static CURLcode bindlocal(struct connectdata *conn,
curl_socket_t sockfd, int af)
{
struct SessionHandle *data = conn->data;
struct Curl_sockaddr_storage sa;
struct sockaddr *sock = (struct sockaddr *)&sa; /* bind to this address */
curl_socklen_t sizeof_sa = 0; /* size of the data sock points to */
struct sockaddr_in *si4 = (struct sockaddr_in *)&sa;
#ifdef ENABLE_IPV6
struct sockaddr_in6 *si6 = (struct sockaddr_in6 *)&sa;
#endif
struct Curl_dns_entry *h=NULL;
unsigned short port = data->set.localport; /* use this port number, 0 for
"random" */
/* how many port numbers to try to bind to, increasing one at a time */
int portnum = data->set.localportrange;
const char *dev = data->set.str[STRING_DEVICE];
int error;
char myhost[256] = "";
int done = 0; /* -1 for error, 1 for address found */
/*************************************************************
* Select device to bind socket to
*************************************************************/
if ( !dev && !port )
/* no local kind of binding was requested */
return CURLE_OK;
memset(&sa, 0, sizeof(struct Curl_sockaddr_storage));
if(dev && (strlen(dev)<255) ) {
/* interface */
if(Curl_if2ip(af, dev, myhost, sizeof(myhost))) {
/*
* We now have the numerical IP address in the 'myhost' buffer
*/
infof(data, "Local Interface %s is ip %s using address family %i\n",
dev, myhost, af);
done = 1;
#ifdef SO_BINDTODEVICE
/* I am not sure any other OSs than Linux that provide this feature, and
* at the least I cannot test. --Ben
*
* This feature allows one to tightly bind the local socket to a
* particular interface. This will force even requests to other local
* interfaces to go out the external interface.
*
*
* Only bind to the interface when specified as interface, not just as a
* hostname or ip address.
*/
if(setsockopt(sockfd, SOL_SOCKET, SO_BINDTODEVICE,
dev, (curl_socklen_t)strlen(dev)+1) != 0) {
error = SOCKERRNO;
infof(data, "SO_BINDTODEVICE %s failed with errno %d: %s;"
" will do regular bind\n",
dev, error, Curl_strerror(conn, error));
/* This is typically "errno 1, error: Operation not permitted" if
you're not running as root or another suitable privileged user */
}
#endif
}
else {
/*
* This was not an interface, resolve the name as a host name
* or IP number
*
* Temporarily force name resolution to use only the address type
* of the connection. The resolve functions should really be changed
* to take a type parameter instead.
*/
long ipver = data->set.ip_version;
int rc;
if (af == AF_INET)
data->set.ip_version = CURL_IPRESOLVE_V4;
#ifdef ENABLE_IPV6
else if (af == AF_INET6)
data->set.ip_version = CURL_IPRESOLVE_V6;
#endif
rc = Curl_resolv(conn, dev, 0, &h);
if(rc == CURLRESOLV_PENDING)
(void)Curl_wait_for_resolv(conn, &h);
data->set.ip_version = ipver;
if(h) {
/* convert the resolved address, sizeof myhost >= INET_ADDRSTRLEN */
Curl_printable_address(h->addr, myhost, sizeof(myhost));
infof(data, "Name '%s' family %i resolved to '%s' family %i\n",
dev, af, myhost, h->addr->ai_family);
Curl_resolv_unlock(data, h);
done = 1;
}
else {
/*
* provided dev was no interface (or interfaces are not supported
* e.g. solaris) no ip address and no domain we fail here
*/
done = -1;
}
}
if(done > 0) {
#ifdef ENABLE_IPV6
/* ipv6 address */
if((af == AF_INET6) &&
(Curl_inet_pton(AF_INET6, myhost, &si6->sin6_addr) > 0)) {
si6->sin6_family = AF_INET6;
si6->sin6_port = htons(port);
sizeof_sa = sizeof(struct sockaddr_in6);
}
else
#endif
/* ipv4 address */
if((af == AF_INET) &&
(Curl_inet_pton(AF_INET, myhost, &si4->sin_addr) > 0)) {
si4->sin_family = AF_INET;
si4->sin_port = htons(port);
sizeof_sa = sizeof(struct sockaddr_in);
}
}
if(done < 1) {
failf(data, "Couldn't bind to '%s'", dev);
return CURLE_INTERFACE_FAILED;
}
}
else {
/* no device was given, prepare sa to match af's needs */
#ifdef ENABLE_IPV6
if ( af == AF_INET6 ) {
si6->sin6_family = AF_INET6;
si6->sin6_port = htons(port);
sizeof_sa = sizeof(struct sockaddr_in6);
}
else
#endif
if ( af == AF_INET ) {
si4->sin_family = AF_INET;
si4->sin_port = htons(port);
sizeof_sa = sizeof(struct sockaddr_in);
}
}
for(;;) {
if( bind(sockfd, sock, sizeof_sa) >= 0) {
/* we succeeded to bind */
struct Curl_sockaddr_storage add;
curl_socklen_t size = sizeof(add);
memset(&add, 0, sizeof(struct Curl_sockaddr_storage));
if(getsockname(sockfd, (struct sockaddr *) &add, &size) < 0) {
data->state.os_errno = error = SOCKERRNO;
failf(data, "getsockname() failed with errno %d: %s",
error, Curl_strerror(conn, error));
return CURLE_INTERFACE_FAILED;
}
infof(data, "Local port: %hu\n", port);
conn->bits.bound = TRUE;
return CURLE_OK;
}
if(--portnum > 0) {
infof(data, "Bind to local port %hu failed, trying next\n", port);
port++; /* try next port */
/* We re-use/clobber the port variable here below */
if(sock->sa_family == AF_INET)
si4->sin_port = ntohs(port);
#ifdef ENABLE_IPV6
else
si6->sin6_port = ntohs(port);
#endif
}
else
break;
}
data->state.os_errno = error = SOCKERRNO;
failf(data, "bind failed with errno %d: %s",
error, Curl_strerror(conn, error));
return CURLE_INTERFACE_FAILED;
}
static CURLcode bindlocal(struct connectdata *conn,
curl_socket_t sockfd)
{
struct SessionHandle *data = conn->data;
struct sockaddr_in me;
struct sockaddr *sock = NULL; /* bind to this address */
socklen_t socksize; /* size of the data sock points to */
unsigned short port = data->set.localport; /* use this port number, 0 for
"random" */
/* how many port numbers to try to bind to, increasing one at a time */
int portnum = data->set.localportrange;
/*************************************************************
* Select device to bind socket to
*************************************************************/
if (data->set.device && (strlen(data->set.device)<255) ) {
struct Curl_dns_entry *h=NULL;
char myhost[256] = "";
in_addr_t in;
int rc;
bool was_iface = FALSE;
/* 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 == CURLRESOLV_PENDING)
(void)Curl_wait_for_resolv(conn, &h);
if(h) {
was_iface = TRUE;
Curl_resolv_unlock(data, h);
}
}
if(!was_iface) {
/*
* 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 == CURLRESOLV_PENDING)
(void)Curl_wait_for_resolv(conn, &h);
if(h) {
if(in == CURL_INADDR_NONE)
/* convert the resolved address, sizeof myhost >= INET_ADDRSTRLEN */
Curl_inet_ntop(h->addr->ai_addr->sa_family,
&((struct sockaddr_in*)h->addr->ai_addr)->sin_addr,
myhost, sizeof myhost);
else
/* we know data->set.device is shorter than the myhost array */
strcpy(myhost, data->set.device);
Curl_resolv_unlock(data, h);
}
}
if(! *myhost) {
/* need to fix this
h=Curl_gethost(data,
getmyhost(*myhost,sizeof(myhost)),
hostent_buf,
sizeof(hostent_buf));
*/
failf(data, "Couldn't bind to '%s'", data->set.device);
return CURLE_HTTP_PORT_FAILED;
}
infof(data, "Bind local address to %s\n", myhost);
#ifdef SO_BINDTODEVICE
/* I am not sure any other OSs than Linux that provide this feature, and
* at the least I cannot test. --Ben
*
* This feature allows one to tightly bind the local socket to a
* particular interface. This will force even requests to other local
* interfaces to go out the external interface.
*
*/
if (was_iface) {
/* Only bind to the interface when specified as interface, not just as a
* hostname or ip address.
