/* Used within the multi interface. Try next IP address, return TRUE if no
more address exists */
static bool trynextip(struct connectdata *conn,
int sockindex,
bool *connected)
{
curl_socket_t sockfd;
Curl_addrinfo *ai;
/* first close the failed socket */
sclose(conn->sock[sockindex]);
conn->sock[sockindex] = CURL_SOCKET_BAD;
*connected = FALSE;
if(sockindex != FIRSTSOCKET)
return TRUE; /* no next */
/* try the next address */
ai = conn->ip_addr->ai_next;
while (ai) {
sockfd = singleipconnect(conn, ai, 0L, connected);
if(sockfd != CURL_SOCKET_BAD) {
/* store the new socket descriptor */
conn->sock[sockindex] = sockfd;
conn->ip_addr = ai;
Curl_store_ip_addr(conn);
return FALSE;
}
ai = ai->ai_next;
}
return TRUE;
}
/* Used within the multi interface. Try next IP address, return TRUE if no
more address exists or error */
static CURLcode trynextip(struct connectdata *conn,
int sockindex,
int tempindex)
{
const int other = tempindex ^ 1;
CURLcode result = CURLE_COULDNT_CONNECT;
/* First clean up after the failed socket.
Don't close it yet to ensure that the next IP's socket gets a different
file descriptor, which can prevent bugs when the curl_multi_socket_action
interface is used with certain select() replacements such as kqueue. */
curl_socket_t fd_to_close = conn->tempsock[tempindex];
conn->tempsock[tempindex] = CURL_SOCKET_BAD;
if(sockindex == FIRSTSOCKET) {
Curl_addrinfo *ai = NULL;
int family = AF_UNSPEC;
if(conn->tempaddr[tempindex]) {
/* find next address in the same protocol family */
family = conn->tempaddr[tempindex]->ai_family;
ai = conn->tempaddr[tempindex]->ai_next;
}
#ifdef ENABLE_IPV6
else if(conn->tempaddr[0]) {
/* happy eyeballs - try the other protocol family */
int firstfamily = conn->tempaddr[0]->ai_family;
family = (firstfamily == AF_INET) ? AF_INET6 : AF_INET;
ai = conn->tempaddr[0]->ai_next;
}
#endif
while(ai) {
if(conn->tempaddr[other]) {
/* we can safely skip addresses of the other protocol family */
while(ai && ai->ai_family != family)
ai = ai->ai_next;
}
if(ai) {
result = singleipconnect(conn, ai, &conn->tempsock[tempindex]);
if(result == CURLE_COULDNT_CONNECT) {
ai = ai->ai_next;
continue;
}
conn->tempaddr[tempindex] = ai;
}
break;
}
}
if(fd_to_close != CURL_SOCKET_BAD)
Curl_closesocket(conn, fd_to_close);
return result;
}
/* Used within the multi interface. Try next IP address, return TRUE if no
more address exists or error */
static CURLcode trynextip(struct connectdata *conn,
int sockindex,
int tempindex,
bool *connected)
{
curl_socket_t sockfd;
Curl_addrinfo *ai;
int family = tempindex ? AF_INET6 : AF_INET;
/* First clean up after the failed socket.
