void Curl_infof(struct SessionHandle *data, const char *fmt, ...)
{
if(data && data->set.verbose) {
va_list ap;
size_t len;
char print_buffer[2048 + 1];
va_start(ap, fmt);
vsnprintf(print_buffer, sizeof(print_buffer), fmt, ap);
va_end(ap);
len = strlen(print_buffer);
Curl_debug(data, CURLINFO_TEXT, print_buffer, len, NULL);
}
}
int Curl_sec_read_msg(struct connectdata *conn, char *buffer,
enum protection_level level)
{
/* decoded_len should be size_t or ssize_t but conn->mech->decode returns an
int */
int decoded_len;
char *buf;
int ret_code;
size_t decoded_sz = 0;
CURLcode error;
DEBUGASSERT(level > PROT_NONE && level < PROT_LAST);
error = Curl_base64_decode(buffer + 4, (unsigned char **)&buf, &decoded_sz);
if(error || decoded_sz == 0)
return -1;
if(decoded_sz > (size_t)INT_MAX) {
free(buf);
return -1;
}
decoded_len = curlx_uztosi(decoded_sz);
decoded_len = conn->mech->decode(conn->app_data, buf, decoded_len,
level, conn);
if(decoded_len <= 0) {
free(buf);
return -1;
}
if(conn->data->set.verbose) {
buf[decoded_len] = '\n';
Curl_debug(conn->data, CURLINFO_HEADER_IN, buf, decoded_len + 1, conn);
}
buf[decoded_len] = '\0';
DEBUGASSERT(decoded_len > 3);
if(buf[3] == '-')
ret_code = 0;
else {
/* Check for error? */
(void)sscanf(buf, "%d", &ret_code);
}
if(buf[decoded_len - 1] == '\n')
buf[decoded_len - 1] = '\0';
/* FIXME: Is |buffer| length always greater than |decoded_len|? */
strcpy(buffer, buf);
free(buf);
return ret_code;
}
/*
* Our callback from the SSL/TLS layers.
*/
static void ssl_tls_trace(int direction, int ssl_ver, int content_type,
const void *buf, size_t len, const SSL *ssl,
struct connectdata *conn)
{
struct SessionHandle *data = conn->data;
const char *msg_name, *tls_rt_name;
char ssl_buf[1024];
int ver, msg_type, txt_len;
if (!conn || !conn->data || !conn->data->set.fdebug ||
(direction != 0 && direction != 1))
return;
data = conn->data;
ssl_ver >>= 8;
ver = (ssl_ver == SSL2_VERSION_MAJOR ? '2' :
ssl_ver == SSL3_VERSION_MAJOR ? '3' : '?');
/* SSLv2 doesn't seem to have TLS record-type headers, so OpenSSL
* always pass-up content-type as 0. But the interesting message-type
* is at 'buf[0]'.
*/
if (ssl_ver == SSL3_VERSION_MAJOR && content_type != 0)
tls_rt_name = tls_rt_type(content_type);
else
tls_rt_name = "";
msg_type = *(char*)buf;
msg_name = ssl_msg_type(ssl_ver, msg_type);
txt_len = 1 + snprintf(ssl_buf, sizeof(ssl_buf), "SSLv%c, %s%s (%d):\n",
ver, tls_rt_name, msg_name, msg_type);
Curl_debug(data, CURLINFO_TEXT, ssl_buf, txt_len, NULL);
Curl_debug(data, (direction == 1) ? CURLINFO_SSL_DATA_OUT :
CURLINFO_SSL_DATA_IN, (char *)buf, len, NULL);
(void) ssl;
}
/* Curl_sendf() sends formated data to the server */
CURLcode Curl_sendf(curl_socket_t sockfd, struct connectdata *conn,
const char *fmt, ...)
{
struct SessionHandle *data = conn->data;
ssize_t bytes_written;
size_t write_len;
CURLcode res;
char *s;
char *sptr;
va_list ap;
va_start(ap, fmt);
s = vaprintf(fmt, ap); /* returns an allocated string */
va_end(ap);
if(!s)
return CURLE_OUT_OF_MEMORY; /* failure */
bytes_written=0;
write_len = strlen(s);
sptr = s;
while (1)
{
/* Write the buffer to the socket */
res = Curl_write(conn, sockfd, sptr, write_len, &bytes_written);
if(CURLE_OK != res)
break;
if(data->set.verbose)
Curl_debug(data, CURLINFO_DATA_OUT, sptr, bytes_written);
if((size_t)bytes_written != write_len)
{
/* if not all was written at once, we must advance the pointer, decrease
the size left and try again! */
write_len -= bytes_written;
sptr += bytes_written;
}
else
break;
}
free(s); /* free the output string */
return res;
}
void Curl_failf(struct Curl_easy *data, const char *fmt, ...)
