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📄 Makefile.in(1.77 KB)
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📄 base64.c(10.25 KB)
📄 base64.h(2.69 KB)
📄 basename.c(1.78 KB)
📄 bcrypt_pbkdf.c(5.38 KB)
📄 bindresvport.c(3.24 KB)
📄 blf.h(3.49 KB)
📄 blowfish.c(23.11 KB)
📄 bsd-asprintf.c(2.31 KB)
📄 bsd-closefrom.c(2.84 KB)
📄 bsd-cygwin_util.c(3.15 KB)
📄 bsd-cygwin_util.h(2.34 KB)
📄 bsd-err.c(2.15 KB)
📄 bsd-flock.c(2.23 KB)
📄 bsd-getline.c(2.9 KB)
📄 bsd-getpagesize.c(463 B)
📄 bsd-getpeereid.c(1.68 KB)
📄 bsd-malloc.c(1.4 KB)
📄 bsd-misc.c(5.88 KB)
📄 bsd-misc.h(3.61 KB)
📄 bsd-nextstep.c(2.5 KB)
📄 bsd-nextstep.h(2.22 KB)
📄 bsd-openpty.c(4.92 KB)
📄 bsd-poll.c(2.91 KB)
📄 bsd-poll.h(2.06 KB)
📄 bsd-setres_id.c(2.34 KB)
📄 bsd-setres_id.h(930 B)
📄 bsd-signal.c(1.55 KB)
📄 bsd-signal.h(1.15 KB)
📄 bsd-snprintf.c(20.58 KB)
📄 bsd-statvfs.c(2.09 KB)
📄 bsd-statvfs.h(2.24 KB)
📄 bsd-waitpid.c(1.77 KB)
📄 bsd-waitpid.h(2.02 KB)
📄 chacha_private.h(5.26 KB)
📄 charclass.h(702 B)
📄 daemon.c(2.32 KB)
📄 dirname.c(1.87 KB)
📄 explicit_bzero.c(1.09 KB)
📄 fake-rfc2553.c(6.15 KB)
📄 fake-rfc2553.h(5.2 KB)
📄 fmt_scaled.c(7.69 KB)
📄 freezero.c(1.01 KB)
📄 getcwd.c(5.95 KB)
📄 getgrouplist.c(2.7 KB)
📄 getopt.h(2.71 KB)
📄 getopt_long.c(14.46 KB)
📄 getrrsetbyname-ldns.c(7.81 KB)
📄 getrrsetbyname.c(13.56 KB)
📄 getrrsetbyname.h(3.62 KB)
📄 glob.c(25.53 KB)
📄 glob.h(4.54 KB)
📄 inet_aton.c(5.23 KB)
📄 inet_ntoa.c(2.21 KB)
📄 inet_ntop.c(5.42 KB)
📄 kludge-fd_set.c(882 B)
📄 libressl-api-compat.c(16.19 KB)
📄 md5.c(7.83 KB)
📄 md5.h(1.85 KB)
📄 mktemp.c(3.14 KB)
📄 openbsd-compat.h(8.68 KB)
📄 openssl-compat.c(2.43 KB)
📄 openssl-compat.h(7.22 KB)
📄 port-aix.c(12.61 KB)
📄 port-aix.h(4.22 KB)
📄 port-irix.c(2.94 KB)
📄 port-irix.h(1.65 KB)
📄 port-linux.c(7.66 KB)
📄 port-linux.h(1.18 KB)
📄 port-net.c(8.33 KB)
📄 port-net.h(1.58 KB)
📄 port-solaris.c(9.56 KB)
📄 port-solaris.h(1.27 KB)
📄 port-uw.c(4.16 KB)
📄 port-uw.h(1.37 KB)
📄 pwcache.c(3.22 KB)
📄 readpassphrase.c(5.79 KB)
📄 readpassphrase.h(1.75 KB)
📄 reallocarray.c(1.49 KB)
📄 realpath.c(6.08 KB)
📄 recallocarray.c(2.4 KB)
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📄 rmd160.c(11.72 KB)
📄 rmd160.h(2.81 KB)
📄 rresvport.c(2.97 KB)
📄 setenv.c(5.76 KB)
📄 setproctitle.c(4.55 KB)
📄 sha1.c(5.18 KB)
📄 sha1.h(2.23 KB)
📄 sha2.c(24.88 KB)
📄 sha2.h(5.66 KB)
📄 sigact.c(3.82 KB)
📄 sigact.h(3.66 KB)
📄 strcasestr.c(2.35 KB)
📄 strlcat.c(1.76 KB)
📄 strlcpy.c(1.64 KB)
📄 strmode.c(3.38 KB)
📄 strndup.c(1.27 KB)
📄 strnlen.c(1.18 KB)
📄 strptime.c(9.28 KB)
📄 strsep.c(2.59 KB)
📄 strtoll.c(4.29 KB)
📄 strtonum.c(1.85 KB)
📄 strtoul.c(3.07 KB)
📄 strtoull.c(3.13 KB)
📄 sys-queue.h(21.04 KB)
📄 sys-tree.h(24.68 KB)
📄 timingsafe_bcmp.c(1.17 KB)
📄 vis.c(5.97 KB)
📄 vis.h(3.57 KB)
📄 xcrypt.c(4.26 KB)

