diff options
Diffstat (limited to 'external/libcurl_android/jni/libcurl/lib/hostip.c')
| -rwxr-xr-x | external/libcurl_android/jni/libcurl/lib/hostip.c | 857 |
1 files changed, 0 insertions, 857 deletions
diff --git a/external/libcurl_android/jni/libcurl/lib/hostip.c b/external/libcurl_android/jni/libcurl/lib/hostip.c deleted file mode 100755 index 73b3f820..00000000 --- a/external/libcurl_android/jni/libcurl/lib/hostip.c +++ /dev/null @@ -1,857 +0,0 @@ -/*************************************************************************** - * _ _ ____ _ - * Project ___| | | | _ \| | - * / __| | | | |_) | | - * | (__| |_| | _ <| |___ - * \___|\___/|_| \_\_____| - * - * Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al. - * - * This software is licensed as described in the file COPYING, which - * you should have received as part of this distribution. The terms - * are also available at http://curl.haxx.se/docs/copyright.html. - * - * 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 COPYING file. - * - * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY - * KIND, either express or implied. - * - ***************************************************************************/ - -#include "curl_setup.h" - -#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 __VMS -#include <in.h> -#include <inet.h> -#endif - -#ifdef HAVE_SETJMP_H -#include <setjmp.h> -#endif -#ifdef HAVE_SIGNAL_H -#include <signal.h> -#endif - -#ifdef HAVE_PROCESS_H -#include <process.h> -#endif - -#include "urldata.h" -#include "sendf.h" -#include "hostip.h" -#include "hash.h" -#include "share.h" -#include "strerror.h" -#include "url.h" -#include "inet_ntop.h" -#include "warnless.h" - -#define _MPRINTF_REPLACE /* use our functions only */ -#include <curl/mprintf.h> - -#include "curl_memory.h" -/* The last #include file should be: */ -#include "memdebug.h" - -#if defined(CURLRES_SYNCH) && \ - defined(HAVE_ALARM) && defined(SIGALRM) && defined(HAVE_SIGSETJMP) -/* alarm-based timeouts can only be used with all the dependencies satisfied */ -#define USE_ALARM_TIMEOUT -#endif - -/* - * hostip.c explained - * ================== - * - * The main COMPILE-TIME DEFINES to keep in mind when reading the host*.c - * source file are these: - * - * CURLRES_IPV6 - this host has getaddrinfo() and family, and thus we use - * that. The host may not be able to resolve IPv6, but we don't really have to - * take that into account. Hosts that aren't IPv6-enabled have CURLRES_IPV4 - * defined. - * - * CURLRES_ARES - is defined if libcurl is built to use c-ares for - * asynchronous name resolves. This can be Windows or *nix. - * - * CURLRES_THREADED - is defined if libcurl is built to run under (native) - * Windows, and then the name resolve will be done in a new thread, and the - * supported API will be the same as for ares-builds. - * - * If any of the two previous are defined, CURLRES_ASYNCH is defined too. If - * libcurl is not built to use an asynchronous resolver, CURLRES_SYNCH is - * defined. - * - * The host*.c sources files are split up like this: - * - * hostip.c - method-independent resolver functions and utility functions - * hostasyn.c - functions for asynchronous name resolves - * hostsyn.c - functions for synchronous name resolves - * hostip4.c - ipv4-specific functions - * hostip6.c - ipv6-specific functions - * - * The two asynchronous name resolver backends are implemented in: - * asyn-ares.c - functions for ares-using name resolves - * asyn-thread.c - functions for threaded name resolves - - * The hostip.h is the united header file for all this. It defines the - * CURLRES_* defines based on the config*.h and curl_setup.h defines. - */ - -/* These two symbols are for the global DNS cache */ -static struct curl_hash hostname_cache; -static int host_cache_initialized; - -static void freednsentry(void *freethis); - -/* - * Curl_global_host_cache_init() initializes and sets up a global DNS cache. - * Global DNS cache is general badness. Do not use. This will be removed in - * a future version. Use the share interface instead! - * - * Returns