mirror of
https://github.com/moparisthebest/curl
synced 2024-12-23 16:48:49 -05:00
hostip: move code to resolve IP address literals to Curl_resolv
The code was duplicated in the various resolver backends. Also, it was called after the call to `Curl_ipvalid`, which matters in case of `CURLRES_IPV4` when called from `connect.c:bindlocal`. This caused test 1048 to fail on classic MinGW. The code ignores `conn->ip_version` as done previously in the individual resolver backends. Move the call to the `resolver_start` callback up to appease test 655, which wants it to be called also for literal addresses. Closes https://github.com/curl/curl/pull/4798
This commit is contained in:
Marcel Raad
parent
062eaa63b5
commit
875314ed0b
@ -626,26 +626,11 @@ Curl_addrinfo *Curl_resolver_getaddrinfo(struct connectdata *conn,
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{
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char *bufp;
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struct Curl_easy *data = conn->data;
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struct in_addr in;
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int family = PF_INET;
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#ifdef ENABLE_IPV6 /* CURLRES_IPV6 */
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struct in6_addr in6;
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#endif /* CURLRES_IPV6 */
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*waitp = 0; /* default to synchronous response */
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/* First check if this is an IPv4 address string */
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if(Curl_inet_pton(AF_INET, hostname, &in) > 0) {
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/* This is a dotted IP address 123.123.123.123-style */
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return Curl_ip2addr(AF_INET, &in, hostname, port);
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}
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#ifdef ENABLE_IPV6 /* CURLRES_IPV6 */
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/* Otherwise, check if this is an IPv6 address string */
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if(Curl_inet_pton (AF_INET6, hostname, &in6) > 0)
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/* This must be an IPv6 address literal. */
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return Curl_ip2addr(AF_INET6, &in6, hostname, port);
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switch(conn->ip_version) {
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default:
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#if ARES_VERSION >= 0x010601
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@ -71,7 +71,6 @@
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#include "strerror.h"
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#include "url.h"
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#include "multiif.h"
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#include "inet_pton.h"
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#include "inet_ntop.h"
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#include "curl_threads.h"
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#include "connect.h"
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@ -692,26 +691,11 @@ Curl_addrinfo *Curl_resolver_getaddrinfo(struct connectdata *conn,
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int port,
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int *waitp)
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{
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struct in_addr in;
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struct Curl_easy *data = conn->data;
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struct resdata *reslv = (struct resdata *)data->state.resolver;
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*waitp = 0; /* default to synchronous response */
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#ifdef ENABLE_IPV6
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{
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struct in6_addr in6;
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/* check if this is an IPv6 address string */
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if(Curl_inet_pton(AF_INET6, hostname, &in6) > 0)
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/* This is an IPv6 address literal */
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return Curl_ip2addr(AF_INET6, &in6, hostname, port);
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}
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#endif /* ENABLE_IPV6 */
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if(Curl_inet_pton(AF_INET, hostname, &in) > 0)
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/* This is a dotted IP address 123.123.123.123-style */
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return Curl_ip2addr(AF_INET, &in, hostname, port);
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reslv->start = Curl_now();
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/* fire up a new resolver thread! */
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@ -743,25 +727,6 @@ Curl_addrinfo *Curl_resolver_getaddrinfo(struct connectdata *conn,
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*waitp = 0; /* default to synchronous response */
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#ifndef USE_RESOLVE_ON_IPS
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{
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struct in_addr in;
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/* First check if this is an IPv4 address string */
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if(Curl_inet_pton(AF_INET, hostname, &in) > 0)
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/* This is a dotted IP address 123.123.123.123-style */
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return Curl_ip2addr(AF_INET, &in, hostname, port);
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}
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#ifdef ENABLE_IPV6
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{
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struct in6_addr in6;
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/* check if this is an IPv6 address string */
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if(Curl_inet_pton(AF_INET6, hostname, &in6) > 0)
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/* This is an IPv6 address literal */
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return Curl_ip2addr(AF_INET6, &in6, hostname, port);
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}
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#endif /* ENABLE_IPV6 */
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#endif /* !USE_RESOLVE_ON_IPS */
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#ifdef CURLRES_IPV6
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/*
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* Check if a limited name resolve has been requested.
