1 files changed, 0 insertions, 374 deletions
diff --git a/crypto/openssh/canohost.c b/crypto/openssh/canohost.c
deleted file mode 100644
index 941db23b64bf1..0000000000000
--- a/crypto/openssh/canohost.c
+++ /dev/null
@@ -1,374 +0,0 @@
-/*
- * Author: Tatu Ylonen <ylo@cs.hut.fi>
- * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
- *                    All rights reserved
- * Functions for returning the canonical host name of the remote site.
- *
- * As far as I am concerned, the code I have written for this software
- * can be used freely for any purpose.  Any derived versions of this
- * software must be clearly marked as such, and if the derived work is
- * incompatible with the protocol description in the RFC file, it must be
- * called by a name other than "ssh" or "Secure Shell".
- */
-
-#include "includes.h"
-RCSID("$OpenBSD: canohost.c,v 1.35 2002/11/26 02:38:54 stevesk Exp $");
-
-#include "packet.h"
-#include "xmalloc.h"
-#include "log.h"
-#include "canohost.h"
-
-static void check_ip_options(int, char *);
-
-/*
- * Return the canonical name of the host at the other end of the socket. The
- * caller should free the returned string with xfree.
- */
-
-static char *
-get_remote_hostname(int socket, int verify_reverse_mapping)
-{
-	struct sockaddr_storage from;
-	int i;
-	socklen_t fromlen;
-	struct addrinfo hints, *ai, *aitop;
-	char name[NI_MAXHOST], ntop[NI_MAXHOST], ntop2[NI_MAXHOST];
-
-	/* Get IP address of client. */
-	fromlen = sizeof(from);
-	memset(&from, 0, sizeof(from));
-	if (getpeername(socket, (struct sockaddr *)&from, &fromlen) < 0) {
-		debug("getpeername failed: %.100s", strerror(errno));
-		fatal_cleanup();
-	}
-#ifdef IPV4_IN_IPV6
-	if (from.ss_family == AF_INET6) {
-		struct sockaddr_in6 *from6 = (struct sockaddr_in6 *)&from;
-
-		/* Detect IPv4 in IPv6 mapped address and convert it to */
-		/* plain (AF_INET) IPv4 address */
-		if (IN6_IS_ADDR_V4MAPPED(&from6->sin6_addr)) {
-			struct sockaddr_in *from4 = (struct sockaddr_in *)&from;
-			struct in_addr addr;
-			u_int16_t port;
-
-			memcpy(&addr, ((char *)&from6->sin6_addr) + 12, sizeof(addr));
-			port = from6->sin6_port;
-
-			memset(&from, 0, sizeof(from));
-
-			from4->sin_family = AF_INET;
-			fromlen = sizeof(*from4);
-			memcpy(&from4->sin_addr, &addr, sizeof(addr));
-			from4->sin_port = port;
-		}
-	}
-#endif
-	if (from.ss_family == AF_INET6)
-		fromlen = sizeof(struct sockaddr_in6);
-
-	if (getnameinfo((struct sockaddr *)&from, fromlen, ntop, sizeof(ntop),
-	    NULL, 0, NI_NUMERICHOST) != 0)
-		fatal("get_remote_hostname: getnameinfo NI_NUMERICHOST failed");
-
-	if (from.ss_family == AF_INET)
-		check_ip_options(socket, ntop);
-
-	debug3("Trying to reverse map address %.100s.", ntop);
-	/* Map the IP address to a host name. */
-	if (getnameinfo((struct sockaddr *)&from, fromlen, name, sizeof(name),
-	    NULL, 0, NI_NAMEREQD) != 0) {
-		/* Host name not found.  Use ip address. */
-#if 0
-		log("Could not reverse map address %.100s.", ntop);
-#endif
-		return xstrdup(ntop);
-	}
-
-	/* Got host name. */
-	name[sizeof(name) - 1] = '\0';
-	/*
-	 * Convert it to all lowercase (which is expected by the rest
-	 * of this software).
-	 */
-	for (i = 0; name[i]; i++)
-		if (isupper(name[i]))
-			name[i] = tolower(name[i]);
-
-	if (!verify_reverse_mapping)
-		return xstrdup(name);
-	/*
-	 * Map it back to an IP address and check that the given
-	 * address actually is an address of this host.  This is
-	 * necessary because anyone with access to a name server can
-	 * define arbitrary names for an IP address. Mapping from
-	 * name to IP address can be trusted better (but can still be
-	 * fooled if the intruder has access to the name server of
-	 * the domain).
