char *endp;
ul = strtoul(val, &endp, 0);
if (*endp != '\0')
errx(1, "invalid value for pcp");
if (ul > 7)
errx(1, "value for pcp out of range");
ifr.ifr_lan_pcp = ul;
if (ioctl_ctx_ifr(ctx, SIOCSLANPCP, &ifr) == -1)
err(1, "SIOCSLANPCP");
}
static void
disableifpcp(if_ctx *ctx, const char *val __unused, int arg __unused)
{
struct ifreq ifr = {};
ifr.ifr_lan_pcp = IFNET_PCP_NONE;
if (ioctl_ctx_ifr(ctx, SIOCSLANPCP, &ifr) == -1)
err(1, "SIOCSLANPCP");
}
static void
setifname(if_ctx *ctx, const char *val, int dummy __unused)
{
struct ifreq ifr = {};
char *newname;
ifr_set_name(&ifr, ctx->ifname);
newname = strdup(val);
if (newname == NULL)
err(1, "no memory to set ifname");
ifr.ifr_data = newname;
if (ioctl_ctx(ctx, SIOCSIFNAME, (caddr_t)&ifr) < 0) {
free(newname);
err(1, "ioctl SIOCSIFNAME (set name)");
}
ifname_update(ctx, newname);
free(newname);
}
static void
setifdescr(if_ctx *ctx, const char *val, int dummy __unused)
{
struct ifreq ifr = {};
char *newdescr;
ifr.ifr_buffer.length = strlen(val) + 1;
if (ifr.ifr_buffer.length == 1) {
ifr.ifr_buffer.buffer = newdescr = NULL;
ifr.ifr_buffer.length = 0;
} else {
newdescr = strdup(val);
ifr.ifr_buffer.buffer = newdescr;
if (newdescr == NULL) {
warn("no memory to set ifdescr");
return;
}
}
if (ioctl_ctx_ifr(ctx, SIOCSIFDESCR, &ifr) < 0)
err(1, "ioctl SIOCSIFDESCR (set descr)");
free(newdescr);
}
static void
unsetifdescr(if_ctx *ctx, const char *val __unused, int value __unused)
{
setifdescr(ctx, "", 0);
}
#ifdef WITHOUT_NETLINK
static const char *IFFBITS[] = {
[0] = "UP",
[1] = "BROADCAST",
[2] = "DEBUG",
[3] = "LOOPBACK",
[4] = "POINTOPOINT",
[6] = "RUNNING",
[7] = "NOARP",
[8] = "PROMISC",
[9] = "ALLMULTI",
[10] = "OACTIVE",
[11] = "SIMPLEX",
[12] = "LINK0",
[13] = "LINK1",
[14] = "LINK2",
[15] = "MULTICAST",
[17] = "PPROMISC",
[18] = "MONITOR",
[19] = "STATICARP",
[20] = "STICKYARP",
};
static const char *IFCAPBITS[] = {
[0] = "RXCSUM",
[1] = "TXCSUM",
[2] = "NETCONS",
[3] = "VLAN_MTU",
[4] = "VLAN_HWTAGGING",
[5] = "JUMBO_MTU",
[6] = "POLLING",
[7] = "VLAN_HWCSUM",
[8] = "TSO4",
[9] = "TSO6",
[10] = "LRO",
[11] = "WOL_UCAST",
[12] = "WOL_MCAST",
[13] = "WOL_MAGIC",
[14] = "TOE4",
[15] = "TOE6",
[16] = "VLAN_HWFILTER",
[18] = "VLAN_HWTSO",
[19] = "LINKSTATE",
[20] = "NETMAP",
[21] = "RXCSUM_IPV6",
[22] = "TXCSUM_IPV6",
[24] = "TXRTLMT",
[25] = "HWRXTSTMP",
[26] = "NOMAP",
[27] = "TXTLS4",
[28] = "TXTLS6",
[29] = "VXLAN_HWCSUM",
[30] = "VXLAN_HWTSO",
[31] = "TXTLS_RTLMT",
};
static void
print_ifcap_nv(if_ctx *ctx)
{
struct ifreq ifr = {};
nvlist_t *nvcap;
const char *nvname;
void *buf, *cookie;
bool first, val;
int type;
buf = malloc(IFR_CAP_NV_MAXBUFSIZE);