{
if(data->set.verbose || data->set.errorbuffer) {
va_list ap;
size_t len;
char error[CURL_ERROR_SIZE + 2];
va_start(ap, fmt);
vsnprintf(error, CURL_ERROR_SIZE, fmt, ap);
len = strlen(error);
if(data->set.errorbuffer && !data->state.errorbuf) {
strcpy(data->set.errorbuffer, error);
data->state.errorbuf = TRUE; /* wrote error string */
}
if(data->set.verbose) {
error[len] = '\n';
error[++len] = '\0';
Curl_debug(data, CURLINFO_TEXT, error, len, NULL);
}
va_end(ap);
}
}
void Curl_failf(struct SessionHandle *data, const char *fmt, ...)
{
va_list ap;
size_t len;
va_start(ap, fmt);
vsnprintf(data->state.buffer, BUFSIZE, fmt, ap);
if(data->set.errorbuffer && !data->state.errorbuf) {
snprintf(data->set.errorbuffer, CURL_ERROR_SIZE, "%s", data->state.buffer);
data->state.errorbuf = TRUE; /* wrote error string */
}
if(data->set.verbose) {
len = strlen(data->state.buffer);
if(len < BUFSIZE - 1) {
data->state.buffer[len] = '\n';
data->state.buffer[++len] = '\0';
}
Curl_debug(data, CURLINFO_TEXT, data->state.buffer, len, NULL);
}
va_end(ap);
}
void Curl_failf(struct SessionHandle *data, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
if(data->set.errorbuffer && !data->state.errorbuf) {
vsnprintf(data->set.errorbuffer, CURL_ERROR_SIZE, fmt, ap);
data->state.errorbuf = TRUE; /* wrote error string */
if(data->set.verbose) {
size_t len = strlen(data->set.errorbuffer);
bool doneit=FALSE;
if(len < CURL_ERROR_SIZE - 1) {
doneit = TRUE;
data->set.errorbuffer[len] = '\n';
data->set.errorbuffer[++len] = '\0';
}
Curl_debug(data, CURLINFO_TEXT, data->set.errorbuffer, len, NULL);
if(doneit)
/* cut off the newline again */
data->set.errorbuffer[--len]=0;
}
}
va_end(ap);
}
void Curl_infof(struct Curl_easy *data, const char *fmt, ...)
{
if(data && data->set.verbose) {
va_list ap;
size_t len;
char print_buffer[2048 + 1];
va_start(ap, fmt);
len = mvsnprintf(print_buffer, sizeof(print_buffer), fmt, ap);
/*
* Indicate truncation of the input by replacing the last 3 characters
* with "...", and transfer the newline over in case the format had one.
*/
if(len >= sizeof(print_buffer)) {
len = strlen(fmt);
if(fmt[--len] == '\n')
msnprintf(print_buffer + (sizeof(print_buffer) - 5), 5, "...\n");
else
msnprintf(print_buffer + (sizeof(print_buffer) - 4), 4, "...");
}
va_end(ap);
len = strlen(print_buffer);
Curl_debug(data, CURLINFO_TEXT, print_buffer, len);
}
}
CURLcode Curl_proxyCONNECT(struct connectdata *conn,
int sockindex,
const char *hostname,
unsigned short remote_port)
{
int subversion=0;
struct SessionHandle *data=conn->data;
struct SingleRequest *k = &data->req;
CURLcode result;
long timeout =
data->set.timeout?data->set.timeout:PROXY_TIMEOUT; /* in milliseconds */
curl_socket_t tunnelsocket = conn->sock[sockindex];
curl_off_t cl=0;
bool closeConnection = FALSE;
bool chunked_encoding = FALSE;
long check;
#define SELECT_OK 0
#define SELECT_ERROR 1
#define SELECT_TIMEOUT 2
int error = SELECT_OK;
if(conn->tunnel_state[sockindex] == TUNNEL_COMPLETE)
return CURLE_OK; /* CONNECT is already completed */
conn->bits.proxy_connect_closed = FALSE;
do {
if(TUNNEL_INIT == conn->tunnel_state[sockindex]) {
/* BEGIN CONNECT PHASE */
char *host_port;
Curl_send_buffer *req_buffer;
infof(data, "Establish HTTP proxy tunnel to %s:%hu\n",
hostname, remote_port);
if(data->req.newurl) {
/* This only happens if we've looped here due to authentication
reasons, and we don't really use the newly cloned URL here
then. Just free() it. */
free(data->req.newurl);
data->req.newurl = NULL;
}
/* initialize a dynamic send-buffer */
req_buffer = Curl_add_buffer_init();
if(!req_buffer)
return CURLE_OUT_OF_MEMORY;
host_port = aprintf("%s:%hu", hostname, remote_port);
if(!host_port) {
free(req_buffer);
return CURLE_OUT_OF_MEMORY;
}
/* Setup the proxy-authorization header, if any */
result = Curl_http_output_auth(conn, "CONNECT", host_port, TRUE);
free(host_port);
if(CURLE_OK == result) {
char *host=(char *)"";
const char *proxyconn="";
const char *useragent="";
const char *http = (conn->proxytype == CURLPROXY_HTTP_1_0) ?