*/
if (setsockopt(sockfd, SOL_SOCKET, SO_BINDTODEVICE,
data->set.device, strlen(data->set.device)+1) != 0) {
/* printf("Failed to BINDTODEVICE, socket: %d device: %s error: %s\n",
sockfd, data->set.device, Curl_strerror(Curl_sockerrno())); */
infof(data, "SO_BINDTODEVICE %s failed\n",
data->set.device);
/* This is typically "errno 1, error: Operation not permitted" if
you're not running as root or another suitable privileged user */
}
}
#endif
in=inet_addr(myhost);
if (CURL_INADDR_NONE == in) {
failf(data,"couldn't find my own IP address (%s)", myhost);
return CURLE_HTTP_PORT_FAILED;
} /* end of inet_addr */
if ( h ) {
Curl_addrinfo *addr = h->addr;
sock = addr->ai_addr;
socksize = addr->ai_addrlen;
}
else
return CURLE_HTTP_PORT_FAILED;
}
else if(port) {
/* if a local port number is requested but no local IP, extract the
address from the socket */
memset(&me, 0, sizeof(struct sockaddr));
me.sin_family = AF_INET;
me.sin_addr.s_addr = INADDR_ANY;
sock = (struct sockaddr *)&me;
socksize = sizeof(struct sockaddr);
}
else
/* no local kind of binding was requested */
return CURLE_OK;
do {
/* Set port number to bind to, 0 makes the system pick one */
if(sock->sa_family == AF_INET)
((struct sockaddr_in *)sock)->sin_port = htons(port);
#ifdef ENABLE_IPV6
else
((struct sockaddr_in6 *)sock)->sin6_port = htons(port);
#endif
if( bind(sockfd, sock, socksize) >= 0) {
/* we succeeded to bind */
struct Curl_sockaddr_storage add;
size_t size;
size = sizeof(add);
if(getsockname(sockfd, (struct sockaddr *) &add,
(socklen_t *)&size)<0) {
failf(data, "getsockname() failed");
return CURLE_HTTP_PORT_FAILED;
}
/* We re-use/clobber the port variable here below */
if(((struct sockaddr *)&add)->sa_family == AF_INET)
port = ntohs(((struct sockaddr_in *)&add)->sin_port);
#ifdef ENABLE_IPV6
else
port = ntohs(((struct sockaddr_in6 *)&add)->sin6_port);
#endif
infof(data, "Local port: %d\n", port);
return CURLE_OK;
}
if(--portnum > 0) {
infof(data, "Bind to local port %d failed, trying next\n", port);
port++; /* try next port */
}
else
break;
} while(1);
data->state.os_errno = Curl_sockerrno();
failf(data, "bind failure: %s",
Curl_strerror(conn, data->state.os_errno));
return CURLE_HTTP_PORT_FAILED;
}
/*
* This function logs in to a SOCKS4 proxy and sends the specifics to the final
* destination server.
*
* Reference :
* http://socks.permeo.com/protocol/socks4.protocol
*
* Note :
* Set protocol4a=true for "SOCKS 4A (Simple Extension to SOCKS 4 Protocol)"
* Nonsupport "Identification Protocol (RFC1413)"
*/
CURLcode Curl_SOCKS4(const char *proxy_name,
const char *hostname,
int remote_port,
int sockindex,
struct connectdata *conn,
bool protocol4a)
{
#define SOCKS4REQLEN 262
unsigned char socksreq[SOCKS4REQLEN]; /* room for SOCKS4 request incl. user
id */
int result;
CURLcode code;
curl_socket_t sock = conn->sock[sockindex];
long timeout;
struct SessionHandle *data = conn->data;
/* get timeout */
timeout = Curl_timeleft(conn, NULL, TRUE);
if(timeout < 0) {
/* time-out, bail out, go home */
failf(data, "Connection time-out");
return CURLE_OPERATION_TIMEDOUT;
}
Curl_nonblock(sock, FALSE);
/*
* Compose socks4 request
*
* Request format
*
* +----+----+----+----+----+----+----+----+----+----+....+----+
* | VN | CD | DSTPORT | DSTIP | USERID |NULL|
* +----+----+----+----+----+----+----+----+----+----+....+----+
* # of bytes: 1 1 2 4 variable 1
*/
socksreq[0] = 4; /* version (SOCKS4) */
socksreq[1] = 1; /* connect */
*((unsigned short*)&socksreq[2]) = htons((unsigned short)remote_port);
/* DNS resolve only for SOCKS4, not SOCKS4a */
if (!protocol4a) {
struct Curl_dns_entry *dns;
Curl_addrinfo *hp=NULL;
int rc;
rc = Curl_resolv(conn, hostname, remote_port, &dns);
if(rc == CURLRESOLV_ERROR)
return CURLE_COULDNT_RESOLVE_PROXY;
if(rc == CURLRESOLV_PENDING)
/* this requires that we're in "wait for resolve" state */
rc = Curl_wait_for_resolv(conn, &dns);
/*
* We cannot use 'hostent' as a struct that Curl_resolv() returns. It
* returns a Curl_addrinfo pointer that may not always look the same.
*/
if(dns)
hp=dns->addr;
if(hp) {
char buf[64];
unsigned short ip[4];
Curl_printable_address(hp, buf, sizeof(buf));
if(4 == sscanf( buf, "%hu.%hu.%hu.%hu",
&ip[0], &ip[1], &ip[2], &ip[3])) {
/* Set DSTIP */
socksreq[4] = (unsigned char)ip[0];
socksreq[5] = (unsigned char)ip[1];
socksreq[6] = (unsigned char)ip[2];
socksreq[7] = (unsigned char)ip[3];
}
else
hp = NULL; /* fail! */
Curl_resolv_unlock(data, dns); /* not used anymore from now on */
}
if(!hp) {
failf(data, "Failed to resolve \"%s\" for SOCKS4 connect.",
hostname);
return CURLE_COULDNT_RESOLVE_HOST;
}
}
/*
* This is currently not supporting "Identification Protocol (RFC1413)".
*/
socksreq[8] = 0; /* ensure empty userid is NUL-terminated */
if(proxy_name)
strlcat((char*)socksreq + 8, proxy_name, sizeof(socksreq) - 8);
/*
* Make connection
*/
{
ssize_t actualread;
ssize_t written;
ssize_t hostnamelen = 0;
int packetsize = 9 +
(int)strlen((char*)socksreq + 8); /* size including NUL */
/* If SOCKS4a, set special invalid IP address 0.0.0.x */
if (protocol4a) {
socksreq[4] = 0;
socksreq[5] = 0;
socksreq[6] = 0;
socksreq[7] = 1;
/* If still enough room in buffer, also append hostname */
hostnamelen = (ssize_t)strlen(hostname) + 1; /* length including NUL */
if (packetsize + hostnamelen <= SOCKS4REQLEN)
strcpy((char*)socksreq + packetsize, hostname);
else
hostnamelen = 0; /* Flag: hostname did not fit in buffer */
}
/* Send request */
code = Curl_write_plain(conn, sock, (char *)socksreq,
packetsize + hostnamelen,
&written);
if((code != CURLE_OK) || (written != packetsize + hostnamelen)) {
failf(data, "Failed to send SOCKS4 connect request.");
return CURLE_COULDNT_CONNECT;
}
if (protocol4a && hostnamelen == 0) {
/* SOCKS4a with very long hostname - send that name separately */
hostnamelen = (ssize_t)strlen(hostname) + 1;
code = Curl_write_plain(conn, sock, (char *)hostname, hostnamelen,
&written);
if((code != CURLE_OK) || (written != hostnamelen)) {
failf(data, "Failed to send SOCKS4 connect request.");
return CURLE_COULDNT_CONNECT;
}
}
packetsize = 8; /* receive data size */
/* Receive response */
result = blockread_all(conn, sock, (char *)socksreq, packetsize,
&actualread, timeout);
if((result != CURLE_OK) || (actualread != packetsize)) {
failf(data, "Failed to receive SOCKS4 connect request ack.");
return CURLE_COULDNT_CONNECT;
}
/*
* Response format
*
* +----+----+----+----+----+----+----+----+
* | VN | CD | DSTPORT | DSTIP |
* +----+----+----+----+----+----+----+----+
* # of bytes: 1 1 2 4
*
* VN is the version of the reply code and should be 0. CD is the result
* code with one of the following values:
*
* 90: request granted
* 91: request rejected or failed
* 92: request rejected because SOCKS server cannot connect to
* identd on the client
* 93: request rejected because the client program and identd
* report different user-ids
*/
/* wrong version ? */
if(socksreq[0] != 0) {
failf(data,
"SOCKS4 reply has wrong version, version should be 4.");
return CURLE_COULDNT_CONNECT;
}
/* Result */
switch(socksreq[1])
{
case 90:
if (protocol4a)
infof(data, "SOCKS4a request granted.\n");
else
infof(data, "SOCKS4 request granted.\n");
break;
case 91:
failf(data,
"Can't complete SOCKS4 connection to %d.%d.%d.%d:%d. (%d)"
", request rejected or failed.",
(unsigned char)socksreq[4], (unsigned char)socksreq[5],
(unsigned char)socksreq[6], (unsigned char)socksreq[7],
(unsigned int)ntohs(*(unsigned short*)(&socksreq[8])),
socksreq[1]);
return CURLE_COULDNT_CONNECT;
case 92:
failf(data,
"Can't complete SOCKS4 connection to %d.%d.%d.%d:%d. (%d)"
", request rejected because SOCKS server cannot connect to "
"identd on the client.",
(unsigned char)socksreq[4], (unsigned char)socksreq[5],
(unsigned char)socksreq[6], (unsigned char)socksreq[7],
(unsigned int)ntohs(*(unsigned short*)(&socksreq[8])),
socksreq[1]);
return CURLE_COULDNT_CONNECT;
case 93:
failf(data,
"Can't complete SOCKS4 connection to %d.%d.%d.%d:%d. (%d)"
", request rejected because the client program and identd "
"report different user-ids.",
(unsigned char)socksreq[4], (unsigned char)socksreq[5],
(unsigned char)socksreq[6], (unsigned char)socksreq[7],
(unsigned int)ntohs(*(unsigned short*)(&socksreq[8])),
socksreq[1]);
return CURLE_COULDNT_CONNECT;
default:
failf(data,
"Can't complete SOCKS4 connection to %d.%d.%d.%d:%d. (%d)"
", Unknown.",
(unsigned char)socksreq[4], (unsigned char)socksreq[5],
(unsigned char)socksreq[6], (unsigned char)socksreq[7],
(unsigned int)ntohs(*(unsigned short*)(&socksreq[8])),
socksreq[1]);
return CURLE_COULDNT_CONNECT;
}
}
Curl_nonblock(sock, TRUE);
return CURLE_OK; /* Proxy was successful! */
}
/*
* This function logs in to a SOCKS5 proxy and sends the specifics to the final
* destination server.