Don't close it yet to ensure that the next IP's socket gets a different
file descriptor, which can prevent bugs when the curl_multi_socket_action
interface is used with certain select() replacements such as kqueue. */
curl_socket_t fd_to_close = conn->tempsock[tempindex];
conn->tempsock[tempindex] = CURL_SOCKET_BAD;
*connected = FALSE;
if(sockindex != FIRSTSOCKET) {
Curl_closesocket(conn, fd_to_close);
return CURLE_COULDNT_CONNECT; /* no next */
}
/* try the next address with same family */
ai = conn->tempaddr[tempindex]->ai_next;
while(ai && ai->ai_family != family)
ai = ai->ai_next;
while(ai && ai->ai_family == family) {
CURLcode res = singleipconnect(conn, ai, &sockfd, connected);
if(res)
return res;
if(sockfd != CURL_SOCKET_BAD) {
/* store the new socket descriptor */
conn->tempsock[tempindex] = sockfd;
conn->tempaddr[tempindex] = ai;
Curl_closesocket(conn, fd_to_close);
return CURLE_OK;
}
do {
ai = ai->ai_next;
} while(ai && ai->ai_family != family);
}
Curl_closesocket(conn, fd_to_close);
return CURLE_COULDNT_CONNECT;
}
CURLcode Curl_connecthost(struct connectdata *conn, /* context */
const struct Curl_dns_entry *remotehost)
{
struct SessionHandle *data = conn->data;
struct timeval before = Curl_tvnow();
CURLcode result = CURLE_COULDNT_CONNECT;
long timeout_ms = Curl_timeleft(data, &before, TRUE);
if(timeout_ms < 0) {
/* a precaution, no need to continue if time already is up */
failf(data, "Connection time-out");
return CURLE_OPERATION_TIMEDOUT;
}
conn->num_addr = Curl_num_addresses(remotehost->addr);
conn->tempaddr[0] = remotehost->addr;
conn->tempaddr[1] = NULL;
conn->tempsock[0] = CURL_SOCKET_BAD;
conn->tempsock[1] = CURL_SOCKET_BAD;
Curl_expire(conn->data, HAPPY_EYEBALLS_TIMEOUT);
/* Max time for the next connection attempt */
conn->timeoutms_per_addr =
conn->tempaddr[0]->ai_next == NULL ? timeout_ms : timeout_ms / 2;
/* start connecting to first IP */
while(conn->tempaddr[0]) {
result = singleipconnect(conn, conn->tempaddr[0], &(conn->tempsock[0]));
if(!result)
break;
conn->tempaddr[0] = conn->tempaddr[0]->ai_next;
}
if(conn->tempsock[0] == CURL_SOCKET_BAD) {
if(!result)
result = CURLE_COULDNT_CONNECT;
return result;
}
data->info.numconnects++; /* to track the number of connections made */
return CURLE_OK;
}
/* Used within the multi interface. Try next IP address, return TRUE if no
more address exists or error */
static CURLcode trynextip(struct connectdata *conn,
int sockindex,
int tempindex)
{
CURLcode rc = CURLE_COULDNT_CONNECT;
/* First clean up after the failed socket.
Don't close it yet to ensure that the next IP's socket gets a different
file descriptor, which can prevent bugs when the curl_multi_socket_action
interface is used with certain select() replacements such as kqueue. */
curl_socket_t fd_to_close = conn->tempsock[tempindex];
conn->tempsock[tempindex] = CURL_SOCKET_BAD;
if(sockindex == FIRSTSOCKET) {
Curl_addrinfo *ai;
int family;
if(conn->tempaddr[tempindex]) {
/* find next address in the same protocol family */
family = conn->tempaddr[tempindex]->ai_family;
ai = conn->tempaddr[tempindex]->ai_next;
}
else {
/* happy eyeballs - try the other protocol family */
int firstfamily = conn->tempaddr[0]->ai_family;
family = (firstfamily == AF_INET) ? AF_INET6 : AF_INET;
ai = conn->tempaddr[0]->ai_next;
}
while(ai && ai->ai_family != family)
ai = ai->ai_next;
if(ai) {
rc = singleipconnect(conn, ai, &conn->tempsock[tempindex]);
conn->tempaddr[tempindex] = ai;
}
}
if(fd_to_close != CURL_SOCKET_BAD)
Curl_closesocket(conn, fd_to_close);
return rc;
}
/* Used within the multi interface. Try next IP address, return TRUE if no
more address exists or error */
static CURLcode trynextip(struct connectdata *conn,
int sockindex,
bool *connected)
{
curl_socket_t sockfd;
Curl_addrinfo *ai;
/* First clean up after the failed socket.