"1.0" : "1.1";
char *hostheader= /* host:port with IPv6 support */
aprintf("%s%s%s:%hu", conn->bits.ipv6_ip?"[":"",
hostname, conn->bits.ipv6_ip?"]":"",
remote_port);
if(!hostheader) {
free(req_buffer);
return CURLE_OUT_OF_MEMORY;
}
if(!Curl_checkheaders(data, "Host:")) {
host = aprintf("Host: %s\r\n", hostheader);
if(!host) {
free(hostheader);
free(req_buffer);
return CURLE_OUT_OF_MEMORY;
}
}
if(!Curl_checkheaders(data, "Proxy-Connection:"))
proxyconn = "Proxy-Connection: Keep-Alive\r\n";
if(!Curl_checkheaders(data, "User-Agent:") &&
data->set.str[STRING_USERAGENT])
useragent = conn->allocptr.uagent;
result =
Curl_add_bufferf(req_buffer,
"CONNECT %s HTTP/%s\r\n"
"%s" /* Host: */
"%s" /* Proxy-Authorization */
"%s" /* User-Agent */
"%s", /* Proxy-Connection */
hostheader,
http,
host,
conn->allocptr.proxyuserpwd?
conn->allocptr.proxyuserpwd:"",
useragent,
proxyconn);
if(host && *host)
free(host);
free(hostheader);
if(CURLE_OK == result)
result = Curl_add_custom_headers(conn, req_buffer);
if(CURLE_OK == result)
/* CRLF terminate the request */
result = Curl_add_bufferf(req_buffer, "\r\n");
if(CURLE_OK == result) {
/* Send the connect request to the proxy */
/* BLOCKING */
result =
Curl_add_buffer_send(req_buffer, conn,
&data->info.request_size, 0, sockindex);
}
req_buffer = NULL;
if(result)
failf(data, "Failed sending CONNECT to proxy");
}
Curl_safefree(req_buffer);
if(result)
return result;
conn->tunnel_state[sockindex] = TUNNEL_CONNECT;
/* now we've issued the CONNECT and we're waiting to hear back, return
and get called again polling-style */
return CURLE_OK;
} /* END CONNECT PHASE */
{ /* BEGIN NEGOTIATION PHASE */
size_t nread; /* total size read */
int perline; /* count bytes per line */
int keepon=TRUE;
ssize_t gotbytes;
char *ptr;
char *line_start;
ptr=data->state.buffer;
line_start = ptr;
nread=0;
perline=0;
keepon=TRUE;
while((nread<BUFSIZE) && (keepon && !error)) {
/* if timeout is requested, find out how much remaining time we have */
check = timeout - /* timeout time */
Curl_tvdiff(Curl_tvnow(), conn->now); /* spent time */
if(check <= 0) {
failf(data, "Proxy CONNECT aborted due to timeout");
error = SELECT_TIMEOUT; /* already too little time */
break;
}
/* loop every second at least, less if the timeout is near */
switch (Curl_socket_ready(tunnelsocket, CURL_SOCKET_BAD,
check<1000L?check:1000)) {
case -1: /* select() error, stop reading */
error = SELECT_ERROR;
failf(data, "Proxy CONNECT aborted due to select/poll error");
break;
case 0: /* timeout */
break;
default:
DEBUGASSERT(ptr+BUFSIZE-nread <= data->state.buffer+BUFSIZE+1);
result = Curl_read(conn, tunnelsocket, ptr, BUFSIZE-nread,
&gotbytes);
if(result==CURLE_AGAIN)
continue; /* go loop yourself */
else if(result)
keepon = FALSE;
else if(gotbytes <= 0) {
keepon = FALSE;
if(data->set.proxyauth && data->state.authproxy.avail) {
/* proxy auth was requested and there was proxy auth available,
then deem this as "mere" proxy disconnect */
conn->bits.proxy_connect_closed = TRUE;
}
else {
error = SELECT_ERROR;
failf(data, "Proxy CONNECT aborted");
}
}
else {
/*
* We got a whole chunk of data, which can be anything from one
* byte to a set of lines and possibly just a piece of the last
* line.