*/
CURLcode Curl_SOCKS5(const char *proxy_name,
const char *proxy_password,
const char *hostname,
int remote_port,
int sockindex,
struct connectdata *conn)
{
/*
According to the RFC1928, section "6. Replies". This is what a SOCK5
replies:
+----+-----+-------+------+----------+----------+
|VER | REP | RSV | ATYP | BND.ADDR | BND.PORT |
+----+-----+-------+------+----------+----------+
| 1 | 1 | X'00' | 1 | Variable | 2 |
+----+-----+-------+------+----------+----------+
Where:
o VER protocol version: X'05'
o REP Reply field:
o X'00' succeeded
*/
unsigned char socksreq[600]; /* room for large user/pw (255 max each) */
ssize_t actualread;
ssize_t written;
int result;
CURLcode code;
curl_socket_t sock = conn->sock[sockindex];
struct SessionHandle *data = conn->data;
long timeout;
bool socks5_resolve_local = (bool)(data->set.proxytype == CURLPROXY_SOCKS5);
const size_t hostname_len = strlen(hostname);
ssize_t packetsize = 0;
/* RFC1928 chapter 5 specifies max 255 chars for domain name in packet */
if(!socks5_resolve_local && hostname_len > 255)
{
infof(conn->data,"SOCKS5: server resolving disabled for hostnames of "
"length > 255 [actual len=%d]\n", hostname_len);
socks5_resolve_local = TRUE;
}
/* get timeout */
timeout = Curl_timeleft(conn, NULL, TRUE);
if(timeout < 0) {
/* time-out, bail out, go home */
failf(data, "Connection time-out");
return CURLE_OPERATION_TIMEDOUT;
}
Curl_nonblock(sock, TRUE);
/* wait until socket gets connected */
result = Curl_socket_ready(CURL_SOCKET_BAD, sock, (int)timeout);
if(-1 == result) {
failf(conn->data, "SOCKS5: no connection here");
return CURLE_COULDNT_CONNECT;
}
else if(0 == result) {
failf(conn->data, "SOCKS5: connection timeout");
return CURLE_OPERATION_TIMEDOUT;
}
if(result & CURL_CSELECT_ERR) {
failf(conn->data, "SOCKS5: error occured during connection");
return CURLE_COULDNT_CONNECT;
}
socksreq[0] = 5; /* version */
socksreq[1] = (char)(proxy_name ? 2 : 1); /* number of methods (below) */
socksreq[2] = 0; /* no authentication */
socksreq[3] = 2; /* username/password */
Curl_nonblock(sock, FALSE);
code = Curl_write_plain(conn, sock, (char *)socksreq, (2 + (int)socksreq[1]),
&written);
if((code != CURLE_OK) || (written != (2 + (int)socksreq[1]))) {
failf(data, "Unable to send initial SOCKS5 request.");
return CURLE_COULDNT_CONNECT;
}
Curl_nonblock(sock, TRUE);
result = Curl_socket_ready(sock, CURL_SOCKET_BAD, (int)timeout);
if(-1 == result) {
failf(conn->data, "SOCKS5 nothing to read");
return CURLE_COULDNT_CONNECT;
}
else if(0 == result) {
failf(conn->data, "SOCKS5 read timeout");
return CURLE_OPERATION_TIMEDOUT;
}
if(result & CURL_CSELECT_ERR) {
failf(conn->data, "SOCKS5 read error occured");
return CURLE_RECV_ERROR;
}
Curl_nonblock(sock, FALSE);
result=blockread_all(conn, sock, (char *)socksreq, 2, &actualread, timeout);
if((result != CURLE_OK) || (actualread != 2)) {
failf(data, "Unable to receive initial SOCKS5 response.");
return CURLE_COULDNT_CONNECT;
}
if(socksreq[0] != 5) {
failf(data, "Received invalid version in initial SOCKS5 response.");
return CURLE_COULDNT_CONNECT;
}
if(socksreq[1] == 0) {
/* Nothing to do, no authentication needed */
;
}
else if(socksreq[1] == 2) {
/* Needs user name and password */
size_t userlen, pwlen;
int len;
if(proxy_name && proxy_password) {
userlen = strlen(proxy_name);
pwlen = strlen(proxy_password);
}
else {
userlen = 0;
pwlen = 0;
}
/* username/password request looks like
* +----+------+----------+------+----------+
* |VER | ULEN | UNAME | PLEN | PASSWD |
* +----+------+----------+------+----------+
* | 1 | 1 | 1 to 255 | 1 | 1 to 255 |
* +----+------+----------+------+----------+
*/
len = 0;
socksreq[len++] = 1; /* username/pw subnegotiation version */
socksreq[len++] = (char) userlen;
memcpy(socksreq + len, proxy_name, (int) userlen);
len += userlen;
socksreq[len++] = (char) pwlen;
memcpy(socksreq + len, proxy_password, (int) pwlen);
len += pwlen;
code = Curl_write_plain(conn, sock, (char *)socksreq, len, &written);
if((code != CURLE_OK) || (len != written)) {
failf(data, "Failed to send SOCKS5 sub-negotiation request.");
return CURLE_COULDNT_CONNECT;
}
result=blockread_all(conn, sock, (char *)socksreq, 2, &actualread,
timeout);
if((result != CURLE_OK) || (actualread != 2)) {
failf(data, "Unable to receive SOCKS5 sub-negotiation response.");
return CURLE_COULDNT_CONNECT;
}
/* ignore the first (VER) byte */
if(socksreq[1] != 0) { /* status */
failf(data, "User was rejected by the SOCKS5 server (%d %d).",
socksreq[0], socksreq[1]);
return CURLE_COULDNT_CONNECT;
}
/* Everything is good so far, user was authenticated! */
}
else {
/* error */
if(socksreq[1] == 1) {
failf(data,
"SOCKS5 GSSAPI per-message authentication is not supported.");
return CURLE_COULDNT_CONNECT;
}
else if(socksreq[1] == 255) {
if(!proxy_name || !*proxy_name) {
failf(data,
"No authentication method was acceptable. (It is quite likely"
" that the SOCKS5 server wanted a username/password, since none"
" was supplied to the server on this connection.)");
}
else {
failf(data, "No authentication method was acceptable.");
}
return CURLE_COULDNT_CONNECT;
}
else {
failf(data,
"Undocumented SOCKS5 mode attempted to be used by server.");
return CURLE_COULDNT_CONNECT;
}
}
/* Authentication is complete, now specify destination to the proxy */
socksreq[0] = 5; /* version (SOCKS5) */
socksreq[1] = 1; /* connect */
socksreq[2] = 0; /* must be zero */
if(!socks5_resolve_local) {
packetsize = (ssize_t)(5 + hostname_len + 2);
socksreq[3] = 3; /* ATYP: domain name = 3 */
socksreq[4] = (char) hostname_len; /* address length */
memcpy(&socksreq[5], hostname, hostname_len); /* address bytes w/o NULL */
*((unsigned short*)&socksreq[hostname_len+5]) =
htons((unsigned short)remote_port);
}
else {
struct Curl_dns_entry *dns;
Curl_addrinfo *hp=NULL;
int rc = Curl_resolv(conn, hostname, remote_port, &dns);
packetsize = 10;
socksreq[3] = 1; /* IPv4 = 1 */
if(rc == CURLRESOLV_ERROR)
return CURLE_COULDNT_RESOLVE_HOST;
if(rc == CURLRESOLV_PENDING)
/* this requires that we're in "wait for resolve" state */
rc = Curl_wait_for_resolv(conn, &dns);
/*
* We cannot use 'hostent' as a struct that Curl_resolv() returns. It
* returns a Curl_addrinfo pointer that may not always look the same.
*/
if(dns)
hp=dns->addr;
if(hp) {
char buf[64];
unsigned short ip[4];
Curl_printable_address(hp, buf, sizeof(buf));
if(4 == sscanf( buf, "%hu.%hu.%hu.%hu",
&ip[0], &ip[1], &ip[2], &ip[3])) {
socksreq[4] = (unsigned char)ip[0];
socksreq[5] = (unsigned char)ip[1];
socksreq[6] = (unsigned char)ip[2];
socksreq[7] = (unsigned char)ip[3];
}
else
hp = NULL; /* fail! */
Curl_resolv_unlock(data, dns); /* not used anymore from now on */
}
if(!hp) {
failf(data, "Failed to resolve \"%s\" for SOCKS5 connect.",
hostname);
return CURLE_COULDNT_RESOLVE_HOST;
}
*((unsigned short*)&socksreq[8]) = htons((unsigned short)remote_port);
}
code = Curl_write_plain(conn, sock, (char *)socksreq, packetsize, &written);
if((code != CURLE_OK) || (written != packetsize)) {
failf(data, "Failed to send SOCKS5 connect request.");
return CURLE_COULDNT_CONNECT;
}
packetsize = 10; /* minimum packet size is 10 */
result = blockread_all(conn, sock, (char *)socksreq, packetsize,
&actualread, timeout);
if((result != CURLE_OK) || (actualread != packetsize)) {
failf(data, "Failed to receive SOCKS5 connect request ack.");
return CURLE_COULDNT_CONNECT;
}
if(socksreq[0] != 5) { /* version */
failf(data,
"SOCKS5 reply has wrong version, version should be 5.");
return CURLE_COULDNT_CONNECT;
}
if(socksreq[1] != 0) { /* Anything besides 0 is an error */
failf(data,
"Can't complete SOCKS5 connection to %d.%d.%d.%d:%d. (%d)",
(unsigned char)socksreq[4], (unsigned char)socksreq[5],
(unsigned char)socksreq[6], (unsigned char)socksreq[7],
(unsigned int)ntohs(*(unsigned short*)(&socksreq[8])),
socksreq[1]);
return CURLE_COULDNT_CONNECT;
}
/* Fix: in general, returned BND.ADDR is variable length parameter by RFC
1928, so the reply packet should be read until the end to avoid errors at
subsequent protocol level.
