/*
* Curl_getaddrinfo() when built ipv6-enabled (non-threading and
* non-ares version).
*
* Returns name information about the given hostname and port number. If
* successful, the 'addrinfo' is returned and the forth argument will point to
* memory we need to free after use. That memory *MUST* be freed with
* Curl_freeaddrinfo(), nothing else.
*/
Curl_addrinfo *Curl_getaddrinfo(struct connectdata *conn,
const char *hostname,
int port,
int *waitp)
{
struct addrinfo hints;
Curl_addrinfo *res;
int error;
char sbuf[12];
char *sbufptr = NULL;
char addrbuf[128];
int pf;
struct SessionHandle *data = conn->data;
*waitp = 0; /* synchronous response only */
/*
* Check if a limited name resolve has been requested.
*/
switch(conn->ip_version) {
case CURL_IPRESOLVE_V4:
pf = PF_INET;
break;
case CURL_IPRESOLVE_V6:
pf = PF_INET6;
break;
default:
pf = PF_UNSPEC;
break;
}
if((pf != PF_INET) && !Curl_ipv6works())
/* the stack seems to be a non-ipv6 one */
pf = PF_INET;
memset(&hints, 0, sizeof(hints));
hints.ai_family = pf;
hints.ai_socktype = conn->socktype;
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;
}
if(port) {
snprintf(sbuf, sizeof(sbuf), "%d", port);
sbufptr=sbuf;
}
error = Curl_getaddrinfo_ex(hostname, sbufptr, &hints, &res);
if(error) {
infof(data, "getaddrinfo(3) failed for %s:%d\n", hostname, port);
return NULL;
}
dump_addrinfo(conn, res);
return res;
}
/*
* Curl_resolver_getaddrinfo() - when using ares
*
* Returns name information about the given hostname and port number. If
* successful, the 'hostent' is returned and the forth argument will point to
* memory we need to free after use. That memory *MUST* be freed with
* Curl_freeaddrinfo(), nothing else.
*/
Curl_addrinfo *Curl_resolver_getaddrinfo(struct connectdata *conn,
const char *hostname,
int port,
int *waitp)
{
char *bufp;
struct SessionHandle *data = conn->data;
struct in_addr in;
int family = PF_INET;
#ifdef ENABLE_IPV6 /* CURLRES_IPV6 */
struct in6_addr in6;
#endif /* CURLRES_IPV6 */
*waitp = 0; /* default to synchronous response */
/* 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 */
return Curl_ip2addr(AF_INET, &in, hostname, port);
}
#ifdef ENABLE_IPV6 /* CURLRES_IPV6 */
/* Otherwise, check if this is an IPv6 address string */
if(Curl_inet_pton (AF_INET6, hostname, &in6) > 0)
/* This must be an IPv6 address literal. */
return Curl_ip2addr(AF_INET6, &in6, hostname, port);
switch(conn->ip_version) {
default:
#if ARES_VERSION >= 0x010601
family = PF_UNSPEC; /* supported by c-ares since 1.6.1, so for older
c-ares versions this just falls through and defaults
to PF_INET */
break;
#endif
case CURL_IPRESOLVE_V4:
family = PF_INET;
break;
case CURL_IPRESOLVE_V6:
family = PF_INET6;
break;
}
#endif /* CURLRES_IPV6 */
bufp = strdup(hostname);
if(bufp) {
struct ResolverResults *res = NULL;
Curl_safefree(conn->async.hostname);
conn->async.hostname = bufp;
conn->async.port = port;
conn->async.done = FALSE; /* not done */
conn->async.status = 0; /* clear */
conn->async.dns = NULL; /* clear */
res = calloc(sizeof(struct ResolverResults),1);
if(!res) {
Curl_safefree(conn->async.hostname);
conn->async.hostname = NULL;
return NULL;
}
conn->async.os_specific = res;
/* initial status - failed */
res->last_status = ARES_ENOTFOUND;
#ifdef ENABLE_IPV6 /* CURLRES_IPV6 */
if(family == PF_UNSPEC) {
if(Curl_ipv6works()) {
res->num_pending = 2;
/* areschannel is already setup in the Curl_open() function */
ares_gethostbyname((ares_channel)data->state.resolver, hostname,
PF_INET, query_completed_cb, conn);
ares_gethostbyname((ares_channel)data->state.resolver, hostname,
PF_INET6, query_completed_cb, conn);
}
else {
res->num_pending = 1;
/* areschannel is already setup in the Curl_open() function */
ares_gethostbyname((ares_channel)data->state.resolver, hostname,
PF_INET, query_completed_cb, conn);
}
}
else
#endif /* CURLRES_IPV6 */
{
res->num_pending = 1;
/* areschannel is already setup in the Curl_open() function */
ares_gethostbyname((ares_channel)data->state.resolver, hostname, family,
query_completed_cb, conn);
}
*waitp = 1; /* expect asynchronous response */
}
return NULL; /* no struct yet */
}
/**
* curl_global_init() globally initializes cURL given a bitwise set of the
* different features of what to initialize.