*/
int i;
nread += gotbytes;
if(keepon > TRUE) {
/* This means we are currently ignoring a response-body */
nread = 0; /* make next read start over in the read buffer */
ptr=data->state.buffer;
if(cl) {
/* A Content-Length based body: simply count down the counter
and make sure to break out of the loop when we're done! */
cl -= gotbytes;
if(cl<=0) {
keepon = FALSE;
break;
}
}
else {
/* chunked-encoded body, so we need to do the chunked dance
properly to know when the end of the body is reached */
CHUNKcode r;
ssize_t tookcareof=0;
/* now parse the chunked piece of data so that we can
properly tell when the stream ends */
r = Curl_httpchunk_read(conn, ptr, gotbytes, &tookcareof);
if(r == CHUNKE_STOP) {
/* we're done reading chunks! */
infof(data, "chunk reading DONE\n");
keepon = FALSE;
/* we did the full CONNECT treatment, go COMPLETE */
conn->tunnel_state[sockindex] = TUNNEL_COMPLETE;
}
else
infof(data, "Read %zd bytes of chunk, continue\n",
tookcareof);
}
}
else
for(i = 0; i < gotbytes; ptr++, i++) {
perline++; /* amount of bytes in this line so far */
if(*ptr == 0x0a) {
char letter;
int writetype;
/* convert from the network encoding */
result = Curl_convert_from_network(data, line_start,
perline);
/* Curl_convert_from_network calls failf if unsuccessful */
if(result)
return result;
/* output debug if that is requested */
if(data->set.verbose)
Curl_debug(data, CURLINFO_HEADER_IN,
line_start, (size_t)perline, conn);
/* send the header to the callback */
writetype = CLIENTWRITE_HEADER;
if(data->set.include_header)
writetype |= CLIENTWRITE_BODY;
result = Curl_client_write(conn, writetype, line_start,
perline);
data->info.header_size += (long)perline;
data->req.headerbytecount += (long)perline;
if(result)
return result;
/* Newlines are CRLF, so the CR is ignored as the line isn't
really terminated until the LF comes. Treat a following CR
as end-of-headers as well.*/
if(('\r' == line_start[0]) ||
('\n' == line_start[0])) {
/* end of response-headers from the proxy */
nread = 0; /* make next read start over in the read
buffer */
ptr=data->state.buffer;
if((407 == k->httpcode) && !data->state.authproblem) {
/* If we get a 407 response code with content length
when we have no auth problem, we must ignore the
whole response-body */
keepon = 2;
if(cl) {
infof(data, "Ignore %" FORMAT_OFF_T
" bytes of response-body\n", cl);
/* remove the remaining chunk of what we already
read */
cl -= (gotbytes - i);
if(cl<=0)
/* if the whole thing was already read, we are done!
*/
keepon=FALSE;
}
else if(chunked_encoding) {
CHUNKcode r;
/* We set ignorebody true here since the chunked
decoder function will acknowledge that. Pay
attention so that this is cleared again when this
function returns! */
k->ignorebody = TRUE;
infof(data, "%zd bytes of chunk left\n", gotbytes-i);
if(line_start[1] == '\n') {
/* this can only be a LF if the letter at index 0
was a CR */
line_start++;
i++;
}
/* now parse the chunked piece of data so that we can
properly tell when the stream ends */
r = Curl_httpchunk_read(conn, line_start+1,
gotbytes -i, &gotbytes);
if(r == CHUNKE_STOP) {
/* we're done reading chunks! */
infof(data, "chunk reading DONE\n");
keepon = FALSE;
/* we did the full CONNECT treatment, go to
COMPLETE */
conn->tunnel_state[sockindex] = TUNNEL_COMPLETE;
}
else
infof(data, "Read %zd bytes of chunk, continue\n",
gotbytes);
}
else {
/* without content-length or chunked encoding, we
can't keep the connection alive since the close is
the end signal so we bail out at once instead */
keepon=FALSE;
}
}
else {
keepon = FALSE;
if(200 == data->info.httpproxycode) {
if(gotbytes - (i+1))
failf(data, "Proxy CONNECT followed by %zd bytes "
"of opaque data. Data ignored (known bug #39)",
gotbytes - (i+1));
}
}
/* we did the full CONNECT treatment, go to COMPLETE */
conn->tunnel_state[sockindex] = TUNNEL_COMPLETE;
break; /* breaks out of for-loop, not switch() */
}
/* keep a backup of the position we are about to blank */
letter = line_start[perline];
line_start[perline]=0; /* zero terminate the buffer */
if((checkprefix("WWW-Authenticate:", line_start) &&
(401 == k->httpcode)) ||
(checkprefix("Proxy-authenticate:", line_start) &&
(407 == k->httpcode))) {