+----+-----+-------+------+----------+----------+
|VER | REP | RSV | ATYP | BND.ADDR | BND.PORT |
+----+-----+-------+------+----------+----------+
| 1 | 1 | X'00' | 1 | Variable | 2 |
+----+-----+-------+------+----------+----------+
ATYP:
o IP v4 address: X'01', BND.ADDR = 4 byte
o domain name: X'03', BND.ADDR = [ 1 byte length, string ]
o IP v6 address: X'04', BND.ADDR = 16 byte
*/
/* Calculate real packet size */
if(socksreq[3] == 3) {
/* domain name */
int addrlen = (int) socksreq[4];
packetsize = 5 + addrlen + 2;
}
else if(socksreq[3] == 4) {
/* IPv6 */
packetsize = 4 + 16 + 2;
}
/* At this point we already read first 10 bytes */
if(packetsize > 10) {
packetsize -= 10;
result = blockread_all(conn, sock, (char *)&socksreq[10], packetsize,
&actualread, timeout);
if((result != CURLE_OK) || (actualread != packetsize)) {
failf(data, "Failed to receive SOCKS5 connect request ack.");
return CURLE_COULDNT_CONNECT;
}
}
Curl_nonblock(sock, TRUE);
return CURLE_OK; /* Proxy was successful! */
}
/*
* This function logs in to a SOCKS4 proxy and sends the specifics to the final
* destination server.
*
* Reference :
* http://socks.permeo.com/protocol/socks4.protocol
*
* Note :
* Nonsupport "SOCKS 4A (Simple Extension to SOCKS 4 Protocol)"
* Nonsupport "Identification Protocol (RFC1413)"
*/
CURLcode Curl_SOCKS4(const char *proxy_name,
struct connectdata *conn)
{
unsigned char socksreq[262]; /* room for SOCKS4 request incl. user id */
int result;
CURLcode code;
curl_socket_t sock = conn->sock[FIRSTSOCKET];
long timeout;
struct SessionHandle *data = conn->data;
/* get timeout */
if(data->set.timeout && data->set.connecttimeout) {
if (data->set.timeout < data->set.connecttimeout)
timeout = data->set.timeout*1000;
else
timeout = data->set.connecttimeout*1000;
}
else if(data->set.timeout)
timeout = data->set.timeout*1000;
else if(data->set.connecttimeout)
timeout = data->set.connecttimeout*1000;
else
timeout = DEFAULT_CONNECT_TIMEOUT;
Curl_nonblock(sock, FALSE);
/*
* Compose socks4 request
*
* Request format
*
* +----+----+----+----+----+----+----+----+----+----+....+----+
* | VN | CD | DSTPORT | DSTIP | USERID |NULL|
* +----+----+----+----+----+----+----+----+----+----+....+----+
* # of bytes: 1 1 2 4 variable 1
*/
socksreq[0] = 4; /* version (SOCKS4) */
socksreq[1] = 1; /* connect */
*((unsigned short*)&socksreq[2]) = htons(conn->remote_port);
/* DNS resolve */
{
struct Curl_dns_entry *dns;
Curl_addrinfo *hp=NULL;
int rc;
rc = Curl_resolv(conn, conn->host.name, (int)conn->remote_port, &dns);
if(rc == CURLRESOLV_ERROR)
return CURLE_COULDNT_RESOLVE_PROXY;
if(rc == CURLRESOLV_PENDING)
/* this requires that we're in "wait for resolve" state */
rc = Curl_wait_for_resolv(conn, &dns);
/*
* We cannot use 'hostent' as a struct that Curl_resolv() returns. It
* returns a Curl_addrinfo pointer that may not always look the same.
*/
if(dns)
hp=dns->addr;
if (hp) {
char buf[64];
unsigned short ip[4];
Curl_printable_address(hp, buf, sizeof(buf));
if(4 == sscanf( buf, "%hu.%hu.%hu.%hu",
&ip[0], &ip[1], &ip[2], &ip[3])) {
/* Set DSTIP */
socksreq[4] = (unsigned char)ip[0];
socksreq[5] = (unsigned char)ip[1];
socksreq[6] = (unsigned char)ip[2];
socksreq[7] = (unsigned char)ip[3];
}
else
hp = NULL; /* fail! */
Curl_resolv_unlock(data, dns); /* not used anymore from now on */
}
if(!hp) {
failf(data, "Failed to resolve \"%s\" for SOCKS4 connect.",
conn->host.name);
return CURLE_COULDNT_RESOLVE_HOST;
}
}
/*
* This is currently not supporting "Identification Protocol (RFC1413)".
*/
socksreq[8] = 0; /* ensure empty userid is NUL-terminated */
if (proxy_name)
strlcat((char*)socksreq + 8, proxy_name, sizeof(socksreq) - 8);
/*
* Make connection
*/
{
ssize_t actualread;
ssize_t written;
int packetsize = 9 +
(int)strlen((char*)socksreq + 8); /* size including NUL */
/* Send request */
code = Curl_write(conn, sock, (char *)socksreq, packetsize, &written);
if ((code != CURLE_OK) || (written != packetsize)) {
failf(data, "Failed to send SOCKS4 connect request.");
return CURLE_COULDNT_CONNECT;
}
packetsize = 8; /* receive data size */
/* Receive response */
result = blockread_all(conn, sock, (char *)socksreq, packetsize,
&actualread, timeout);
if ((result != CURLE_OK) || (actualread != packetsize)) {
failf(data, "Failed to receive SOCKS4 connect request ack.");
return CURLE_COULDNT_CONNECT;
}
/*
* Response format
*
* +----+----+----+----+----+----+----+----+
* | VN | CD | DSTPORT | DSTIP |
* +----+----+----+----+----+----+----+----+
* # of bytes: 1 1 2 4
*
* VN is the version of the reply code and should be 0. CD is the result
* code with one of the following values:
*
* 90: request granted
* 91: request rejected or failed
* 92: request rejected because SOCKS server cannot connect to
* identd on the client
* 93: request rejected because the client program and identd
* report different user-ids
*/
/* wrong version ? */
if (socksreq[0] != 0) {
failf(data,
"SOCKS4 reply has wrong version, version should be 4.");
return CURLE_COULDNT_CONNECT;
}
/* Result */
switch(socksreq[1])
{
case 90:
infof(data, "SOCKS4 request granted.\n");
break;
case 91:
failf(data,
"Can't complete SOCKS4 connection to %d.%d.%d.%d:%d. (%d)"
", request rejected or failed.",
(unsigned char)socksreq[4], (unsigned char)socksreq[5],
(unsigned char)socksreq[6], (unsigned char)socksreq[7],
(unsigned int)ntohs(*(unsigned short*)(&socksreq[8])),
socksreq[1]);
return CURLE_COULDNT_CONNECT;
case 92:
failf(data,
"Can't complete SOCKS4 connection to %d.%d.%d.%d:%d. (%d)"
", request rejected because SOCKS server cannot connect to "
"identd on the client.",
(unsigned char)socksreq[4], (unsigned char)socksreq[5],
(unsigned char)socksreq[6], (unsigned char)socksreq[7],
(unsigned int)ntohs(*(unsigned short*)(&socksreq[8])),
socksreq[1]);
return CURLE_COULDNT_CONNECT;
case 93:
failf(data,
"Can't complete SOCKS4 connection to %d.%d.%d.%d:%d. (%d)"
", request rejected because the client program and identd "
"report different user-ids.",
(unsigned char)socksreq[4], (unsigned char)socksreq[5],
(unsigned char)socksreq[6], (unsigned char)socksreq[7],
(unsigned int)ntohs(*(unsigned short*)(&socksreq[8])),
socksreq[1]);
return CURLE_COULDNT_CONNECT;
default:
failf(data,
"Can't complete SOCKS4 connection to %d.%d.%d.%d:%d. (%d)"
", Unknown.",
(unsigned char)socksreq[4], (unsigned char)socksreq[5],
(unsigned char)socksreq[6], (unsigned char)socksreq[7],
(unsigned int)ntohs(*(unsigned short*)(&socksreq[8])),
socksreq[1]);
return CURLE_COULDNT_CONNECT;
}
}
Curl_nonblock(sock, TRUE);
return CURLE_OK; /* Proxy was successful! */
}
/*
* This function logs in to a SOCKS5 proxy and sends the specifics to the final
* destination server.
