| /*************************************************************************** |
| * _ _ ____ _ |
| * Project ___| | | | _ \| | |
| * / __| | | | |_) | | |
| * | (__| |_| | _ <| |___ |
| * \___|\___/|_| \_\_____| |
| * |
| * Copyright (C) 1998 - 2003, 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 |
| * are also available at http://curl.haxx.se/docs/copyright.html. |
| * |
| * You may opt to use, copy, modify, merge, publish, distribute and/or sell |
| * copies of the Software, and permit persons to whom the Software is |
| * furnished to do so, under the terms of the COPYING file. |
| * |
| * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY |
| * KIND, either express or implied. |
| * |
| * $Id$ |
| ***************************************************************************/ |
| |
| #include "setup.h" |
| |
| #ifndef WIN32 |
| /* headers for non-win32 */ |
| #include <sys/time.h> |
| #include <sys/socket.h> |
| #include <sys/types.h> |
| #include <sys/ioctl.h> |
| #ifdef HAVE_UNISTD_H |
| #include <unistd.h> |
| #endif |
| #ifdef HAVE_NETDB_H |
| #include <netdb.h> |
| #endif |
| #ifdef HAVE_FCNTL_H |
| #include <fcntl.h> |
| #endif |
| #ifdef HAVE_NETINET_IN_H |
| #include <netinet/in.h> |
| #endif |
| #ifdef HAVE_ARPA_INET_H |
| #include <arpa/inet.h> |
| #endif |
| #ifdef HAVE_STDLIB_H |
| #include <stdlib.h> /* required for free() prototype, without it, this crashes |
| on macos 68K */ |
| #endif |
| #ifdef VMS |
| #include <in.h> |
| #include <inet.h> |
| #endif |
| |
| #endif |
| #include <stdio.h> |
| #include <errno.h> |
| #include <string.h> |
| |
| #ifndef TRUE |
| #define TRUE 1 |
| #define FALSE 0 |
| #endif |
| |
| #ifdef WIN32 |
| #define HAVE_IOCTLSOCKET |
| #include <windows.h> |
| #include <winsock.h> |
| #define EINPROGRESS WSAEINPROGRESS |
| #define EWOULDBLOCK WSAEWOULDBLOCK |
| #define EISCONN WSAEISCONN |
| #define ENOTSOCK WSAENOTSOCK |
| #endif |
| |
| #include "urldata.h" |
| #include "sendf.h" |
| #include "if2ip.h" |
| |
| /* The last #include file should be: */ |
| #ifdef CURLDEBUG |
| #include "memdebug.h" |
| #endif |
| |
| int Curl_ourerrno(void) |
| { |
| #ifdef WIN32 |
| return (int)GetLastError(); |
| #else |
| return errno; |
| #endif |
| } |
| |
| /************************************************************************* |
| * Curl_nonblock |
| * |
| * Description: |
| * Set the socket to either blocking or non-blocking mode. |
| */ |
| |
| int Curl_nonblock(int socket, /* operate on this */ |
| int nonblock /* TRUE or FALSE */) |
| { |
| #undef SETBLOCK |
| #ifdef HAVE_O_NONBLOCK |
| int flags; |
| |
| flags = fcntl(socket, F_GETFL, 0); |
| if (TRUE == nonblock) |
| return fcntl(socket, F_SETFL, flags | O_NONBLOCK); |
| else |
| return fcntl(socket, F_SETFL, flags & (~O_NONBLOCK)); |
| #define SETBLOCK 1 |
| #endif |
| |
| #ifdef HAVE_FIONBIO |
| int flags; |
| |
| flags = nonblock; |
| return ioctl(socket, FIONBIO, &flags); |
| #define SETBLOCK 2 |
| #endif |
| |
| #ifdef HAVE_IOCTLSOCKET |
| int flags; |
| flags = nonblock; |
| return ioctlsocket(socket, FIONBIO, &flags); |
| #define SETBLOCK 3 |
| #endif |
| |
| #ifdef HAVE_IOCTLSOCKET_CASE |
| return IoctlSocket(socket, FIONBIO, (long)nonblock); |
| #define SETBLOCK 4 |
| #endif |
| |
| #ifdef HAVE_DISABLED_NONBLOCKING |
| return 0; /* returns success */ |
| #define SETBLOCK 5 |
| #endif |
| |
| #ifndef SETBLOCK |
| #error "no non-blocking method was found/used/set" |
| #endif |
| } |
| |
| /* |
| * waitconnect() returns: |
| * 0 fine connect |
| * -1 select() error |
| * 1 select() timeout |
| * 2 select() returned with an error condition |
| */ |
| static |
| int waitconnect(int sockfd, /* socket */ |
| int timeout_msec) |
| { |
| fd_set fd; |
| fd_set errfd; |
| struct timeval interval; |
