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freebsd-dev/sbin/ifconfig/ifconfig.c
Andrey V. Elsukov edcc075398 Fix grammar. 
Reported by:	yuripv
MFC after:	3 weeks
2018-10-21 14:48:40 +00:00

1519 lines
36 KiB
C
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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.
*/
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1983, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)ifconfig.c 8.2 (Berkeley) 2/16/94";
#endif
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/module.h>
#include <sys/linker.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_types.h>
#include <net/route.h>
/* IP */
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <ifaddrs.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#ifdef JAIL
#include <jail.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "ifconfig.h"
/*
* Since "struct ifreq" is composed of various union members, callers
* should pay special attention to interpret the value.
* (.e.g. little/big endian difference in the structure.)
*/
struct ifreq ifr;
char name[IFNAMSIZ];
char *descr = NULL;
size_t descrlen = 64;
int setaddr;
int setmask;
int doalias;
int clearaddr;
int newaddr = 1;
int verbose;
int noload;
int printifname = 0;
int supmedia = 0;
int printkeys = 0; /* Print keying material for interfaces. */
int exit_code = 0;
/* Formatter Strings */
char *f_inet, *f_inet6, *f_ether, *f_addr;
static int ifconfig(int argc, char *const *argv, int iscreate,
const struct afswtch *afp);
static void status(const struct afswtch *afp, const struct sockaddr_dl *sdl,
struct ifaddrs *ifa);
static void tunnel_status(int s);
static _Noreturn void usage(void);
static struct afswtch *af_getbyname(const char *name);
static struct afswtch *af_getbyfamily(int af);
static void af_other_status(int);
void printifnamemaybe(void);
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);
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 [-f type:format] %sinterface address_family\n"
" [address [dest_address]] [parameters]\n"
" ifconfig interface create\n"
" ifconfig -a %s[-d] [-m] [-u] [-v] [address_family]\n"
" ifconfig -l [-d] [-u] [address_family]\n"
" ifconfig %s[-d] [-m] [-u] [-v]\n",
options, options, options);
exit(1);
}
#define ORDERS_SIZE(x) sizeof(x) / sizeof(x[0])
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 < ORDERS_SIZE(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 < ORDERS_SIZE(e1->af_orders) &&
af2 < ORDERS_SIZE(e1->af_orders))
return (e1->af_orders[af1] - e1->af_orders[af2]);
}
return (0);
}
static void freeformat(void)
{
if (f_inet != NULL)
free(f_inet);
if (f_inet6 != NULL)
free(f_inet6);
if (f_ether != NULL)
free(f_ether);
if (f_addr != NULL)
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 || modifier[1] == '\0') {
warnx("Skipping invalid format specification: %s\n",
category);
continue;
}
/* Split the string on the separator, then seek past it */
modifier[0] = '\0';
modifier++;
if (strcmp(category, "addr") == 0)
f_addr = strdup(modifier);
else if (strcmp(category, "ether") == 0)
f_ether = strdup(modifier);
else if (strcmp(category, "inet") == 0)
f_inet = strdup(modifier);
else if (strcmp(category, "inet6") == 0)
f_inet6 = strdup(modifier);
}
free(formatstr);
}
#undef ORDERS_SIZE
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);
}
void printifnamemaybe()
{
if (printifname)
printf("%s\n", name);
}
int
main(int argc, char *argv[])
{
int c, all, namesonly, downonly, uponly;
const struct afswtch *afp = NULL;
int ifindex;
struct ifaddrs *ifap, *sifap, *ifa;
struct ifreq paifr;
const struct sockaddr_dl *sdl;
char options[1024], *cp, *envformat, *namecp = NULL;
struct ifa_queue q = TAILQ_HEAD_INITIALIZER(q);
struct ifa_order_elt *cur, *tmp;
const char *ifname;
struct option *p;
size_t iflen;
all = downonly = uponly = namesonly = noload = verbose = 0;
f_inet = f_inet6 = f_ether = f_addr = NULL;
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);
/* Parse leading line options */
strlcpy(options, "f:adklmnuv", 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 */
all++;
break;
case 'd': /* restrict scan to "down" interfaces */
downonly++;
break;
case 'f':
if (optarg == NULL)
usage();
setformat(optarg);
break;
case 'k':
printkeys++;
break;
case 'l': /* scan interface names only */
namesonly++;
break;
case 'm': /* show media choices in status */
supmedia = 1;
break;
case 'n': /* suppress module loading */
noload++;
break;
case 'u': /* restrict scan to "up" interfaces */
uponly++;
break;
case 'v':
verbose++;
break;
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 (namesonly && (all || supmedia))
usage();
/* nonsense.. */
if (uponly && downonly)
usage();
/* no arguments is equivalent to '-a' */
if (!namesonly && argc < 1)
all = 1;
/* -a and -l allow an address family arg to limit the output */
if (all || namesonly) {
if (argc > 1)
usage();
ifname = NULL;
ifindex = 0;
if (argc == 1) {
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 */
}
} else {
/* not listing, need an argument */
if (argc < 1)
usage();
ifname = *argv;
argc--, argv++;
/* check and maybe load support for this interface */
ifmaybeload(ifname);
ifindex = if_nametoindex(ifname);
if (ifindex == 0) {
/*
* NOTE: We must special-case the `create' command
* right here as we would otherwise fail when trying
* to find the interface.