if (buf == NULL)
Perror("malloc");
ifr.ifr_cap_nv.buffer = buf;
ifr.ifr_cap_nv.buf_length = IFR_CAP_NV_MAXBUFSIZE;
if (ioctl_ctx_ifr(ctx, SIOCGIFCAPNV, &ifr) != 0)
Perror("ioctl (SIOCGIFCAPNV)");
nvcap = nvlist_unpack(ifr.ifr_cap_nv.buffer,
ifr.ifr_cap_nv.length, 0);
if (nvcap == NULL)
Perror("nvlist_unpack");
printf("\toptions");
cookie = NULL;
for (first = true;; first = false) {
nvname = nvlist_next(nvcap, &type, &cookie);
if (nvname == NULL) {
printf("\n");
break;
}
if (type == NV_TYPE_BOOL) {
val = nvlist_get_bool(nvcap, nvname);
if (val) {
printf("%c%s",
first ? ' ' : ',', nvname);
}
}
}
if (ctx->args->supmedia) {
printf("\tcapabilities");
cookie = NULL;
for (first = true;; first = false) {
nvname = nvlist_next(nvcap, &type,
&cookie);
if (nvname == NULL) {
printf("\n");
break;
}
if (type == NV_TYPE_BOOL)
printf("%c%s", first ? ' ' :
',', nvname);
}
}
nvlist_destroy(nvcap);
free(buf);
if (ioctl_ctx(ctx, SIOCGIFCAP, (caddr_t)&ifr) != 0)
Perror("ioctl (SIOCGIFCAP)");
}
static void
print_ifcap(if_ctx *ctx)
{
struct ifreq ifr = {};
if (ioctl_ctx_ifr(ctx, SIOCGIFCAP, &ifr) != 0)
return;
if ((ifr.ifr_curcap & IFCAP_NV) != 0)
print_ifcap_nv(ctx);
else {
printf("\toptions=%x", ifr.ifr_curcap);
print_bits("options", &ifr.ifr_curcap, 1, IFCAPBITS, nitems(IFCAPBITS));
putchar('\n');
if (ctx->args->supmedia && ifr.ifr_reqcap != 0) {
printf("\tcapabilities=%x", ifr.ifr_reqcap);
print_bits("capabilities", &ifr.ifr_reqcap, 1, IFCAPBITS, nitems(IFCAPBITS));
putchar('\n');
}
}
}
#endif
void
print_ifstatus(if_ctx *ctx)
{
struct ifstat ifs;
strlcpy(ifs.ifs_name, ctx->ifname, sizeof ifs.ifs_name);
if (ioctl_ctx(ctx, SIOCGIFSTATUS, &ifs) == 0)
printf("%s", ifs.ascii);
}
void
print_metric(if_ctx *ctx)
{
struct ifreq ifr = {};
if (ioctl_ctx_ifr(ctx, SIOCGIFMETRIC, &ifr) != -1)
printf(" metric %d", ifr.ifr_metric);
}
#ifdef WITHOUT_NETLINK
static void
print_mtu(if_ctx *ctx)
{
struct ifreq ifr = {};
if (ioctl_ctx_ifr(ctx, SIOCGIFMTU, &ifr) != -1)
printf(" mtu %d", ifr.ifr_mtu);
}
static void
print_description(if_ctx *ctx)
{
struct ifreq ifr = {};
ifr_set_name(&ifr, ctx->ifname);
for (;;) {
if ((descr = reallocf(descr, descrlen)) != NULL) {
ifr.ifr_buffer.buffer = descr;
ifr.ifr_buffer.length = descrlen;
if (ioctl_ctx(ctx, SIOCGIFDESCR, &ifr) == 0) {
if (ifr.ifr_buffer.buffer == descr) {
if (strlen(descr) > 0)
printf("\tdescription: %s\n",
descr);
} else if (ifr.ifr_buffer.length > descrlen) {
descrlen = ifr.ifr_buffer.length;
continue;
}
}
} else
warn("unable to allocate memory for interface"
"description");
break;
}
}
/*
* Print the status of the interface. If an address family was
* specified, show only it; otherwise, show them all.