result = Curl_http_input_auth(conn, k->httpcode,
line_start);
if(result)
return result;
}
else if(checkprefix("Content-Length:", line_start)) {
cl = curlx_strtoofft(line_start +
strlen("Content-Length:"), NULL, 10);
}
else if(Curl_compareheader(line_start,
"Connection:", "close"))
closeConnection = TRUE;
else if(Curl_compareheader(line_start,
"Transfer-Encoding:",
"chunked")) {
infof(data, "CONNECT responded chunked\n");
chunked_encoding = TRUE;
/* init our chunky engine */
Curl_httpchunk_init(conn);
}
else if(Curl_compareheader(line_start,
"Proxy-Connection:", "close"))
closeConnection = TRUE;
else if(2 == sscanf(line_start, "HTTP/1.%d %d",
&subversion,
&k->httpcode)) {
/* store the HTTP code from the proxy */
data->info.httpproxycode = k->httpcode;
}
/* put back the letter we blanked out before */
line_start[perline]= letter;
perline=0; /* line starts over here */
line_start = ptr+1; /* this skips the zero byte we wrote */
}
}
}
break;
} /* switch */
if(Curl_pgrsUpdate(conn))
return CURLE_ABORTED_BY_CALLBACK;
} /* while there's buffer left and loop is requested */
if(error)
return CURLE_RECV_ERROR;
if(data->info.httpproxycode != 200) {
/* Deal with the possibly already received authenticate
headers. 'newurl' is set to a new URL if we must loop. */
result = Curl_http_auth_act(conn);
if(result)
return result;
if(conn->bits.close)
/* the connection has been marked for closure, most likely in the
Curl_http_auth_act() function and thus we can kill it at once
below
*/
closeConnection = TRUE;
}
if(closeConnection && data->req.newurl) {
/* Connection closed by server. Don't use it anymore */
Curl_closesocket(conn, conn->sock[sockindex]);
conn->sock[sockindex] = CURL_SOCKET_BAD;
break;
}
} /* END NEGOTIATION PHASE */
/* If we are supposed to continue and request a new URL, which basically
* means the HTTP authentication is still going on so if the tunnel
* is complete we start over in INIT state */
if(data->req.newurl &&
(TUNNEL_COMPLETE == conn->tunnel_state[sockindex])) {
conn->tunnel_state[sockindex] = TUNNEL_INIT;
infof(data, "TUNNEL_STATE switched to: %d\n",
conn->tunnel_state[sockindex]);
}
} while(data->req.newurl);
if(200 != data->req.httpcode) {
failf(data, "Received HTTP code %d from proxy after CONNECT",
data->req.httpcode);
if(closeConnection && data->req.newurl)
conn->bits.proxy_connect_closed = TRUE;
if(data->req.newurl) {
/* this won't be used anymore for the CONNECT so free it now */
free(data->req.newurl);
data->req.newurl = NULL;
}
/* to back to init state */
conn->tunnel_state[sockindex] = TUNNEL_INIT;
return CURLE_RECV_ERROR;
}
conn->tunnel_state[sockindex] = TUNNEL_COMPLETE;
/* If a proxy-authorization header was used for the proxy, then we should
make sure that it isn't accidentally used for the document request
after we've connected. So let's free and clear it here. */
Curl_safefree(conn->allocptr.proxyuserpwd);
conn->allocptr.proxyuserpwd = NULL;
data->state.authproxy.done = TRUE;
infof (data, "Proxy replied OK to CONNECT request\n");
data->req.ignorebody = FALSE; /* put it (back) to non-ignore state */
conn->bits.rewindaftersend = FALSE; /* make sure this isn't set for the
document request */
return CURLE_OK;
}
/*
* Curl_pp_readresp()
*
* Reads a piece of a server response.
*/
CURLcode Curl_pp_readresp(curl_socket_t sockfd,
struct pingpong *pp,
int *code, /* return the server code if done */
size_t *size) /* size of the response */
{
ssize_t perline; /* count bytes per line */
bool keepon=TRUE;
ssize_t gotbytes;
char *ptr;
struct connectdata *conn = pp->conn;
struct SessionHandle *data = conn->data;
char * const buf = data->state.buffer;
CURLcode result = CURLE_OK;
*code = 0; /* 0 for errors or not done */
*size = 0;
ptr=buf + pp->nread_resp;
/* number of bytes in the current line, so far */
perline = (ssize_t)(ptr-pp->linestart_resp);
keepon=TRUE;
while((pp->nread_resp<BUFSIZE) && (keepon && !result)) {
if(pp->cache) {
/* we had data in the "cache", copy that instead of doing an actual
* read
*
* ftp->cache_size is cast to int here. This should be safe,
* because it would have been populated with something of size
* int to begin with, even though its datatype may be larger
* than an int.
