/* singleipconnect() connects to the given IP only, and it may return without
having connected if used from the multi interface. */
static curl_socket_t
singleipconnect(struct connectdata *conn,
const Curl_addrinfo *ai,
long timeout_ms,
bool *connected)
{
struct Curl_sockaddr_ex addr;
char addr_buf[128];
int rc;
int error;
bool isconnected;
struct SessionHandle *data = conn->data;
curl_socket_t sockfd;
CURLcode res;
const void *iptoprint;
struct sockaddr_in * const sa4 = (void *)&addr.sa_addr;
#ifdef ENABLE_IPV6
struct sockaddr_in6 * const sa6 = (void *)&addr.sa_addr;
#endif
/*
* The Curl_sockaddr_ex structure is basically libcurl's external API
* curl_sockaddr structure with enough space available to directly hold
* any protocol-specific address structures. The variable declared here
* will be used to pass / receive data to/from the fopensocket callback
* if this has been set, before that, it is initialized from parameters.
*/
addr.family = ai->ai_family;
addr.socktype = conn->socktype;
addr.protocol = ai->ai_protocol;
addr.addrlen = ai->ai_addrlen;
if(addr.addrlen > sizeof(struct Curl_sockaddr_storage))
addr.addrlen = sizeof(struct Curl_sockaddr_storage);
memcpy(&addr.sa_addr, ai->ai_addr, addr.addrlen);
*connected = FALSE; /* default is not connected */
if(data->set.fopensocket)
/*
* If the opensocket callback is set, all the destination address
* information is passed to the callback. Depending on this information the
* callback may opt to abort the connection, this is indicated returning
* CURL_SOCKET_BAD; otherwise it will return a not-connected socket. When
* the callback returns a valid socket the destination address information
* might have been changed and this 'new' address will actually be used
* here to connect.
*/
sockfd = data->set.fopensocket(data->set.opensocket_client,
CURLSOCKTYPE_IPCXN,
(struct curl_sockaddr *)&addr);
else
/* opensocket callback not set, so simply create the socket now */
sockfd = socket(addr.family, addr.socktype, addr.protocol);
if(sockfd == CURL_SOCKET_BAD)
/* no socket, no connection */
return CURL_SOCKET_BAD;
#if defined(ENABLE_IPV6) && defined(HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID)
if (conn->scope && (addr.family == AF_INET6))
sa6->sin6_scope_id = conn->scope;
#endif
/* FIXME: do we have Curl_printable_address-like with struct sockaddr* as
argument? */
#if defined(HAVE_SYS_UN_H) && defined(AF_UNIX)
if(addr.family == AF_UNIX) {
infof(data, " Trying %s... ",
((const struct sockaddr_un*)(&addr.sa_addr))->sun_path);
snprintf(data->info.ip, MAX_IPADR_LEN, "%s",
((const struct sockaddr_un*)(&addr.sa_addr))->sun_path);
strcpy(conn->ip_addr_str, data->info.ip);
}
else
#endif
{
#ifdef ENABLE_IPV6
if(addr.family == AF_INET6) {
iptoprint = &sa6->sin6_addr;
conn->bits.ipv6 = TRUE;
}
else
#endif
{
iptoprint = &sa4->sin_addr;
}
if(Curl_inet_ntop(addr.family, iptoprint, addr_buf,
sizeof(addr_buf)) != NULL) {
infof(data, " Trying %s... ", addr_buf);
snprintf(data->info.ip, MAX_IPADR_LEN, "%s", addr_buf);
strcpy(conn->ip_addr_str, data->info.ip);
}
}
if(data->set.tcp_nodelay)
tcpnodelay(conn, sockfd);
nosigpipe(conn, sockfd);
Curl_sndbufset(sockfd);
if(data->set.fsockopt) {
/* activate callback for setting socket options */
error = data->set.fsockopt(data->set.sockopt_client,
sockfd,
CURLSOCKTYPE_IPCXN);
if(error) {
sclose(sockfd); /* close the socket and bail out */
return CURL_SOCKET_BAD;
}
}
/* possibly bind the local end to an IP, interface or port */
res = bindlocal(conn, sockfd, addr.family);
if(res) {
sclose(sockfd); /* close socket and bail out */
return CURL_SOCKET_BAD;
}
/* set socket non-blocking */
curlx_nonblock(sockfd, TRUE);
/* Connect TCP sockets, bind UDP */
if(conn->socktype == SOCK_STREAM)
rc = connect(sockfd, &addr.sa_addr, addr.addrlen);
else
rc = 0;
if(-1 == rc) {
error = SOCKERRNO;
switch (error) {
case EINPROGRESS:
case EWOULDBLOCK:
#if defined(EAGAIN)
#if (EAGAIN) != (EWOULDBLOCK)
/* On some platforms EAGAIN and EWOULDBLOCK are the
* same value, and on others they are different, hence
* the odd #if
*/
case EAGAIN:
#endif
#endif
rc = waitconnect(conn, sockfd, timeout_ms);
break;
default:
/* unknown error, fallthrough and try another address! */
failf(data, "Failed to connect to %s: %s",
addr_buf, Curl_strerror(conn,error));
data->state.os_errno = error;
break;
}
}
/* The 'WAITCONN_TIMEOUT == rc' comes from the waitconnect(), and not from
connect(). We can be sure of this since connect() cannot return 1. */
if((WAITCONN_TIMEOUT == rc) &&
(data->state.used_interface == Curl_if_multi)) {
/* Timeout when running the multi interface */
return sockfd;
}
isconnected = verifyconnect(sockfd, &error);