*/
if (argc > 0 && (strcmp(argv[0], "create") == 0 ||
strcmp(argv[0], "plumb") == 0)) {
iflen = strlcpy(name, ifname, sizeof(name));
if (iflen >= sizeof(name))
errx(1, "%s: cloning name too long",
ifname);
ifconfig(argc, argv, 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 (argc > 0 && (strcmp(argv[0], "-vnet") == 0)) {
iflen = strlcpy(name, ifname, sizeof(name));
if (iflen >= sizeof(name))
errx(1, "%s: interface name too long",
ifname);
ifconfig(argc, argv, 0, NULL);
exit(exit_code);
}
#endif
errx(1, "interface %s does not exist", ifname);
} else {
/*
* Do not allow use `create` command as hostname if
* address family is not specified.
*/
if (argc > 0 && (strcmp(argv[0], "create") == 0 ||
strcmp(argv[0], "plumb") == 0)) {
if (argc == 1)
errx(1, "interface %s already exists",
ifname);
argc--, argv++;
}
}
}
/* Check for address family */
if (argc > 0) {
afp = af_getbyname(*argv);
if (afp != NULL)
argc--, argv++;
}
if (getifaddrs(&ifap) != 0)
err(EXIT_FAILURE, "getifaddrs");
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) {
memset(&paifr, 0, sizeof(paifr));
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 (ifname != NULL && strcmp(ifname, ifa->ifa_name) != 0)
continue;
if (ifa->ifa_addr->sa_family == AF_LINK)
sdl = (const struct sockaddr_dl *) ifa->ifa_addr;
else
sdl = NULL;
if (cp != NULL && strcmp(cp, ifa->ifa_name) == 0 && !namesonly)
continue;
iflen = strlcpy(name, ifa->ifa_name, sizeof(name));
if (iflen >= sizeof(name)) {
warnx("%s: interface name too long, skipping",
ifa->ifa_name);
continue;
}
cp = ifa->ifa_name;
if ((ifa->ifa_flags & IFF_CANTCONFIG) != 0)
continue;
if (downonly && (ifa->ifa_flags & IFF_UP) != 0)
continue;
if (uponly && (ifa->ifa_flags & IFF_UP) == 0)
continue;
/*
* Are we just listing the interfaces?
