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authorRemko Tronçon <git@el-tramo.be>2012-04-01 09:27:45 (GMT)
committerRemko Tronçon <git@el-tramo.be>2012-04-01 09:27:45 (GMT)
commite9a33e1cfc91af374f928931f47b19f53cb165d7 (patch)
treef0a72876d8b0f53f6e5a335321aca785e81129dd /3rdParty/CAres/src/ares_gethostbyname.c
parent950dfa7923f62297429e49a135e4fb363447366d (diff)
downloadswift-contrib-e9a33e1cfc91af374f928931f47b19f53cb165d7.zip
swift-contrib-e9a33e1cfc91af374f928931f47b19f53cb165d7.tar.bz2
Removing CAres resolver.
This has never been used.
Diffstat (limited to '3rdParty/CAres/src/ares_gethostbyname.c')
-rw-r--r--3rdParty/CAres/src/ares_gethostbyname.c511
1 files changed, 0 insertions, 511 deletions
diff --git a/3rdParty/CAres/src/ares_gethostbyname.c b/3rdParty/CAres/src/ares_gethostbyname.c
deleted file mode 100644
index fc66c6f..0000000
--- a/3rdParty/CAres/src/ares_gethostbyname.c
+++ /dev/null
@@ -1,511 +0,0 @@
-/* $Id: ares_gethostbyname.c,v 1.50 2009-11-02 11:55:53 yangtse Exp $ */
-
-/* Copyright 1998 by the Massachusetts Institute of Technology.
- *
- * Permission to use, copy, modify, and distribute this
- * software and its documentation for any purpose and without
- * fee is hereby granted, provided that the above copyright
- * notice appear in all copies and that both that copyright
- * notice and this permission notice appear in supporting
- * documentation, and that the name of M.I.T. not be used in
- * advertising or publicity pertaining to distribution of the
- * software without specific, written prior permission.
- * M.I.T. makes no representations about the suitability of
- * this software for any purpose. It is provided "as is"
- * without express or implied warranty.
- */
-
-#include "ares_setup.h"
-
-#ifdef HAVE_SYS_SOCKET_H
-# include <sys/socket.h>
-#endif
-#ifdef HAVE_NETINET_IN_H
-# include <netinet/in.h>
-#endif
-#ifdef HAVE_NETDB_H
-# include <netdb.h>
-#endif
-#ifdef HAVE_ARPA_INET_H
-# include <arpa/inet.h>
-#endif
-#ifdef HAVE_ARPA_NAMESER_H
-# include <arpa/nameser.h>
-#else
-# include "nameser.h"
-#endif
-#ifdef HAVE_ARPA_NAMESER_COMPAT_H
-# include <arpa/nameser_compat.h>
-#endif
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <ctype.h>
-#ifdef HAVE_STRINGS_H
-#include <strings.h>
-#endif
-
-#include "ares.h"
-#include "inet_net_pton.h"
-#include "bitncmp.h"
-#include "ares_private.h"
-
-#ifdef WATT32
-#undef WIN32
-#endif
-
-struct host_query {
- /* Arguments passed to ares_gethostbyname() */
- ares_channel channel;
- char *name;
- ares_host_callback callback;
- void *arg;
- int sent_family; /* this family is what was is being used */
- int want_family; /* this family is what is asked for in the API */
- const char *remaining_lookups;
- int timeouts;
-};
-
-static void next_lookup(struct host_query *hquery, int status_code);
-static void host_callback(void *arg, int status, int timeouts,
- unsigned char *abuf, int alen);
-static void end_hquery(struct host_query *hquery, int status,
- struct hostent *host);
-static int fake_hostent(const char *name, int family,
- ares_host_callback callback, void *arg);
-static int file_lookup(const char *name, int family, struct hostent **host);
-static void sort_addresses(struct hostent *host,
- const struct apattern *sortlist, int nsort);
-static void sort6_addresses(struct hostent *host,
- const struct apattern *sortlist, int nsort);
-static int get_address_index(const struct in_addr *addr,
- const struct apattern *sortlist, int nsort);
-static int get6_address_index(const struct in6_addr *addr,
- const struct apattern *sortlist, int nsort);
-
-void ares_gethostbyname(ares_channel channel, const char *name, int family,
- ares_host_callback callback, void *arg)
-{
- struct host_query *hquery;
-
- /* Right now we only know how to look up Internet addresses - and unspec
- means try both basically. */
- switch (family) {
- case AF_INET:
- case AF_INET6:
- case AF_UNSPEC:
- break;
- default:
- callback(arg, ARES_ENOTIMP, 0, NULL);