Editing: port-net.c

/*
 * Copyright (c) 2005 Reyk Floeter <reyk@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include "includes.h"

#include <sys/types.h>
#include <sys/ioctl.h>

#include <netinet/in.h>
#include <arpa/inet.h>
#include <netinet/ip.h>

#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <string.h>
#include <unistd.h>

#include "openbsd-compat/sys-queue.h"
#include "log.h"
#include "misc.h"
#include "sshbuf.h"
#include "channels.h"
#include "ssherr.h"

/*
 * This file contains various portability code for network support,
 * including tun/tap forwarding and routing domains.
 */

#if defined(SYS_RDOMAIN_LINUX) || defined(SSH_TUN_LINUX)
#include <linux/if.h>
#endif

#if defined(SYS_RDOMAIN_LINUX)
char *
sys_get_rdomain(int fd)
{
	char dev[IFNAMSIZ + 1];
	socklen_t len = sizeof(dev) - 1;

if (getsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, dev, &len) == -1) {
		error("%s: cannot determine VRF for fd=%d : %s",
		    __func__, fd, strerror(errno));
		return NULL;
	}
	dev[len] = '\0';
	return strdup(dev);
}

int
sys_set_rdomain(int fd, const char *name)
{
	if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE,
	    name, strlen(name)) == -1) {
		error("%s: setsockopt(%d, SO_BINDTODEVICE, %s): %s",
		      __func__, fd, name, strerror(errno));
		return -1;
	}
	return 0;
}

int
sys_valid_rdomain(const char *name)
{
	int fd;

/*
	 * This is a pretty crappy way to test. It would be better to
	 * check whether "name" represents a VRF device, but apparently
	 * that requires an rtnetlink transaction.
	 */
	if ((fd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
		return 0;
	if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE,
	    name, strlen(name)) == -1) {
		close(fd);
		return 0;
	}
	close(fd);
	return 1;
}
#elif defined(SYS_RDOMAIN_XXX)
/* XXX examples */
char *
sys_get_rdomain(int fd)
{
	return NULL;
}

int
sys_set_rdomain(int fd, const char *name)
{
	return -1;
}

int
valid_rdomain(const char *name)
{
	return 0;
}

void
sys_set_process_rdomain(const char *name)
{
	fatal("%s: not supported", __func__);
}
#endif /* defined(SYS_RDOMAIN_XXX) */