| int rc; |
| |
| /* now select() until we get connect or timeout */ |
| FD_ZERO(&fd); |
| FD_SET(sockfd, &fd); |
| |
| FD_ZERO(&errfd); |
| FD_SET(sockfd, &errfd); |
| |
| interval.tv_sec = timeout_msec/1000; |
| timeout_msec -= interval.tv_sec*1000; |
| |
| interval.tv_usec = timeout_msec*1000; |
| |
| rc = select(sockfd+1, NULL, &fd, &errfd, &interval); |
| if(-1 == rc) |
| /* error, no connect here, try next */ |
| return -1; |
| |
| else if(0 == rc) |
| /* timeout, no connect today */ |
| return 1; |
| |
| if(FD_ISSET(sockfd, &errfd)) |
| /* error condition caught */ |
| return 2; |
| |
| /* we have a connect! */ |
| return 0; |
| } |
| |
| static CURLcode bindlocal(struct connectdata *conn, |
| int sockfd) |
| { |
| #ifdef HAVE_INET_NTOA |
| |
| struct SessionHandle *data = conn->data; |
| |
| /************************************************************* |
| * Select device to bind socket to |
| *************************************************************/ |
| if (strlen(data->set.device)<255) { |
| struct sockaddr_in sa; |
| struct Curl_dns_entry *h=NULL; |
| size_t size; |
| char myhost[256] = ""; |
| in_addr_t in; |
| int rc; |
| |
| /* First check if the given name is an IP address */ |
| in=inet_addr(data->set.device); |
| |
| if((in == CURL_INADDR_NONE) && |
| Curl_if2ip(data->set.device, myhost, sizeof(myhost))) { |
| /* |
| * We now have the numerical IPv4-style x.y.z.w in the 'myhost' buffer |
| */ |
| rc = Curl_resolv(conn, myhost, 0, &h); |
| if(rc == 1) |
| rc = Curl_wait_for_resolv(conn, &h); |
| |
| } |
| else { |
| if(strlen(data->set.device)>1) { |
| /* |
| * This was not an interface, resolve the name as a host name |
| * or IP number |
| */ |
| rc = Curl_resolv(conn, data->set.device, 0, &h); |
| if(rc == 1) |
| rc = Curl_wait_for_resolv(conn, &h); |
| |
| if(h) |
| /* we know data->set.device is shorter than the myhost array */ |
| strcpy(myhost, data->set.device); |
| |
| } |
| } |
| |
| if(! *myhost) { |
| /* need to fix this |
| h=Curl_gethost(data, |
| getmyhost(*myhost,sizeof(myhost)), |
| hostent_buf, |
| sizeof(hostent_buf)); |
| */ |
| return CURLE_HTTP_PORT_FAILED; |
| } |
| |
| infof(data, "We bind local end to %s\n", myhost); |
| |
| in=inet_addr(myhost); |
| if (CURL_INADDR_NONE != in) { |
| |
| if ( h ) { |
| Curl_addrinfo *addr = h->addr; |
| |
| Curl_resolv_unlock(data, h); |
| /* we don't need it anymore after this function has returned */ |
| |
| #ifdef ENABLE_IPV6 |
| (void)sa; /* prevent compiler warning */ |
| if( bind(sockfd, addr->ai_addr, addr->ai_addrlen) >= 0) { |
| /* we succeeded to bind */ |
| struct sockaddr_in6 add; |
| |
| size = sizeof(add); |
| if(getsockname(sockfd, (struct sockaddr *) &add, |
| (socklen_t *)&size)<0) { |
| failf(data, "getsockname() failed"); |
| return CURLE_HTTP_PORT_FAILED; |
| } |
| } |
| #else |
| memset((char *)&sa, 0, sizeof(sa)); |
| memcpy((char *)&sa.sin_addr, addr->h_addr, addr->h_length); |
| sa.sin_family = AF_INET; |
| sa.sin_addr.s_addr = in; |
| sa.sin_port = 0; /* get any port */ |
| |
| if( bind(sockfd, (struct sockaddr *)&sa, sizeof(sa)) >= 0) { |
| /* we succeeded to bind */ |
| struct sockaddr_in add; |
| |
| size = sizeof(add); |
| if(getsockname(sockfd, (struct sockaddr *) &add, |
| (socklen_t *)&size)<0) { |
| failf(data, "getsockname() failed"); |
| return CURLE_HTTP_PORT_FAILED; |
| } |
| } |
| #endif |
| else { |
| switch(errno) { |
| case EBADF: |
| failf(data, "Invalid descriptor: %d", errno); |
| break; |
| case EINVAL: |
| failf(data, "Invalid request: %d", errno); |
| break; |
| case EACCES: |
| failf(data, "Address is protected, user not superuser: %d", errno); |
| break; |
| case ENOTSOCK: |
| failf(data, |
| "Argument is a descriptor for a file, not a socket: %d", |