- return;
- }
-
- if (fake_hostent(name, family, callback, arg))
- return;
-
- /* Allocate and fill in the host query structure. */
- hquery = malloc(sizeof(struct host_query));
- if (!hquery)
- {
- callback(arg, ARES_ENOMEM, 0, NULL);
- return;
- }
- hquery->channel = channel;
- hquery->name = strdup(name);
- hquery->want_family = family;
- hquery->sent_family = -1; /* nothing is sent yet */
- if (!hquery->name) {
- free(hquery);
- callback(arg, ARES_ENOMEM, 0, NULL);
- return;
- }
- hquery->callback = callback;
- hquery->arg = arg;
- hquery->remaining_lookups = channel->lookups;
- hquery->timeouts = 0;
-
- /* Start performing lookups according to channel->lookups. */
- next_lookup(hquery, ARES_ECONNREFUSED /* initial error code */);
-}
-
-static void next_lookup(struct host_query *hquery, int status_code)
-{
- const char *p;
- struct hostent *host;
- int status = status_code;
-
- for (p = hquery->remaining_lookups; *p; p++)
- {
- switch (*p)
- {
- case 'b':
- /* DNS lookup */
- hquery->remaining_lookups = p + 1;
- if ((hquery->want_family == AF_INET6) ||
- (hquery->want_family == AF_UNSPEC)) {
- /* if inet6 or unspec, start out with AAAA */
- hquery->sent_family = AF_INET6;
- ares_search(hquery->channel, hquery->name, C_IN, T_AAAA,
- host_callback, hquery);
- }
- else {
- hquery->sent_family = AF_INET;
- ares_search(hquery->channel, hquery->name, C_IN, T_A, host_callback,
- hquery);
- }
- return;
-
- case 'f':
- /* Host file lookup */
- status = file_lookup(hquery->name, hquery->want_family, &host);
-
- /* this status check below previously checked for !ARES_ENOTFOUND,
- but we should not assume that this single error code is the one
- that can occur, as that is in fact no longer the case */
- if (status == ARES_SUCCESS)
- {
- end_hquery(hquery, status, host);
- return;
- }
- status = status_code; /* Use original status code */
- break;
- }
- }
- end_hquery(hquery, status, NULL);
-}
-
-static void host_callback(void *arg, int status, int timeouts,
- unsigned char *abuf, int alen)
-{
- struct host_query *hquery = (struct host_query *) arg;
- ares_channel channel = hquery->channel;
- struct hostent *host = NULL;
-
- hquery->timeouts += timeouts;
- if (status == ARES_SUCCESS)
- {
- if (hquery->sent_family == AF_INET)
- {
- status = ares_parse_a_reply(abuf, alen, &host, NULL, NULL);
- if (host && channel->nsort)
- sort_addresses(host, channel->sortlist, channel->nsort);
- }
- else if (hquery->sent_family == AF_INET6)
- {
- status = ares_parse_aaaa_reply(abuf, alen, &host, NULL, NULL);
- if (status == ARES_ENODATA || status == ARES_EBADRESP) {
- /* The query returned something but either there were no AAAA records (e.g. just CNAME)
- or the response was malformed. Try looking up A instead.
- We should possibly limit this attempt-next logic to AF_UNSPEC lookups only. */
- hquery->sent_family = AF_INET;
- ares_search(hquery->channel, hquery->name, C_IN, T_A,
- host_callback, hquery);
- return;
- }
- if (host && channel->nsort)
- sort6_addresses(host, channel->sortlist, channel->nsort);
- }
- end_hquery(hquery, status, host);
- }
- else if ((status == ARES_ENODATA || status == ARES_EBADRESP || status == ARES_ETIMEOUT) && hquery->sent_family == AF_INET6)
- {
- /* The AAAA query yielded no useful result. Now look up an A instead.
- We should possibly limit this attempt-next logic to AF_UNSPEC lookups only. */
- hquery->sent_family = AF_INET;
- ares_search(hquery->channel, hquery->name, C_IN, T_A, host_callback,
- hquery);
- }
- else if (status == ARES_EDESTRUCTION)
- end_hquery(hquery, status, NULL);
- else
- next_lookup(hquery, status);
-}
-
-static void end_hquery(struct host_query *hquery, int status,
- struct hostent *host)
-{
- hquery->callback(hquery->arg, status, hquery->timeouts, host);
- if (host)
- ares_free_hostent(host);
- free(hquery->name);
- free(hquery);
-}
-
-/* If the name looks like an IP address, fake up a host entry, end the
- * query immediately, and return true. Otherwise return false.