/*
 * This is the portable version of the SSH tunnel forwarding, it
 * uses some preprocessor definitions for various platform-specific
 * settings.
 *
 * SSH_TUN_LINUX	Use the (newer) Linux tun/tap device
 * SSH_TUN_FREEBSD	Use the FreeBSD tun/tap device
 * SSH_TUN_COMPAT_AF	Translate the OpenBSD address family
 * SSH_TUN_PREPEND_AF	Prepend/remove the address family
 */

/*
 * System-specific tunnel open function
 */

#if defined(SSH_TUN_LINUX)
#include <linux/if_tun.h>

int
sys_tun_open(int tun, int mode, char **ifname)
{
	struct ifreq ifr;
	int fd = -1;
	const char *name = NULL;

if (ifname != NULL)
		*ifname = NULL;

if ((fd = open("/dev/net/tun", O_RDWR)) == -1) {
		debug("%s: failed to open tunnel control interface: %s",
		    __func__, strerror(errno));
		return (-1);
	}

bzero(&ifr, sizeof(ifr));

if (mode == SSH_TUNMODE_ETHERNET) {
		ifr.ifr_flags = IFF_TAP;
		name = "tap%d";
	} else {
		ifr.ifr_flags = IFF_TUN;
		name = "tun%d";
	}
	ifr.ifr_flags |= IFF_NO_PI;

if (tun != SSH_TUNID_ANY) {
		if (tun > SSH_TUNID_MAX) {
			debug("%s: invalid tunnel id %x: %s", __func__,
			    tun, strerror(errno));
			goto failed;
		}
		snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), name, tun);
	}

if (ioctl(fd, TUNSETIFF, &ifr) == -1) {
		debug("%s: failed to configure tunnel (mode %d): %s", __func__,
		    mode, strerror(errno));
		goto failed;
	}

if (tun == SSH_TUNID_ANY)
		debug("%s: tunnel mode %d fd %d", __func__, mode, fd);
	else
		debug("%s: %s mode %d fd %d", __func__, ifr.ifr_name, mode, fd);

if (ifname != NULL && (*ifname = strdup(ifr.ifr_name)) == NULL)
		goto failed;

return (fd);

failed:
	close(fd);
	return (-1);
}
#endif /* SSH_TUN_LINUX */

#ifdef SSH_TUN_FREEBSD
#include <sys/socket.h>
#include <net/if.h>

#ifdef HAVE_NET_IF_TUN_H
#include <net/if_tun.h>
#endif

int
sys_tun_open(int tun, int mode, char **ifname)
{
	struct ifreq ifr;
	char name[100];
	int fd = -1, sock, flag;
	const char *tunbase = "tun";

if (ifname != NULL)
		*ifname = NULL;

if (mode == SSH_TUNMODE_ETHERNET) {
#ifdef SSH_TUN_NO_L2
		debug("%s: no layer 2 tunnelling support", __func__);
		return (-1);
#else
		tunbase = "tap";
#endif
	}

/* Open the tunnel device */
	if (tun <= SSH_TUNID_MAX) {
		snprintf(name, sizeof(name), "/dev/%s%d", tunbase, tun);
		fd = open(name, O_RDWR);
	} else if (tun == SSH_TUNID_ANY) {
		for (tun = 100; tun >= 0; tun--) {
			snprintf(name, sizeof(name), "/dev/%s%d",
			    tunbase, tun);
			if ((fd = open(name, O_RDWR)) >= 0)
				break;
		}
	} else {
		debug("%s: invalid tunnel %u\n", __func__, tun);
		return (-1);
	}

if (fd < 0) {
		debug("%s: %s open failed: %s", __func__, name,
		    strerror(errno));
		return (-1);
	}

/* Turn on tunnel headers */
	flag = 1;
#if defined(TUNSIFHEAD) && !defined(SSH_TUN_PREPEND_AF)
	if (mode != SSH_TUNMODE_ETHERNET &&
	    ioctl(fd, TUNSIFHEAD, &flag) == -1) {
		debug("%s: ioctl(%d, TUNSIFHEAD, 1): %s", __func__, fd,
		    strerror(errno));
		close(fd);
	}
#endif

debug("%s: %s mode %d fd %d", __func__, name, mode, fd);

