/*
* Torsocks call for getaddrinfo(3).
*/
LIBC_GETADDRINFO_RET_TYPE tsocks_getaddrinfo(LIBC_GETADDRINFO_SIG)
{
int ret, af;
struct in_addr addr4;
struct in6_addr addr6;
void *addr;
char *ip_str, ipv4[INET_ADDRSTRLEN], ipv6[INET6_ADDRSTRLEN];
socklen_t ip_str_size;
const char *node;
DBG("[getaddrinfo] Requesting %s hostname", __node);
if (!__node) {
ret = EAI_NONAME;
goto error;
}
/* Use right domain for the next step. */
switch (__hints->ai_family) {
default:
/* Default value is to use IPv4. */
case AF_INET:
addr = &addr4;
ip_str = ipv4;
ip_str_size = sizeof(ipv4);
af = AF_INET;
break;
case AF_INET6:
addr = &addr6;
ip_str = ipv6;
ip_str_size = sizeof(ipv6);
af = AF_INET6;
break;
}
ret = inet_pton(af, __node, &addr);
if (ret == 0) {
/* The node most probably is a DNS name. */
ret = tsocks_tor_resolve(__node, (uint32_t *) addr);
if (ret < 0) {
ret = EAI_FAIL;
goto error;
}
(void) inet_ntop(af, addr, ip_str, ip_str_size);
node = ip_str;
DBG("[getaddrinfo] Node %s resolved to %s", __node, node);
} else {
node = __node;
DBG("[getaddrinfo] Node %s will be passed to the libc call", node);
}
ret = tsocks_libc_getaddrinfo(node, __service, __hints, __res);
if (ret) {
goto error;
}
return 0;
error:
return ret;
}
/*
* Torsocks call for getaddrinfo(3).
*/
LIBC_GETADDRINFO_RET_TYPE tsocks_getaddrinfo(LIBC_GETADDRINFO_SIG)
{
int ret, af;
struct in_addr addr4;
struct in6_addr addr6;
void *addr;
char *ip_str, ipv4[INET_ADDRSTRLEN], ipv6[INET6_ADDRSTRLEN];
socklen_t ip_str_size;
const char *tmp_node;
DBG("[getaddrinfo] Requesting %s hostname", node);
if (!node) {
/*
* As stated in the man page, if node is NULL, the libc call will
* return a valid socket address but NO external DNS resolution is
* possible since there is no host name to resolve.
*/
tmp_node = node;
goto libc_call;
}
/*
* Quoting the getaddrinfo(3) man page:
*
* All the other fields in the structure pointed to by hints must
* contain either 0 or a NULL pointer, as appropriate. Specifying hints
* as NULL is equivalent to setting ai_socktype and ai_protocol to
* 0; ai_family to AF_UNSPEC; and ai_flags to (AI_V4MAPPED |
* AI_ADDRCONFIG).
*
* This means that for sure the ai_family will be treated as AF_UNSPEC.
*/
if (!hints) {
tmp_node = node;
goto libc_call;
}
/* Use right domain for the next step. */
switch (hints->ai_family) {
default:
/* Default value is to use IPv4. */
case AF_INET:
addr = &addr4;
ip_str = ipv4;
ip_str_size = sizeof(ipv4);
af = AF_INET;
break;
case AF_INET6:
addr = &addr6;
ip_str = ipv6;
ip_str_size = sizeof(ipv6);
af = AF_INET6;
break;
}
ret = inet_pton(af, node, addr);
if (ret == 0) {
/* If AI_NUMERICHOST is set, return a error. */
if (hints->ai_flags & AI_NUMERICHOST) {
ret = EAI_NONAME;
goto error;
}
/* The node most probably is a DNS name. */
ret = tsocks_tor_resolve(af, node, addr);
if (ret < 0) {
ret = EAI_FAIL;
goto error;
}
(void) inet_ntop(af, addr, ip_str, ip_str_size);
tmp_node = ip_str;
DBG("[getaddrinfo] Node %s resolved to %s", node,tmp_node);
} else {
tmp_node = node;
DBG("[getaddrinfo] Node %s will be passed to the libc call", tmp_node);
}
libc_call:
ret = tsocks_libc_getaddrinfo(tmp_node, service, hints, res);
if (ret) {
goto error;
}
return 0;
error:
return ret;
}