*/
static void
status(if_ctx *ctx, const struct sockaddr_dl *sdl __unused, struct ifaddrs *ifa)
{
struct ifaddrs *ift;
int s, old_s;
struct ifconfig_args *args = ctx->args;
bool allfamilies = args->afp == NULL;
struct ifreq ifr = {};
if (args->afp == NULL)
ifr.ifr_addr.sa_family = AF_LOCAL;
else
ifr.ifr_addr.sa_family =
args->afp->af_af == AF_LINK ? AF_LOCAL : args->afp->af_af;
s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0);
if (s < 0)
err(1, "socket(family %u,SOCK_DGRAM)", ifr.ifr_addr.sa_family);
old_s = ctx->io_s;
ctx->io_s = s;
printf("%s: flags=%x", ctx->ifname, ifa->ifa_flags);
print_bits("flags", &ifa->ifa_flags, 1, IFFBITS, nitems(IFFBITS));
print_metric(ctx);
print_mtu(ctx);
putchar('\n');
print_description(ctx);
print_ifcap(ctx);
tunnel_status(ctx);
for (ift = ifa; ift != NULL; ift = ift->ifa_next) {
if (ift->ifa_addr == NULL)
continue;
if (strcmp(ifa->ifa_name, ift->ifa_name) != 0)
continue;
if (allfamilies) {
const struct afswtch *p;
p = af_getbyfamily(ift->ifa_addr->sa_family);
if (p != NULL && p->af_status != NULL)
p->af_status(ctx, ift);
} else if (args->afp->af_af == ift->ifa_addr->sa_family)
args->afp->af_status(ctx, ift);
}
#if 0
if (allfamilies || afp->af_af == AF_LINK) {
const struct afswtch *lafp;
/*
* Hack; the link level address is received separately
* from the routing information so any address is not
* handled above. Cobble together an entry and invoke
* the status method specially.
*/
lafp = af_getbyname("lladdr");
if (lafp != NULL) {
info.rti_info[RTAX_IFA] = (struct sockaddr *)sdl;
lafp->af_status(s, &info);
}
}
#endif
if (allfamilies)
af_other_status(ctx);
else if (args->afp->af_other_status != NULL)
args->afp->af_other_status(ctx);
print_ifstatus(ctx);
if (args->verbose > 0)
sfp_status(ctx);
close(s);
ctx->io_s = old_s;
return;
}
#endif
void
tunnel_status(if_ctx *ctx)
{
af_all_tunnel_status(ctx);
}
static void
Perrorc(const char *cmd, int error)
{
switch (errno) {
case ENXIO:
errx(1, "%s: no such interface", cmd);
break;
case EPERM:
errx(1, "%s: permission denied", cmd);
break;
default:
errc(1, error, "%s", cmd);
}
}
void
Perror(const char *cmd)
{
Perrorc(cmd, errno);
}
void
print_bits(const char *btype, uint32_t *v, const int v_count,
const char **names, const int n_count)
{
int num = 0;
for (int i = 0; i < v_count * 32; i++) {
bool is_set = v[i / 32] & (1U << (i % 32));
if (is_set) {
if (num++ == 0)
printf("<");
if (num != 1)
printf(",");
if (i < n_count)
printf("%s", names[i]);
else
printf("%s_%d", btype, i);
}
}
if (num > 0)
printf(">");
}
/*
* Print a value a la the %b format of the kernel's printf
*/
void
printb(const char *s, unsigned v, const char *bits)
{
int i, any = 0;
char c;
if (bits && *bits == 8)
printf("%s=%o", s, v);
else
printf("%s=%x", s, v);
if (bits) {
bits++;
putchar('<');
while ((i = *bits++) != '\0') {
if (v & (1u << (i-1))) {
if (any)
putchar(',');
any = 1;
for (; (c = *bits) > 32; bits++)
putchar(c);
} else
for (; *bits > 32; bits++)
;
}
putchar('>');
}
}
void
print_vhid(const struct ifaddrs *ifa)
{