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56
lib/hostip.c
56
lib/hostip.c
@ -59,6 +59,7 @@
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#include "strerror.h"
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#include "url.h"
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#include "inet_ntop.h"
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#include "inet_pton.h"
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#include "multiif.h"
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#include "doh.h"
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#include "warnless.h"
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@ -512,13 +513,11 @@ int Curl_resolv(struct connectdata *conn,
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if(!dns) {
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/* The entry was not in the cache. Resolve it to IP address */
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Curl_addrinfo *addr;
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Curl_addrinfo *addr = NULL;
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int respwait = 0;
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/* Check what IP specifics the app has requested and if we can provide it.
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* If not, bail out. */
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if(!Curl_ipvalid(conn))
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return CURLRESOLV_ERROR;
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#ifndef USE_RESOLVE_ON_IPS
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struct in_addr in;
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#endif
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/* notify the resolver start callback */
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if(data->set.resolver_start) {
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@ -531,20 +530,43 @@ int Curl_resolv(struct connectdata *conn,
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return CURLRESOLV_ERROR;
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}
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if(allowDOH && data->set.doh) {
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addr = Curl_doh(conn, hostname, port, &respwait);
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#ifndef USE_RESOLVE_ON_IPS
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/* First check if this is an IPv4 address string */
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if(Curl_inet_pton(AF_INET, hostname, &in) > 0)
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/* This is a dotted IP address 123.123.123.123-style */
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addr = Curl_ip2addr(AF_INET, &in, hostname, port);
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#ifdef ENABLE_IPV6
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if(!addr) {
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struct in6_addr in6;
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/* check if this is an IPv6 address string */
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if(Curl_inet_pton(AF_INET6, hostname, &in6) > 0)
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/* This is an IPv6 address literal */
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addr = Curl_ip2addr(AF_INET6, &in6, hostname, port);
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}
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else {
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/* If Curl_getaddrinfo() returns NULL, 'respwait' might be set to a
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non-zero value indicating that we need to wait for the response to the
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resolve call */
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addr = Curl_getaddrinfo(conn,
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#endif /* ENABLE_IPV6 */
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#endif /* !USE_RESOLVE_ON_IPS */
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if(!addr) {
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/* Check what IP specifics the app has requested and if we can provide
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* it. If not, bail out. */
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if(!Curl_ipvalid(conn))
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return CURLRESOLV_ERROR;
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if(allowDOH && data->set.doh) {
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addr = Curl_doh(conn, hostname, port, &respwait);
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}
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else {
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/* If Curl_getaddrinfo() returns NULL, 'respwait' might be set to a
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non-zero value indicating that we need to wait for the response to
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the resolve call */
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addr = Curl_getaddrinfo(conn,
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#ifdef DEBUGBUILD
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(data->set.str[STRING_DEVICE]
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&& !strcmp(data->set.str[STRING_DEVICE],
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"LocalHost"))?"localhost":
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(data->set.str[STRING_DEVICE]
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&& !strcmp(data->set.str[STRING_DEVICE],
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"LocalHost"))?"localhost":
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#endif
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hostname, port, &respwait);
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hostname, port, &respwait);
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}
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}
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if(!addr) {
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if(respwait) {
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300
lib/hostip4.c
300
lib/hostip4.c
@ -52,7 +52,6 @@
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#include "share.h"
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#include "strerror.h"
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#include "url.h"
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#include "inet_pton.h"
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/* The last 3 #include files should be in this order */
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#include "curl_printf.h"
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#include "curl_memory.h"
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@ -128,38 +127,22 @@ Curl_addrinfo *Curl_ipv4_resolve_r(const char *hostname,
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#endif
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Curl_addrinfo *ai = NULL;
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struct hostent *h = NULL;
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struct in_addr in;
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struct hostent *buf = NULL;
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#ifdef ENABLE_IPV6
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{
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struct in6_addr in6;
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/* check if this is an IPv6 address string */
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if(Curl_inet_pton(AF_INET6, hostname, &in6) > 0)
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/* This is an IPv6 address literal */
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return Curl_ip2addr(AF_INET6, &in6, hostname, port);
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}
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#endif /* ENABLE_IPV6 */
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if(Curl_inet_pton(AF_INET, hostname, &in) > 0)
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/* This is a dotted IP address 123.123.123.123-style */
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return Curl_ip2addr(AF_INET, &in, hostname, port);
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#if defined(HAVE_GETADDRINFO_THREADSAFE)
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else {
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struct addrinfo hints;
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char sbuf[12];
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char *sbufptr = NULL;
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struct addrinfo hints;
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char sbuf[12];
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char *sbufptr = NULL;
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memset(&hints, 0, sizeof(hints));
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hints.ai_family = PF_INET;
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hints.ai_socktype = SOCK_STREAM;
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if(port) {
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msnprintf(sbuf, sizeof(sbuf), "%d", port);
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sbufptr = sbuf;
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}
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memset(&hints, 0, sizeof(hints));
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hints.ai_family = PF_INET;
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hints.ai_socktype = SOCK_STREAM;
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if(port) {
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msnprintf(sbuf, sizeof(sbuf), "%d", port);
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sbufptr = sbuf;
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}
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(void)Curl_getaddrinfo_ex(hostname, sbufptr, &hints, &ai);
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(void)Curl_getaddrinfo_ex(hostname, sbufptr, &hints, &ai);
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#elif defined(HAVE_GETHOSTBYNAME_R)
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/*
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@ -167,144 +150,141 @@ Curl_addrinfo *Curl_ipv4_resolve_r(const char *hostname,
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* Since there are three different versions of it, the following code is
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* somewhat #ifdef-ridden.
