| /* |
| * Copyright (C) 2005 Nigel Horne <njh@bandsman.co.uk> |
| * |
| * 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., 51 Franklin Street, Fifth Floor, Boston, |
| * MA 02110-1301, USA. |
| * |
| */ |
| |
| #ifdef _MSC_VER |
| #include <windows.h> |
| #include <winsock.h> |
| #endif |
| |
| #if HAVE_CONFIG_H |
| #include "clamav-config.h" |
| #endif |
| |
| #include <stdio.h> |
| |
| #ifdef HAVE_STRING_H |
| #include <string.h> |
| #endif |
| |
| #ifdef HAVE_SYS_TYPES_H |
| #include <sys/types.h> |
| #endif |
| |
| #ifndef C_WINDOWS |
| #include <netdb.h> |
| #endif |
| |
| #ifdef CL_NOTHREADS |
| #undef CL_THREAD_SAFE |
| #endif |
| |
| #ifdef CL_THREAD_SAFE |
| #include <pthread.h> |
| #endif |
| |
| #include "network.h" |
| |
| /* |
| * TODO: gethostbyname_r is non-standard so different operating |
| * systems do it in different ways. Need more examples |
| * Perhaps we could use res_search()? |
| * |
| * Returns 0 for success |
| */ |
| int r_gethostbyname(const char *hostname, struct hostent *hp, char *buf, size_t len) |
| { |
| #if defined(HAVE_GETHOSTBYNAME_R_6) |
| /* e.g. Linux */ |
| struct hostent *hp2; |
| int ret = -1; |
| |
| if((hostname == NULL) || (hp == NULL)) |
| return -1; |
| if(gethostbyname_r(hostname, hp, buf, len, &hp2, &ret) < 0) |
| return ret; |
| #elif defined(HAVE_GETHOSTBYNAME_R_5) |
| /* e.g. BSD, Solaris, Cygwin */ |
| int ret = -1; |
| |
| if((hostname == NULL) || (hp == NULL)) |
| return -1; |
| if(gethostbyname_r(hostname, hp, buf, len, &ret) == NULL) |
| return ret; |
| #elif defined(HAVE_GETHOSTBYNAME_R_3) |
| /* e.g. HP/UX, AIX */ |
| if((hostname == NULL) || (hp == NULL)) |
| return -1; |
| if(gethostbyname_r(hostname, &hp, (struct hostent_data *)buf) < 0) |
| return h_errno; |
| #else |
| /* Single thread the code e.g. VS2005 */ |
| struct hostent *hp2; |
| #ifdef CL_THREAD_SAFE |
| static pthread_mutex_t hostent_mutex = PTHREAD_MUTEX_INITIALIZER; |
| #endif |
| |
| if((hostname == NULL) || (hp == NULL)) |
| return -1; |
| #ifdef CL_THREAD_SAFE |
| pthread_mutex_lock(&hostent_mutex); |
| #endif |
| if((hp2 = gethostbyname(hostname)) == NULL) { |
| #ifdef CL_THREAD_SAFE |
| pthread_mutex_unlock(&hostent_mutex); |
| #endif |
| return h_errno; |
| } |
| memcpy(hp, hp2, sizeof(struct hostent)); |
| #ifdef CL_THREAD_SAFE |
| pthread_mutex_unlock(&hostent_mutex); |
| #endif |
| |
| #endif |
| return 0; |
| } |