struct if_data *ifd;
if (ifa->ifa_data == NULL)
return;
ifd = ifa->ifa_data;
if (ifd->ifi_vhid == 0)
return;
printf(" vhid %d", ifd->ifi_vhid);
}
void
ifmaybeload(struct ifconfig_args *args, const char *name)
{
#define MOD_PREFIX_LEN 3 /* "if_" */
struct module_stat mstat;
int fileid, modid;
char ifkind[IFNAMSIZ + MOD_PREFIX_LEN], ifname[IFNAMSIZ], *dp;
const char *cp;
struct module_map_entry *mme;
bool found;
/* loading suppressed by the user */
if (args->noload)
return;
/* trim the interface number off the end */
strlcpy(ifname, name, sizeof(ifname));
dp = ifname + strlen(ifname) - 1;
for (; dp > ifname; dp--) {
if (isdigit(*dp))
*dp = '\0';
else
break;
}
/* Either derive it from the map or guess otherwise */
*ifkind = '\0';
found = false;
for (unsigned i = 0; i < nitems(module_map); ++i) {
mme = &module_map[i];
if (strcmp(mme->ifname, ifname) == 0) {
strlcpy(ifkind, mme->kldname, sizeof(ifkind));
found = true;
break;
}
}
/* We didn't have an alias for it... we'll guess. */
if (!found) {
/* turn interface and unit into module name */
strlcpy(ifkind, "if_", sizeof(ifkind));
strlcat(ifkind, ifname, sizeof(ifkind));
}
/* scan files in kernel */
mstat.version = sizeof(struct module_stat);
for (fileid = kldnext(0); fileid > 0; fileid = kldnext(fileid)) {
/* scan modules in file */
for (modid = kldfirstmod(fileid); modid > 0;
modid = modfnext(modid)) {
if (modstat(modid, &mstat) < 0)
continue;
/* strip bus name if present */
if ((cp = strchr(mstat.name, '/')) != NULL) {
cp++;
} else {
cp = mstat.name;
}
/*
* Is it already loaded? Don't compare with ifname if
* we were specifically told which kld to use. Doing
* so could lead to conflicts not trivially solved.
*/
if ((!found && strcmp(ifname, cp) == 0) ||
strcmp(ifkind, cp) == 0)
return;
}
}
/*
* Try to load the module. But ignore failures, because ifconfig can't
* infer the names of all drivers (eg mlx4en(4)).
*/
(void) kldload(ifkind);
}
static struct cmd basic_cmds[] = {
DEF_CMD("up", IFF_UP, setifflags),
DEF_CMD("down", IFF_UP, clearifflags),
DEF_CMD("arp", IFF_NOARP, clearifflags),
DEF_CMD("-arp", IFF_NOARP, setifflags),
DEF_CMD("debug", IFF_DEBUG, setifflags),
DEF_CMD("-debug", IFF_DEBUG, clearifflags),
DEF_CMD_ARG("description", setifdescr),
DEF_CMD_ARG("descr", setifdescr),
DEF_CMD("-description", 0, unsetifdescr),
DEF_CMD("-descr", 0, unsetifdescr),
DEF_CMD("promisc", IFF_PPROMISC, setifflags),
DEF_CMD("-promisc", IFF_PPROMISC, clearifflags),
DEF_CMD("add", IFF_UP, notealias),
DEF_CMD("alias", IFF_UP, notealias),
DEF_CMD("-alias", -IFF_UP, notealias),
DEF_CMD("delete", -IFF_UP, notealias),
DEF_CMD("remove", -IFF_UP, notealias),
#ifdef notdef
#define EN_SWABIPS 0x1000
DEF_CMD("swabips", EN_SWABIPS, setifflags),
DEF_CMD("-swabips", EN_SWABIPS, clearifflags),
#endif
DEF_CMD_ARG("netmask", setifnetmask),
DEF_CMD_ARG("metric", setifmetric),
DEF_CMD_ARG("broadcast", setifbroadaddr),
DEF_CMD_ARG2("tunnel", settunnel),
DEF_CMD("-tunnel", 0, deletetunnel),
DEF_CMD("deletetunnel", 0, deletetunnel),
#ifdef JAIL
DEF_CMD_ARG("vnet", setifvnet),