| errno); |
| break; |
| case EFAULT: |
| failf(data, "Inaccessable memory error: %d", errno); |
| break; |
| case ENAMETOOLONG: |
| failf(data, "Address too long: %d", errno); |
| break; |
| case ENOMEM: |
| failf(data, "Insufficient kernel memory was available: %d", errno); |
| break; |
| default: |
| failf(data, "errno %d", errno); |
| break; |
| } /* end of switch(errno) */ |
| |
| return CURLE_HTTP_PORT_FAILED; |
| } /* end of else */ |
| |
| } /* end of if h */ |
| else { |
| failf(data,"could't find my own IP address (%s)", myhost); |
| return CURLE_HTTP_PORT_FAILED; |
| } |
| } /* end of inet_addr */ |
| |
| else { |
| failf(data, "could't find my own IP address (%s)", myhost); |
| return CURLE_HTTP_PORT_FAILED; |
| } |
| |
| return CURLE_OK; |
| |
| } /* end of device selection support */ |
| #endif /* end of HAVE_INET_NTOA */ |
| |
| return CURLE_HTTP_PORT_FAILED; |
| } |
| |
| |
| static |
| int socketerror(int sockfd) |
| { |
| int err = 0; |
| socklen_t errSize = sizeof(err); |
| |
| if( -1 == getsockopt(sockfd, SOL_SOCKET, SO_ERROR, |
| (void *)&err, &errSize)) |
| err = Curl_ourerrno(); |
| |
| return err; |
| } |
| |
| /* |
| * Curl_is_connected() is used from the multi interface to check if the |
| * firstsocket has connected. |
| */ |
| |
| CURLcode Curl_is_connected(struct connectdata *conn, |
| int sockfd, |
| bool *connected) |
| { |
| int rc; |
| struct SessionHandle *data = conn->data; |
| |
| *connected = FALSE; /* a very negative world view is best */ |
| |
| if(data->set.timeout || data->set.connecttimeout) { |
| /* there is a timeout set */ |
| |
| /* Evaluate in milliseconds how much time that has passed */ |
| long has_passed = Curl_tvdiff(Curl_tvnow(), data->progress.start); |
| |
| /* subtract the most strict timeout of the ones */ |
| if(data->set.timeout && data->set.connecttimeout) { |
| if (data->set.timeout < data->set.connecttimeout) |
| has_passed -= data->set.timeout*1000; |
| else |
| has_passed -= data->set.connecttimeout*1000; |
| } |
| else if(data->set.timeout) |
| has_passed -= data->set.timeout*1000; |
| else |
| has_passed -= data->set.connecttimeout*1000; |
| |
| if(has_passed > 0 ) { |
| /* time-out, bail out, go home */ |
| failf(data, "Connection time-out"); |
| return CURLE_OPERATION_TIMEOUTED; |
| } |
| } |
| if(conn->bits.tcpconnect) { |
| /* we are connected already! */ |
| *connected = TRUE; |
| return CURLE_OK; |
| } |
| |
| /* check for connect without timeout as we want to return immediately */ |
| rc = waitconnect(sockfd, 0); |
| |
| if(0 == rc) { |
| int err = socketerror(sockfd); |
| if ((0 == err) || (EISCONN == err)) { |
| /* we are connected, awesome! */ |
| *connected = TRUE; |
| return CURLE_OK; |
| } |
| /* nope, not connected for real */ |
| failf(data, "Connection failed, socket error: %d", err); |
| return CURLE_COULDNT_CONNECT; |
| } |
| else if(1 != rc) { |
| int error = Curl_ourerrno(); |
| failf(data, "Failed connect to %s:%d, errno: %d", |
| conn->hostname, conn->port, error); |
| return CURLE_COULDNT_CONNECT; |
| } |
| /* |
| * If the connection phase is "done" here, we should attempt to connect |
| * to the "next address" in the Curl_hostaddr structure that we resolved |
| * before. But we don't have that struct around anymore and we can't just |
| * keep a pointer since the cache might in fact have gotten pruned by the |
| * time we want to read this... Alas, we don't do this yet. |
| */ |
| |
| return CURLE_OK; |
| } |
| |
| |
| /* |
| * TCP connect to the given host with timeout, proxy or remote doesn't matter. |
| * There might be more than one IP address to try out. Fill in the passed |
| * pointer with the connected socket. |
| */ |
| |
| 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; |
| } |
| |