a struct curl_hash pointer on success, NULL on failure. - */ -struct curl_hash *Curl_global_host_cache_init(void) -{ - int rc = 0; - if(!host_cache_initialized) { - rc = Curl_hash_init(&hostname_cache, 7, Curl_hash_str, - Curl_str_key_compare, freednsentry); - if(!rc) - host_cache_initialized = 1; - } - return rc?NULL:&hostname_cache; -} - -/* - * Destroy and cleanup the global DNS cache - */ -void Curl_global_host_cache_dtor(void) -{ - if(host_cache_initialized) { - /* first make sure that any custom "CURLOPT_RESOLVE" names are - cleared off */ - Curl_hostcache_clean(NULL, &hostname_cache); - /* then free the remaining hash completely */ - Curl_hash_clean(&hostname_cache); - host_cache_initialized = 0; - } -} - -/* - * Return # of adresses in a Curl_addrinfo struct - */ -int Curl_num_addresses(const Curl_addrinfo *addr) -{ - int i = 0; - while(addr) { - addr = addr->ai_next; - i++; - } - return i; -} - -/* - * Curl_printable_address() returns a printable version of the 1st address - * given in the 'ai' argument. The result will be stored in the buf that is - * bufsize bytes big. - * - * If the conversion fails, it returns NULL. - */ -const char * -Curl_printable_address(const Curl_addrinfo *ai, char *buf, size_t bufsize) -{ - const struct sockaddr_in *sa4; - const struct in_addr *ipaddr4; -#ifdef ENABLE_IPV6 - const struct sockaddr_in6 *sa6; - const struct in6_addr *ipaddr6; -#endif - - switch (ai->ai_family) { - case AF_INET: - sa4 = (const void *)ai->ai_addr; - ipaddr4 = &sa4->sin_addr; - return Curl_inet_ntop(ai->ai_family, (const void *)ipaddr4, buf, - bufsize); -#ifdef ENABLE_IPV6 - case AF_INET6: - sa6 = (const void *)ai->ai_addr; - ipaddr6 = &sa6->sin6_addr; - return Curl_inet_ntop(ai->ai_family, (const void *)ipaddr6, buf, - bufsize); -#endif - default: - break; - } - return NULL; -} - -/* - * Return a hostcache id string for the provided host + port, to be used by - * the DNS caching. - */ -static char * -create_hostcache_id(const char *name, int port) -{ - /* create and return the new allocated entry */ - char *id = aprintf("%s:%d", name, port); - char *ptr = id; - if(ptr) { - /* lower case the name part */ - while(*ptr && (*ptr != ':')) { - *ptr = (char)TOLOWER(*ptr); - ptr++; - } - } - return id; -} - -struct hostcache_prune_data { - long cache_timeout; - time_t now; -}; - -/* - * This function is set as a callback to be called for every entry in the DNS - * cache when we want to prune old unused entries. - * - * Returning non-zero means remove the entry, return 0 to keep it in the - * cache. - */ -static int -hostcache_timestamp_remove(void *datap, void *hc) -{ - struct hostcache_prune_data *data = - (struct hostcache_prune_data *) datap; - struct Curl_dns_entry *c = (struct Curl_dns_entry *) hc; - - return !c->inuse && (data->now - c->timestamp >= data->cache_timeout); -} - -/* - * Prune the DNS cache. This assumes that a lock has already been taken. - */ -static void -hostcache_prune(struct curl_hash *hostcache, long cache_timeout, time_t now) -{ - struct hostcache_prune_data user; - - user.cache_timeout = cache_timeout; - user.now = now; - - Curl_hash_clean_with_criterium(hostcache, - (void *) &user, - hostcache_timestamp_remove); -} - -/* - * Library-wide function for pruning the DNS cache. This function takes and - * returns the appropriate locks. - */ -void Curl_hostcache_prune(struct SessionHandle *data) -{ - time_t now; - - if((data->set.dns_cache_timeout == -1) || !data->dns.hostcache) - /* cache forever means never prune, and NULL hostcache means - we can't do it */ - return; - - if(data->share) - Curl_share_lock(data, CURL_LOCK_DATA_DNS, CURL_LOCK_ACCESS_SINGLE); - - time(&now); - - /* Remove outdated and unused entries from the hostcache */ - hostcache_prune(data->dns.hostcache, - data->set.dns_cache_timeout, - now); - - if(data->share) - Curl_share_unlock(data, CURL_LOCK_DATA_DNS); -} - -/* - * Check if the entry should be pruned. Assumes a locked cache. - */ -static int -remove_entry_if_stale(struct SessionHandle *data, struct Curl_dns_entry *dns) -{ - struct hostcache_prune_data user; - - if(!dns || (data->set.dns_cache_timeout == -1) || !data->dns.hostcache || - dns->inuse) - /* cache forever means never prune, and NULL hostcache means we can't do - it, if it still is in use then we leave it */ - return 0; - - time(&user.now); - user.cache_timeout = data->set.dns_cache_timeout; - - if(!hostcache_timestamp_remove(&user,dns) ) - return 0; - - Curl_hash_clean_with_criterium(data->dns.hostcache, - (void *) &user, - hostcache_timestamp_remove); - - return 1; -} - - -#ifdef HAVE_SIGSETJMP -/* Beware this is a global and unique instance. This is used to store the - return address that we can jump back to from inside a signal handler. This - is not thread-safe stuff. */ -sigjmp_buf curl_jmpenv; -#endif - -/* - * Curl_fetch_addr() fetches a 'Curl_dns_entry' already in the DNS cache. - * - * Curl_resolv() checks initially and multi_runsingle() checks each time - * it discovers the handle in the state WAITRESOLVE whether the hostname - * has already been resolved and the address has already been stored in - * the DNS cache. This short circuits waiting for a lot of pending - * lookups for the same hostname requested by different handles. - * - * Returns the Curl_dns_entry entry pointer or NULL if not in the cache. - */ -struct Curl_dns_entry * -Curl_fetch_addr(struct connectdata *conn, - const char *hostname, - int port, int *stale) -{ - char *entry_id = NULL; - struct Curl_dns_entry *dns = NULL; - size_t entry_len; - struct SessionHandle *data = conn->data; - - /* Create an entry id, based upon the hostname and port */ - entry_id = create_hostcache_id(hostname, port); - /* If we can't create the entry id, fail */ - if(!entry_id) - return dns; - - entry_len = strlen(entry_id); - - /* See if its already in our dns cache */ - dns = Curl_hash_pick(data->dns.hostcache, entry_id, entry_len+1); - - /* free the allocated entry_id again */ - free(entry_id); - - /* See whether the returned entry is stale. Done before we release lock */ - *stale = remove_entry_if_stale(data, dns); - if(*stale) - dns = NULL; /* the memory deallocation is being handled by the hash */ - - return dns; -} - -/* - * Curl_cache_addr() stores a 'Curl_addrinfo' struct in the DNS cache. - * - * When calling Curl_resolv() has resulted in a response with a returned - * address, we call this function to store the information in the dns - * cache etc - * - * Returns the Curl_dns_entry entry pointer or NULL if the storage failed. - */ -struct Curl_dns_entry * -Curl_cache_addr(struct SessionHandle *data, - Curl_addrinfo *addr, - const char *hostname, - int port) -{ - char *entry_id; - size_t entry_len; - struct Curl_dns_entry *dns; - struct Curl_dns_entry *dns2; - - /* Create an entry id, based upon the hostname and port */ - entry_id = create_hostcache_id(hostname, port); - /* If we can't create the entry id, fail */ - if(!entry_id) - return NULL; - entry_len = strlen(entry_id); - - /* Create a new cache entry */ - dns = calloc(1, sizeof(struct Curl_dns_entry)); - if(!dns) { - free(entry_id); - return NULL; - } - - dns->inuse = 0; /* init to not used */ - dns->addr = addr; /* this is the address(es) */ - time(&dns->timestamp); - if(dns->timestamp == 0) - dns->timestamp = 1; /* zero indicates that entry isn't in hash table */ - - /* Store the resolved data in our DNS cache. */ - dns2 = Curl_hash_add(data->dns.hostcache, entry_id, entry_len+1, - (void *)dns); - if(!dns2) { - free(dns); - free(entry_id); - return NULL; - } - - dns = dns2; - dns->inuse++; /* mark entry as in-use */ - - /* free the allocated entry_id */ - free(entry_id); - - return dns; -} - -/* - * Curl_resolv() is the main name resolve function within libcurl. It resolves - * a name and returns a pointer to the entry in the 'entry' argument (if one - * is provided). This function might return immediately if we're using asynch - * resolves. See the return codes. - * - * The cache entry we return will get its 'inuse' counter increased when this - * function is used. You MUST call Curl_resolv_unlock() later (when you're - * done using this struct) to decrease the counter again. - * - * In debug mode, we specifically test for an interface name "LocalHost" - * and resolve "localhost" instead as a means to permit test cases - * to connect to a local test server with any host name. - * - * Return codes: - * - * CURLRESOLV_ERROR (-1) = error, no pointer - * CURLRESOLV_RESOLVED (0) = OK, pointer provided - * CURLRESOLV_PENDING (1) = waiting for response, no pointer - */ - -int Curl_resolv(struct connectdata *conn, - const char *hostname, - int port, - struct Curl_dns_entry **entry) -{ - struct Curl_dns_entry *dns = NULL; - struct SessionHandle *data = conn->data; - CURLcode result; - int stale, rc = CURLRESOLV_ERROR; /* default to failure */ - - *entry = NULL; - - if(data->share) - Curl_share_lock(data, CURL_LOCK_DATA_DNS, CURL_LOCK_ACCESS_SINGLE); - - dns = Curl_fetch_addr(conn, hostname, port, &stale); - - infof(data, "Hostname was %sfound in DNS cache\n", dns||stale?"":"NOT "); - if(stale) - infof(data, "Hostname in DNS cache was stale, zapped\n"); - - - if(dns) { - dns->inuse++; /* we use it! */ - rc = CURLRESOLV_RESOLVED; - } - - if(data->share) - Curl_share_unlock(data, CURL_LOCK_DATA_DNS); - - if(!dns) { - /* The entry was not in the cache. Resolve it to IP address */ - - Curl_addrinfo *addr; - int respwait; - - /* Check what IP specifics the app has requested and if we can provide it. - * If not, bail out. */ - if(!Curl_ipvalid(conn)) - return CURLRESOLV_ERROR; - - /* If Curl_getaddrinfo() returns NULL, 'respwait' might be set to a - non-zero value indicating that we need to wait for the response to the - resolve call */ - addr = Curl_getaddrinfo(conn, -#ifdef DEBUGBUILD - (data->set.str[STRING_DEVICE] - && !strcmp(data->set.str[STRING_DEVICE], - "LocalHost"))?"localhost": -#endif - hostname, port, &respwait); - - if(!addr) { - if(respwait) { - /* the response to our resolve call will come asynchronously at - a later time, good or bad */ - /* First, check that we haven't received the info by now */ - result = Curl_resolver_is_resolved(conn, &dns); - if(result) /* error detected */ - return CURLRESOLV_ERROR; - if(dns) - rc = CURLRESOLV_RESOLVED; /* pointer provided */ - else - rc = CURLRESOLV_PENDING; /* no info yet */ - } - } - else { - if(data->share) - Curl_share_lock(data, CURL_LOCK_DATA_DNS, CURL_LOCK_ACCESS_SINGLE); - - /* we got a response, store it in the cache */ - dns = Curl_cache_addr(data, addr, hostname, port); - - if(data->share) - Curl_share_unlock(data, CURL_LOCK_DATA_DNS); - - if(!dns) - /* returned failure, bail out nicely */ - Curl_freeaddrinfo(addr); - else - rc = CURLRESOLV_RESOLVED; - } - } - - *entry = dns; - - return rc; -} - -#ifdef USE_ALARM_TIMEOUT -/* - * This signal handler jumps back into the main libcurl code and continues - * execution. This effectively causes the remainder of the application to run - * within a signal handler which is nonportable and could lead to problems. - */ -static -RETSIGTYPE alarmfunc(int sig) -{ - /* this is for "-ansi -Wall -pedantic" to stop complaining! (rabe) */ - (void)sig; - siglongjmp(curl_jmpenv, 1); - return; -} -#endif /* USE_ALARM_TIMEOUT */ - -/* - * Curl_resolv_timeout() is the same as Curl_resolv() but specifies a - * timeout. This function might return immediately if we're using asynch - * resolves. See the return codes. - * - * The cache entry we return will get its 'inuse' counter increased when this - * function is used. You MUST call Curl_resolv_unlock() later (when you're - * done using this struct) to decrease the counter again. - * - * If built with a synchronous resolver and use of signals is not - * disabled by the application, then a nonzero timeout will cause a - * timeout after the specified number of milliseconds. Otherwise, timeout - * is ignored. - * - * Return codes: - * - * CURLRESOLV_TIMEDOUT(-2) = warning, time too short or previous alarm expired - * CURLRESOLV_ERROR (-1) = error, no pointer - * CURLRESOLV_RESOLVED (0) = OK, pointer provided - * CURLRESOLV_PENDING (1) = waiting for response, no pointer - */ - -int