*/
DEBUGASSERT((ptr+pp->cache_size) <= (buf+BUFSIZE+1));
memcpy(ptr, pp->cache, pp->cache_size);
gotbytes = pp->cache_size;
free(pp->cache); /* free the cache */
pp->cache = NULL; /* clear the pointer */
pp->cache_size = 0; /* zero the size just in case */
}
else {
int res;
#if defined(HAVE_KRB4) || defined(HAVE_GSSAPI)
enum protection_level prot = conn->data_prot;
conn->data_prot = 0;
#endif
DEBUGASSERT((ptr+BUFSIZE-pp->nread_resp) <= (buf+BUFSIZE+1));
res = Curl_read(conn, sockfd, ptr, BUFSIZE-pp->nread_resp,
&gotbytes);
#if defined(HAVE_KRB4) || defined(HAVE_GSSAPI)
conn->data_prot = prot;
#endif
if(res < 0)
/* EWOULDBLOCK */
return CURLE_OK; /* return */
#ifdef CURL_DOES_CONVERSIONS
if((res == CURLE_OK) && (gotbytes > 0)) {
/* convert from the network encoding */
res = Curl_convert_from_network(data, ptr, gotbytes);
/* Curl_convert_from_network calls failf if unsuccessful */
}
#endif /* CURL_DOES_CONVERSIONS */
if(CURLE_OK != res) {
result = (CURLcode)res; /* Set outer result variable to this error. */
keepon = FALSE;
}
}
if(!keepon)
;
else if(gotbytes <= 0) {
keepon = FALSE;
result = CURLE_RECV_ERROR;
failf(data, "FTP response reading failed");
}
else {
/* we got a whole chunk of data, which can be anything from one
* byte to a set of lines and possible just a piece of the last
* line */
ssize_t i;
ssize_t clipamount = 0;
bool restart = FALSE;
data->req.headerbytecount += (long)gotbytes;
pp->nread_resp += gotbytes;
for(i = 0; i < gotbytes; ptr++, i++) {
perline++;
if(*ptr=='\n') {
/* a newline is CRLF in ftp-talk, so the CR is ignored as
the line isn't really terminated until the LF comes */
/* output debug output if that is requested */
#if defined(HAVE_KRB4) || defined(HAVE_GSSAPI)
if(!conn->sec_complete)
#endif
if(data->set.verbose)
Curl_debug(data, CURLINFO_HEADER_IN,
pp->linestart_resp, (size_t)perline, conn);
/*
* We pass all response-lines to the callback function registered
* for "headers". The response lines can be seen as a kind of
* headers.
*/
result = Curl_client_write(conn, CLIENTWRITE_HEADER,
pp->linestart_resp, perline);
if(result)
return result;
if(pp->endofresp(pp, code)) {
/* This is the end of the last line, copy the last line to the
start of the buffer and zero terminate, for old times sake (and
krb4)! */
char *meow;
int n;
for(meow=pp->linestart_resp, n=0; meow<ptr; meow++, n++)
buf[n] = *meow;
*meow=0; /* zero terminate */
keepon=FALSE;
pp->linestart_resp = ptr+1; /* advance pointer */
i++; /* skip this before getting out */
*size = pp->nread_resp; /* size of the response */
pp->nread_resp = 0; /* restart */
break;
}
perline=0; /* line starts over here */
pp->linestart_resp = ptr+1;
}
}
if(!keepon && (i != gotbytes)) {
/* We found the end of the response lines, but we didn't parse the
full chunk of data we have read from the server. We therefore need
to store the rest of the data to be checked on the next invoke as
it may actually contain another end of response already! */
clipamount = gotbytes - i;
restart = TRUE;
}
else if(keepon) {
if((perline == gotbytes) && (gotbytes > BUFSIZE/2)) {
/* We got an excessive line without newlines and we need to deal
with it. We keep the first bytes of the line then we throw
away the rest. */
infof(data, "Excessive server response line length received, %zd bytes."
" Stripping\n", gotbytes);
restart = TRUE;
/* we keep 40 bytes since all our pingpong protocols are only
interested in the first piece */
clipamount = 40;
}
else if(pp->nread_resp > BUFSIZE/2) {
/* We got a large chunk of data and there's potentially still trailing
data to take care of, so we put any such part in the "cache", clear
the buffer to make space and restart. */
clipamount = perline;
restart = TRUE;
}
}
else if(i == gotbytes)
restart = TRUE;
if(clipamount) {
pp->cache_size = clipamount;
pp->cache = malloc(pp->cache_size);
if(pp->cache)
memcpy(pp->cache, pp->linestart_resp, pp->cache_size);
else
return CURLE_OUT_OF_MEMORY;
}
if(restart) {
/* now reset a few variables to start over nicely from the start of
the big buffer */
pp->nread_resp = 0; /* start over from scratch in the buffer */
ptr = pp->linestart_resp = buf;
perline = 0;
}
} /* there was data */
} /* while there's buffer left and loop is requested */
pp->pending_resp = FALSE;
return result;
}
/***********************************************************************
*
* Curl_pp_sendfv()
*
* Send the formated string as a command to a pingpong server. Note that
* the string should not have any CRLF appended, as this function will
* append the necessary things itself.
*
* NOTE: we build the command in a fixed-length buffer, which sets length
* restrictions on the command!