*/
CURLcode Curl_SOCKS5(const char *proxy_name,
const char *proxy_password,
struct connectdata *conn)
{
/*
According to the RFC1928, section "6. Replies". This is what a SOCK5
replies:
+----+-----+-------+------+----------+----------+
|VER | REP | RSV | ATYP | BND.ADDR | BND.PORT |
+----+-----+-------+------+----------+----------+
| 1 | 1 | X'00' | 1 | Variable | 2 |
+----+-----+-------+------+----------+----------+
Where:
o VER protocol version: X'05'
o REP Reply field:
o X'00' succeeded
*/
unsigned char socksreq[600]; /* room for large user/pw (255 max each) */
ssize_t actualread;
ssize_t written;
int result;
CURLcode code;
curl_socket_t sock = conn->sock[FIRSTSOCKET];
struct SessionHandle *data = conn->data;
long timeout;
/* get timeout */
if(data->set.timeout && data->set.connecttimeout) {
if (data->set.timeout < data->set.connecttimeout)
timeout = data->set.timeout*1000;
else
timeout = data->set.connecttimeout*1000;
}
else if(data->set.timeout)
timeout = data->set.timeout*1000;
else if(data->set.connecttimeout)
timeout = data->set.connecttimeout*1000;
else
timeout = DEFAULT_CONNECT_TIMEOUT;
Curl_nonblock(sock, TRUE);
/* wait until socket gets connected */
result = Curl_select(CURL_SOCKET_BAD, sock, (int)timeout);
if(-1 == result) {
failf(conn->data, "SOCKS5: no connection here");
return CURLE_COULDNT_CONNECT;
}
else if(0 == result) {
failf(conn->data, "SOCKS5: connection timeout");
return CURLE_OPERATION_TIMEDOUT;
}
if(result & CSELECT_ERR) {
failf(conn->data, "SOCKS5: error occured during connection");
return CURLE_COULDNT_CONNECT;
}
socksreq[0] = 5; /* version */
socksreq[1] = (char)(proxy_name ? 2 : 1); /* number of methods (below) */
socksreq[2] = 0; /* no authentication */
socksreq[3] = 2; /* username/password */
Curl_nonblock(sock, FALSE);
code = Curl_write(conn, sock, (char *)socksreq, (2 + (int)socksreq[1]),
&written);
if ((code != CURLE_OK) || (written != (2 + (int)socksreq[1]))) {
failf(data, "Unable to send initial SOCKS5 request.");
return CURLE_COULDNT_CONNECT;
}
Curl_nonblock(sock, TRUE);
result = Curl_select(sock, CURL_SOCKET_BAD, (int)timeout);
if(-1 == result) {
failf(conn->data, "SOCKS5 nothing to read");
return CURLE_COULDNT_CONNECT;
}
else if(0 == result) {
failf(conn->data, "SOCKS5 read timeout");
return CURLE_OPERATION_TIMEDOUT;
}
if(result & CSELECT_ERR) {
failf(conn->data, "SOCKS5 read error occured");
return CURLE_RECV_ERROR;
}
Curl_nonblock(sock, FALSE);
result=blockread_all(conn, sock, (char *)socksreq, 2, &actualread, timeout);
if ((result != CURLE_OK) || (actualread != 2)) {
failf(data, "Unable to receive initial SOCKS5 response.");
return CURLE_COULDNT_CONNECT;
}
if (socksreq[0] != 5) {
failf(data, "Received invalid version in initial SOCKS5 response.");
return CURLE_COULDNT_CONNECT;
}
if (socksreq[1] == 0) {
/* Nothing to do, no authentication needed */
;
}
else if (socksreq[1] == 2) {
/* Needs user name and password */
size_t userlen, pwlen;
int len;
if(proxy_name && proxy_password) {
userlen = strlen(proxy_name);
pwlen = proxy_password?strlen(proxy_password):0;
}
else {
userlen = 0;
pwlen = 0;
}
/* username/password request looks like
* +----+------+----------+------+----------+
* |VER | ULEN | UNAME | PLEN | PASSWD |
* +----+------+----------+------+----------+
* | 1 | 1 | 1 to 255 | 1 | 1 to 255 |
* +----+------+----------+------+----------+
*/
len = 0;
socksreq[len++] = 1; /* username/pw subnegotiation version */
socksreq[len++] = (char) userlen;
memcpy(socksreq + len, proxy_name, (int) userlen);
len += userlen;
socksreq[len++] = (char) pwlen;
memcpy(socksreq + len, proxy_password, (int) pwlen);
len += pwlen;
code = Curl_write(conn, sock, (char *)socksreq, len, &written);
if ((code != CURLE_OK) || (len != written)) {
failf(data, "Failed to send SOCKS5 sub-negotiation request.");
return CURLE_COULDNT_CONNECT;
}
result=blockread_all(conn, sock, (char *)socksreq, 2, &actualread,
timeout);
if ((result != CURLE_OK) || (actualread != 2)) {
failf(data, "Unable to receive SOCKS5 sub-negotiation response.");
return CURLE_COULDNT_CONNECT;
}
/* ignore the first (VER) byte */
if (socksreq[1] != 0) { /* status */
failf(data, "User was rejected by the SOCKS5 server (%d %d).",
socksreq[0], socksreq[1]);
return CURLE_COULDNT_CONNECT;
}
/* Everything is good so far, user was authenticated! */
}
else {
/* error */
if (socksreq[1] == 1) {
failf(data,
"SOCKS5 GSSAPI per-message authentication is not supported.");
return CURLE_COULDNT_CONNECT;
}
else if (socksreq[1] == 255) {
if (!proxy_name || !*proxy_name) {
failf(data,
"No authentication method was acceptable. (It is quite likely"
" that the SOCKS5 server wanted a username/password, since none"
" was supplied to the server on this connection.)");
}
else {
failf(data, "No authentication method was acceptable.");
}
return CURLE_COULDNT_CONNECT;
}
else {
failf(data,
"Undocumented SOCKS5 mode attempted to be used by server.");
return CURLE_COULDNT_CONNECT;
}
}
/* Authentication is complete, now specify destination to the proxy */
socksreq[0] = 5; /* version (SOCKS5) */
socksreq[1] = 1; /* connect */
socksreq[2] = 0; /* must be zero */
socksreq[3] = 1; /* IPv4 = 1 */
{
struct Curl_dns_entry *dns;
Curl_addrinfo *hp=NULL;
int rc = Curl_resolv(conn, conn->host.name, (int)conn->remote_port, &dns);
if(rc == CURLRESOLV_ERROR)
return CURLE_COULDNT_RESOLVE_HOST;
if(rc == CURLRESOLV_PENDING)
/* this requires that we're in "wait for resolve" state */
rc = Curl_wait_for_resolv(conn, &dns);
/*
* We cannot use 'hostent' as a struct that Curl_resolv() returns. It
* returns a Curl_addrinfo pointer that may not always look the same.
*/
if(dns)
hp=dns->addr;
if (hp) {
char buf[64];
unsigned short ip[4];
Curl_printable_address(hp, buf, sizeof(buf));
if(4 == sscanf( buf, "%hu.%hu.%hu.%hu",
&ip[0], &ip[1], &ip[2], &ip[3])) {
socksreq[4] = (unsigned char)ip[0];
socksreq[5] = (unsigned char)ip[1];
socksreq[6] = (unsigned char)ip[2];
socksreq[7] = (unsigned char)ip[3];
}
else
hp = NULL; /* fail! */
Curl_resolv_unlock(data, dns); /* not used anymore from now on */
}
if(!hp) {
failf(data, "Failed to resolve \"%s\" for SOCKS5 connect.",
conn->host.name);
return CURLE_COULDNT_RESOLVE_HOST;
}
}
*((unsigned short*)&socksreq[8]) = htons(conn->remote_port);
{
const int packetsize = 10;
code = Curl_write(conn, sock, (char *)socksreq, packetsize, &written);
if ((code != CURLE_OK) || (written != packetsize)) {
failf(data, "Failed to send SOCKS5 connect request.");
return CURLE_COULDNT_CONNECT;
}
result = blockread_all(conn, sock, (char *)socksreq, packetsize,
&actualread, timeout);
if ((result != CURLE_OK) || (actualread != packetsize)) {
failf(data, "Failed to receive SOCKS5 connect request ack.");
return CURLE_COULDNT_CONNECT;
}
if (socksreq[0] != 5) { /* version */
failf(data,
"SOCKS5 reply has wrong version, version should be 5.");
return CURLE_COULDNT_CONNECT;
}
if (socksreq[1] != 0) { /* Anything besides 0 is an error */
failf(data,
"Can't complete SOCKS5 connection to %d.%d.%d.%d:%d. (%d)",
(unsigned char)socksreq[4], (unsigned char)socksreq[5],
(unsigned char)socksreq[6], (unsigned char)socksreq[7],
(unsigned int)ntohs(*(unsigned short*)(&socksreq[8])),
socksreq[1]);
return CURLE_COULDNT_CONNECT;
}
}
Curl_nonblock(sock, TRUE);
return CURLE_OK; /* Proxy was successful! */
}
static CURLcode bindlocal(struct connectdata *conn,
curl_socket_t sockfd)
{
#ifdef HAVE_INET_NTOA
bool bindworked = FALSE;
struct SessionHandle *data = conn->data;
/*************************************************************
* Select device to bind socket to
*************************************************************/
if (strlen(data->set.device)<255) {
struct Curl_dns_entry *h=NULL;
size_t size;
char myhost[256] = "";
in_addr_t in;
int rc;
bool was_iface = FALSE;
/* 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 == CURLRESOLV_PENDING)
(void)Curl_wait_for_resolv(conn, &h);
if(h)
was_iface = TRUE;
}
if(!was_iface) {
/*
* 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 == CURLRESOLV_PENDING)
(void)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));
*/
failf(data, "Couldn't bind to '%s'", data->set.device);
return CURLE_HTTP_PORT_FAILED;
}
infof(data, "We bind local end to %s\n", myhost);
#ifdef SO_BINDTODEVICE
/* I am not sure any other OSs than Linux that provide this feature, and
* at the least I cannot test. --Ben
*
* This feature allows one to tightly bind the local socket to a
* particular interface. This will force even requests to other local
* interfaces to go out the external interface.
*
*/
if (was_iface) {
/* Only bind to the interface when specified as interface, not just as a
* hostname or ip address.
