| /* $Id$ */ |
| /* |
| * Copyright (C)2003-2007 Benny Prijono <benny@prijono.org> |
| * |
| * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| #include <pj/addr_resolv.h> |
| #include <pj/assert.h> |
| #include <pj/string.h> |
| #include <pj/errno.h> |
| #include <pj/compat/socket.h> |
| |
| |
| PJ_DEF(pj_status_t) pj_gethostbyname(const pj_str_t *hostname, pj_hostent *phe) |
| { |
| struct hostent *he; |
| char copy[PJ_MAX_HOSTNAME]; |
| |
| pj_assert(hostname && hostname ->slen < PJ_MAX_HOSTNAME); |
| |
| if (hostname->slen >= PJ_MAX_HOSTNAME) |
| return PJ_ENAMETOOLONG; |
| |
| pj_memcpy(copy, hostname->ptr, hostname->slen); |
| copy[ hostname->slen ] = '\0'; |
| |
| he = gethostbyname(copy); |
| if (!he) { |
| return PJ_ERESOLVE; |
| /* DO NOT use pj_get_netos_error() since host resolution error |
| * is reported in h_errno instead of errno! |
| return pj_get_netos_error(); |
| */ |
| } |
| |
| phe->h_name = he->h_name; |
| phe->h_aliases = he->h_aliases; |
| phe->h_addrtype = he->h_addrtype; |
| phe->h_length = he->h_length; |
| phe->h_addr_list = he->h_addr_list; |
| |
| return PJ_SUCCESS; |
| } |
| |
| /* Resolve the IP address of local machine */ |
| PJ_DEF(pj_status_t) pj_gethostip(pj_in_addr *addr) |
| { |
| const pj_str_t *hostname = pj_gethostname(); |
| struct pj_hostent he; |
| pj_status_t status; |
| |
| |
| #ifdef _MSC_VER |
| /* Get rid of "uninitialized he variable" with MS compilers */ |
| pj_bzero(&he, sizeof(he)); |
| #endif |
| |
| /* Try with resolving local hostname first */ |
| status = pj_gethostbyname(hostname, &he); |
| if (status == PJ_SUCCESS) { |
| *addr = *(pj_in_addr*)he.h_addr; |
| } |
| |
| |
| /* If we end up with 127.x.x.x, resolve the IP by getting the default |
| * interface to connect to some public host. |
| */ |
| if (status != PJ_SUCCESS || (pj_ntohl(addr->s_addr) >> 24)==127) { |
| pj_sock_t fd; |
| pj_str_t cp; |
| pj_sockaddr_in a; |
| int len; |
| |
| status = pj_sock_socket(PJ_AF_INET, PJ_SOCK_DGRAM, 0, &fd); |
| if (status != PJ_SUCCESS) { |
| return status; |
| } |
| |
| cp = pj_str("1.1.1.1"); |
| pj_sockaddr_in_init(&a, &cp, 53); |
| |
| status = pj_sock_connect(fd, &a, sizeof(a)); |
| if (status != PJ_SUCCESS) { |
| pj_sock_close(fd); |
| /* Return 127.0.0.1 as the address */ |
| return PJ_SUCCESS; |
| } |
| |
| len = sizeof(a); |
| status = pj_sock_getsockname(fd, &a, &len); |
| if (status != PJ_SUCCESS) { |
| pj_sock_close(fd); |
| /* Return 127.0.0.1 as the address */ |
| return PJ_SUCCESS; |
| } |
| |
| pj_sock_close(fd); |
| |
| *addr = a.sin_addr; |
| } |
| |
| return status; |
| } |
| |
| |