*/
static CURLcode global_init(long flags, bool memoryfuncs)
{
if(initialized++)
return CURLE_OK;
if(memoryfuncs) {
/* Setup the default memory functions here (again) */
Curl_cmalloc = (curl_malloc_callback)malloc;
Curl_cfree = (curl_free_callback)free;
Curl_crealloc = (curl_realloc_callback)realloc;
Curl_cstrdup = (curl_strdup_callback)system_strdup;
Curl_ccalloc = (curl_calloc_callback)calloc;
#if defined(WIN32) && defined(UNICODE)
Curl_cwcsdup = (curl_wcsdup_callback)_wcsdup;
#endif
}
if(flags & CURL_GLOBAL_SSL)
if(!Curl_ssl_init()) {
DEBUGF(fprintf(stderr, "Error: Curl_ssl_init failed\n"));
return CURLE_FAILED_INIT;
}
if(flags & CURL_GLOBAL_WIN32)
if(win32_init()) {
DEBUGF(fprintf(stderr, "Error: win32_init failed\n"));
return CURLE_FAILED_INIT;
}
#ifdef __AMIGA__
if(!Curl_amiga_init()) {
DEBUGF(fprintf(stderr, "Error: Curl_amiga_init failed\n"));
return CURLE_FAILED_INIT;
}
#endif
#ifdef NETWARE
if(netware_init()) {
DEBUGF(fprintf(stderr, "Warning: LONG namespace not available\n"));
}
#endif
#ifdef USE_LIBIDN
idna_init();
#endif
if(Curl_resolver_global_init()) {
DEBUGF(fprintf(stderr, "Error: resolver_global_init failed\n"));
return CURLE_FAILED_INIT;
}
(void)Curl_ipv6works();
#if defined(USE_LIBSSH2) && defined(HAVE_LIBSSH2_INIT)
if(libssh2_init(0)) {
DEBUGF(fprintf(stderr, "Error: libssh2_init failed\n"));
return CURLE_FAILED_INIT;
}
#endif
if(flags & CURL_GLOBAL_ACK_EINTR)
Curl_ack_eintr = 1;
init_flags = flags;
Curl_version_init();
return CURLE_OK;
}
/*
* Curl_resolver_getaddrinfo() - for getaddrinfo
*/
Curl_addrinfo *Curl_resolver_getaddrinfo(struct connectdata *conn,
const char *hostname,
int port,
int *waitp)
{
struct addrinfo hints;
struct in_addr in;
Curl_addrinfo *res;
int error;
char sbuf[12];
int pf = PF_INET;
#ifdef CURLRES_IPV6
struct in6_addr in6;
#endif /* CURLRES_IPV6 */
*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 */
return Curl_ip2addr(AF_INET, &in, hostname, port);
#ifdef CURLRES_IPV6
/* check if this is an IPv6 address string */
if(Curl_inet_pton(AF_INET6, hostname, &in6) > 0)
/* This is an IPv6 address literal */
return Curl_ip2addr(AF_INET6, &in6, hostname, port);
#endif /* CURLRES_IPV6 */
#endif /* !USE_RESOLVE_ON_IPS */
#ifdef CURLRES_IPV6
/*
* Check if a limited name resolve has been requested.