*/
if (setsockopt(sockfd, SOL_SOCKET, SO_BINDTODEVICE,
data->set.device, strlen(data->set.device)+1) != 0) {
/* printf("Failed to BINDTODEVICE, socket: %d device: %s error: %s\n",
sockfd, data->set.device, Curl_strerror(Curl_ourerrno())); */
infof(data, "SO_BINDTODEVICE %s failed\n",
data->set.device);
/* This is typically "errno 1, error: Operation not permitted" if
you're not running as root or another suitable privileged user */
}
}
#endif
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 */
if( bind(sockfd, addr->ai_addr, (socklen_t)addr->ai_addrlen) >= 0) {
/* we succeeded to bind */
#ifdef ENABLE_IPV6
struct sockaddr_in6 add;
#else
struct sockaddr_in add;
#endif
bindworked = TRUE;
size = sizeof(add);
if(getsockname(sockfd, (struct sockaddr *) &add,
(socklen_t *)&size)<0) {
failf(data, "getsockname() failed");
return CURLE_HTTP_PORT_FAILED;
}
}
if(!bindworked) {
data->state.os_errno = Curl_ourerrno();
failf(data, "bind failure: %s",
Curl_strerror(conn, data->state.os_errno));
return CURLE_HTTP_PORT_FAILED;
}
} /* 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 */
#else
(void)conn;
(void)sockfd;
#endif /* end of HAVE_INET_NTOA */
return CURLE_HTTP_PORT_FAILED;
}
int Curl_resolv_timeout(struct connectdata *conn,
const char *hostname,
int port,
struct Curl_dns_entry **entry,
long timeoutms)
{
#ifdef USE_ALARM_TIMEOUT
#ifdef HAVE_SIGACTION
struct sigaction keep_sigact; /* store the old struct here */
volatile bool keep_copysig = FALSE; /* wether old sigact has been saved */
struct sigaction sigact;
#else
#ifdef HAVE_SIGNAL
void (*keep_sigact)(int); /* store the old handler here */
#endif /* HAVE_SIGNAL */
#endif /* HAVE_SIGACTION */
volatile long timeout;
volatile unsigned int prev_alarm = 0;
struct SessionHandle *data = conn->data;
#endif /* USE_ALARM_TIMEOUT */
int rc;
*entry = NULL;
#ifdef USE_ALARM_TIMEOUT
if (data->set.no_signal)
/* Ignore the timeout when signals are disabled */
timeout = 0;
else
timeout = timeoutms;
if(!timeout)
/* USE_ALARM_TIMEOUT defined, but no timeout actually requested */
return Curl_resolv(conn, hostname, port, entry);
if(timeout < 1000)
/* The alarm() function only provides integer second resolution, so if
we want to wait less than one second we must bail out already now. */
return CURLRESOLV_TIMEDOUT;
/*************************************************************
* Set signal handler to catch SIGALRM
* Store the old value to be able to set it back later!
*************************************************************/
#ifdef HAVE_SIGACTION
sigaction(SIGALRM, NULL, &sigact);
keep_sigact = sigact;
keep_copysig = TRUE; /* yes, we have a copy */
sigact.sa_handler = alarmfunc;
#ifdef SA_RESTART
/* HPUX doesn't have SA_RESTART but defaults to that behaviour! */
sigact.sa_flags &= ~SA_RESTART;
#endif
/* now set the new struct */
sigaction(SIGALRM, &sigact, NULL);
#else /* HAVE_SIGACTION */
/* no sigaction(), revert to the much lamer signal() */
#ifdef HAVE_SIGNAL
keep_sigact = signal(SIGALRM, alarmfunc);
#endif
#endif /* HAVE_SIGACTION */
/* alarm() makes a signal get sent when the timeout fires off, and that
will abort system calls */
prev_alarm = alarm(curlx_sltoui(timeout/1000L));
/* This allows us to time-out from the name resolver, as the timeout
will generate a signal and we will siglongjmp() from that here.
This technique has problems (see alarmfunc).
This should be the last thing we do before calling Curl_resolv(),
as otherwise we'd have to worry about variables that get modified
before we invoke Curl_resolv() (and thus use "volatile"). */
if(sigsetjmp(curl_jmpenv, 1)) {
/* this is coming from a siglongjmp() after an alarm signal */
failf(data, "name lookup timed out");
rc = CURLRESOLV_ERROR;
goto clean_up;
}
#else
#ifndef CURLRES_ASYNCH
if(timeoutms)
infof(conn->data, "timeout on name lookup is not supported\n");
#else
(void)timeoutms; /* timeoutms not used with an async resolver */
#endif
#endif /* USE_ALARM_TIMEOUT */
/* Perform the actual name resolution. This might be interrupted by an
* alarm if it takes too long.
*/
rc = Curl_resolv(conn, hostname, port, entry);
#ifdef USE_ALARM_TIMEOUT
clean_up:
if(!prev_alarm)
/* deactivate a possibly active alarm before uninstalling the handler */
alarm(0);
#ifdef HAVE_SIGACTION
if(keep_copysig) {
/* we got a struct as it looked before, now put that one back nice
and clean */
sigaction(SIGALRM, &keep_sigact, NULL); /* put it back */
}
#else
#ifdef HAVE_SIGNAL
/* restore the previous SIGALRM handler */
signal(SIGALRM, keep_sigact);
#endif
#endif /* HAVE_SIGACTION */
/* switch back the alarm() to either zero or to what it was before minus
the time we spent until now! */
if(prev_alarm) {
/* there was an alarm() set before us, now put it back */
unsigned long elapsed_ms = Curl_tvdiff(Curl_tvnow(), conn->created);
/* the alarm period is counted in even number of seconds */
unsigned long alarm_set = prev_alarm - elapsed_ms/1000;
if(!alarm_set ||
((alarm_set >= 0x80000000) && (prev_alarm < 0x80000000)) ) {
/* if the alarm time-left reached zero or turned "negative" (counted
with unsigned values), we should fire off a SIGALRM here, but we
won't, and zero would be to switch it off so we never set it to
less than 1! */
alarm(1);
rc = CURLRESOLV_TIMEDOUT;
failf(data, "Previous alarm fired off!");
}
else
alarm((unsigned int)alarm_set);
}
#endif /* USE_ALARM_TIMEOUT */
return rc;
}
static CURLcode bindlocal(struct connectdata *conn,
curl_socket_t sockfd, int af)
{
struct SessionHandle *data = conn->data;
struct sockaddr_in me;
#ifdef ENABLE_IPV6
struct sockaddr_in6 me6;
#endif
struct sockaddr *sock = NULL; /* bind to this address */
socklen_t socksize = 0; /* size of the data sock points to */
struct Curl_dns_entry *h=NULL;
unsigned short port = data->set.localport; /* use this port number, 0 for
"random" */
/* how many port numbers to try to bind to, increasing one at a time */
int portnum = data->set.localportrange;
const char *dev = data->set.str[STRING_DEVICE];
int error;
/*************************************************************
* Select device to bind socket to
*************************************************************/
if(dev && (strlen(dev)<255) ) {
char myhost[256] = "";
int rc;
bool was_iface = FALSE;
if(Curl_if2ip(af, dev, myhost, sizeof(myhost))) {
/*
* We now have the numerical IP address in the 'myhost' buffer
*/
rc = Curl_resolv(conn, myhost, 0, &h);
if(rc == CURLRESOLV_PENDING)
(void)Curl_wait_for_resolv(conn, &h);
if(h) {
was_iface = TRUE;
}
}
if(!was_iface) {
/*
* This was not an interface, resolve the name as a host name
* or IP number
*/
/*
* Temporarily force name resolution to use only the address type
* of the connection. The resolve functions should really be changed
* to take a type parameter instead.
*/
long ipver = data->set.ip_version;
if (af == AF_INET)
data->set.ip_version = CURL_IPRESOLVE_V4;
#ifdef ENABLE_IPV6
else if (af == AF_INET6)
data->set.ip_version = CURL_IPRESOLVE_V6;
#endif
rc = Curl_resolv(conn, dev, 0, &h);
if(rc == CURLRESOLV_PENDING)
(void)Curl_wait_for_resolv(conn, &h);
data->set.ip_version = ipver;
if(h) {
/* convert the resolved address, sizeof myhost >= INET_ADDRSTRLEN */
Curl_printable_address(h->addr, myhost, sizeof myhost);
}
}
if(!*myhost || !h) {
/* need to fix this
h=Curl_gethost(data,
getmyhost(*myhost,sizeof(myhost)),
hostent_buf,
sizeof(hostent_buf));
*/
failf(data, "Couldn't bind to '%s'", dev);
if(h)
Curl_resolv_unlock(data, h);
return CURLE_INTERFACE_FAILED;
}
infof(data, "Bind local address to %s\n", myhost);
sock = h->addr->ai_addr;
socksize = h->addr->ai_addrlen;
#ifdef SO_BINDTODEVICE
/* I am not sure any other OSs than Linux that provide this feature, and
* at the least I cannot test. --Ben
*
* This feature allows one to tightly bind the local socket to a
* particular interface. This will force even requests to other local
* interfaces to go out the external interface.
*
*/
if(was_iface) {
/* Only bind to the interface when specified as interface, not just as a
* hostname or ip address.