if(!rc && isconnected) {
/* we are connected, awesome! */
*connected = TRUE; /* this is a true connect */
infof(data, "connected\n");
Curl_updateconninfo(conn, sockfd);
return sockfd;
}
else if(WAITCONN_TIMEOUT == rc)
infof(data, "Timeout\n");
else {
data->state.os_errno = error;
infof(data, "%s\n", Curl_strerror(conn, error));
}
/* connect failed or timed out */
sclose(sockfd);
return CURL_SOCKET_BAD;
}
/* singleipconnect() connects to the given IP only, and it may return without
having connected if used from the multi interface. */
static curl_socket_t
singleipconnect(struct connectdata *conn,
const Curl_addrinfo *ai,
long timeout_ms,
bool *connected)
{
char addr_buf[128];
int rc;
int error;
bool isconnected;
struct SessionHandle *data = conn->data;
curl_socket_t sockfd;
CURLcode res;
sockfd = socket(ai->ai_family, conn->socktype, ai->ai_protocol);
if (sockfd == CURL_SOCKET_BAD)
return CURL_SOCKET_BAD;
*connected = FALSE; /* default is not connected */
Curl_printable_address(ai, addr_buf, sizeof(addr_buf));
infof(data, " Trying %s... ", addr_buf);
if(data->set.tcp_nodelay)
tcpnodelay(conn, sockfd);
nosigpipe(conn, sockfd);
if(data->set.fsockopt) {
/* activate callback for setting socket options */
error = data->set.fsockopt(data->set.sockopt_client,
sockfd,
CURLSOCKTYPE_IPCXN);
if (error) {
sclose(sockfd); /* close the socket and bail out */
return CURL_SOCKET_BAD;
}
}
/* possibly bind the local end to an IP, interface or port */
res = bindlocal(conn, sockfd);
if(res) {
sclose(sockfd); /* close socket and bail out */
return CURL_SOCKET_BAD;
}
/* set socket non-blocking */
Curl_nonblock(sockfd, TRUE);
/* Connect TCP sockets, bind UDP */
if(conn->socktype == SOCK_STREAM)
rc = connect(sockfd, ai->ai_addr, ai->ai_addrlen);
else
rc = 0;
if(-1 == rc) {
error = Curl_sockerrno();
switch (error) {
case EINPROGRESS:
case EWOULDBLOCK:
#if defined(EAGAIN) && EAGAIN != EWOULDBLOCK
/* On some platforms EAGAIN and EWOULDBLOCK are the
* same value, and on others they are different, hence
* the odd #if
*/
case EAGAIN:
#endif
rc = waitconnect(sockfd, timeout_ms);
break;
default:
/* unknown error, fallthrough and try another address! */
failf(data, "Failed to connect to %s: %s",
addr_buf, Curl_strerror(conn,error));
data->state.os_errno = error;
break;
}
}
/* The 'WAITCONN_TIMEOUT == rc' comes from the waitconnect(), and not from
connect(). We can be sure of this since connect() cannot return 1. */
if((WAITCONN_TIMEOUT == rc) &&
(data->state.used_interface == Curl_if_multi)) {
/* Timeout when running the multi interface */
return sockfd;
}
isconnected = verifyconnect(sockfd, &error);
if(!rc && isconnected) {
/* we are connected, awesome! */
*connected = TRUE; /* this is a true connect */
infof(data, "connected\n");
return sockfd;
}
else if(WAITCONN_TIMEOUT == rc)
infof(data, "Timeout\n");
else {
data->state.os_errno = error;
infof(data, "%s\n", Curl_strerror(conn, error));
}
/* connect failed or timed out */
sclose(sockfd);
return CURL_SOCKET_BAD;
}
/*
* singleipconnect()
*
* Note that even on connect fail it returns CURLE_OK, but with 'sock' set to
* CURL_SOCKET_BAD. Other errors will however return proper errors.
*
* singleipconnect() connects to the given IP only, and it may return without
* having connected if used from the multi interface.
*/
static CURLcode
singleipconnect(struct connectdata *conn,
const Curl_addrinfo *ai,
long timeout_ms,
curl_socket_t *sockp,
bool *connected)
{
struct Curl_sockaddr_ex addr;
int rc;
int error = 0;
bool isconnected = FALSE;
struct SessionHandle *data = conn->data;
curl_socket_t sockfd;
CURLcode res = CURLE_OK;
*sockp = CURL_SOCKET_BAD;
*connected = FALSE; /* default is not connected */
res = Curl_socket(conn, ai, &addr, &sockfd);
if(res)
/* Failed to create the socket, but still return OK since we signal the
lack of socket as well. This allows the parent function to keep looping
over alternative addresses/socket families etc. */
return CURLE_OK;
/* store remote address and port used in this connection attempt */
if(!getaddressinfo((struct sockaddr*)&addr.sa_addr,
conn->primary_ip, &conn->primary_port)) {
/* malformed address or bug in inet_ntop, try next address */
error = ERRNO;
failf(data, "sa_addr inet_ntop() failed with errno %d: %s",
error, Curl_strerror(conn, error));
Curl_closesocket(conn, sockfd);
return CURLE_OK;
}
memcpy(conn->ip_addr_str, conn->primary_ip, MAX_IPADR_LEN);
infof(data, " Trying %s...\n", conn->ip_addr_str);
Curl_persistconninfo(conn);
if(data->set.tcp_nodelay)
tcpnodelay(conn, sockfd);
nosigpipe(conn, sockfd);
Curl_sndbufset(sockfd);
if(data->set.tcp_keepalive)
tcpkeepalive(data, sockfd);
if(data->set.fsockopt) {