*
* made to never block
*/
CURLcode Curl_pp_vsendf(struct pingpong *pp,
const char *fmt,
va_list args)
{
ssize_t bytes_written;
/* may still not be big enough for some krb5 tokens */
#define SBUF_SIZE 1024
char s[SBUF_SIZE];
size_t write_len;
char *sptr=s;
CURLcode res = CURLE_OK;
struct connectdata *conn = pp->conn;
struct SessionHandle *data = conn->data;
#if defined(HAVE_KRB4) || defined(HAVE_GSSAPI)
enum protection_level data_sec = conn->data_prot;
#endif
vsnprintf(s, SBUF_SIZE-3, fmt, args);
strcat(s, "\r\n"); /* append a trailing CRLF */
bytes_written=0;
write_len = strlen(s);
Curl_pp_init(pp);
#ifdef CURL_DOES_CONVERSIONS
res = Curl_convert_to_network(data, s, write_len);
/* Curl_convert_to_network calls failf if unsuccessful */
if(res != CURLE_OK) {
return res;
}
#endif /* CURL_DOES_CONVERSIONS */
#if defined(HAVE_KRB4) || defined(HAVE_GSSAPI)
conn->data_prot = prot_cmd;
#endif
res = Curl_write(conn, conn->sock[FIRSTSOCKET], sptr, write_len,
&bytes_written);
#if defined(HAVE_KRB4) || defined(HAVE_GSSAPI)
conn->data_prot = data_sec;
#endif
if(CURLE_OK != res)
return res;
if(conn->data->set.verbose)
Curl_debug(conn->data, CURLINFO_HEADER_OUT,
sptr, (size_t)bytes_written, conn);
if(bytes_written != (ssize_t)write_len) {
/* the whole chunk was not sent, store the rest of the data */
write_len -= bytes_written;
sptr += bytes_written;
pp->sendthis = malloc(write_len);
if(pp->sendthis) {
memcpy(pp->sendthis, sptr, write_len);
pp->sendsize = pp->sendleft = write_len;
}
else {
failf(data, "out of memory");
res = CURLE_OUT_OF_MEMORY;
}
}
else
pp->response = Curl_tvnow();
return res;
}
static CURLcode CONNECT(struct connectdata *conn,
int sockindex,
const char *hostname,
int remote_port)
{
int subversion = 0;
struct Curl_easy *data = conn->data;
struct SingleRequest *k = &data->req;
CURLcode result;
curl_socket_t tunnelsocket = conn->sock[sockindex];
struct http_connect_state *s = conn->connect_state;
#define SELECT_OK 0
#define SELECT_ERROR 1
if(Curl_connect_complete(conn))
return CURLE_OK; /* CONNECT is already completed */
conn->bits.proxy_connect_closed = FALSE;
do {
timediff_t check;
if(TUNNEL_INIT == s->tunnel_state) {
/* BEGIN CONNECT PHASE */
char *host_port;
Curl_send_buffer *req_buffer;
infof(data, "Establish HTTP proxy tunnel to %s:%d\n",
hostname, remote_port);
/* This only happens if we've looped here due to authentication
reasons, and we don't really use the newly cloned URL here
then. Just free() it. */
free(data->req.newurl);
data->req.newurl = NULL;
/* initialize a dynamic send-buffer */
req_buffer = Curl_add_buffer_init();
if(!req_buffer)
return CURLE_OUT_OF_MEMORY;
host_port = aprintf("%s:%d", hostname, remote_port);
if(!host_port) {
Curl_add_buffer_free(req_buffer);
return CURLE_OUT_OF_MEMORY;
}
/* Setup the proxy-authorization header, if any */
result = Curl_http_output_auth(conn, "CONNECT", host_port, TRUE);
free(host_port);
if(!result) {
char *host = NULL;
const char *proxyconn = "";
const char *useragent = "";
const char *http = (conn->http_proxy.proxytype == CURLPROXY_HTTP_1_0) ?
"1.0" : "1.1";
bool ipv6_ip = conn->bits.ipv6_ip;
char *hostheader;
/* the hostname may be different */
if(hostname != conn->host.name)
ipv6_ip = (strchr(hostname, ':') != NULL);
hostheader = /* host:port with IPv6 support */
aprintf("%s%s%s:%d", ipv6_ip?"[":"", hostname, ipv6_ip?"]":"",
remote_port);
if(!hostheader) {
Curl_add_buffer_free(req_buffer);
return CURLE_OUT_OF_MEMORY;
}
if(!Curl_checkProxyheaders(conn, "Host")) {
host = aprintf("Host: %s\r\n", hostheader);
if(!host) {
free(hostheader);
Curl_add_buffer_free(req_buffer);
return CURLE_OUT_OF_MEMORY;
}
}
if(!Curl_checkProxyheaders(conn, "Proxy-Connection"))
proxyconn = "Proxy-Connection: Keep-Alive\r\n";
if(!Curl_checkProxyheaders(conn, "User-Agent") &&
data->set.str[STRING_USERAGENT])
useragent = conn->allocptr.uagent;
result =
Curl_add_bufferf(req_buffer,
"CONNECT %s HTTP/%s\r\n"
"%s" /* Host: */
"%s" /* Proxy-Authorization */
"%s" /* User-Agent */
"%s", /* Proxy-Connection */
hostheader,
http,
host?host:"",
conn->allocptr.proxyuserpwd?