Don't close it yet to ensure that the next IP's socket gets a different
file descriptor, which can prevent bugs when the curl_multi_socket_action
interface is used with certain select() replacements such as kqueue. */
curl_socket_t fd_to_close = conn->sock[sockindex];
conn->sock[sockindex] = CURL_SOCKET_BAD;
*connected = FALSE;
if(sockindex != FIRSTSOCKET) {
sclose(fd_to_close);
return CURLE_COULDNT_CONNECT; /* no next */
}
/* try the next address */
ai = conn->ip_addr->ai_next;
while(ai) {
CURLcode res = singleipconnect(conn, ai, 0L, &sockfd, connected);
if(res)
return res;
if(sockfd != CURL_SOCKET_BAD) {
/* store the new socket descriptor */
conn->sock[sockindex] = sockfd;
conn->ip_addr = ai;
sclose(fd_to_close);
return CURLE_OK;
}
ai = ai->ai_next;
}
sclose(fd_to_close);
return CURLE_COULDNT_CONNECT;
}
CURLcode Curl_connecthost(struct connectdata *conn, /* context */
const struct Curl_dns_entry *remotehost, /* use this one */
curl_socket_t *sockconn, /* the connected socket */
Curl_addrinfo **addr, /* the one we used */
bool *connected) /* really connected? */
{
struct SessionHandle *data = conn->data;
curl_socket_t sockfd = CURL_SOCKET_BAD;
int aliasindex;
int num_addr;
Curl_addrinfo *ai;
Curl_addrinfo *curr_addr;
struct timeval after;
struct timeval before = Curl_tvnow();
/*************************************************************
* Figure out what maximum time we have left
*************************************************************/
long timeout_ms= DEFAULT_CONNECT_TIMEOUT;
long timeout_per_addr;
*connected = FALSE; /* default to not connected */
if(data->set.timeout || data->set.connecttimeout) {
long has_passed;
/* Evaluate in milliseconds how much time that has passed */
has_passed = Curl_tvdiff(Curl_tvnow(), data->progress.t_startsingle);
#ifndef min
#define min(a, b) ((a) < (b) ? (a) : (b))
#endif
/* get the most strict timeout of the ones converted to milliseconds */
if(data->set.timeout && data->set.connecttimeout) {
if (data->set.timeout < data->set.connecttimeout)
timeout_ms = data->set.timeout*1000;
else
timeout_ms = data->set.connecttimeout*1000;
}
else if(data->set.timeout)
timeout_ms = data->set.timeout*1000;
else
timeout_ms = data->set.connecttimeout*1000;
/* subtract the passed time */
timeout_ms -= has_passed;
if(timeout_ms < 0) {
/* a precaution, no need to continue if time already is up */
failf(data, "Connection time-out");
return CURLE_OPERATION_TIMEOUTED;
}
}
Curl_expire(data, timeout_ms);
/* Max time for each address */
num_addr = Curl_num_addresses(remotehost->addr);
timeout_per_addr = timeout_ms / num_addr;
ai = remotehost->addr;
/* Below is the loop that attempts to connect to all IP-addresses we
* know for the given host. One by one until one IP succeeds.
*/
if(data->state.used_interface == Curl_if_multi)
/* don't hang when doing multi */
timeout_per_addr = 0;
/*
* Connecting with a Curl_addrinfo chain
*/
for (curr_addr = ai, aliasindex=0; curr_addr;
curr_addr = curr_addr->ai_next, aliasindex++) {
/* start connecting to the IP curr_addr points to */
sockfd = singleipconnect(conn, curr_addr, timeout_per_addr, connected);
if(sockfd != CURL_SOCKET_BAD)
break;
/* get a new timeout for next attempt */
after = Curl_tvnow();
timeout_ms -= Curl_tvdiff(after, before);
if(timeout_ms < 0) {
failf(data, "connect() timed out!");
return CURLE_OPERATION_TIMEOUTED;
}
before = after;
} /* end of connect-to-each-address loop */
if (sockfd == CURL_SOCKET_BAD) {
/* no good connect was made */
*sockconn = CURL_SOCKET_BAD;
failf(data, "couldn't connect to host");
return CURLE_COULDNT_CONNECT;
}
/* leave the socket in non-blocking mode */
/* store the address we use */
if(addr)
*addr = curr_addr;
/* allow NULL-pointers to get passed in */
if(sockconn)
*sockconn = sockfd; /* the socket descriptor we've connected */
data->info.numconnects++; /* to track the number of connections made */
return CURLE_OK;
}
CURLcode Curl_connecthost(struct connectdata *conn, /* context */
const struct Curl_dns_entry *remotehost,
curl_socket_t *sockconn, /* the connected socket */
Curl_addrinfo **addr, /* the one we used */
bool *connected) /* really connected? */
{
struct SessionHandle *data = conn->data;
curl_socket_t sockfd = CURL_SOCKET_BAD;
int aliasindex;
int num_addr;
Curl_addrinfo *ai;
Curl_addrinfo *curr_addr;
struct timeval after;
struct timeval before = Curl_tvnow();
/*************************************************************
* Figure out what maximum time we have left
*************************************************************/
long timeout_ms;
long timeout_per_addr;
DEBUGASSERT(sockconn);
*connected = FALSE; /* default to not connected */
/* get the timeout left */
timeout_ms = Curl_timeleft(conn, &before, TRUE);
if(timeout_ms < 0) {
/* a precaution, no need to continue if time already is up */
failf(data, "Connection time-out");
return CURLE_OPERATION_TIMEDOUT;
}
Curl_expire(data, timeout_ms);
/* Max time for each address */
num_addr = Curl_num_addresses(remotehost->addr);
timeout_per_addr = timeout_ms / num_addr;
ai = remotehost->addr;
/* Below is the loop that attempts to connect to all IP-addresses we
* know for the given host. One by one until one IP succeeds.