-	 */
-	memset(&hints, 0, sizeof(hints));
-	hints.ai_family = from.ss_family;
-	hints.ai_socktype = SOCK_STREAM;
-	if (getaddrinfo(name, NULL, &hints, &aitop) != 0) {
-		log("reverse mapping checking getaddrinfo for %.700s "
-		    "failed - POSSIBLE BREAKIN ATTEMPT!", name);
-		return xstrdup(ntop);
-	}
-	/* Look for the address from the list of addresses. */
-	for (ai = aitop; ai; ai = ai->ai_next) {
-		if (getnameinfo(ai->ai_addr, ai->ai_addrlen, ntop2,
-		    sizeof(ntop2), NULL, 0, NI_NUMERICHOST) == 0 &&
-		    (strcmp(ntop, ntop2) == 0))
-				break;
-	}
-	freeaddrinfo(aitop);
-	/* If we reached the end of the list, the address was not there. */
-	if (!ai) {
-		/* Address not found for the host name. */
-		log("Address %.100s maps to %.600s, but this does not "
-		    "map back to the address - POSSIBLE BREAKIN ATTEMPT!",
-		    ntop, name);
-		return xstrdup(ntop);
-	}
-	return xstrdup(name);
-}
-
-/*
- * If IP options are supported, make sure there are none (log and
- * disconnect them if any are found).  Basically we are worried about
- * source routing; it can be used to pretend you are somebody
- * (ip-address) you are not. That itself may be "almost acceptable"
- * under certain circumstances, but rhosts autentication is useless
- * if source routing is accepted. Notice also that if we just dropped
- * source routing here, the other side could use IP spoofing to do
- * rest of the interaction and could still bypass security.  So we
- * exit here if we detect any IP options.
- */
-/* IPv4 only */
-static void
-check_ip_options(int socket, char *ipaddr)
-{
-	u_char options[200];
-	char text[sizeof(options) * 3 + 1];
-	socklen_t option_size;
-	int i, ipproto;
-	struct protoent *ip;
-
-	if ((ip = getprotobyname("ip")) != NULL)
-		ipproto = ip->p_proto;
-	else
-		ipproto = IPPROTO_IP;
-	option_size = sizeof(options);
-	if (getsockopt(socket, ipproto, IP_OPTIONS, options,
-	    &option_size) >= 0 && option_size != 0) {
-		text[0] = '\0';
-		for (i = 0; i < option_size; i++)
-			snprintf(text + i*3, sizeof(text) - i*3,
-			    " %2.2x", options[i]);
-		log("Connection from %.100s with IP options:%.800s",
-		    ipaddr, text);
-		packet_disconnect("Connection from %.100s with IP options:%.800s",
-		    ipaddr, text);
-	}
-}
-
-/*
- * Return the canonical name of the host in the other side of the current
- * connection.  The host name is cached, so it is efficient to call this
- * several times.
- */
-
-const char *
-get_canonical_hostname(int verify_reverse_mapping)
-{
-	static char *canonical_host_name = NULL;
-	static int verify_reverse_mapping_done = 0;
-
-	/* Check if we have previously retrieved name with same option. */
-	if (canonical_host_name != NULL) {
-		if (verify_reverse_mapping_done != verify_reverse_mapping)
-			xfree(canonical_host_name);
-		else
-			return canonical_host_name;
-	}
-
-	/* Get the real hostname if socket; otherwise return UNKNOWN. */
-	if (packet_connection_is_on_socket())
-		canonical_host_name = get_remote_hostname(
-		    packet_get_connection_in(), verify_reverse_mapping);
-	else
-		canonical_host_name = xstrdup("UNKNOWN");
-
-	verify_reverse_mapping_done = verify_reverse_mapping;
-	return canonical_host_name;
-}
-
-/*
- * Returns the local/remote IP-address/hostname of socket as a string.
- * The returned string must be freed.