- */
-static int fake_hostent(const char *name, int family, ares_host_callback callback,
- void *arg)
-{
- struct hostent hostent;
- char *aliases[1] = { NULL };
- char *addrs[2];
- int result = 0;
- struct in_addr in;
- struct in6_addr in6;
-
- if (family == AF_INET || family == AF_INET6)
- {
- /* It only looks like an IP address if it's all numbers and dots. */
- int numdots = 0, valid = 1;
- const char *p;
- for (p = name; *p; p++)
- {
- if (!ISDIGIT(*p) && *p != '.') {
- valid = 0;
- break;
- } else if (*p == '.') {
- numdots++;
- }
- }
-
- /* if we don't have 3 dots, it is illegal
- * (although inet_addr doesn't think so).
- */
- if (numdots != 3 || !valid)
- result = 0;
- else
- result = ((in.s_addr = inet_addr(name)) == INADDR_NONE ? 0 : 1);
-
- if (result)
- family = AF_INET;
- }
- if (family == AF_INET6)
- result = (ares_inet_pton(AF_INET6, name, &in6) < 1 ? 0 : 1);
-
- if (!result)
- return 0;
-
- if (family == AF_INET)
- {
- hostent.h_length = (int)sizeof(struct in_addr);
- addrs[0] = (char *)&in;
- }
- else if (family == AF_INET6)
- {
- hostent.h_length = (int)sizeof(struct in6_addr);
- addrs[0] = (char *)&in6;
- }
- /* Duplicate the name, to avoid a constness violation. */
- hostent.h_name = strdup(name);
- if (!hostent.h_name)
- {
- callback(arg, ARES_ENOMEM, 0, NULL);
- return 1;
- }
-
- /* Fill in the rest of the host structure and terminate the query. */
- addrs[1] = NULL;
- hostent.h_aliases = aliases;
- hostent.h_addrtype = family;
- hostent.h_addr_list = addrs;
- callback(arg, ARES_SUCCESS, 0, &hostent);
-
- free((char *)(hostent.h_name));
- return 1;
-}
-
-/* This is an API method */
-int ares_gethostbyname_file(ares_channel channel, const char *name,
- int family, struct hostent **host)
-{
- int result;
-
- /* We only take the channel to ensure that ares_init() been called. */
- if(channel == NULL)
- {
- /* Anything will do, really. This seems fine, and is consistent with
- other error cases. */
- *host = NULL;
- return ARES_ENOTFOUND;
- }
-
- /* Just chain to the internal implementation we use here; it's exactly
- * what we want.
- */
- result = file_lookup(name, family, host);
- if(result != ARES_SUCCESS)
- {
- /* We guarantee a NULL hostent on failure. */
- *host = NULL;
- }
- return result;
-}
-
-static int file_lookup(const char *name, int family, struct hostent **host)
-{
- FILE *fp;
- char **alias;
- int status;
- int error;
-
-#ifdef WIN32
- char PATH_HOSTS[MAX_PATH];
- if (IS_NT()) {
- char tmp[MAX_PATH];
- HKEY hkeyHosts;
-
- if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, WIN_NS_NT_KEY, 0, KEY_READ, &hkeyHosts)
- == ERROR_SUCCESS)
- {
- DWORD dwLength = MAX_PATH;
- RegQueryValueEx(hkeyHosts, DATABASEPATH, NULL, NULL, (LPBYTE)tmp,
- &dwLength);
- ExpandEnvironmentStrings(tmp, PATH_HOSTS, MAX_PATH);
- RegCloseKey(hkeyHosts);
- }
- }
- else
- GetWindowsDirectory(PATH_HOSTS, MAX_PATH);
-
- strcat(PATH_HOSTS, WIN_PATH_HOSTS);
-
-#elif defined(WATT32)
- extern const char *_w32_GetHostsFile (void);
- const char *PATH_HOSTS = _w32_GetHostsFile();
-
- if (!PATH_HOSTS)
- return ARES_ENOTFOUND;
-#endif
-
- fp = fopen(PATH_HOSTS, "r");
- if (!fp)
- {
- error = ERRNO;
- switch(error)
- {
- case ENOENT:
- case ESRCH:
- return ARES_ENOTFOUND;
- default:
- DEBUGF(fprintf(stderr, "fopen() failed with error: %d %s\n",
- error, strerror(error)));
- DEBUGF(fprintf(stderr, "Error opening file: %s\n",
- PATH_HOSTS));
- *host = NULL;
- return ARES_EFILE;
- }
- }
- while ((status = ares__get_hostent(fp, family, host)) == ARES_SUCCESS)
- {
- if (strcasecmp((*host)->h_name, name) == 0)
- break;
- for (alias = (*host)->h_aliases; *alias; alias++)
- {
- if (strcasecmp(*alias, name) == 0)
- break;
- }
- if (*alias)
- break;
- ares_free_hostent(*host);
- }
- fclose(fp);
- if (status == ARES_EOF)
- status = ARES_ENOTFOUND;
- if (status != ARES_SUCCESS)
- *host = NULL;
- return status;
-}
-
-static void sort_addresses(struct hostent *host, const struct apattern *sortlist,
- int nsort)
-{
- struct in_addr a1, a2;
- int i1, i2, ind1, ind2;
-
- /* This is a simple insertion sort, not optimized at all. i1 walks
- * through the address list, with the loop invariant that everything
- * to the left of i1 is sorted. In the loop body, the value at i1 is moved
- * back through the list (via i2) until it is in sorted order.