/* activate callback for setting socket options */
error = data->set.fsockopt(data->set.sockopt_client,
sockfd,
CURLSOCKTYPE_IPCXN);
if(error == CURL_SOCKOPT_ALREADY_CONNECTED)
isconnected = TRUE;
else if(error) {
Curl_closesocket(conn, sockfd); /* close the socket and bail out */
return CURLE_ABORTED_BY_CALLBACK;
}
}
/* possibly bind the local end to an IP, interface or port */
res = bindlocal(conn, sockfd, addr.family);
if(res) {
Curl_closesocket(conn, sockfd); /* close socket and bail out */
return res;
}
/* set socket non-blocking */
curlx_nonblock(sockfd, TRUE);
/* Connect TCP sockets, bind UDP */
if(!isconnected && (conn->socktype == SOCK_STREAM)) {
rc = connect(sockfd, &addr.sa_addr, addr.addrlen);
if(-1 == rc)
error = SOCKERRNO;
conn->connecttime = Curl_tvnow();
if(conn->num_addr > 1)
Curl_expire(data, conn->timeoutms_per_addr);
}
else
rc = 0;
if(-1 == rc) {
switch (error) {
case EINPROGRESS:
case EWOULDBLOCK:
#if defined(EAGAIN)
#if (EAGAIN) != (EWOULDBLOCK)
/* On some platforms EAGAIN and EWOULDBLOCK are the
* same value, and on others they are different, hence
* the odd #if
*/
case EAGAIN:
#endif
#endif
rc = waitconnect(conn, sockfd, timeout_ms);
if(WAITCONN_ABORTED == rc) {
Curl_closesocket(conn, sockfd);
return CURLE_ABORTED_BY_CALLBACK;
}
break;
default:
/* unknown error, fallthrough and try another address! */
failf(data, "Failed to connect to %s: %s",
conn->ip_addr_str, Curl_strerror(conn,error));
data->state.os_errno = error;
break;
}
}
/* The 'WAITCONN_TIMEOUT == rc' comes from the waitconnect(), and not from
connect(). We can be sure of this since connect() cannot return 1. */
if((WAITCONN_TIMEOUT == rc) &&
(data->state.used_interface == Curl_if_multi)) {
/* Timeout when running the multi interface */
*sockp = sockfd;
return CURLE_OK;
}
if(!isconnected)
isconnected = verifyconnect(sockfd, &error);
if(!rc && isconnected) {
/* we are connected, awesome! */
*connected = TRUE; /* this is a true connect */
infof(data, "connected\n");
#ifdef ENABLE_IPV6
conn->bits.ipv6 = (addr.family == AF_INET6)?TRUE:FALSE;
#endif
Curl_updateconninfo(conn, sockfd);
*sockp = sockfd;
return CURLE_OK;
}
else if(WAITCONN_TIMEOUT == rc)
infof(data, "Timeout\n");
else {
data->state.os_errno = error;
infof(data, "%s\n", Curl_strerror(conn, error));
}
/* connect failed or timed out */
Curl_closesocket(conn, sockfd);
return CURLE_OK;
}
/*
* singleipconnect()
*
* Note that even on connect fail it returns CURLE_OK, but with 'sock' set to
* CURL_SOCKET_BAD. Other errors will however return proper errors.
*
* singleipconnect() connects to the given IP only, and it may return without
* having connected.
*/
static CURLcode singleipconnect(struct connectdata *conn,
const Curl_addrinfo *ai,
curl_socket_t *sockp)
{
struct Curl_sockaddr_ex addr;
int rc;
int error = 0;
bool isconnected = FALSE;
struct SessionHandle *data = conn->data;
curl_socket_t sockfd;
CURLcode result;
char ipaddress[MAX_IPADR_LEN];
long port;
bool is_tcp;
*sockp = CURL_SOCKET_BAD;
result = Curl_socket(conn, ai, &addr, &sockfd);
if(result)
/* Failed to create the socket, but still return OK since we signal the
lack of socket as well. This allows the parent function to keep looping
over alternative addresses/socket families etc. */
return CURLE_OK;
/* store remote address and port used in this connection attempt */
if(!getaddressinfo((struct sockaddr*)&addr.sa_addr,
ipaddress, &port)) {
/* malformed address or bug in inet_ntop, try next address */
error = ERRNO;
failf(data, "sa_addr inet_ntop() failed with errno %d: %s",
error, Curl_strerror(conn, error));
Curl_closesocket(conn, sockfd);
return CURLE_OK;
}
infof(data, " Trying %s...\n", ipaddress);
is_tcp = (addr.family == AF_INET || addr.family == AF_INET6) &&
addr.socktype == SOCK_STREAM;
if(is_tcp && data->set.tcp_nodelay)
tcpnodelay(conn, sockfd);
nosigpipe(conn, sockfd);
Curl_sndbufset(sockfd);
if(is_tcp && data->set.tcp_keepalive)
tcpkeepalive(data, sockfd);
if(data->set.fsockopt) {
/* activate callback for setting socket options */
error = data->set.fsockopt(data->set.sockopt_client,
sockfd,
CURLSOCKTYPE_IPCXN);
if(error == CURL_SOCKOPT_ALREADY_CONNECTED)
isconnected = TRUE;
else if(error) {
Curl_closesocket(conn, sockfd); /* close the socket and bail out */
return CURLE_ABORTED_BY_CALLBACK;
}
}
/* possibly bind the local end to an IP, interface or port */
if(addr.family == AF_INET || addr.family == AF_INET6) {
result = bindlocal(conn, sockfd, addr.family,
Curl_ipv6_scope((struct sockaddr*)&addr.sa_addr));
if(result) {
Curl_closesocket(conn, sockfd); /* close socket and bail out */
if(result == CURLE_UNSUPPORTED_PROTOCOL) {
/* The address family is not supported on this interface.