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*/
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else {
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int h_errnop;
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int h_errnop;
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buf = calloc(1, CURL_HOSTENT_SIZE);
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if(!buf)
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return NULL; /* major failure */
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/*
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* The clearing of the buffer is a workaround for a gethostbyname_r bug in
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* qnx nto and it is also _required_ for some of these functions on some
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* platforms.
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*/
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buf = calloc(1, CURL_HOSTENT_SIZE);
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if(!buf)
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return NULL; /* major failure */
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/*
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* The clearing of the buffer is a workaround for a gethostbyname_r bug in
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* qnx nto and it is also _required_ for some of these functions on some
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* platforms.
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*/
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#if defined(HAVE_GETHOSTBYNAME_R_5)
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/* Solaris, IRIX and more */
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h = gethostbyname_r(hostname,
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(struct hostent *)buf,
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(char *)buf + sizeof(struct hostent),
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CURL_HOSTENT_SIZE - sizeof(struct hostent),
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&h_errnop);
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/* Solaris, IRIX and more */
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h = gethostbyname_r(hostname,
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(struct hostent *)buf,
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(char *)buf + sizeof(struct hostent),
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CURL_HOSTENT_SIZE - sizeof(struct hostent),
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&h_errnop);
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/* If the buffer is too small, it returns NULL and sets errno to
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* ERANGE. The errno is thread safe if this is compiled with
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* -D_REENTRANT as then the 'errno' variable is a macro defined to get
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* used properly for threads.
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*/
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/* If the buffer is too small, it returns NULL and sets errno to
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* ERANGE. The errno is thread safe if this is compiled with
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* -D_REENTRANT as then the 'errno' variable is a macro defined to get
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* used properly for threads.
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*/
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if(h) {
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;
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}
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else
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#elif defined(HAVE_GETHOSTBYNAME_R_6)
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/* Linux */
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(void)gethostbyname_r(hostname,
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(struct hostent *)buf,
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(char *)buf + sizeof(struct hostent),
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CURL_HOSTENT_SIZE - sizeof(struct hostent),
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&h, /* DIFFERENCE */
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&h_errnop);
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/* Redhat 8, using glibc 2.2.93 changed the behavior. Now all of a
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* sudden this function returns EAGAIN if the given buffer size is too
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* small. Previous versions are known to return ERANGE for the same
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* problem.
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*
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* This wouldn't be such a big problem if older versions wouldn't
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* sometimes return EAGAIN on a common failure case. Alas, we can't
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* assume that EAGAIN *or* ERANGE means ERANGE for any given version of
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* glibc.
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*
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* For now, we do that and thus we may call the function repeatedly and
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* fail for older glibc versions that return EAGAIN, until we run out of
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* buffer size (step_size grows beyond CURL_HOSTENT_SIZE).
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*
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* If anyone has a better fix, please tell us!