*/
if (namesonly) {
if (namecp == cp)
continue;
if (afp != NULL) {
/* special case for "ether" address family */
if (!strcmp(afp->af_name, "ether")) {
if (sdl == NULL ||
(sdl->sdl_type != IFT_ETHER &&
sdl->sdl_type != IFT_L2VLAN &&
sdl->sdl_type != IFT_BRIDGE) ||
sdl->sdl_alen != ETHER_ADDR_LEN)
continue;
} else {
if (ifa->ifa_addr->sa_family
!= afp->af_af)
continue;
}
}
namecp = cp;
ifindex++;
if (ifindex > 1)
printf(" ");
fputs(name, stdout);
continue;
}
ifindex++;
if (argc > 0)
ifconfig(argc, argv, 0, afp);
else
status(afp, sdl, ifa);
}
if (namesonly)
printf("\n");
freeifaddrs(ifap);
freeformat();
exit(exit_code);
}
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;
}
static 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;
}
static void
af_other_status(int s)
{
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(s);
setbit(afmask, afp->af_af);
}
}
static void
af_all_tunnel_status(int s)
{
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(s);
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(const char *, int, int, const struct afswtch *);
static const struct cmd setifaddr_cmd = DEF_CMD("ifaddr", 0, setifaddr);
static void setifdstaddr(const char *, int, int, const struct afswtch *);
static const struct cmd setifdstaddr_cmd =
DEF_CMD("ifdstaddr", 0, setifdstaddr);
static int
ifconfig(int argc, char *const *argv, int iscreate, const struct afswtch *uafp)
{
const struct afswtch *afp, *nafp;
const struct cmd *p;
struct callback *cb;
int s;
strlcpy(ifr.ifr_name, name, 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);
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(s, 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(argv[1], 0, s, afp);
argc--, argv++;
} else if (p->c_parameter == OPTARG && p->c_u.c_func) {
p->c_u.c_func(argv[1], 0, s, afp);
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(argv[1], argv[2], s, afp);
argc -= 2, argv += 2;
} else if (p->c_u.c_func)
p->c_u.c_func(*argv, p->c_parameter, s, afp);
argc--, argv++;
}
/*
* Do any post argument processing required by the address family.
*/
if (afp->af_postproc != NULL)
afp->af_postproc(s, afp);
/*
* Do deferred callbacks registered while processing
* command-line arguments.
*/
for (cb = callbacks; cb != NULL; cb = cb->cb_next)
cb->cb_func(s, cb->cb_arg);
/*
* Do deferred operations.
*/
if (clearaddr) {
if (afp->af_ridreq == NULL || afp->af_difaddr == 0) {
warnx("interface %s cannot change %s addresses!",
name, afp->af_name);
clearaddr = 0;
}
}
if (clearaddr) {
int ret;
strlcpy(((struct ifreq *)afp->af_ridreq)->ifr_name, name,
sizeof ifr.ifr_name);
ret = ioctl(s, afp->af_difaddr, afp->af_ridreq);
if (ret < 0) {
if (errno == EADDRNOTAVAIL && (doalias >= 0)) {
/* means no previous address for interface */
} else
Perror("ioctl (SIOCDIFADDR)");
}
}
if (newaddr) {
if (afp->af_addreq == NULL || afp->af_aifaddr == 0) {
warnx("interface %s cannot change %s addresses!",
name, afp->af_name);
newaddr = 0;
}
}
if (newaddr && (setaddr || setmask)) {
strlcpy(((struct ifreq *)afp->af_addreq)->ifr_name, name,
sizeof ifr.ifr_name);
if (ioctl(s, afp->af_aifaddr, afp->af_addreq) < 0)
Perror("ioctl (SIOCAIFADDR)");
}
close(s);
return(0);
}
/*ARGSUSED*/
static void
setifaddr(const char *addr, int param, int s, const struct afswtch *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(const char *src, const char *dst, int s, const struct afswtch *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(s, srcres, dstres);