We can continue trying addresses */
return CURLE_COULDNT_CONNECT;
}
return result;
}
}
/* set socket non-blocking */
(void)curlx_nonblock(sockfd, TRUE);
conn->connecttime = Curl_tvnow();
if(conn->num_addr > 1)
Curl_expire_latest(data, conn->timeoutms_per_addr);
/* Connect TCP sockets, bind UDP */
if(!isconnected && (conn->socktype == SOCK_STREAM)) {
rc = connect(sockfd, &addr.sa_addr, addr.addrlen);
if(-1 == rc)
error = SOCKERRNO;
}
else {
*sockp = sockfd;
return CURLE_OK;
}
#ifdef ENABLE_IPV6
conn->bits.ipv6 = (addr.family == AF_INET6)?TRUE:FALSE;
#endif
if(-1 == rc) {
switch(error) {
case EINPROGRESS:
case EWOULDBLOCK:
#if defined(EAGAIN)
#if (EAGAIN) != (EWOULDBLOCK)
/* On some platforms EAGAIN and EWOULDBLOCK are the
* same value, and on others they are different, hence
* the odd #if
*/
case EAGAIN:
#endif
#endif
result = CURLE_OK;
break;
default:
/* unknown error, fallthrough and try another address! */
infof(data, "Immediate connect fail for %s: %s\n",
ipaddress, Curl_strerror(conn,error));
data->state.os_errno = error;
/* connect failed */
Curl_closesocket(conn, sockfd);
result = CURLE_COULDNT_CONNECT;
}
}
if(!result)
*sockp = sockfd;
return result;
}
/*
* singleipconnect()
*
* Note that even on connect fail it returns CURLE_OK, but with 'sock' set to
* CURL_SOCKET_BAD. Other errors will however return proper errors.
*
* singleipconnect() connects to the given IP only, and it may return without
* having connected if used from the multi interface.
*/
static CURLcode
singleipconnect(struct connectdata *conn,
const Curl_addrinfo *ai,
long timeout_ms,
curl_socket_t *sockp,
bool *connected)
{
struct Curl_sockaddr_ex addr;
int rc;
int error;
bool isconnected = FALSE;
struct SessionHandle *data = conn->data;
curl_socket_t sockfd;
CURLcode res = CURLE_OK;
#if defined(ENABLE_IPV6) && defined(HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID)
struct sockaddr_in6 * const sa6 = (void *)&addr.sa_addr;
#endif
*sockp = CURL_SOCKET_BAD;
/*
* The Curl_sockaddr_ex structure is basically libcurl's external API
* curl_sockaddr structure with enough space available to directly hold
* any protocol-specific address structures. The variable declared here
* will be used to pass / receive data to/from the fopensocket callback
* if this has been set, before that, it is initialized from parameters.
*/
addr.family = ai->ai_family;
addr.socktype = conn->socktype;
addr.protocol = conn->socktype==SOCK_DGRAM?IPPROTO_UDP:ai->ai_protocol;
addr.addrlen = ai->ai_addrlen;
if(addr.addrlen > sizeof(struct Curl_sockaddr_storage))
addr.addrlen = sizeof(struct Curl_sockaddr_storage);
memcpy(&addr.sa_addr, ai->ai_addr, addr.addrlen);
*connected = FALSE; /* default is not connected */
if(data->set.fopensocket)
/*
* If the opensocket callback is set, all the destination address
* information is passed to the callback. Depending on this information the
* callback may opt to abort the connection, this is indicated returning
* CURL_SOCKET_BAD; otherwise it will return a not-connected socket. When
* the callback returns a valid socket the destination address information
* might have been changed and this 'new' address will actually be used
* here to connect.
*/
sockfd = data->set.fopensocket(data->set.opensocket_client,
CURLSOCKTYPE_IPCXN,
(struct curl_sockaddr *)&addr);
else
/* opensocket callback not set, so simply create the socket now */
sockfd = socket(addr.family, addr.socktype, addr.protocol);
if(sockfd == CURL_SOCKET_BAD)
/* no socket, no connection */
return CURLE_OK;
#if defined(ENABLE_IPV6) && defined(HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID)
if (conn->scope && (addr.family == AF_INET6))
sa6->sin6_scope_id = conn->scope;
#endif
/* store remote address and port used in this connection attempt */
if(!getaddressinfo((struct sockaddr*)&addr.sa_addr,
conn->primary_ip, &conn->primary_port)) {
/* malformed address or bug in inet_ntop, try next address */
error = ERRNO;
failf(data, "sa_addr inet_ntop() failed with errno %d: %s",
error, Curl_strerror(conn, error));
sclose(sockfd);
return CURLE_OK;
}
memcpy(conn->ip_addr_str, conn->primary_ip, MAX_IPADR_LEN);
infof(data, " Trying %s... ", conn->ip_addr_str);
Curl_persistconninfo(conn);
#ifdef ENABLE_IPV6
if(addr.family == AF_INET6)
conn->bits.ipv6 = TRUE;
#endif
if(data->set.tcp_nodelay)
tcpnodelay(conn, sockfd);
nosigpipe(conn, sockfd);
Curl_sndbufset(sockfd);
if(data->set.fsockopt) {
/* activate callback for setting socket options */
error = data->set.fsockopt(data->set.sockopt_client,
sockfd,
