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resolve: add support for IPv6 DNS64/NAT64 Networks on OS X + iOS

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Use getaddrinfo() to resolve the IPv4 address literal on iOS/Mac OS X.
If the current network interface doesn’t support IPv4, but supports
IPv6, NAT64, and DNS64.

Closes #866
Fixes #863
This commit is contained in:
Luo Jinghua 2016-06-07 18:11:37 +08:00 committed by Daniel Stenberg
parent 9b6d3a662e
commit 01a49a7626
5 changed files with 69 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
lib/asyn-thread.c
View File

@ -279,6 +279,9 @@ static unsigned int CURL_STDCALL getaddrinfo_thread (void *arg)
if(tsd->sock_error == 0)
tsd->sock_error = RESOLVER_ENOMEM;
}
else {
Curl_addrinfo_set_port(tsd->res, tsd->port);
}
Curl_mutex_acquire(tsd->mtx);
if(tsd->done) {
@ -602,6 +605,7 @@ Curl_addrinfo *Curl_resolver_getaddrinfo(struct connectdata *conn,
*waitp = 0; /* default to synchronous response */
#ifndef USE_RESOLVE_ON_IPS
/* First check if this is an IPv4 address string */
if(Curl_inet_pton(AF_INET, hostname, &in) > 0)
/* This is a dotted IP address 123.123.123.123-style */
@ -609,7 +613,7 @@ Curl_addrinfo *Curl_resolver_getaddrinfo(struct connectdata *conn,
#ifdef CURLRES_IPV6
/* check if this is an IPv6 address string */
if(Curl_inet_pton (AF_INET6, hostname, &in6) > 0)
if(Curl_inet_pton(AF_INET6, hostname, &in6) > 0)
/* This is an IPv6 address literal */
return Curl_ip2addr(AF_INET6, &in6, hostname, port);
@ -633,6 +637,7 @@ Curl_addrinfo *Curl_resolver_getaddrinfo(struct connectdata *conn,
pf = PF_INET;
#endif /* CURLRES_IPV6 */
#endif /* USE_RESOLVE_ON_IPS */
memset(&hints, 0, sizeof(hints));
hints.ai_family = pf;
@ -656,6 +661,10 @@ Curl_addrinfo *Curl_resolver_getaddrinfo(struct connectdata *conn,
hostname, port, Curl_strerror(conn, SOCKERRNO));
return NULL;
}
else {
Curl_addrinfo_set_port(res, port);
}
return res;
}

29
lib/curl_addrinfo.c
View File

@ -563,3 +563,32 @@ curl_dogetaddrinfo(const char *hostname,
}
#endif /* defined(CURLDEBUG) && defined(HAVE_GETADDRINFO) */
#if defined(HAVE_GETADDRINFO) && defined(USE_RESOLVE_ON_IPS)
/*
* Work-arounds the sin6_port is always zero bug on iOS 9.3.2 and Mac OS X
* 10.11.5.
*/
void Curl_addrinfo_set_port(Curl_addrinfo *addrinfo, int port)
{
Curl_addrinfo *ca;
struct sockaddr_in *addr;
#ifdef ENABLE_IPV6
struct sockaddr_in6 *addr6;
#endif
for(ca = addrinfo; ca != NULL; ca = ca->ai_next) {
switch (ca->ai_family) {
case AF_INET:
addr = (void *)ca->ai_addr; /* storage area for this info */
addr->sin_port = htons((unsigned short)port);
break;
#ifdef ENABLE_IPV6
case AF_INET6:
addr6 = (void *)ca->ai_addr; /* storage area for this info */
addr6->sin6_port = htons((unsigned short)port);
break;
#endif
}
}
}
#endif

10
lib/curl_addrinfo.h
View File

@ -7,7 +7,7 @@
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al.
* Copyright (C) 1998 - 2016, 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
@ -99,4 +99,12 @@ curl_dogetaddrinfo(const char *hostname,
int line, const char *source);
#endif
#ifdef HAVE_GETADDRINFO
#ifdef USE_RESOLVE_ON_IPS
void Curl_addrinfo_set_port(Curl_addrinfo *addrinfo, int port);
#else
#define Curl_addrinfo_set_port(x,y)
#endif
#endif
#endif /* HEADER_CURL_ADDRINFO_H */

9
lib/curl_setup.h
View File

@ -221,6 +221,15 @@
# include "setup-vms.h"
#endif
/*
* Use getaddrinfo to resolve the IPv4 address literal. If the current network
* interface doesn’t support IPv4, but supports IPv6, NAT64, and DNS64,
* performing this task will result in a synthesized IPv6 address.
*/
#ifdef __APPLE__
#define USE_RESOLVE_ON_IPS 1
#endif
/*
* Include header files for windows builds before redefining anything.
* Use this preprocessor block only to include or exclude windows.h,

12
lib/hostip6.c
View File

@ -167,7 +167,9 @@ Curl_addrinfo *Curl_getaddrinfo(struct connectdata *conn,
int error;
char sbuf[12];
char *sbufptr = NULL;
#ifndef USE_RESOLVE_ON_IPS
char addrbuf[128];
#endif
int pf;
#if !defined(CURL_DISABLE_VERBOSE_STRINGS)
struct SessionHandle *data = conn->data;
@ -196,11 +198,17 @@ Curl_addrinfo *Curl_getaddrinfo(struct connectdata *conn,
hints.ai_family = pf;
hints.ai_socktype = conn->socktype;
#ifndef USE_RESOLVE_ON_IPS
/*
* The AI_NUMERICHOST must not be set to get synthesized IPv6 address from
* an IPv4 address on iOS and Mac OS X.
*/
if((1 == Curl_inet_pton(AF_INET, hostname, addrbuf)) ||
(1 == Curl_inet_pton(AF_INET6, hostname, addrbuf))) {
/* the given address is numerical only, prevent a reverse lookup */
hints.ai_flags = AI_NUMERICHOST;
}
#endif
if(port) {
snprintf(sbuf, sizeof(sbuf), "%d", port);
@ -213,6 +221,10 @@ Curl_addrinfo *Curl_getaddrinfo(struct connectdata *conn,
return NULL;
}
if(port) {
Curl_addrinfo_set_port(res, port);
}
dump_addrinfo(conn, res);
return res;