DEF_CMD_ARG("-vnet", setifrvnet),
#endif
DEF_CMD("link0", IFF_LINK0, setifflags),
DEF_CMD("-link0", IFF_LINK0, clearifflags),
DEF_CMD("link1", IFF_LINK1, setifflags),
DEF_CMD("-link1", IFF_LINK1, clearifflags),
DEF_CMD("link2", IFF_LINK2, setifflags),
DEF_CMD("-link2", IFF_LINK2, clearifflags),
DEF_CMD("monitor", IFF_MONITOR, setifflags),
DEF_CMD("-monitor", IFF_MONITOR, clearifflags),
DEF_CMD("mextpg", IFCAP_MEXTPG, setifcap),
DEF_CMD("-mextpg", IFCAP_MEXTPG, clearifcap),
DEF_CMD("staticarp", IFF_STATICARP, setifflags),
DEF_CMD("-staticarp", IFF_STATICARP, clearifflags),
DEF_CMD("stickyarp", IFF_STICKYARP, setifflags),
DEF_CMD("-stickyarp", IFF_STICKYARP, clearifflags),
DEF_CMD("rxcsum6", IFCAP_RXCSUM_IPV6, setifcap),
DEF_CMD("-rxcsum6", IFCAP_RXCSUM_IPV6, clearifcap),
DEF_CMD("txcsum6", IFCAP_TXCSUM_IPV6, setifcap),
DEF_CMD("-txcsum6", IFCAP_TXCSUM_IPV6, clearifcap),
DEF_CMD("rxcsum", IFCAP_RXCSUM, setifcap),
DEF_CMD("-rxcsum", IFCAP_RXCSUM, clearifcap),
DEF_CMD("txcsum", IFCAP_TXCSUM, setifcap),
DEF_CMD("-txcsum", IFCAP_TXCSUM, clearifcap),
DEF_CMD("netcons", IFCAP_NETCONS, setifcap),
DEF_CMD("-netcons", IFCAP_NETCONS, clearifcap),
DEF_CMD_ARG("pcp", setifpcp),
DEF_CMD("-pcp", 0, disableifpcp),
DEF_CMD("polling", IFCAP_POLLING, setifcap),
DEF_CMD("-polling", IFCAP_POLLING, clearifcap),
DEF_CMD("tso6", IFCAP_TSO6, setifcap),
DEF_CMD("-tso6", IFCAP_TSO6, clearifcap),
DEF_CMD("tso4", IFCAP_TSO4, setifcap),
DEF_CMD("-tso4", IFCAP_TSO4, clearifcap),
DEF_CMD("tso", IFCAP_TSO, setifcap),
DEF_CMD("-tso", IFCAP_TSO, clearifcap),
DEF_CMD("toe", IFCAP_TOE, setifcap),
DEF_CMD("-toe", IFCAP_TOE, clearifcap),
DEF_CMD("lro", IFCAP_LRO, setifcap),
DEF_CMD("-lro", IFCAP_LRO, clearifcap),
DEF_CMD("txtls", IFCAP_TXTLS, setifcap),
DEF_CMD("-txtls", IFCAP_TXTLS, clearifcap),
DEF_CMD_SARG("rxtls", IFCAP2_RXTLS4_NAME "," IFCAP2_RXTLS6_NAME,
setifcapnv),
DEF_CMD_SARG("-rxtls", "-"IFCAP2_RXTLS4_NAME ",-" IFCAP2_RXTLS6_NAME,
setifcapnv),
DEF_CMD("wol", IFCAP_WOL, setifcap),
DEF_CMD("-wol", IFCAP_WOL, clearifcap),
DEF_CMD("wol_ucast", IFCAP_WOL_UCAST, setifcap),
DEF_CMD("-wol_ucast", IFCAP_WOL_UCAST, clearifcap),
DEF_CMD("wol_mcast", IFCAP_WOL_MCAST, setifcap),
DEF_CMD("-wol_mcast", IFCAP_WOL_MCAST, clearifcap),
DEF_CMD("wol_magic", IFCAP_WOL_MAGIC, setifcap),
DEF_CMD("-wol_magic", IFCAP_WOL_MAGIC, clearifcap),
DEF_CMD("txrtlmt", IFCAP_TXRTLMT, setifcap),
DEF_CMD("-txrtlmt", IFCAP_TXRTLMT, clearifcap),
DEF_CMD("txtlsrtlmt", IFCAP_TXTLS_RTLMT, setifcap),
DEF_CMD("-txtlsrtlmt", IFCAP_TXTLS_RTLMT, clearifcap),
DEF_CMD("hwrxtstmp", IFCAP_HWRXTSTMP, setifcap),
DEF_CMD("-hwrxtstmp", IFCAP_HWRXTSTMP, clearifcap),
DEF_CMD("normal", IFF_LINK0, clearifflags),
DEF_CMD("compress", IFF_LINK0, setifflags),
DEF_CMD("noicmp", IFF_LINK1, setifflags),
DEF_CMD_ARG("mtu", setifmtu),
DEF_CMD_ARG("name", setifname),
};
static __constructor void
ifconfig_ctor(void)
{
size_t i;
for (i = 0; i < nitems(basic_cmds); i++)
cmd_register(&basic_cmds[i]);
}
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