*/
if(setsockopt(sockfd, SOL_SOCKET, SO_BINDTODEVICE,
dev, strlen(dev)+1) != 0) {
error = SOCKERRNO;
infof(data, "SO_BINDTODEVICE %s failed with errno %d: %s; will do regular bind\n",
dev, error, Curl_strerror(conn, error));
/* This is typically "errno 1, error: Operation not permitted" if
you're not running as root or another suitable privileged user */
}
}
#endif
}
else if(port) {
/* if a local port number is requested but no local IP, extract the
address from the socket */
if(af == AF_INET) {
memset(&me, 0, sizeof(me));
me.sin_family = AF_INET;
me.sin_addr.s_addr = INADDR_ANY;
sock = (struct sockaddr *)&me;
socksize = sizeof(me);
}
#ifdef ENABLE_IPV6
else { /* AF_INET6 */
memset(&me6, 0, sizeof(me6));
me6.sin6_family = AF_INET6;
/* in6addr_any isn't always available and since me6 has just been
cleared, it's not strictly necessary to use it here */
/*me6.sin6_addr = in6addr_any;*/
sock = (struct sockaddr *)&me6;
socksize = sizeof(me6);
}
#endif
}
else
/* no local kind of binding was requested */
return CURLE_OK;
do {
/* Set port number to bind to, 0 makes the system pick one */
if(sock->sa_family == AF_INET)
me.sin_port = htons(port);
#ifdef ENABLE_IPV6
else
me6.sin6_port = htons(port);
#endif
if( bind(sockfd, sock, socksize) >= 0) {
/* we succeeded to bind */
struct Curl_sockaddr_storage add;
socklen_t size = sizeof(add);
memset(&add, 0, sizeof(struct Curl_sockaddr_storage));
if(getsockname(sockfd, (struct sockaddr *) &add, &size) < 0) {
data->state.os_errno = error = SOCKERRNO;
failf(data, "getsockname() failed with errno %d: %s",
error, Curl_strerror(conn, error));
if(h)
Curl_resolv_unlock(data, h);
return CURLE_INTERFACE_FAILED;
}
/* We re-use/clobber the port variable here below */
if(((struct sockaddr *)&add)->sa_family == AF_INET)
port = ntohs(((struct sockaddr_in *)&add)->sin_port);
#ifdef ENABLE_IPV6
else
port = ntohs(((struct sockaddr_in6 *)&add)->sin6_port);
#endif
infof(data, "Local port: %d\n", port);
conn->bits.bound = TRUE;
if(h)
Curl_resolv_unlock(data, h);
return CURLE_OK;
}
if(--portnum > 0) {
infof(data, "Bind to local port %d failed, trying next\n", port);
port++; /* try next port */
}
else
break;
} while(1);
data->state.os_errno = error = SOCKERRNO;
failf(data, "bind failed with errno %d: %s",
error, Curl_strerror(conn, error));
if(h)
Curl_resolv_unlock(data, h);
return CURLE_INTERFACE_FAILED;
}
static CURLcode bindlocal(struct connectdata *conn,
curl_socket_t sockfd, int af)
{
struct SessionHandle *data = conn->data;
struct Curl_sockaddr_storage sa;
struct sockaddr *sock = (struct sockaddr *)&sa; /* bind to this address */
curl_socklen_t sizeof_sa = 0; /* size of the data sock points to */
struct sockaddr_in *si4 = (struct sockaddr_in *)&sa;
#ifdef ENABLE_IPV6
struct sockaddr_in6 *si6 = (struct sockaddr_in6 *)&sa;
#endif
struct Curl_dns_entry *h=NULL;
unsigned short port = data->set.localport; /* use this port number, 0 for
"random" */
/* how many port numbers to try to bind to, increasing one at a time */
int portnum = data->set.localportrange;
const char *dev = data->set.str[STRING_DEVICE];
int error;
char myhost[256] = "";
int done = 0; /* -1 for error, 1 for address found */
bool is_interface = FALSE;
bool is_host = FALSE;
static const char *if_prefix = "if!";
static const char *host_prefix = "host!";
/*************************************************************
* Select device to bind socket to
*************************************************************/
if(!dev && !port)
/* no local kind of binding was requested */
return CURLE_OK;
memset(&sa, 0, sizeof(struct Curl_sockaddr_storage));
if(dev && (strlen(dev)<255) ) {
if(strncmp(if_prefix, dev, strlen(if_prefix)) == 0) {
dev += strlen(if_prefix);
is_interface = TRUE;
}
else if(strncmp(host_prefix, dev, strlen(host_prefix)) == 0) {
dev += strlen(host_prefix);
is_host = TRUE;
}
/* interface */
if(!is_host) {
return CURLE_UNSUPPORTED_PROTOCOL;
}
if(!is_interface) {
/*
* This was not an interface, resolve the name as a host name
* or IP number
*
* Temporarily force name resolution to use only the address type
* of the connection. The resolve functions should really be changed
* to take a type parameter instead.
*/
long ipver = conn->ip_version;
int rc;
if(af == AF_INET)
conn->ip_version = CURL_IPRESOLVE_V4;
#ifdef ENABLE_IPV6
else if(af == AF_INET6)
conn->ip_version = CURL_IPRESOLVE_V6;
#endif
rc = Curl_resolv(conn, dev, 0, &h);
if(rc == CURLRESOLV_PENDING)
(void)Curl_resolver_wait_resolv(conn, &h);
conn->ip_version = ipver;
if(h) {
/* convert the resolved address, sizeof myhost >= INET_ADDRSTRLEN */
Curl_printable_address(h->addr, myhost, sizeof(myhost));
infof(data, "Name '%s' family %i resolved to '%s' family %i\n",
dev, af, myhost, h->addr->ai_family);
Curl_resolv_unlock(data, h);
done = 1;
}
else {
/*
* provided dev was no interface (or interfaces are not supported
* e.g. solaris) no ip address and no domain we fail here
*/
done = -1;
}
}
if(done > 0) {
#ifdef ENABLE_IPV6
/* ipv6 address */
if(af == AF_INET6) {
#ifdef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID
char *scope_ptr = strchr(myhost, '%');
if(scope_ptr)
*(scope_ptr++) = 0;
#endif
if(Curl_inet_pton(AF_INET6, myhost, &si6->sin6_addr) > 0) {
si6->sin6_family = AF_INET6;
si6->sin6_port = htons(port);
#ifdef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID
if(scope_ptr)
/* The "myhost" string either comes from Curl_if2ip or from
Curl_printable_address. The latter returns only numeric scope
IDs and the former returns none at all. So the scope ID, if
present, is known to be numeric */
si6->sin6_scope_id = atoi(scope_ptr);
#endif
}
sizeof_sa = sizeof(struct sockaddr_in6);
}
else
#endif
/* ipv4 address */
if((af == AF_INET) &&
(Curl_inet_pton(AF_INET, myhost, &si4->sin_addr) > 0)) {
si4->sin_family = AF_INET;
si4->sin_port = htons(port);
sizeof_sa = sizeof(struct sockaddr_in);
}
}
if(done < 1) {
failf(data, "Couldn't bind to '%s'", dev);
return CURLE_INTERFACE_FAILED;
}
}
else {
/* no device was given, prepare sa to match af's needs */
#ifdef ENABLE_IPV6
if(af == AF_INET6) {
si6->sin6_family = AF_INET6;
si6->sin6_port = htons(port);
sizeof_sa = sizeof(struct sockaddr_in6);
}
else
#endif
if(af == AF_INET) {
si4->sin_family = AF_INET;
si4->sin_port = htons(port);
sizeof_sa = sizeof(struct sockaddr_in);
}
}
for(;;) {
if(bind(sockfd, sock, sizeof_sa) >= 0) {
/* we succeeded to bind */
struct Curl_sockaddr_storage add;
curl_socklen_t size = sizeof(add);
memset(&add, 0, sizeof(struct Curl_sockaddr_storage));
if(getsockname(sockfd, (struct sockaddr *) &add, &size) < 0) {
data->state.os_errno = error = SOCKERRNO;
failf(data, "getsockname() failed with errno %d: %s",
error, Curl_strerror(conn, error));
return CURLE_INTERFACE_FAILED;
}
infof(data, "Local port: %hu\n", port);
conn->bits.bound = TRUE;
return CURLE_OK;
}
if(--portnum > 0) {
infof(data, "Bind to local port %hu failed, trying next\n", port);
port++; /* try next port */
/* We re-use/clobber the port variable here below */
if(sock->sa_family == AF_INET)
si4->sin_port = ntohs(port);
#ifdef ENABLE_IPV6
else
si6->sin6_port = ntohs(port);
#endif
}
else
break;
}
data->state.os_errno = error = SOCKERRNO;
failf(data, "bind failed with errno %d: %s",
error, Curl_strerror(conn, error));
return CURLE_INTERFACE_FAILED;
}
static CURLcode bindlocal(struct connectdata *conn,
curl_socket_t sockfd)
{
#ifdef HAVE_INET_NTOA
bool bindworked = FALSE;
struct SessionHandle *data = conn->data;
/*************************************************************
* Select device to bind socket to
*************************************************************/
if (strlen(data->set.device)<255) {
struct Curl_dns_entry *h=NULL;
size_t size;
char myhost[256] = "";
in_addr_t in;
int rc;
bool was_iface = FALSE;
/* 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)
(void)Curl_wait_for_resolv(conn, &h);
if(h)
was_iface = TRUE;
}
if(!was_iface) {
/*
* 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)
(void)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));
*/
failf(data, "Couldn't bind to '%s'", data->set.device);
return CURLE_HTTP_PORT_FAILED;
}
infof(data, "We bind local end to %s\n", myhost);
#ifdef SO_BINDTODEVICE
/* I am not sure any other OSs than Linux that provide this feature, and
* at the least I cannot test. --Ben
*
* This feature allows one to tightly bind the local socket to a
* particular interface. This will force even requests to other local
* interfaces to go out the external interface.
*
*/
if (was_iface) {
/* Only bind to the interface when specified as interface, not just as a
* hostname or ip address.