CURLSOCKTYPE_IPCXN);
if(error == CURL_SOCKOPT_ALREADY_CONNECTED)
isconnected = TRUE;
else if(error) {
sclose(sockfd); /* close the socket and bail out */
return CURLE_ABORTED_BY_CALLBACK;
}
}
/* possibly bind the local end to an IP, interface or port */
res = bindlocal(conn, sockfd, addr.family);
if(res) {
sclose(sockfd); /* close socket and bail out */
return res;
}
/* set socket non-blocking */
curlx_nonblock(sockfd, TRUE);
/* Connect TCP sockets, bind UDP */
if(!isconnected && (conn->socktype == SOCK_STREAM)) {
rc = connect(sockfd, &addr.sa_addr, addr.addrlen);
conn->connecttime = Curl_tvnow();
if(conn->num_addr > 1)
Curl_expire(data, conn->timeoutms_per_addr);
}
else
rc = 0;
if(-1 == rc) {
error = SOCKERRNO;
switch (error) {
case EINPROGRESS:
case EWOULDBLOCK:
#if defined(EAGAIN)
#if (EAGAIN) != (EWOULDBLOCK)
/* On some platforms EAGAIN and EWOULDBLOCK are the
* same value, and on others they are different, hence
* the odd #if
*/
case EAGAIN:
#endif
#endif
rc = waitconnect(conn, sockfd, timeout_ms);
if(WAITCONN_ABORTED == rc) {
sclose(sockfd);
return CURLE_ABORTED_BY_CALLBACK;
}
break;
default:
/* unknown error, fallthrough and try another address! */
failf(data, "Failed to connect to %s: %s",
conn->ip_addr_str, Curl_strerror(conn,error));
data->state.os_errno = error;
break;
}
}
/* The 'WAITCONN_TIMEOUT == rc' comes from the waitconnect(), and not from
connect(). We can be sure of this since connect() cannot return 1. */
if((WAITCONN_TIMEOUT == rc) &&
(data->state.used_interface == Curl_if_multi)) {
/* Timeout when running the multi interface */
*sockp = sockfd;
return CURLE_OK;
}
if(!isconnected)
isconnected = verifyconnect(sockfd, &error);
if(!rc && isconnected) {
/* we are connected, awesome! */
*connected = TRUE; /* this is a true connect */
infof(data, "connected\n");
Curl_updateconninfo(conn, sockfd);
*sockp = sockfd;
return CURLE_OK;
}
else if(WAITCONN_TIMEOUT == rc)
infof(data, "Timeout\n");
else {
data->state.os_errno = error;
infof(data, "%s\n", Curl_strerror(conn, error));
}
/* connect failed or timed out */
sclose(sockfd);
return CURLE_OK;
}
/*
* singleipconnect()
*
* Note that even on connect fail it returns CURLE_OK, but with 'sock' set to
* CURL_SOCKET_BAD. Other errors will however return proper errors.
*
* singleipconnect() connects to the given IP only, and it may return without
* having connected.
*/
static CURLcode singleipconnect(struct connectdata *conn,
const Curl_addrinfo *ai,
curl_socket_t *sockp)
{
struct Curl_sockaddr_ex addr;
int rc = -1;
int error = 0;
bool isconnected = FALSE;
struct Curl_easy *data = conn->data;
curl_socket_t sockfd;
CURLcode result;
char ipaddress[MAX_IPADR_LEN];
long port;
bool is_tcp;
*sockp = CURL_SOCKET_BAD;
result = Curl_socket(conn, ai, &addr, &sockfd);
if(result)
/* Failed to create the socket, but still return OK since we signal the
lack of socket as well. This allows the parent function to keep looping
over alternative addresses/socket families etc. */
return CURLE_OK;
/* store remote address and port used in this connection attempt */
if(!getaddressinfo((struct sockaddr*)&addr.sa_addr,
ipaddress, &port)) {
/* malformed address or bug in inet_ntop, try next address */
failf(data, "sa_addr inet_ntop() failed with errno %d: %s",
errno, Curl_strerror(conn, errno));
Curl_closesocket(conn, sockfd);
return CURLE_OK;
}
infof(data, " Trying %s...\n", ipaddress);
#ifdef ENABLE_IPV6
is_tcp = (addr.family == AF_INET || addr.family == AF_INET6) &&
addr.socktype == SOCK_STREAM;
#else
is_tcp = (addr.family == AF_INET) && addr.socktype == SOCK_STREAM;
#endif
if(is_tcp && data->set.tcp_nodelay)
Curl_tcpnodelay(conn, sockfd);
nosigpipe(conn, sockfd);
Curl_sndbufset(sockfd);
if(is_tcp && data->set.tcp_keepalive)
tcpkeepalive(data, sockfd);
if(data->set.fsockopt) {
/* activate callback for setting socket options */
error = data->set.fsockopt(data->set.sockopt_client,
sockfd,
CURLSOCKTYPE_IPCXN);
if(error == CURL_SOCKOPT_ALREADY_CONNECTED)
isconnected = TRUE;
else if(error) {
Curl_closesocket(conn, sockfd); /* close the socket and bail out */
return CURLE_ABORTED_BY_CALLBACK;
}
}
/* possibly bind the local end to an IP, interface or port */
if(addr.family == AF_INET
#ifdef ENABLE_IPV6
|| addr.family == AF_INET6
#endif
) {
result = bindlocal(conn, sockfd, addr.family,
Curl_ipv6_scope((struct sockaddr*)&addr.sa_addr));
if(result) {
Curl_closesocket(conn, sockfd); /* close socket and bail out */
if(result == CURLE_UNSUPPORTED_PROTOCOL) {
/* The address family is not supported on this interface.
