/***************************************************************************** * _ _ ____ _ * Project ___| | | | _ \| | * / __| | | | |_) | | * | (__| |_| | _ <| |___ * \___|\___/|_| \_\_____| * * Copyright (C) 2000, Daniel Stenberg, , et al. * * In order to be useful for every potential user, curl and libcurl are * dual-licensed under the MPL and the MIT/X-derivate licenses. * * You may opt to use, copy, modify, merge, publish, distribute and/or sell * copies of the Software, and permit persons to whom the Software is * furnished to do so, under the terms of the MPL or the MIT/X-derivate * licenses. You may pick one of these licenses. * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * * $Id$ *****************************************************************************/ #include "setup.h" #include #include #define _REENTRANT #if defined(WIN32) && !defined(__GNUC__) || defined(__MINGW32__) #include #else #ifdef HAVE_SYS_TYPES_H #include #endif #ifdef HAVE_SYS_SOCKET_H #include #endif #ifdef HAVE_NETINET_IN_H #include #endif #ifdef HAVE_NETDB_H #include #endif #ifdef HAVE_ARPA_INET_H #include #endif #endif #include "urldata.h" #include "sendf.h" #if defined(HAVE_INET_NTOA_R) && !defined(HAVE_INET_NTOA_R_DECL) #include "inet_ntoa_r.h" #endif /* The last #include file should be: */ #ifdef MALLOCDEBUG #include "memdebug.h" #endif /* --- resolve name or IP-number --- */ static char *MakeIP(unsigned long num,char *addr, int addr_len) { #if defined(HAVE_INET_NTOA) || defined(HAVE_INET_NTOA_R) struct in_addr in; in.s_addr = htonl(num); #if defined(HAVE_INET_NTOA_R) inet_ntoa_r(in,addr,addr_len); #else strncpy(addr,inet_ntoa(in),addr_len); #endif #else unsigned char *paddr; num = htonl(num); /* htonl() added to avoid endian probs */ paddr = (unsigned char *)# sprintf(addr, "%u.%u.%u.%u", paddr[0], paddr[1], paddr[2], paddr[3]); #endif return (addr); } #ifdef ENABLE_IPV6 struct addrinfo *Curl_getaddrinfo(struct UrlData *data, char *hostname, int port) { struct addrinfo hints, *res; int error; char sbuf[NI_MAXSERV]; memset(&hints, 0, sizeof(hints)); hints.ai_family = PF_UNSPEC; hints.ai_socktype = SOCK_STREAM; hints.ai_flags = AI_CANONNAME; snprintf(sbuf, sizeof(sbuf), "%d", port); error = getaddrinfo(hostname, sbuf, &hints, &res); if (error) { infof(data, "getaddrinfo(3) failed for %s\n", hostname); return NULL; } return res; } #endif /* The original code to this function was once stolen from the Dancer source code, written by Bjorn Reese, it has since been patched and modified considerably. */ #ifndef INADDR_NONE #define INADDR_NONE (unsigned long) ~0 #endif struct hostent *Curl_gethost(struct UrlData *data, char *hostname, char **bufp) { struct hostent *h = NULL; unsigned long in; int ret; /* this variable is unused on several platforms but used on some */ #define CURL_NAMELOOKUP_SIZE 9000 /* Allocate enough memory to hold the full name information structs and * everything. OSF1 is known to require at least 8872 bytes. The buffer * required for storing all possible aliases and IP numbers is according to * Stevens' Unix Network Programming 2nd editor, p. 304: 8192 bytes! */ char *buf = (char *)malloc(CURL_NAMELOOKUP_SIZE); if(!buf) return NULL; /* major failure */ *bufp = buf; if ( (in=inet_addr(hostname)) != INADDR_NONE ) { struct in_addr *addrentry; h = (struct hostent*)buf; h->h_addr_list = (char**)(buf + sizeof(*h)); addrentry = (struct in_addr*)(h->h_addr_list + 2); addrentry->s_addr = in; h->h_addr_list[0] = (char*)addrentry; h->h_addr_list[1] = NULL; h->h_addrtype = AF_INET; h->h_length = sizeof(*addrentry); h->h_name = *(h->h_addr_list) + h->h_length; /* bad one h->h_name = (char*)(h->h_addr_list + h->h_length); */ MakeIP(ntohl(in),h->h_name, CURL_NAMELOOKUP_SIZE - (long)(h->h_name) + (long)buf); } #if defined(HAVE_GETHOSTBYNAME_R) else { int h_errnop; /* Workaround for gethostbyname_r bug in qnx nto. It is also _required_ for some of these functions. */ memset(buf, 0, CURL_NAMELOOKUP_SIZE); #ifdef HAVE_GETHOSTBYNAME_R_5 /* Solaris, IRIX and more */ if ((h = gethostbyname_r(hostname, (struct hostent *)buf, buf + sizeof(struct hostent), CURL_NAMELOOKUP_SIZE - sizeof(struct hostent), &h_errnop)) == NULL ) #endif #ifdef HAVE_GETHOSTBYNAME_R_6 /* Linux */ if( gethostbyname_r(hostname, (struct hostent *)buf, buf + sizeof(struct hostent), CURL_NAMELOOKUP_SIZE - sizeof(struct hostent), &h, /* DIFFERENCE */ &h_errnop)) #endif #ifdef HAVE_GETHOSTBYNAME_R_3 /* AIX, Digital Unix, HPUX 10, more? */ if(CURL_NAMELOOKUP_SIZE >= (sizeof(struct hostent)+sizeof(struct hostent_data))) /* August 22nd, 2000: Albert Chin-A-Young brought an updated version * that should work! September 20: Richard Prescott worked on the buffer * size dilemma. */ ret = gethostbyname_r(hostname, (struct hostent *)buf, (struct hostent_data *)(buf + sizeof(struct hostent))); else ret = -1; /* failure, too smallish buffer size */ /* result expected in h */ h = (struct hostent*)buf; h_errnop= errno; /* we don't deal with this, but set it anyway */ if(ret) #endif { infof(data, "gethostbyname_r(2) failed for %s\n", hostname); h = NULL; /* set return code to NULL */ free(buf); *bufp=NULL; } #else else { if ((h = gethostbyname(hostname)) == NULL ) { infof(data, "gethostbyname(2) failed for %s\n", hostname); free(buf); *bufp=NULL; } #endif } return (h); }