*/
if(data->state.used_interface == Curl_if_multi)
/* don't hang when doing multi */
timeout_per_addr = 0;
/*
* Connecting with a Curl_addrinfo chain
*/
for (curr_addr = ai, aliasindex=0; curr_addr;
curr_addr = curr_addr->ai_next, aliasindex++) {
/* start connecting to the IP curr_addr points to */
sockfd = singleipconnect(conn, curr_addr, timeout_per_addr, connected);
if(sockfd != CURL_SOCKET_BAD)
break;
/* get a new timeout for next attempt */
after = Curl_tvnow();
timeout_ms -= Curl_tvdiff(after, before);
if(timeout_ms < 0) {
failf(data, "connect() timed out!");
return CURLE_OPERATION_TIMEDOUT;
}
before = after;
} /* end of connect-to-each-address loop */
*sockconn = sockfd; /* the socket descriptor we've connected */
if(sockfd == CURL_SOCKET_BAD) {
/* no good connect was made */
failf(data, "couldn't connect to host");
return CURLE_COULDNT_CONNECT;
}
/* leave the socket in non-blocking mode */
/* store the address we use */
if(addr)
*addr = curr_addr;
data->info.numconnects++; /* to track the number of connections made */
return CURLE_OK;
}
CURLcode Curl_connecthost(struct connectdata *conn, /* context */
const struct Curl_dns_entry *remotehost,
bool *connected) /* really connected? */
{
struct SessionHandle *data = conn->data;
struct timeval after;
struct timeval before = Curl_tvnow();
int i;
/*************************************************************
* Figure out what maximum time we have left
*************************************************************/
long timeout_ms;
*connected = FALSE; /* default to not connected */
/* get the timeout left */
timeout_ms = Curl_timeleft(data, &before, TRUE);
if(timeout_ms < 0) {
/* a precaution, no need to continue if time already is up */
failf(data, "Connection time-out");
return CURLE_OPERATION_TIMEDOUT;
}
conn->num_addr = Curl_num_addresses(remotehost->addr);
conn->tempaddr[0] = remotehost->addr;
conn->tempaddr[1] = remotehost->addr;
/* Below is the loop that attempts to connect to all IP-addresses we
* know for the given host.
* One by one, for each protocol, until one IP succeeds.
*/
for(i=0; i<2; i++) {
curl_socket_t sockfd = CURL_SOCKET_BAD;
Curl_addrinfo *ai = conn->tempaddr[i];
int family = i ? AF_INET6 : AF_INET;
/* find first address for this address family, if any */
while(ai && ai->ai_family != family)
ai = ai->ai_next;
/*
* Connecting with a Curl_addrinfo chain
*/
while(ai) {
CURLcode res;
/* Max time for the next connection attempt */
conn->timeoutms_per_addr = ai->ai_next == NULL ?
timeout_ms : timeout_ms / 2;
/* start connecting to the IP curr_addr points to */
res = singleipconnect(conn, ai, &sockfd, connected);
if(res)
return res;
if(sockfd != CURL_SOCKET_BAD)
break;
/* get a new timeout for next attempt */
after = Curl_tvnow();
timeout_ms -= Curl_tvdiff(after, before);
if(timeout_ms < 0) {
failf(data, "connect() timed out!");
return CURLE_OPERATION_TIMEDOUT;
}
before = after;
/* next addresses */
do {
ai = ai->ai_next;
} while(ai && ai->ai_family != family);
} /* end of connect-to-each-address loop */
conn->tempsock[i] = sockfd;
conn->tempaddr[i] = ai;
}
if((conn->tempsock[0] == CURL_SOCKET_BAD) &&
(conn->tempsock[1] == CURL_SOCKET_BAD)) {
/* no good connect was made */
failf(data, "couldn't connect to %s at %s:%ld",
conn->bits.proxy?"proxy":"host",
conn->bits.proxy?conn->proxy.name:conn->host.name, conn->port);
return CURLE_COULDNT_CONNECT;
}
/* leave the socket in non-blocking mode */
data->info.numconnects++; /* to track the number of connections made */
return CURLE_OK;
}