freeaddrinfo(srcres);
freeaddrinfo(dstres);
}
/* ARGSUSED */
static void
deletetunnel(const char *vname, int param, int s, const struct afswtch *afp)
{
if (ioctl(s, SIOCDIFPHYADDR, &ifr) < 0)
err(1, "SIOCDIFPHYADDR");
}
#ifdef JAIL
static void
setifvnet(const char *jname, int dummy __unused, int s,
const struct afswtch *afp)
{
struct ifreq my_ifr;
memcpy(&my_ifr, &ifr, sizeof(my_ifr));
my_ifr.ifr_jid = jail_getid(jname);
if (my_ifr.ifr_jid < 0)
errx(1, "%s", jail_errmsg);
if (ioctl(s, SIOCSIFVNET, &my_ifr) < 0)
err(1, "SIOCSIFVNET");
}
static void
setifrvnet(const char *jname, int dummy __unused, int s,
const struct afswtch *afp)
{
struct ifreq my_ifr;
memcpy(&my_ifr, &ifr, sizeof(my_ifr));
my_ifr.ifr_jid = jail_getid(jname);
if (my_ifr.ifr_jid < 0)
errx(1, "%s", jail_errmsg);
if (ioctl(s, SIOCSIFRVNET, &my_ifr) < 0)
err(1, "SIOCSIFRVNET(%d, %s)", my_ifr.ifr_jid, my_ifr.ifr_name);
}
#endif
static void
setifnetmask(const char *addr, int dummy __unused, int s,
const struct afswtch *afp)
{
if (afp->af_getaddr != NULL) {
setmask++;
afp->af_getaddr(addr, MASK);
}
}
static void
setifbroadaddr(const char *addr, int dummy __unused, int s,
const struct afswtch *afp)
{
if (afp->af_getaddr != NULL)
afp->af_getaddr(addr, DSTADDR);
}
static void
notealias(const char *addr, int param, int s, const struct afswtch *afp)
{
#define rqtosa(x) (&(((struct ifreq *)(afp->x))->ifr_addr))
if (setaddr && doalias == 0 && param < 0)
if (afp->af_addreq != NULL && afp->af_ridreq != NULL)
bcopy((caddr_t)rqtosa(af_addreq),
(caddr_t)rqtosa(af_ridreq),
rqtosa(af_addreq)->sa_len);
doalias = param;
if (param < 0) {
clearaddr = 1;
newaddr = 0;
} else
clearaddr = 0;
#undef rqtosa
}
/*ARGSUSED*/
static void
setifdstaddr(const char *addr, int param __unused, int s,
const struct afswtch *afp)
{
if (afp->af_getaddr != NULL)
afp->af_getaddr(addr, DSTADDR);
}
/*
* 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
setifflags(const char *vname, int value, int s, const struct afswtch *afp)
{
struct ifreq my_ifr;
int flags;
memset(&my_ifr, 0, sizeof(my_ifr));
(void) strlcpy(my_ifr.ifr_name, name, sizeof(my_ifr.ifr_name));
if (ioctl(s, SIOCGIFFLAGS, (caddr_t)&my_ifr) < 0) {
Perror("ioctl (SIOCGIFFLAGS)");
exit(1);
}
flags = (my_ifr.ifr_flags & 0xffff) | (my_ifr.ifr_flagshigh << 16);
if (value < 0) {
value = -value;
flags &= ~value;
} else
flags |= value;
my_ifr.ifr_flags = flags & 0xffff;
my_ifr.ifr_flagshigh = flags >> 16;
if (ioctl(s, SIOCSIFFLAGS, (caddr_t)&my_ifr) < 0)
Perror(vname);
}
void
setifcap(const char *vname, int value, int s, const struct afswtch *afp)
{
int flags;
if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) < 0) {
Perror("ioctl (SIOCGIFCAP)");
exit(1);
}
flags = ifr.ifr_curcap;
if (value < 0) {
value = -value;
flags &= ~value;
} else
flags |= value;
flags &= ifr.ifr_reqcap;
ifr.ifr_reqcap = flags;
if (ioctl(s, SIOCSIFCAP, (caddr_t)&ifr) < 0)
Perror(vname);
}
static void
setifmetric(const char *val, int dummy __unused, int s,
const struct afswtch *afp)
{
strlcpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
ifr.ifr_metric = atoi(val);
if (ioctl(s, SIOCSIFMETRIC, (caddr_t)&ifr) < 0)
err(1, "ioctl SIOCSIFMETRIC (set metric)");
}
static void
setifmtu(const char *val, int dummy __unused, int s,
const struct afswtch *afp)
{
strlcpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
ifr.ifr_mtu = atoi(val);
if (ioctl(s, SIOCSIFMTU, (caddr_t)&ifr) < 0)
err(1, "ioctl SIOCSIFMTU (set mtu)");
}