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*
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* -------------------------------------------------------------------
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*
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* On October 23rd 2003, Dan C dug up more details on the mysteries of
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* gethostbyname_r() in glibc:
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*
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* In glibc 2.2.5 the interface is different (this has also been
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* discovered in glibc 2.1.1-6 as shipped by Redhat 6). What I can't
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* explain, is that tests performed on glibc 2.2.4-34 and 2.2.4-32
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* (shipped/upgraded by Redhat 7.2) don't show this behavior!
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*
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* In this "buggy" version, the return code is -1 on error and 'errno'
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* is set to the ERANGE or EAGAIN code. Note that 'errno' is not a
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* thread-safe variable.
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*/
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if(!h) /* failure */
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#elif defined(HAVE_GETHOSTBYNAME_R_3)
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/* AIX, Digital Unix/Tru64, HPUX 10, more? */
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/* For AIX 4.3 or later, we don't use gethostbyname_r() at all, because of
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* the plain fact that it does not return unique full buffers on each
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* call, but instead several of the pointers in the hostent structs will
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* point to the same actual data! This have the unfortunate down-side that
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* our caching system breaks down horribly. Luckily for us though, AIX 4.3
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* and more recent versions have a "completely thread-safe"[*] libc where
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* all the data is stored in thread-specific memory areas making calls to
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* the plain old gethostbyname() work fine even for multi-threaded
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* programs.
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*
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* This AIX 4.3 or later detection is all made in the configure script.
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*
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* Troels Walsted Hansen helped us work this out on March 3rd, 2003.
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*
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* [*] = much later we've found out that it isn't at all "completely
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* thread-safe", but at least the gethostbyname() function is.
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*/
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if(CURL_HOSTENT_SIZE >=
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(sizeof(struct hostent) + sizeof(struct hostent_data))) {
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/* August 22nd, 2000: Albert Chin-A-Young brought an updated version
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* that should work! September 20: Richard Prescott worked on the buffer
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* size dilemma.
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*/
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res = gethostbyname_r(hostname,
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(struct hostent *)buf,
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(struct hostent_data *)((char *)buf +
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sizeof(struct hostent)));
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h_errnop = SOCKERRNO; /* we don't deal with this, but set it anyway */
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}
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else
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res = -1; /* failure, too smallish buffer size */
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if(!res) { /* success */
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h = buf; /* result expected in h */
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/* This is the worst kind of the different gethostbyname_r() interfaces.
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* Since we don't know how big buffer this particular lookup required,
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* we can't realloc down the huge alloc without doing closer analysis of
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* the returned data. Thus, we always use CURL_HOSTENT_SIZE for every
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* name lookup. Fixing this would require an extra malloc() and then
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* calling Curl_addrinfo_copy() that subsequent realloc()s down the new
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* memory area to the actually used amount.
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*/
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}
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else
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#endif /* HAVE_...BYNAME_R_5 || HAVE_...BYNAME_R_6 || HAVE_...BYNAME_R_3 */
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{
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h = NULL; /* set return code to NULL */
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free(buf);
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}
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#else /* HAVE_GETADDRINFO_THREADSAFE || HAVE_GETHOSTBYNAME_R */
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/*
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* Here is code for platforms that don't have a thread safe
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* getaddrinfo() nor gethostbyname_r() function or for which
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* gethostbyname() is the preferred one.
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*/
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else {
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h = gethostbyname((void *)hostname);
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#endif /* HAVE_GETADDRINFO_THREADSAFE || HAVE_GETHOSTBYNAME_R */
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if(h) {
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;
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}
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else
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#elif defined(HAVE_GETHOSTBYNAME_R_6)
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/* Linux */
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(void)gethostbyname_r(hostname,
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(struct hostent *)buf,
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(char *)buf + sizeof(struct hostent),
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CURL_HOSTENT_SIZE - sizeof(struct hostent),
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&h, /* DIFFERENCE */
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&h_errnop);
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/* Redhat 8, using glibc 2.2.93 changed the behavior. Now all of a
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* sudden this function returns EAGAIN if the given buffer size is too
|
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* small. Previous versions are known to return ERANGE for the same
|
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* problem.
|
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*
|
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* This wouldn't be such a big problem if older versions wouldn't
|
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* sometimes return EAGAIN on a common failure case. Alas, we can't
|
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* assume that EAGAIN *or* ERANGE means ERANGE for any given version of
|
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* glibc.
|
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*
|
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* For now, we do that and thus we may call the function repeatedly and
|
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* fail for older glibc versions that return EAGAIN, until we run out of
|
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* buffer size (step_size grows beyond CURL_HOSTENT_SIZE).