We can continue trying addresses */
return CURLE_COULDNT_CONNECT;
}
return result;
}
}
/* set socket non-blocking */
(void)curlx_nonblock(sockfd, TRUE);
conn->connecttime = Curl_tvnow();
if(conn->num_addr > 1)
Curl_expire(data, conn->timeoutms_per_addr, EXPIRE_DNS_PER_NAME);
/* Connect TCP sockets, bind UDP */
if(!isconnected && (conn->socktype == SOCK_STREAM)) {
if(conn->bits.tcp_fastopen) {
#if defined(CONNECT_DATA_IDEMPOTENT) /* OS X */
#ifdef HAVE_BUILTIN_AVAILABLE
if(__builtin_available(macOS 10.11, iOS 9.0, tvOS 9.0, watchOS 2.0, *)) {
#endif /* HAVE_BUILTIN_AVAILABLE */
sa_endpoints_t endpoints;
endpoints.sae_srcif = 0;
endpoints.sae_srcaddr = NULL;
endpoints.sae_srcaddrlen = 0;
endpoints.sae_dstaddr = &addr.sa_addr;
endpoints.sae_dstaddrlen = addr.addrlen;
rc = connectx(sockfd, &endpoints, SAE_ASSOCID_ANY,
CONNECT_RESUME_ON_READ_WRITE | CONNECT_DATA_IDEMPOTENT,
NULL, 0, NULL, NULL);
#ifdef HAVE_BUILTIN_AVAILABLE
}
else {
rc = connect(sockfd, &addr.sa_addr, addr.addrlen);
}
#endif /* HAVE_BUILTIN_AVAILABLE */
#elif defined(MSG_FASTOPEN) /* Linux */
if(conn->given->flags & PROTOPT_SSL)
rc = connect(sockfd, &addr.sa_addr, addr.addrlen);
else
rc = 0; /* Do nothing */
#endif
}
else {
/* singleipconnect() connects to the given IP only, and it may return without
having connected if used from the multi interface. */
static curl_socket_t
singleipconnect(struct connectdata *conn,
Curl_addrinfo *ai,
long timeout_ms,
bool *connected)
{
char addr_buf[128];
int rc;
int error;
bool conected;
struct SessionHandle *data = conn->data;
curl_socket_t sockfd = socket(ai->ai_family, ai->ai_socktype,
ai->ai_protocol);
if (sockfd == CURL_SOCKET_BAD)
return CURL_SOCKET_BAD;
*connected = FALSE; /* default is not connected */
Curl_printable_address(ai, addr_buf, sizeof(addr_buf));
infof(data, " Trying %s... ", addr_buf);
if(data->set.tcp_nodelay)
tcpnodelay(conn, sockfd);
#ifdef SO_NOSIGPIPE
nosigpipe(conn, sockfd);
#endif
if(conn->data->set.device) {
/* user selected to bind the outgoing socket to a specified "device"
before doing connect */
CURLcode res = bindlocal(conn, sockfd);
if(res) {
sclose(sockfd); /* close socket and bail out */
return CURL_SOCKET_BAD;
}
}
/* set socket non-blocking */
Curl_nonblock(sockfd, TRUE);
rc = connect(sockfd, ai->ai_addr, (socklen_t)ai->ai_addrlen);
if(-1 == rc) {
error = Curl_ourerrno();
switch (error) {
case EINPROGRESS:
case EWOULDBLOCK:
#if defined(EAGAIN) && EAGAIN != EWOULDBLOCK
/* On some platforms EAGAIN and EWOULDBLOCK are the
* same value, and on others they are different, hence
* the odd #if
*/
case EAGAIN:
#endif
rc = waitconnect(sockfd, timeout_ms);
break;
default:
/* unknown error, fallthrough and try another address! */
failf(data, "Failed to connect to %s: %s",
addr_buf, Curl_strerror(conn,error));
data->state.os_errno = error;
break;
}
}
/* The 'WAITCONN_TIMEOUT == rc' comes from the waitconnect(), and not from
connect(). We can be sure of this since connect() cannot return 1. */
if((WAITCONN_TIMEOUT == rc) &&
(data->state.used_interface == Curl_if_multi)) {
/* Timeout when running the multi interface */
return sockfd;
}
conected = verifyconnect(sockfd, &error);
if(!rc && conected) {
/* we are connected, awesome! */
*connected = TRUE; /* this is a true connect */
infof(data, "connected\n");
return sockfd;
}
else if(WAITCONN_TIMEOUT == rc)
infof(data, "Timeout\n");
else {
data->state.os_errno = error;
infof(data, "%s\n", Curl_strerror(conn, error));
}
/* connect failed or timed out */
sclose(sockfd);
return CURL_SOCKET_BAD;
}
CURLcode Curl_connecthost(struct connectdata *conn, /* context */
struct Curl_dns_entry *remotehost, /* use this one */
int port, /* connect to this */
curl_socket_t *sockconn, /* the connected socket */
Curl_ipconnect **addr, /* the one we used */
bool *connected) /* really connected? */
{
struct SessionHandle *data = conn->data;
int rc;
curl_socket_t sockfd= CURL_SOCKET_BAD;
int aliasindex=0;
char *hostname;
struct timeval after;
struct timeval before = Curl_tvnow();
#ifdef ENABLE_IPV6
struct addrinfo *ai;
#endif
/*************************************************************
* Figure out what maximum time we have left
*************************************************************/
long timeout_ms=300000; /* milliseconds, default to five minutes */
*connected = FALSE; /* default to not connected */
if(data->set.timeout || data->set.connecttimeout) {
double has_passed;
/* Evaluate in milliseconds how much time that has passed */
has_passed = Curl_tvdiff(Curl_tvnow(), data->progress.start);
#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 -= (long)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;
}
}
hostname = data->change.proxy?conn->proxyhost:conn->hostname;
infof(data, "About to connect() to %s port %d\n",
hostname, port);
#ifdef ENABLE_IPV6
/*
* Connecting with a getaddrinfo chain
*/
for (ai = remotehost->addr; ai; ai = ai->ai_next, aliasindex++) {