static void
setifpcp(const char *val, int arg __unused, int s, const struct afswtch *afp)
{
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(s, SIOCSLANPCP, (caddr_t)&ifr) == -1)
err(1, "SIOCSLANPCP");
}
static void
disableifpcp(const char *val, int arg __unused, int s,
const struct afswtch *afp)
{
ifr.ifr_lan_pcp = IFNET_PCP_NONE;
if (ioctl(s, SIOCSLANPCP, (caddr_t)&ifr) == -1)
err(1, "SIOCSLANPCP");
}
static void
setifname(const char *val, int dummy __unused, int s,
const struct afswtch *afp)
{
char *newname;
strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
newname = strdup(val);
if (newname == NULL)
err(1, "no memory to set ifname");
ifr.ifr_data = newname;
if (ioctl(s, SIOCSIFNAME, (caddr_t)&ifr) < 0) {
free(newname);
err(1, "ioctl SIOCSIFNAME (set name)");
}
printifname = 1;
strlcpy(name, newname, sizeof(name));
free(newname);
}
/* ARGSUSED */
static void
setifdescr(const char *val, int dummy __unused, int s,
const struct afswtch *afp)
{
char *newdescr;
strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
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(s, SIOCSIFDESCR, (caddr_t)&ifr) < 0)
err(1, "ioctl SIOCSIFDESCR (set descr)");
free(newdescr);
}
/* ARGSUSED */
static void
unsetifdescr(const char *val, int value, int s, const struct afswtch *afp)
{
setifdescr("", 0, s, 0);
}
#define IFFBITS \
"\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT\7RUNNING" \
"\10NOARP\11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX\15LINK0\16LINK1\17LINK2" \
"\20MULTICAST\22PPROMISC\23MONITOR\24STATICARP"
#define IFCAPBITS \
"\020\1RXCSUM\2TXCSUM\3NETCONS\4VLAN_MTU\5VLAN_HWTAGGING\6JUMBO_MTU\7POLLING" \
"\10VLAN_HWCSUM\11TSO4\12TSO6\13LRO\14WOL_UCAST\15WOL_MCAST\16WOL_MAGIC" \
"\17TOE4\20TOE6\21VLAN_HWFILTER\23VLAN_HWTSO\24LINKSTATE\25NETMAP" \
"\26RXCSUM_IPV6\27TXCSUM_IPV6\31TXRTLMT\32HWRXTSTMP"
/*
* Print the status of the interface. If an address family was
* specified, show only it; otherwise, show them all.
*/
static void
status(const struct afswtch *afp, const struct sockaddr_dl *sdl,
struct ifaddrs *ifa)
{
struct ifaddrs *ift;
int allfamilies, s;
struct ifstat ifs;
if (afp == NULL) {
allfamilies = 1;
ifr.ifr_addr.sa_family = AF_LOCAL;
} else {
allfamilies = 0;
ifr.ifr_addr.sa_family =
afp->af_af == AF_LINK ? AF_LOCAL : afp->af_af;
}
strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
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);
printf("%s: ", name);
printb("flags", ifa->ifa_flags, IFFBITS);
if (ioctl(s, SIOCGIFMETRIC, &ifr) != -1)
printf(" metric %d", ifr.ifr_metric);
if (ioctl(s, SIOCGIFMTU, &ifr) != -1)
printf(" mtu %d", ifr.ifr_mtu);
putchar('\n');
for (;;) {
if ((descr = reallocf(descr, descrlen)) != NULL) {
ifr.ifr_buffer.buffer = descr;
ifr.ifr_buffer.length = descrlen;
if (ioctl(s, 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;
}
if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) == 0) {
if (ifr.ifr_curcap != 0) {
printb("\toptions", ifr.ifr_curcap, IFCAPBITS);
putchar('\n');
}
if (supmedia && ifr.ifr_reqcap != 0) {
printb("\tcapabilities", ifr.ifr_reqcap, IFCAPBITS);
putchar('\n');
}
}
tunnel_status(s);
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(s, ift);
} else if (afp->af_af == ift->ifa_addr->sa_family)
afp->af_status(s, 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(s);
else if (afp->af_other_status != NULL)
afp->af_other_status(s);
strlcpy(ifs.ifs_name, name, sizeof ifs.ifs_name);