*/
if (setsockopt(sockfd, SOL_SOCKET, SO_BINDTODEVICE,
data->set.device, strlen(data->set.device)+1) != 0) {
/* printf("Failed to BINDTODEVICE, socket: %d device: %s error: %s\n",
sockfd, data->set.device, strerror(errno)); */
infof(data, "SO_BINDTODEVICE %s failed\n",
data->set.device);
/* This is typiclally "errno 1, error: Operation not permitted" if
you're not running as root or another suitable privileged user */
}
}
#endif
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
if( bind(sockfd, addr->ai_addr, addr->ai_addrlen) >= 0) {
/* we succeeded to bind */
struct sockaddr_in6 add;
bindworked = TRUE;
size = sizeof(add);
if(getsockname(sockfd, (struct sockaddr *) &add,
(socklen_t *)&size)<0) {
failf(data, "getsockname() failed");
return CURLE_HTTP_PORT_FAILED;
}
}
#else
{
struct sockaddr_in sa;
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;
bindworked = TRUE;
size = sizeof(add);
if(getsockname(sockfd, (struct sockaddr *) &add,
(socklen_t *)&size)<0) {
failf(data, "getsockname() failed");
return CURLE_HTTP_PORT_FAILED;
}
}
}
#endif
if(!bindworked) {
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 CURLcode bindlocal(struct connectdata *conn,
int sockfd)
{
#if !defined(WIN32)||defined(__CYGWIN32__)
/* We don't generally like checking for OS-versions, we should make this
HAVE_XXXX based, although at the moment I don't have a decent test for
this! */
#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;
/* 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
*/
h = Curl_resolv(data, myhost, 0);
}
else {
if(strlen(data->set.device)>1) {
/*
* This was not an interface, resolve the name as a host name
* or IP number
*/
h = Curl_resolv(data, data->set.device, 0);
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 */
#endif /* end of not WIN32 */
return CURLE_HTTP_PORT_FAILED;
}
static CURLcode bindlocal(struct connectdata *conn,
curl_socket_t sockfd, int af, unsigned int scope)
{
struct Curl_easy *data = conn->data;
struct Curl_sockaddr_storage sa;
struct sockaddr *sock = (struct sockaddr *)&sa; /* bind to this address */
curl_socklen_t sizeof_sa = 0; /* size of the data sock points to */
struct sockaddr_in *si4 = (struct sockaddr_in *)&sa;
#ifdef ENABLE_IPV6
struct sockaddr_in6 *si6 = (struct sockaddr_in6 *)&sa;
#endif
struct Curl_dns_entry *h = NULL;
unsigned short port = data->set.localport; /* use this port number, 0 for
"random" */
/* how many port numbers to try to bind to, increasing one at a time */
int portnum = data->set.localportrange;
const char *dev = data->set.str[STRING_DEVICE];
int error;
/*************************************************************
* Select device to bind socket to
*************************************************************/
if(!dev && !port)
/* no local kind of binding was requested */
return CURLE_OK;
memset(&sa, 0, sizeof(struct Curl_sockaddr_storage));
if(dev && (strlen(dev)<255) ) {
char myhost[256] = "";
int done = 0; /* -1 for error, 1 for address found */
bool is_interface = FALSE;
bool is_host = FALSE;
static const char *if_prefix = "if!";
static const char *host_prefix = "host!";
if(strncmp(if_prefix, dev, strlen(if_prefix)) == 0) {
dev += strlen(if_prefix);
is_interface = TRUE;
}
else if(strncmp(host_prefix, dev, strlen(host_prefix)) == 0) {
dev += strlen(host_prefix);
is_host = TRUE;
}
/* interface */
if(!is_host) {
#ifdef SO_BINDTODEVICE
/* I am not sure any other OSs than Linux that provide this feature,
* and at the least I cannot test. --Ben
*
* This feature allows one to tightly bind the local socket to a
* particular interface. This will force even requests to other
* local interfaces to go out the external interface.
*
*
* Only bind to the interface when specified as interface, not just
* as a hostname or ip address.
*
* interface might be a VRF, eg: vrf-blue, which means it cannot be
* converted to an IP address and would fail Curl_if2ip. Simply try
* to use it straight away.
*/
if(setsockopt(sockfd, SOL_SOCKET, SO_BINDTODEVICE,
dev, (curl_socklen_t)strlen(dev) + 1) == 0) {
/* This is typically "errno 1, error: Operation not permitted" if
* you're not running as root or another suitable privileged
* user.
* If it succeeds it means the parameter was a valid interface and
* not an IP address. Return immediately.
*/
return CURLE_OK;
}
#endif
switch(Curl_if2ip(af, scope, conn->scope_id, dev,
myhost, sizeof(myhost))) {
case IF2IP_NOT_FOUND:
if(is_interface) {
/* Do not fall back to treating it as a host name */
failf(data, "Couldn't bind to interface '%s'", dev);
return CURLE_INTERFACE_FAILED;
}
break;
case IF2IP_AF_NOT_SUPPORTED:
/* Signal the caller to try another address family if available */
return CURLE_UNSUPPORTED_PROTOCOL;
case IF2IP_FOUND:
is_interface = TRUE;
/*
* We now have the numerical IP address in the 'myhost' buffer
*/
infof(data, "Local Interface %s is ip %s using address family %i\n",
dev, myhost, af);
done = 1;
break;
}
}
if(!is_interface) {
/*
* This was not an interface, resolve the name as a host name
* or IP number
*
* Temporarily force name resolution to use only the address type
* of the connection. The resolve functions should really be changed
* to take a type parameter instead.
*/
long ipver = conn->ip_version;
int rc;
if(af == AF_INET)
conn->ip_version = CURL_IPRESOLVE_V4;
#ifdef ENABLE_IPV6
else if(af == AF_INET6)
conn->ip_version = CURL_IPRESOLVE_V6;
#endif
rc = Curl_resolv(conn, dev, 0, &h);
if(rc == CURLRESOLV_PENDING)
(void)Curl_resolver_wait_resolv(conn, &h);
conn->ip_version = ipver;
if(h) {
/* convert the resolved address, sizeof myhost >= INET_ADDRSTRLEN */
Curl_printable_address(h->addr, myhost, sizeof(myhost));
infof(data, "Name '%s' family %i resolved to '%s' family %i\n",
dev, af, myhost, h->addr->ai_family);
Curl_resolv_unlock(data, h);
done = 1;
}
else {
/*
* provided dev was no interface (or interfaces are not supported
* e.g. solaris) no ip address and no domain we fail here
*/
done = -1;
}
}
if(done > 0) {
#ifdef ENABLE_IPV6
/* IPv6 address */
if(af == AF_INET6) {
#ifdef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID
char *scope_ptr = strchr(myhost, '%');
if(scope_ptr)
*(scope_ptr++) = 0;
#endif
if(Curl_inet_pton(AF_INET6, myhost, &si6->sin6_addr) > 0) {
si6->sin6_family = AF_INET6;
si6->sin6_port = htons(port);
#ifdef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID
if(scope_ptr)
/* The "myhost" string either comes from Curl_if2ip or from
Curl_printable_address. The latter returns only numeric scope
IDs and the former returns none at all. So the scope ID, if
present, is known to be numeric */
si6->sin6_scope_id = atoi(scope_ptr);
#endif
}
sizeof_sa = sizeof(struct sockaddr_in6);
}
else
#endif
/* IPv4 address */
if((af == AF_INET) &&
(Curl_inet_pton(AF_INET, myhost, &si4->sin_addr) > 0)) {
si4->sin_family = AF_INET;
si4->sin_port = htons(port);
sizeof_sa = sizeof(struct sockaddr_in);
}
}
if(done < 1) {
/* errorbuf is set false so failf will overwrite any message already in
the error buffer, so the user receives this error message instead of a
generic resolve error. */
data->state.errorbuf = FALSE;
failf(data, "Couldn't bind to '%s'", dev);
return CURLE_INTERFACE_FAILED;
}
}
else {
/* no device was given, prepare sa to match af's needs */
#ifdef ENABLE_IPV6
if(af == AF_INET6) {
si6->sin6_family = AF_INET6;
si6->sin6_port = htons(port);
sizeof_sa = sizeof(struct sockaddr_in6);
}
else
#endif
if(af == AF_INET) {
si4->sin_family = AF_INET;
si4->sin_port = htons(port);
sizeof_sa = sizeof(struct sockaddr_in);
}
}
for(;;) {
if(bind(sockfd, sock, sizeof_sa) >= 0) {
/* we succeeded to bind */
struct Curl_sockaddr_storage add;
curl_socklen_t size = sizeof(add);
memset(&add, 0, sizeof(struct Curl_sockaddr_storage));
if(getsockname(sockfd, (struct sockaddr *) &add, &size) < 0) {
data->state.os_errno = error = SOCKERRNO;
failf(data, "getsockname() failed with errno %d: %s",
error, Curl_strerror(conn, error));
return CURLE_INTERFACE_FAILED;
}
infof(data, "Local port: %hu\n", port);
conn->bits.bound = TRUE;
return CURLE_OK;
}
if(--portnum > 0) {
infof(data, "Bind to local port %hu failed, trying next\n", port);
port++; /* try next port */
/* We re-use/clobber the port variable here below */
if(sock->sa_family == AF_INET)
si4->sin_port = ntohs(port);
#ifdef ENABLE_IPV6
else
si6->sin6_port = ntohs(port);
#endif
}
else
break;
}
data->state.os_errno = error = SOCKERRNO;
failf(data, "bind failed with errno %d: %s",
error, Curl_strerror(conn, error));
return CURLE_INTERFACE_FAILED;
}
