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freebsd-skq/sbin/ifconfig/ifconfig.c
imp 7e6cabd06e Renumber copyright clause 4 
Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is too pedantic, so give up on that point.

Submitted by:	Jan Schaumann <jschauma@stevens.edu>
Pull Request:	https://github.com/freebsd/freebsd/pull/96
2017-02-28 23:42:47 +00:00

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/*
* 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. */
/* 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 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(0);
}
#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(0);
}
#endif
errx(1, "interface %s does not exist", ifname);
}
}
/* 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(0);
}
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_u.c_func || p->c_u.c_func2) {
if (p->c_parameter == NEXTARG) {
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(argv[1], 0, s, afp);
if (argv[1] != NULL)
argc--, argv++;
} else if (p->c_parameter == NEXTARG2) {
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
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
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"
/*
* 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);
bits++;
if (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;
}
}
/* not present, we should try to load it */
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("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("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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