if (ioctl(s, SIOCGIFSTATUS, &ifs) == 0)
printf("%s", ifs.ascii);
if (verbose > 0)
sfp_status(s, &ifr, verbose);
close(s);
return;
}
static void
tunnel_status(int s)
{
af_all_tunnel_status(s);
}
void
Perror(const char *cmd)
{
switch (errno) {
case ENXIO:
errx(1, "%s: no such interface", cmd);
break;
case EPERM:
errx(1, "%s: permission denied", cmd);
break;
default:
err(1, "%s", cmd);
}
}
/*
* 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 & (1 << (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, const char *s)
{
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(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;
/* loading suppressed by the user */
if (noload)
return;
/* trim the interface number off the end */
strlcpy(ifname, name, sizeof(ifname));
for (dp = ifname; *dp != 0; dp++)
if (isdigit(*dp)) {
*dp = 0;
break;
}
/* 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;
}
/* already loaded? */
if (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, setifflags),
DEF_CMD("arp", -IFF_NOARP, setifflags),
DEF_CMD("-arp", IFF_NOARP, setifflags),
DEF_CMD("debug", IFF_DEBUG, setifflags),
DEF_CMD("-debug", -IFF_DEBUG, setifflags),
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, setifflags),
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, setifflags),
#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, setifflags),
DEF_CMD("link1", IFF_LINK1, setifflags),
DEF_CMD("-link1", -IFF_LINK1, setifflags),
DEF_CMD("link2", IFF_LINK2, setifflags),
DEF_CMD("-link2", -IFF_LINK2, setifflags),
DEF_CMD("monitor", IFF_MONITOR, setifflags),
DEF_CMD("-monitor", -IFF_MONITOR, setifflags),
DEF_CMD("staticarp", IFF_STATICARP, setifflags),
DEF_CMD("-staticarp", -IFF_STATICARP, setifflags),
DEF_CMD("rxcsum6", IFCAP_RXCSUM_IPV6, setifcap),
DEF_CMD("-rxcsum6", -IFCAP_RXCSUM_IPV6, setifcap),
DEF_CMD("txcsum6", IFCAP_TXCSUM_IPV6, setifcap),
DEF_CMD("-txcsum6", -IFCAP_TXCSUM_IPV6, setifcap),
DEF_CMD("rxcsum", IFCAP_RXCSUM, setifcap),
DEF_CMD("-rxcsum", -IFCAP_RXCSUM, setifcap),
DEF_CMD("txcsum", IFCAP_TXCSUM, setifcap),
DEF_CMD("-txcsum", -IFCAP_TXCSUM, setifcap),
DEF_CMD("netcons", IFCAP_NETCONS, setifcap),
DEF_CMD("-netcons", -IFCAP_NETCONS, setifcap),
DEF_CMD_ARG("pcp", setifpcp),
DEF_CMD("-pcp", 0, disableifpcp),
DEF_CMD("polling", IFCAP_POLLING, setifcap),
DEF_CMD("-polling", -IFCAP_POLLING, setifcap),
DEF_CMD("tso6", IFCAP_TSO6, setifcap),
DEF_CMD("-tso6", -IFCAP_TSO6, setifcap),
DEF_CMD("tso4", IFCAP_TSO4, setifcap),
DEF_CMD("-tso4", -IFCAP_TSO4, setifcap),
DEF_CMD("tso", IFCAP_TSO, setifcap),
DEF_CMD("-tso", -IFCAP_TSO, setifcap),
DEF_CMD("toe", IFCAP_TOE, setifcap),
DEF_CMD("-toe", -IFCAP_TOE, setifcap),
DEF_CMD("lro", IFCAP_LRO, setifcap),
DEF_CMD("-lro", -IFCAP_LRO, setifcap),
DEF_CMD("wol", IFCAP_WOL, setifcap),
DEF_CMD("-wol", -IFCAP_WOL, setifcap),
DEF_CMD("wol_ucast", IFCAP_WOL_UCAST, setifcap),
DEF_CMD("-wol_ucast", -IFCAP_WOL_UCAST, setifcap),
DEF_CMD("wol_mcast", IFCAP_WOL_MCAST, setifcap),
DEF_CMD("-wol_mcast", -IFCAP_WOL_MCAST, setifcap),
DEF_CMD("wol_magic", IFCAP_WOL_MAGIC, setifcap),
DEF_CMD("-wol_magic", -IFCAP_WOL_MAGIC, setifcap),
DEF_CMD("txrtlmt", IFCAP_TXRTLMT, setifcap),
DEF_CMD("-txrtlmt", -IFCAP_TXRTLMT, setifcap),
DEF_CMD("hwrxtstmp", IFCAP_HWRXTSTMP, setifcap),
DEF_CMD("-hwrxtstmp", -IFCAP_HWRXTSTMP, setifcap),
DEF_CMD("normal", -IFF_LINK0, setifflags),
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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