- */
- for (i1 = 0; host->h_addr_list[i1]; i1++)
- {
- memcpy(&a1, host->h_addr_list[i1], sizeof(struct in_addr));
- ind1 = get_address_index(&a1, sortlist, nsort);
- for (i2 = i1 - 1; i2 >= 0; i2--)
- {
- memcpy(&a2, host->h_addr_list[i2], sizeof(struct in_addr));
- ind2 = get_address_index(&a2, sortlist, nsort);
- if (ind2 <= ind1)
- break;
- memcpy(host->h_addr_list[i2 + 1], &a2, sizeof(struct in_addr));
- }
- memcpy(host->h_addr_list[i2 + 1], &a1, sizeof(struct in_addr));
- }
-}
-
-/* Find the first entry in sortlist which matches addr. Return nsort
- * if none of them match.
- */
-static int get_address_index(const struct in_addr *addr,
- const struct apattern *sortlist,
- int nsort)
-{
- int i;
-
- for (i = 0; i < nsort; i++)
- {
- if (sortlist[i].family != AF_INET)
- continue;
- if (sortlist[i].type == PATTERN_MASK)
- {
- if ((addr->s_addr & sortlist[i].mask.addr4.s_addr)
- == sortlist[i].addrV4.s_addr)
- break;
- }
- else
- {
- if (!ares_bitncmp(&addr->s_addr, &sortlist[i].addrV4.s_addr,
- sortlist[i].mask.bits))
- break;
- }
- }
- return i;
-}
-
-static void sort6_addresses(struct hostent *host, const struct apattern *sortlist,
- int nsort)
-{
- struct in6_addr a1, a2;
- int i1, i2, ind1, ind2;
-
- /* This is a simple insertion sort, not optimized at all. i1 walks
- * through the address list, with the loop invariant that everything
- * to the left of i1 is sorted. In the loop body, the value at i1 is moved
- * back through the list (via i2) until it is in sorted order.
- */
- for (i1 = 0; host->h_addr_list[i1]; i1++)
- {
- memcpy(&a1, host->h_addr_list[i1], sizeof(struct in6_addr));
- ind1 = get6_address_index(&a1, sortlist, nsort);
- for (i2 = i1 - 1; i2 >= 0; i2--)
- {
- memcpy(&a2, host->h_addr_list[i2], sizeof(struct in6_addr));
- ind2 = get6_address_index(&a2, sortlist, nsort);
- if (ind2 <= ind1)
- break;
- memcpy(host->h_addr_list[i2 + 1], &a2, sizeof(struct in6_addr));
- }
- memcpy(host->h_addr_list[i2 + 1], &a1, sizeof(struct in6_addr));
- }
-}
-
-/* Find the first entry in sortlist which matches addr. Return nsort
- * if none of them match.
- */
-static int get6_address_index(const struct in6_addr *addr,
- const struct apattern *sortlist,
- int nsort)
-{
- int i;
-
- for (i = 0; i < nsort; i++)
- {
- if (sortlist[i].family != AF_INET6)
- continue;
- if (!ares_bitncmp(&addr->s6_addr, &sortlist[i].addrV6.s6_addr, sortlist[i].mask.bits))
- break;
- }
- return i;
-}