sockfd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
if (sockfd == CURL_SOCKET_BAD)
continue;
#else
/*
* Connecting with old style IPv4-only support
*/
/* This is the loop that attempts to connect to all IP-addresses we
know for the given host. One by one. */
for(rc=-1, aliasindex=0;
rc && (struct in_addr *)remotehost->addr->h_addr_list[aliasindex];
aliasindex++) {
struct sockaddr_in serv_addr;
/* create an IPv4 TCP socket */
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if(CURL_SOCKET_BAD == sockfd) {
failf(data, "couldn't create socket");
return CURLE_COULDNT_CONNECT; /* big time error */
}
/* nasty address work before connect can be made */
memset((char *) &serv_addr, '\0', sizeof(serv_addr));
memcpy((char *)&(serv_addr.sin_addr),
(struct in_addr *)remotehost->addr->h_addr_list[aliasindex],
sizeof(struct in_addr));
serv_addr.sin_family = remotehost->addr->h_addrtype;
serv_addr.sin_port = htons((unsigned short)port);
#endif
if(conn->data->set.device) {
/* user selected to bind the outgoing socket to a specified "device"
before doing connect */
CURLcode res = bindlocal(conn, sockfd);
if(res)
return res;
}
/* set socket non-blocking */
Curl_nonblock(sockfd, TRUE);
/* do not use #ifdef within the function arguments below, as connect() is
a defined macro on some platforms and some compilers don't like to mix
#ifdefs with macro usage! (AmigaOS is one such platform) */
#ifdef ENABLE_IPV6
rc = connect(sockfd, ai->ai_addr, ai->ai_addrlen);
#else
rc = connect(sockfd, (struct sockaddr *)&serv_addr, sizeof(serv_addr));
#endif
if(-1 == rc) {
int error=Curl_ourerrno();
switch (error) {
case EINPROGRESS:
case EWOULDBLOCK:
#if defined(EAGAIN) && EAGAIN != EWOULDBLOCK
/* On some platforms EAGAIN and EWOULDBLOCK are the
* same value, and on others they are different, hence
* the odd #if
*/
case EAGAIN:
#endif
/* asynchronous connect, wait for connect or timeout */
if(data->state.used_interface == Curl_if_multi)
/* don't hang when doing multi */
timeout_ms = 0;
rc = waitconnect(sockfd, timeout_ms);
break;
default:
/* unknown error, fallthrough and try another address! */
failf(data, "Failed to connect to %s IP number %d: %d",
hostname, aliasindex+1, error);
break;
}
}
/* The '1 == rc' comes from the waitconnect(), and not from connect().
We can be sure of this since connect() cannot return 1. */
if((1 == rc) && (data->state.used_interface == Curl_if_multi)) {
/* Timeout when running the multi interface, we return here with a
CURLE_OK return code. */
rc = 0;
break;
}
if(0 == rc) {
if (verifyconnect(sockfd)) {
/* we are connected, awesome! */
*connected = TRUE; /* this is a true connect */
break;
}
/* nope, not connected for real */
rc = -1;
}
/* connect failed or timed out */
sclose(sockfd);
sockfd = -1;
/* 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;
}
if (sockfd == CURL_SOCKET_BAD) {
/* no good connect was made */
*sockconn = -1;
failf(data, "Connect failed");
return CURLE_COULDNT_CONNECT;
}
/* leave the socket in non-blocking mode */
/* store the address we use */
if(addr) {
#ifdef ENABLE_IPV6
*addr = ai;
#else
*addr = (struct in_addr *)remotehost->addr->h_addr_list[aliasindex];
#endif
}
/* allow NULL-pointers to get passed in */
if(sockconn)
*sockconn = sockfd; /* the socket descriptor we've connected */
return CURLE_OK;
}
CURLcode Curl_connecthost(struct connectdata *conn, /* context */
struct Curl_dns_entry *remotehost, /* use this one */
int port, /* connect to this */
int *sockconn, /* the connected socket */
Curl_ipconnect **addr, /* the one we used */
bool *connected) /* really connected? */
{
struct SessionHandle *data = conn->data;
int rc;
int sockfd=-1;
int aliasindex=0;
char *hostname;
struct timeval after;
struct timeval before = Curl_tvnow();
/*************************************************************
* Figure out what maximum time we have left
*************************************************************/
long timeout_ms=300000; /* milliseconds, default to five minutes */
*connected = FALSE; /* default to not connected */
if(data->set.timeout || data->set.connecttimeout) {
double has_passed;
/* Evaluate in milliseconds how much time that has passed */
has_passed = Curl_tvdiff(Curl_tvnow(), data->progress.start);
#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 -= (long)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;
}
}
hostname = data->change.proxy?conn->proxyhost:conn->hostname;
infof(data, "About to connect() to %s%s%s:%d\n",
conn->bits.ipv6_ip?"[":"",
hostname,
conn->bits.ipv6_ip?"]":"",
port);
#ifdef ENABLE_IPV6
/*
* Connecting with IPv6 support is so much easier and cleanly done
*/
{
struct addrinfo *ai;
port =0; /* prevent compiler warning */
for (ai = remotehost->addr; ai; ai = ai->ai_next, aliasindex++) {
sockfd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
if (sockfd < 0)
continue;
if(conn->data->set.device) {
/* user selected to bind the outgoing socket to a specified "device"