Curl_resolv_timeout(struct connectdata *conn, - const char *hostname, - int port, - struct Curl_dns_entry **entry, - long timeoutms) -{ -#ifdef USE_ALARM_TIMEOUT -#ifdef HAVE_SIGACTION - struct sigaction keep_sigact; /* store the old struct here */ - volatile bool keep_copysig = FALSE; /* wether old sigact has been saved */ - struct sigaction sigact; -#else -#ifdef HAVE_SIGNAL - void (*keep_sigact)(int); /* store the old handler here */ -#endif /* HAVE_SIGNAL */ -#endif /* HAVE_SIGACTION */ - volatile long timeout; - volatile unsigned int prev_alarm = 0; - struct SessionHandle *data = conn->data; -#endif /* USE_ALARM_TIMEOUT */ - int rc; - - *entry = NULL; - - if(timeoutms < 0) - /* got an already expired timeout */ - return CURLRESOLV_TIMEDOUT; - -#ifdef USE_ALARM_TIMEOUT - if(data->set.no_signal) - /* Ignore the timeout when signals are disabled */ - timeout = 0; - else - timeout = timeoutms; - - if(!timeout) - /* USE_ALARM_TIMEOUT defined, but no timeout actually requested */ - return Curl_resolv(conn, hostname, port, entry); - - if(timeout < 1000) - /* The alarm() function only provides integer second resolution, so if - we want to wait less than one second we must bail out already now. */ - return CURLRESOLV_TIMEDOUT; - - /************************************************************* - * Set signal handler to catch SIGALRM - * Store the old value to be able to set it back later! - *************************************************************/ -#ifdef HAVE_SIGACTION - sigaction(SIGALRM, NULL, &sigact); - keep_sigact = sigact; - keep_copysig = TRUE; /* yes, we have a copy */ - sigact.sa_handler = alarmfunc; -#ifdef SA_RESTART - /* HPUX doesn't have SA_RESTART but defaults to that behaviour! */ - sigact.sa_flags &= ~SA_RESTART; -#endif - /* now set the new struct */ - sigaction(SIGALRM, &sigact, NULL); -#else /* HAVE_SIGACTION */ - /* no sigaction(), revert to the much lamer signal() */ -#ifdef HAVE_SIGNAL - keep_sigact = signal(SIGALRM, alarmfunc); -#endif -#endif /* HAVE_SIGACTION */ - - /* alarm() makes a signal get sent when the timeout fires off, and that - will abort system calls */ - prev_alarm = alarm(curlx_sltoui(timeout/1000L)); - - /* This allows us to time-out from the name resolver, as the timeout - will generate a signal and we will siglongjmp() from that here. - This technique has problems (see alarmfunc). - This should be the last thing we do before calling Curl_resolv(), - as otherwise we'd have to worry about variables that get modified - before we invoke Curl_resolv() (and thus use "volatile"). */ - if(sigsetjmp(curl_jmpenv, 1)) { - /* this is coming from a siglongjmp() after an alarm signal */ - failf(data, "name lookup timed out"); - rc = CURLRESOLV_ERROR; - goto clean_up; - } - -#else -#ifndef CURLRES_ASYNCH - if(timeoutms) - infof(conn->data, "timeout on name lookup is not supported\n"); -#else - (void)timeoutms; /* timeoutms not used with an async resolver */ -#endif -#endif /* USE_ALARM_TIMEOUT */ - - /* Perform the actual name resolution. This might be interrupted by an - * alarm if it takes too long. - */ - rc = Curl_resolv(conn, hostname, port, entry); - -#ifdef USE_ALARM_TIMEOUT -clean_up: - - if(!prev_alarm) - /* deactivate a possibly active alarm before uninstalling the handler */ - alarm(0); - -#ifdef HAVE_SIGACTION - if(keep_copysig) { - /* we got a struct as it looked before, now put that one back nice - and clean */ - sigaction(SIGALRM, &keep_sigact, NULL); /* put it back */ - } -#else -#ifdef HAVE_SIGNAL - /* restore the previous SIGALRM handler */ - signal(SIGALRM, keep_sigact); -#endif -#endif /* HAVE_SIGACTION */ - - /* switch back the alarm() to either zero or to what it was before minus - the time we spent until now! */ - if(prev_alarm) { - /* there was an alarm() set before us, now put it back */ - unsigned long elapsed_ms = Curl_tvdiff(Curl_tvnow(), conn->created); - - /* the alarm period is counted in even number of seconds */ - unsigned long alarm_set = prev_alarm - elapsed_ms/1000; - - if(!alarm_set || - ((alarm_set >= 0x80000000) && (prev_alarm < 0x80000000)) ) { - /* if the alarm time-left reached zero or turned "negative" (counted - with unsigned values), we should fire off a SIGALRM here, but we - won't, and zero would be to switch it off so we never set it to - less than 1! */ - alarm(1); - rc = CURLRESOLV_TIMEDOUT; - failf(data, "Previous alarm fired off!"); - } - else - alarm((unsigned int)alarm_set); - } -#endif /* USE_ALARM_TIMEOUT */ - - return rc; -} - -/* - * Curl_resolv_unlock() unlocks the given cached DNS entry. When this has been - * made, the struct may be destroyed due to pruning. It is important that only - * one unlock is made for each Curl_resolv() call. - * - * May be called with 'data' == NULL for global cache. - */ -void Curl_resolv_unlock(struct SessionHandle *data, struct Curl_dns_entry *dns) -{ - DEBUGASSERT(dns && (dns->inuse>0)); - - if(data && data->share) - Curl_share_lock(data, CURL_LOCK_DATA_DNS, CURL_LOCK_ACCESS_SINGLE); - - dns->inuse--; - /* only free if nobody is using AND it is not in hostcache (timestamp == - 0) */ - if(dns->inuse == 0 && dns->timestamp == 0) { - Curl_freeaddrinfo(dns->addr); - free(dns); - } - - if(data && data->share) - Curl_share_unlock(data, CURL_LOCK_DATA_DNS); -} - -/* - * File-internal: free a cache dns entry. - */ -static void freednsentry(void *freethis) -{ - struct Curl_dns_entry *p = (struct Curl_dns_entry *) freethis; - - /* mark the entry as not in hostcache */ - p->timestamp = 0; - if(p->inuse == 0) { - Curl_freeaddrinfo(p->addr); - free(p); - } -} - -/* - * Curl_mk_dnscache() creates a new DNS cache and returns the handle for it. - */ -struct curl_hash *Curl_mk_dnscache(void) -{ - return Curl_hash_alloc(7, Curl_hash_str, Curl_str_key_compare, freednsentry); -} - -static int hostcache_inuse(void *data, void *hc) -{ - struct Curl_dns_entry *c = (struct Curl_dns_entry *) hc; - - if(c->inuse == 1) - Curl_resolv_unlock(data, c); - - return 1; /* free all entries */ -} - -/* - * Curl_hostcache_clean() - * - * This _can_ be called with 'data' == NULL but then of course no locking - * can be done! - */ - -void Curl_hostcache_clean(struct SessionHandle *data, - struct curl_hash *hash) -{ - /* Entries added to the hostcache with the CURLOPT_RESOLVE function are - * still present in the cache with the inuse counter set to 1. Detect them - * and cleanup! - */ - Curl_hash_clean_with_criterium(hash, data, hostcache_inuse); -} - - -CURLcode Curl_loadhostpairs(struct SessionHandle *data) -{ - struct curl_slist *hostp; - char hostname[256]; - char address[256]; - int port; - - for(hostp = data->change.resolve; hostp; hostp = hostp->next ) { - if(!hostp->data) - continue; - if(hostp->data[0] == '-') { - /* TODO: mark an entry for removal */ - } - else if(3 == sscanf(hostp->data, "%255[^:]:%d:%255s", hostname, &port, - address)) { - struct Curl_dns_entry *dns; - Curl_addrinfo *addr; - char *entry_id; - size_t entry_len; - - addr = Curl_str2addr(address, port); - if(!addr) { - infof(data, "Resolve %s found illegal!\n", hostp->data); - continue; - } - - /* Create an entry id, based upon the hostname and port */ - entry_id = create_hostcache_id(hostname, port); - /* If we can't create the entry id, fail */ - if(!entry_id) { - Curl_freeaddrinfo(addr); - return CURLE_OUT_OF_MEMORY; - } - - entry_len = strlen(entry_id); - - if(data->share) - Curl_share_lock(data, CURL_LOCK_DATA_DNS, CURL_LOCK_ACCESS_SINGLE); - - /* See if its already in our dns cache */ - dns = Curl_hash_pick(data->dns.hostcache, entry_id, entry_len+1); - - /* free the allocated entry_id again */ - free(entry_id); - - if(!dns) - /* if not in the cache already, put this host in the cache */ - dns = Curl_cache_addr(data, addr, hostname, port); - else - /* this is a duplicate, free it again */ - Curl_freeaddrinfo(addr); - - if(data->share) - Curl_share_unlock(data, CURL_LOCK_DATA_DNS); - - if(!dns) { - Curl_freeaddrinfo(addr); - return CURLE_OUT_OF_MEMORY; - } - infof(data, "Added %s:%d:%s to DNS cache\n", - hostname, port, address); - } - } - data->change.resolve = NULL; /* dealt with now */ - - return CURLE_OK; -} |