Benny Prijono | 5dcb38d | 2005-11-21 01:55:47 +0000 | [diff] [blame] | 1 | /* $Id$ */ |
| 2 | /* |
Benny Prijono | a771a51 | 2007-02-19 01:13:53 +0000 | [diff] [blame] | 3 | * Copyright (C)2003-2007 Benny Prijono <benny@prijono.org> |
Benny Prijono | 5dcb38d | 2005-11-21 01:55:47 +0000 | [diff] [blame] | 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 18 | */ |
| 19 | #include <pj/addr_resolv.h> |
| 20 | #include <pj/assert.h> |
| 21 | #include <pj/string.h> |
Benny Prijono | 5dcb38d | 2005-11-21 01:55:47 +0000 | [diff] [blame] | 22 | #include <pj/errno.h> |
Benny Prijono | 594e4c5 | 2006-09-14 18:51:01 +0000 | [diff] [blame] | 23 | #include <pj/compat/socket.h> |
Benny Prijono | 5dcb38d | 2005-11-21 01:55:47 +0000 | [diff] [blame] | 24 | |
| 25 | |
| 26 | PJ_DEF(pj_status_t) pj_gethostbyname(const pj_str_t *hostname, pj_hostent *phe) |
| 27 | { |
| 28 | struct hostent *he; |
| 29 | char copy[PJ_MAX_HOSTNAME]; |
| 30 | |
| 31 | pj_assert(hostname && hostname ->slen < PJ_MAX_HOSTNAME); |
| 32 | |
| 33 | if (hostname->slen >= PJ_MAX_HOSTNAME) |
| 34 | return PJ_ENAMETOOLONG; |
| 35 | |
| 36 | pj_memcpy(copy, hostname->ptr, hostname->slen); |
| 37 | copy[ hostname->slen ] = '\0'; |
| 38 | |
| 39 | he = gethostbyname(copy); |
Benny Prijono | 64df0eb | 2007-01-26 17:09:14 +0000 | [diff] [blame] | 40 | if (!he) { |
Benny Prijono | 129287a | 2007-03-01 16:52:45 +0000 | [diff] [blame] | 41 | return PJ_ERESOLVE; |
| 42 | /* DO NOT use pj_get_netos_error() since host resolution error |
| 43 | * is reported in h_errno instead of errno! |
Benny Prijono | 64df0eb | 2007-01-26 17:09:14 +0000 | [diff] [blame] | 44 | return pj_get_netos_error(); |
Benny Prijono | 129287a | 2007-03-01 16:52:45 +0000 | [diff] [blame] | 45 | */ |
Benny Prijono | 64df0eb | 2007-01-26 17:09:14 +0000 | [diff] [blame] | 46 | } |
Benny Prijono | 5dcb38d | 2005-11-21 01:55:47 +0000 | [diff] [blame] | 47 | |
| 48 | phe->h_name = he->h_name; |
| 49 | phe->h_aliases = he->h_aliases; |
| 50 | phe->h_addrtype = he->h_addrtype; |
| 51 | phe->h_length = he->h_length; |
| 52 | phe->h_addr_list = he->h_addr_list; |
| 53 | |
| 54 | return PJ_SUCCESS; |
| 55 | } |
| 56 | |
Benny Prijono | 594e4c5 | 2006-09-14 18:51:01 +0000 | [diff] [blame] | 57 | /* Resolve the IP address of local machine */ |
| 58 | pj_status_t pj_gethostip(pj_in_addr *addr) |
| 59 | { |
| 60 | const pj_str_t *hostname = pj_gethostname(); |
| 61 | struct pj_hostent he; |
Benny Prijono | 594e4c5 | 2006-09-14 18:51:01 +0000 | [diff] [blame] | 62 | pj_status_t status; |
| 63 | |
Benny Prijono | 594e4c5 | 2006-09-14 18:51:01 +0000 | [diff] [blame] | 64 | |
Benny Prijono | 5fb99e5 | 2007-01-23 04:17:56 +0000 | [diff] [blame] | 65 | #ifdef _MSC_VER |
| 66 | /* Get rid of "uninitialized he variable" with MS compilers */ |
| 67 | pj_bzero(&he, sizeof(he)); |
| 68 | #endif |
| 69 | |
Benny Prijono | 594e4c5 | 2006-09-14 18:51:01 +0000 | [diff] [blame] | 70 | /* Try with resolving local hostname first */ |
| 71 | status = pj_gethostbyname(hostname, &he); |
| 72 | if (status == PJ_SUCCESS) { |
| 73 | *addr = *(pj_in_addr*)he.h_addr; |
| 74 | } |
| 75 | |
| 76 | |
Benny Prijono | 56f4bb7 | 2007-03-01 17:29:53 +0000 | [diff] [blame] | 77 | /* If we end up with 127.x.x.x, resolve the IP by getting the default |
Benny Prijono | 594e4c5 | 2006-09-14 18:51:01 +0000 | [diff] [blame] | 78 | * interface to connect to some public host. |
| 79 | */ |
Benny Prijono | 56f4bb7 | 2007-03-01 17:29:53 +0000 | [diff] [blame] | 80 | if (status != PJ_SUCCESS || (pj_ntohl(addr->s_addr) >> 24)==127) { |
Benny Prijono | 594e4c5 | 2006-09-14 18:51:01 +0000 | [diff] [blame] | 81 | pj_sock_t fd; |
Benny Prijono | 56f4bb7 | 2007-03-01 17:29:53 +0000 | [diff] [blame] | 82 | pj_str_t cp; |
Benny Prijono | 594e4c5 | 2006-09-14 18:51:01 +0000 | [diff] [blame] | 83 | pj_sockaddr_in a; |
| 84 | int len; |
| 85 | |
| 86 | status = pj_sock_socket(PJ_AF_INET, PJ_SOCK_DGRAM, 0, &fd); |
| 87 | if (status != PJ_SUCCESS) { |
| 88 | return status; |
| 89 | } |
| 90 | |
| 91 | cp = pj_str("1.1.1.1"); |
| 92 | pj_sockaddr_in_init(&a, &cp, 53); |
| 93 | |
| 94 | status = pj_sock_connect(fd, &a, sizeof(a)); |
| 95 | if (status != PJ_SUCCESS) { |
| 96 | pj_sock_close(fd); |
Benny Prijono | b43bad7 | 2007-01-20 05:11:08 +0000 | [diff] [blame] | 97 | /* Return 127.0.0.1 as the address */ |
| 98 | return PJ_SUCCESS; |
Benny Prijono | 594e4c5 | 2006-09-14 18:51:01 +0000 | [diff] [blame] | 99 | } |
| 100 | |
| 101 | len = sizeof(a); |
| 102 | status = pj_sock_getsockname(fd, &a, &len); |
| 103 | if (status != PJ_SUCCESS) { |
| 104 | pj_sock_close(fd); |
Benny Prijono | b43bad7 | 2007-01-20 05:11:08 +0000 | [diff] [blame] | 105 | /* Return 127.0.0.1 as the address */ |
| 106 | return PJ_SUCCESS; |
Benny Prijono | 594e4c5 | 2006-09-14 18:51:01 +0000 | [diff] [blame] | 107 | } |
| 108 | |
| 109 | pj_sock_close(fd); |
| 110 | |
| 111 | *addr = a.sin_addr; |
| 112 | } |
| 113 | |
| 114 | return status; |
| 115 | } |
| 116 | |
| 117 | |