/* Set the tunnel device operation mode */
	snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "%s%d", tunbase, tun);
	if ((sock = socket(PF_UNIX, SOCK_STREAM, 0)) == -1)
		goto failed;

if (ioctl(sock, SIOCGIFFLAGS, &ifr) == -1)
		goto failed;
	if ((ifr.ifr_flags & IFF_UP) == 0) {
		ifr.ifr_flags |= IFF_UP;
		if (ioctl(sock, SIOCSIFFLAGS, &ifr) == -1)
			goto failed;
	}

if (ifname != NULL && (*ifname = strdup(ifr.ifr_name)) == NULL)
		goto failed;

close(sock);
	return (fd);

failed:
	if (fd >= 0)
		close(fd);
	if (sock >= 0)
		close(sock);
	debug("%s: failed to set %s mode %d: %s", __func__, name,
	    mode, strerror(errno));
	return (-1);
}
#endif /* SSH_TUN_FREEBSD */

/*
 * System-specific channel filters
 */

#if defined(SSH_TUN_FILTER)
/*
 * The tunnel forwarding protocol prepends the address family of forwarded
 * IP packets using OpenBSD's numbers.
 */
#define OPENBSD_AF_INET		2
#define OPENBSD_AF_INET6	24

int
sys_tun_infilter(struct ssh *ssh, struct Channel *c, char *buf, int _len)
{
	int r;
	size_t len;
	char *ptr = buf;
#if defined(SSH_TUN_PREPEND_AF)
	char rbuf[CHAN_RBUF];
	struct ip iph;
#endif
#if defined(SSH_TUN_PREPEND_AF) || defined(SSH_TUN_COMPAT_AF)
	u_int32_t af;
#endif

/* XXX update channel input filter API to use unsigned length */
	if (_len < 0)
		return -1;
	len = _len;

#if defined(SSH_TUN_PREPEND_AF)
	if (len <= sizeof(iph) || len > sizeof(rbuf) - 4)
		return -1;
	/* Determine address family from packet IP header. */
	memcpy(&iph, buf, sizeof(iph));
	af = iph.ip_v == 6 ? OPENBSD_AF_INET6 : OPENBSD_AF_INET;
	/* Prepend address family to packet using OpenBSD constants */
	memcpy(rbuf + 4, buf, len);
	len += 4;
	POKE_U32(rbuf, af);
	ptr = rbuf;
#elif defined(SSH_TUN_COMPAT_AF)
	/* Convert existing address family header to OpenBSD value */
	if (len <= 4)
		return -1;
	af = PEEK_U32(buf);
	/* Put it back */
	POKE_U32(buf, af == AF_INET6 ? OPENBSD_AF_INET6 : OPENBSD_AF_INET);
#endif

if ((r = sshbuf_put_string(c->input, ptr, len)) != 0)
		fatal("%s: buffer error: %s", __func__, ssh_err(r));
	return (0);
}

u_char *
sys_tun_outfilter(struct ssh *ssh, struct Channel *c,
    u_char **data, size_t *dlen)
{
	u_char *buf;
	u_int32_t af;
	int r;

/* XXX new API is incompatible with this signature. */
	if ((r = sshbuf_get_string(c->output, data, dlen)) != 0)
		fatal("%s: buffer error: %s", __func__, ssh_err(r));
	if (*dlen < sizeof(af))
		return (NULL);
	buf = *data;

#if defined(SSH_TUN_PREPEND_AF)
	/* skip address family */
	*dlen -= sizeof(af);
	buf = *data + sizeof(af);
#elif defined(SSH_TUN_COMPAT_AF)
	/* translate address family */
	af = (PEEK_U32(buf) == OPENBSD_AF_INET6) ? AF_INET6 : AF_INET;
	POKE_U32(buf, af);
#endif
	return (buf);
}
#endif /* SSH_TUN_FILTER */

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Editing: port-net.c

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