X-Git-Url: https://mattmccutchen.net/rsync/rsync.git/blobdiff_plain/25ff04417e4b4fa0aeb44e0b1576a01021aa1650..82b2a31a46d7c94f951b96f61c9935198f0f53f1:/clientname.c diff --git a/clientname.c b/clientname.c index ed8e97fd..e5684f8f 100644 --- a/clientname.c +++ b/clientname.c @@ -1,40 +1,34 @@ -/* -*- c-file-style: "linux" -*- - - rsync -- fast file replication program - - Copyright (C) 1992-2001 by Andrew Tridgell - Copyright (C) 2001, 2002 by Martin Pool - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. -*/ - -/** - * @file clientname.c - * +/* * Functions for looking up the remote name or addr of a socket. * + * Copyright (C) 1992-2001 Andrew Tridgell + * Copyright (C) 2001, 2002 Martin Pool + * Copyright (C) 2002-2009 Wayne Davison + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, visit the http://fsf.org website. + */ + +/* * This file is now converted to use the new-style getaddrinfo() * interface, which supports IPv6 but is also supported on recent * IPv4-only machines. On systems that don't have that interface, we * emulate it using the KAME implementation. - **/ + */ #include "rsync.h" static const char default_name[] = "UNKNOWN"; -extern int am_daemon; extern int am_server; @@ -55,7 +49,7 @@ char *client_addr(int fd) initialised = 1; if (am_server) { /* daemon over --rsh mode */ - strcpy(addr_buf, "0.0.0.0"); + strlcpy(addr_buf, "0.0.0.0", sizeof addr_buf); if ((ssh_info = getenv("SSH_CONNECTION")) != NULL || (ssh_info = getenv("SSH_CLIENT")) != NULL || (ssh_info = getenv("SSH2_CLIENT")) != NULL) { @@ -104,7 +98,7 @@ char *client_name(int fd) if (initialised) return name_buf; - strcpy(name_buf, default_name); + strlcpy(name_buf, default_name, sizeof name_buf); initialised = 1; memset(&ss, 0, sizeof ss); @@ -114,6 +108,9 @@ char *client_name(int fd) struct addrinfo hint, *answer; int err; + if (strcmp(addr, "0.0.0.0") == 0) + return name_buf; + memset(&hint, 0, sizeof hint); #ifdef AI_NUMERICHOST @@ -132,12 +129,14 @@ char *client_name(int fd) ss_len = sizeof (struct sockaddr_in); memcpy(&ss, answer->ai_addr, ss_len); break; -#if INET6 +#ifdef INET6 case AF_INET6: ss_len = sizeof (struct sockaddr_in6); memcpy(&ss, answer->ai_addr, ss_len); break; #endif + default: + exit_cleanup(RERR_SOCKETIO); } freeaddrinfo(answer); } else { @@ -147,7 +146,7 @@ char *client_name(int fd) if (lookup_name(fd, &ss, ss_len, name_buf, sizeof name_buf, port_buf, sizeof port_buf) == 0) - check_name(fd, &ss, name_buf); + check_name(fd, &ss, name_buf, sizeof name_buf); return name_buf; } @@ -172,7 +171,7 @@ void client_sockaddr(int fd, exit_cleanup(RERR_SOCKETIO); } -#if INET6 +#ifdef INET6 if (get_sockaddr_family(ss) == AF_INET6 && IN6_IS_ADDR_V4MAPPED(&((struct sockaddr_in6 *)ss)->sin6_addr)) { /* OK, so ss is in the IPv6 family, but it is really @@ -189,7 +188,7 @@ void client_sockaddr(int fd, memset(sin, 0, sizeof *sin); sin->sin_family = AF_INET; *ss_len = sizeof (struct sockaddr_in); -#if HAVE_SOCKADDR_IN_LEN +#ifdef HAVE_SOCKADDR_IN_LEN sin->sin_len = *ss_len; #endif sin->sin_port = sin6.sin6_port; @@ -211,18 +210,18 @@ void client_sockaddr(int fd, **/ int lookup_name(int fd, const struct sockaddr_storage *ss, socklen_t ss_len, - char *name_buf, size_t name_buf_len, - char *port_buf, size_t port_buf_len) + char *name_buf, size_t name_buf_size, + char *port_buf, size_t port_buf_size) { int name_err; /* reverse lookup */ name_err = getnameinfo((struct sockaddr *) ss, ss_len, - name_buf, name_buf_len, - port_buf, port_buf_len, + name_buf, name_buf_size, + port_buf, port_buf_size, NI_NAMEREQD | NI_NUMERICSERV); if (name_err != 0) { - strcpy(name_buf, default_name); + strlcpy(name_buf, default_name, name_buf_size); rprintf(FLOG, "name lookup failed for %s: %s\n", client_addr(fd), gai_strerror(name_err)); return name_err; @@ -261,7 +260,7 @@ int compare_addrinfo_sockaddr(const struct addrinfo *ai, sizeof sin1->sin_addr); } -#if INET6 +#ifdef INET6 if (ss_family == AF_INET6) { const struct sockaddr_in6 *sin1, *sin2; @@ -270,7 +269,7 @@ int compare_addrinfo_sockaddr(const struct addrinfo *ai, if (ai->ai_addrlen < sizeof (struct sockaddr_in6)) { rprintf(FLOG, "%s: too short sockaddr_in6; length=%d\n", - fn, ai->ai_addrlen); + fn, (int)ai->ai_addrlen); return 1; } @@ -278,7 +277,7 @@ int compare_addrinfo_sockaddr(const struct addrinfo *ai, sizeof sin1->sin6_addr)) return 1; -#if HAVE_SOCKADDR_IN6_SCOPE_ID +#ifdef HAVE_SOCKADDR_IN6_SCOPE_ID if (sin1->sin6_scope_id != sin2->sin6_scope_id) return 1; #endif @@ -303,7 +302,7 @@ int compare_addrinfo_sockaddr(const struct addrinfo *ai, **/ int check_name(int fd, const struct sockaddr_storage *ss, - char *name_buf) + char *name_buf, size_t name_buf_size) { struct addrinfo hints, *res, *res0; int error; @@ -317,11 +316,10 @@ int check_name(int fd, if (error) { rprintf(FLOG, "forward name lookup for %s failed: %s\n", name_buf, gai_strerror(error)); - strcpy(name_buf, default_name); + strlcpy(name_buf, default_name, name_buf_size); return error; } - /* Given all these results, we expect that one of them will be * the same as ss. The comparison is a bit complicated. */ for (res = res0; res; res = res->ai_next) { @@ -334,13 +332,13 @@ int check_name(int fd, * address that was the same as ss. */ rprintf(FLOG, "no known address for \"%s\": " "spoofed address?\n", name_buf); - strcpy(name_buf, default_name); + strlcpy(name_buf, default_name, name_buf_size); } else if (res == NULL) { /* We hit the end of the list without finding an * address that was the same as ss. */ rprintf(FLOG, "%s is not a known address for \"%s\": " "spoofed address?\n", client_addr(fd), name_buf); - strcpy(name_buf, default_name); + strlcpy(name_buf, default_name, name_buf_size); } freeaddrinfo(res0);