before doing connect */
CURLcode res = bindlocal(conn, sockfd);
if(res)
return res;
}
/* set socket non-blocking */
Curl_nonblock(sockfd, TRUE);
rc = connect(sockfd, ai->ai_addr, ai->ai_addrlen);
if(-1 == rc) {
int error=Curl_ourerrno();
switch (error) {
case EINPROGRESS:
case EWOULDBLOCK:
#if defined(EAGAIN) && EAGAIN != EWOULDBLOCK
/* On some platforms EAGAIN and EWOULDBLOCK are the
* same value, and on others they are different, hence
* the odd #if
*/
case EAGAIN:
#endif
case EINTR:
/* asynchronous connect, wait for connect or timeout */
if(data->state.used_interface == Curl_if_multi)
/* don't hang when doing multi */
timeout_ms = 0;
rc = waitconnect(sockfd, timeout_ms);
break;
case ECONNREFUSED: /* no one listening */
default:
/* unknown error, fallthrough and try another address! */
failf(data, "Failed connect to %s: %d", hostname, error);
break;
}
}
if(0 == rc) {
/* we might be connected, if the socket says it is OK! Ask it! */
int err;
err = socketerror(sockfd);
if ((0 == err) || (EISCONN == err)) {
/* we are connected, awesome! */
*connected = TRUE; /* this is truly a connect */
break;
}
failf(data, "socket error: %d", err);
/* we are _not_ connected, it was a false alert, continue please */
}
else if(2 == rc)
/* waitconnect() returned error */
;
else if(data->state.used_interface == Curl_if_multi) {
/* When running the multi interface, we bail out here */
rc = 0;
break;
}
/* connect failed or timed out */
sclose(sockfd);
sockfd = -1;
/* 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;
continue;
}
if (sockfd < 0)
return CURLE_COULDNT_CONNECT;
/* leave the socket in non-blocking mode */
if(addr)
*addr = ai; /* the address we ended up connected to */
}
#else
/*
* Connecting with IPv4-only support
*/
if(!remotehost->addr->h_addr_list[0]) {
/* If there is no addresses in the address list, then we return
error right away */
failf(data, "no address available");
return CURLE_COULDNT_CONNECT;
}
/* create an IPv4 TCP socket */
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if(-1 == sockfd) {
failf(data, "couldn't create socket");
return CURLE_COULDNT_CONNECT; /* big time error */
}
if(conn->data->set.device) {
/* user selected to bind the outgoing socket to a specified "device"
before doing connect */
CURLcode res = bindlocal(conn, sockfd);
if(res)
return res;
}
/* Convert socket to non-blocking type */
Curl_nonblock(sockfd, TRUE);
/* This is the loop that attempts to connect to all IP-addresses we
know for the given host. One by one. */
for(rc=-1, aliasindex=0;
rc && (struct in_addr *)remotehost->addr->h_addr_list[aliasindex];
aliasindex++) {
struct sockaddr_in serv_addr;
/* do this nasty work to do the connect */
memset((char *) &serv_addr, '\0', sizeof(serv_addr));
memcpy((char *)&(serv_addr.sin_addr),
(struct in_addr *)remotehost->addr->h_addr_list[aliasindex],
sizeof(struct in_addr));
serv_addr.sin_family = remotehost->addr->h_addrtype;
serv_addr.sin_port = htons((unsigned short)port);
rc = connect(sockfd, (struct sockaddr *)&serv_addr,
sizeof(serv_addr));
if(-1 == rc) {
int error=Curl_ourerrno();
switch (error) {
case EINPROGRESS:
case EWOULDBLOCK:
#if defined(EAGAIN) && EAGAIN != EWOULDBLOCK
/* On some platforms EAGAIN and EWOULDBLOCK are the
* same value, and on others they are different, hence
* the odd #if
*/
case EAGAIN:
#endif
/* asynchronous connect, wait for connect or timeout */
if(data->state.used_interface == Curl_if_multi)
/* don't hang when doing multi */
timeout_ms = 0;
rc = waitconnect(sockfd, timeout_ms);
break;
default:
/* unknown error, fallthrough and try another address! */
failf(data, "Failed to connect to %s IP number %d: %d",
hostname, aliasindex+1, error);
break;
}
}
/* The '1 == rc' comes from the waitconnect(), and not from connect().
We can be sure of this since connect() cannot return 1. */
if((1 == rc) && (data->state.used_interface == Curl_if_multi)) {
/* Timeout when running the multi interface, we return here with a
CURLE_OK return code. */
rc = 0;
break;
}
if(0 == rc) {
int err = socketerror(sockfd);
if ((0 == err) || (EISCONN == err)) {
/* we are connected, awesome! */
*connected = TRUE; /* this is a true connect */
break;
}
/* nope, not connected for real */
rc = -1;
}
if(0 != rc) {
/* get a new timeout for next attempt */
after = Curl_tvnow();
timeout_ms -= Curl_tvdiff(after, before);
if(timeout_ms < 0) {
failf(data, "Connect timeout on IP number %d", aliasindex+1);
break;
}
before = after;
continue; /* try next address */
}
break;
}
if(0 != rc) {
/* no good connect was made */
sclose(sockfd);
*sockconn = -1;
failf(data, "Connect failed");
return CURLE_COULDNT_CONNECT;
}
/* leave the socket in non-blocking mode */
if(addr)
/* this is the address we've connected to */
*addr = (struct in_addr *)remotehost->addr->h_addr_list[aliasindex];
#endif
/* allow NULL-pointers to get passed in */
if(sockconn)
*sockconn = sockfd; /* the socket descriptor we've connected */
return CURLE_OK;
}