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*
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* If anyone has a better fix, please tell us!
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*
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* -------------------------------------------------------------------
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*
|
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* On October 23rd 2003, Dan C dug up more details on the mysteries of
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* gethostbyname_r() in glibc:
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*
|
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* In glibc 2.2.5 the interface is different (this has also been
|
||||
* discovered in glibc 2.1.1-6 as shipped by Redhat 6). What I can't
|
||||
* explain, is that tests performed on glibc 2.2.4-34 and 2.2.4-32
|
||||
* (shipped/upgraded by Redhat 7.2) don't show this behavior!
|
||||
*
|
||||
* In this "buggy" version, the return code is -1 on error and 'errno'
|
||||
* is set to the ERANGE or EAGAIN code. Note that 'errno' is not a
|
||||
* thread-safe variable.
|
||||
*/
|
||||
|
||||
if(!h) /* failure */
|
||||
#elif defined(HAVE_GETHOSTBYNAME_R_3)
|
||||
/* AIX, Digital Unix/Tru64, HPUX 10, more? */
|
||||
|
||||
/* For AIX 4.3 or later, we don't use gethostbyname_r() at all, because of
|
||||
* the plain fact that it does not return unique full buffers on each
|
||||
* call, but instead several of the pointers in the hostent structs will
|
||||
* point to the same actual data! This have the unfortunate down-side that
|
||||
* our caching system breaks down horribly. Luckily for us though, AIX 4.3
|
||||
* and more recent versions have a "completely thread-safe"[*] libc where
|
||||
* all the data is stored in thread-specific memory areas making calls to
|
||||
* the plain old gethostbyname() work fine even for multi-threaded
|
||||
* programs.
|
||||
*
|
||||
* This AIX 4.3 or later detection is all made in the configure script.
|
||||
*
|
||||
* Troels Walsted Hansen helped us work this out on March 3rd, 2003.
|
||||
*
|
||||
* [*] = much later we've found out that it isn't at all "completely
|
||||
* thread-safe", but at least the gethostbyname() function is.
|
||||
*/
|
||||
|
||||
if(CURL_HOSTENT_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.
|
||||
*/
|
||||
|
||||
res = gethostbyname_r(hostname,
|
||||
(struct hostent *)buf,
|
||||
(struct hostent_data *)((char *)buf +
|
||||
sizeof(struct hostent)));
|
||||
h_errnop = SOCKERRNO; /* we don't deal with this, but set it anyway */
|
||||
}
|
||||
else
|
||||
res = -1; /* failure, too smallish buffer size */
|
||||
|
||||
if(!res) { /* success */
|
||||
|
||||
h = buf; /* result expected in h */
|
||||
|
||||
/* This is the worst kind of the different gethostbyname_r() interfaces.
|
||||
* Since we don't know how big buffer this particular lookup required,
|
||||
* we can't realloc down the huge alloc without doing closer analysis of
|
||||
* the returned data. Thus, we always use CURL_HOSTENT_SIZE for every
|
||||
* name lookup. Fixing this would require an extra malloc() and then
|
||||
* calling Curl_addrinfo_copy() that subsequent realloc()s down the new
|
||||
* memory area to the actually used amount.
|
||||
*/
|
||||
}
|
||||
else
|
||||
#endif /* HAVE_...BYNAME_R_5 || HAVE_...BYNAME_R_6 || HAVE_...BYNAME_R_3 */
|
||||
{
|
||||
h = NULL; /* set return code to NULL */
|
||||
free(buf);
|
||||
}
|
||||
#else /* HAVE_GETADDRINFO_THREADSAFE || HAVE_GETHOSTBYNAME_R */
|
||||
/*
|
||||
* Here is code for platforms that don't have a thread safe
|
||||
* getaddrinfo() nor gethostbyname_r() function or for which
|
||||
* gethostbyname() is the preferred one.
|
||||
*/
|
||||
h = gethostbyname((void *)hostname);
|
||||
#endif /* HAVE_GETADDRINFO_THREADSAFE || HAVE_GETHOSTBYNAME_R */
|
||||
|
||||
if(h) {
|
||||
ai = Curl_he2ai(h, port);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user