*/
switch(conn->ip_version) {
case CURL_IPRESOLVE_V4:
pf = PF_INET;
break;
case CURL_IPRESOLVE_V6:
pf = PF_INET6;
break;
default:
pf = PF_UNSPEC;
break;
}
if((pf != PF_INET) && !Curl_ipv6works())
/* The stack seems to be a non-IPv6 one */
pf = PF_INET;
#endif /* CURLRES_IPV6 */
memset(&hints, 0, sizeof(hints));
hints.ai_family = pf;
hints.ai_socktype = conn->socktype;
snprintf(sbuf, sizeof(sbuf), "%d", port);
/* fire up a new resolver thread! */
if(init_resolve_thread(conn, hostname, port, &hints)) {
*waitp = 1; /* expect asynchronous response */
return NULL;
}
/* fall-back to blocking version */
infof(conn->data, "init_resolve_thread() failed for %s; %s\n",
hostname, Curl_strerror(conn, ERRNO));
error = Curl_getaddrinfo_ex(hostname, sbuf, &hints, &res);
if(error) {
infof(conn->data, "getaddrinfo() failed for %s:%d; %s\n",
hostname, port, Curl_strerror(conn, SOCKERRNO));
return NULL;
}
else {
Curl_addrinfo_set_port(res, port);
}
return res;
}
/*
* Curl_ipvalid() checks what CURL_IPRESOLVE_* requirements that might've
* been set and returns TRUE if they are OK.
*/
bool Curl_ipvalid(struct connectdata *conn)
{
if(conn->ip_version == CURL_IPRESOLVE_V6)
return Curl_ipv6works();
return TRUE;
}
/*
* Curl_resolver_getaddrinfo() - for getaddrinfo
*/
Curl_addrinfo *Curl_resolver_getaddrinfo(CURL *data,
const char *hostname,
int port,
int *waitp)
{
struct connectdata *conn = data->easy_conn;
struct addrinfo hints;
Curl_addrinfo *res;
int error;
char sbuf[12];
int pf = PF_INET;
*waitp = 0; /* default to synchronous response */
#ifndef USE_RESOLVE_ON_IPS
res = Curl_str2addr(hostname, port);
if(res)
return res;
#endif
#ifdef CURLRES_IPV6
/*
* Check if a limited name resolve has been requested.
*/
switch(conn->ip_version) {
case CURL_IPRESOLVE_V4:
pf = PF_INET;
break;
case CURL_IPRESOLVE_V6:
pf = PF_INET6;
break;
default:
pf = PF_UNSPEC;
break;
}
if((pf != PF_INET) && !Curl_ipv6works())
/* The stack seems to be a non-IPv6 one */
pf = PF_INET;
#endif /* CURLRES_IPV6 */
memset(&hints, 0, sizeof(hints));
hints.ai_family = pf;
hints.ai_socktype = conn->socktype;
snprintf(sbuf, sizeof(sbuf), "%d", port);
/* fire up a new resolver thread! */
if(init_resolve_thread(conn, hostname, port, &hints)) {
*waitp = 1; /* expect asynchronous response */
return NULL;
}
/* fall-back to blocking version */
infof(data, "init_resolve_thread() failed for %s; %s\n",
hostname, Curl_strerror(conn, errno));
error = Curl_getaddrinfo_ex(hostname, sbuf, &hints, &res);
if(error) {
infof(data, "getaddrinfo() failed for %s:%d; %s\n",
hostname, port, Curl_strerror(conn, SOCKERRNO));
return NULL;
}
else {
Curl_addrinfo_set_port(res, port);
}
return res;
}