- */
-static char *
-get_socket_address(int socket, int remote, int flags)
-{
-	struct sockaddr_storage addr;
-	socklen_t addrlen;
-	char ntop[NI_MAXHOST];
-
-	/* Get IP address of client. */
-	addrlen = sizeof(addr);
-	memset(&addr, 0, sizeof(addr));
-
-	if (remote) {
-		if (getpeername(socket, (struct sockaddr *)&addr, &addrlen)
-		    < 0)
-			return NULL;
-	} else {
-		if (getsockname(socket, (struct sockaddr *)&addr, &addrlen)
-		    < 0)
-			return NULL;
-	}
-
-	/* Work around Linux IPv6 weirdness */
-	if (addr.ss_family == AF_INET6)
-		addrlen = sizeof(struct sockaddr_in6);
-
-	/* Get the address in ascii. */
-	if (getnameinfo((struct sockaddr *)&addr, addrlen, ntop, sizeof(ntop),
-	    NULL, 0, flags) != 0) {
-		error("get_socket_address: getnameinfo %d failed", flags);
-		return NULL;
-	}
-	return xstrdup(ntop);
-}
-
-char *
-get_peer_ipaddr(int socket)
-{
-	char *p;
-
-	if ((p = get_socket_address(socket, 1, NI_NUMERICHOST)) != NULL)
-		return p;
-	return xstrdup("UNKNOWN");
-}
-
-char *
-get_local_ipaddr(int socket)
-{
-	char *p;
-
-	if ((p = get_socket_address(socket, 0, NI_NUMERICHOST)) != NULL)
-		return p;
-	return xstrdup("UNKNOWN");
-}
-
-char *
-get_local_name(int socket)
-{
-	return get_socket_address(socket, 0, NI_NAMEREQD);
-}
-
-/*
- * Returns the IP-address of the remote host as a string.  The returned
- * string must not be freed.
- */
-
-const char *
-get_remote_ipaddr(void)
-{
-	static char *canonical_host_ip = NULL;
-
-	/* Check whether we have cached the ipaddr. */
-	if (canonical_host_ip == NULL) {
-		if (packet_connection_is_on_socket()) {
-			canonical_host_ip =
-			    get_peer_ipaddr(packet_get_connection_in());
-			if (canonical_host_ip == NULL)
-				fatal_cleanup();
-		} else {
-			/* If not on socket, return UNKNOWN. */
-			canonical_host_ip = xstrdup("UNKNOWN");
-		}
-	}
-	return canonical_host_ip;
-}
-
-const char *
-get_remote_name_or_ip(u_int utmp_len, int verify_reverse_mapping)
-{
-	static const char *remote = "";
-	if (utmp_len > 0)
-		remote = get_canonical_hostname(verify_reverse_mapping);
-	if (utmp_len == 0 || strlen(remote) > utmp_len)
-		remote = get_remote_ipaddr();
-	return remote;
-}
-
-/* Returns the local/remote port for the socket. */
-
-static int
-get_sock_port(int sock, int local)
-{
-	struct sockaddr_storage from;
-	socklen_t fromlen;
-	char strport[NI_MAXSERV];
-
-	/* Get IP address of client. */
-	fromlen = sizeof(from);
-	memset(&from, 0, sizeof(from));
-	if (local) {
-		if (getsockname(sock, (struct sockaddr *)&from, &fromlen) < 0) {
-			error("getsockname failed: %.100s", strerror(errno));
-			return 0;
-		}
-	} else {
-		if (getpeername(sock, (struct sockaddr *)&from, &fromlen) < 0) {
-			debug("getpeername failed: %.100s", strerror(errno));
-			fatal_cleanup();
-		}
-	}
-
-	/* Work around Linux IPv6 weirdness */
-	if (from.ss_family == AF_INET6)
-		fromlen = sizeof(struct sockaddr_in6);
-
-	/* Return port number. */
-	if (getnameinfo((struct sockaddr *)&from, fromlen, NULL, 0,
-	    strport, sizeof(strport), NI_NUMERICSERV) != 0)
-		fatal("get_sock_port: getnameinfo NI_NUMERICSERV failed");
-	return atoi(strport);
-}
-
-/* Returns remote/local port number for the current connection. */
-
-static int
-get_port(int local)
-{
-	/*
-	 * If the connection is not a socket, return 65535.  This is
-	 * intentionally chosen to be an unprivileged port number.
-	 */
-	if (!packet_connection_is_on_socket())
-		return 65535;
-
-	/* Get socket and return the port number. */
-	return get_sock_port(packet_get_connection_in(), local);
-}
-
-int
-get_peer_port(int sock)
-{
-	return get_sock_port(sock, 0);
-}
-
-int
-get_remote_port(void)
-{
-	return get_port(0);
-}
-
-int
-get_local_port(void)
-{
-	return get_port(1);
-}