conn->allocptr.proxyuserpwd:"",
useragent,
proxyconn);
if(host)
free(host);
free(hostheader);
if(!result)
result = Curl_add_custom_headers(conn, TRUE, req_buffer);
if(!result)
/* CRLF terminate the request */
result = Curl_add_bufferf(req_buffer, "\r\n");
if(!result) {
/* Send the connect request to the proxy */
/* BLOCKING */
result =
Curl_add_buffer_send(req_buffer, conn,
&data->info.request_size, 0, sockindex);
}
req_buffer = NULL;
if(result)
failf(data, "Failed sending CONNECT to proxy");
}
Curl_add_buffer_free(req_buffer);
if(result)
return result;
s->tunnel_state = TUNNEL_CONNECT;
s->perline = 0;
} /* END CONNECT PHASE */
check = Curl_timeleft(data, NULL, TRUE);
if(check <= 0) {
failf(data, "Proxy CONNECT aborted due to timeout");
return CURLE_OPERATION_TIMEDOUT;
}
if(!Curl_conn_data_pending(conn, sockindex))
/* return so we'll be called again polling-style */
return CURLE_OK;
/* at this point, the tunnel_connecting phase is over. */
{ /* READING RESPONSE PHASE */
int error = SELECT_OK;
while(s->keepon && !error) {
ssize_t gotbytes;
/* make sure we have space to read more data */
if(s->ptr >= &s->connect_buffer[CONNECT_BUFFER_SIZE]) {
failf(data, "CONNECT response too large!");
return CURLE_RECV_ERROR;
}
/* Read one byte at a time to avoid a race condition. Wait at most one
second before looping to ensure continuous pgrsUpdates. */
result = Curl_read(conn, tunnelsocket, s->ptr, 1, &gotbytes);
if(result == CURLE_AGAIN)
/* socket buffer drained, return */
return CURLE_OK;
if(Curl_pgrsUpdate(conn))
return CURLE_ABORTED_BY_CALLBACK;
if(result) {
s->keepon = FALSE;
break;
}
else if(gotbytes <= 0) {
if(data->set.proxyauth && data->state.authproxy.avail) {
/* proxy auth was requested and there was proxy auth available,
then deem this as "mere" proxy disconnect */
conn->bits.proxy_connect_closed = TRUE;
infof(data, "Proxy CONNECT connection closed\n");
}
else {
error = SELECT_ERROR;
failf(data, "Proxy CONNECT aborted");
}
s->keepon = FALSE;
break;
}
if(s->keepon > TRUE) {
/* This means we are currently ignoring a response-body */
s->ptr = s->connect_buffer;
if(s->cl) {
/* A Content-Length based body: simply count down the counter
and make sure to break out of the loop when we're done! */
s->cl--;
if(s->cl <= 0) {
s->keepon = FALSE;
s->tunnel_state = TUNNEL_COMPLETE;
break;
}
}
else {
/* chunked-encoded body, so we need to do the chunked dance
properly to know when the end of the body is reached */
CHUNKcode r;
ssize_t tookcareof = 0;
/* now parse the chunked piece of data so that we can
properly tell when the stream ends */
r = Curl_httpchunk_read(conn, s->ptr, 1, &tookcareof);
if(r == CHUNKE_STOP) {
/* we're done reading chunks! */
infof(data, "chunk reading DONE\n");
s->keepon = FALSE;
/* we did the full CONNECT treatment, go COMPLETE */
s->tunnel_state = TUNNEL_COMPLETE;
}
}
continue;
}
s->perline++; /* amount of bytes in this line so far */
/* if this is not the end of a header line then continue */
if(*s->ptr != 0x0a) {
s->ptr++;
continue;
}
/* convert from the network encoding */
result = Curl_convert_from_network(data, s->line_start,
(size_t)s->perline);
/* Curl_convert_from_network calls failf if unsuccessful */
if(result)
return result;
/* output debug if that is requested */
if(data->set.verbose)
Curl_debug(data, CURLINFO_HEADER_IN,
s->line_start, (size_t)s->perline);
if(!data->set.suppress_connect_headers) {
/* send the header to the callback */
int writetype = CLIENTWRITE_HEADER;
if(data->set.include_header)
writetype |= CLIENTWRITE_BODY;
result = Curl_client_write(conn, writetype,
s->line_start, s->perline);
if(result)
return result;
}
data->info.header_size += (long)s->perline;
data->req.headerbytecount += (long)s->perline;
/* Newlines are CRLF, so the CR is ignored as the line isn't
really terminated until the LF comes. Treat a following CR
as end-of-headers as well.*/
if(('\r' == s->line_start[0]) ||
('\n' == s->line_start[0])) {
/* end of response-headers from the proxy */
s->ptr = s->connect_buffer;
if((407 == k->httpcode) && !data->state.authproblem) {
/* If we get a 407 response code with content length
when we have no auth problem, we must ignore the
whole response-body */
s->keepon = 2;
if(s->cl) {
infof(data, "Ignore %" CURL_FORMAT_CURL_OFF_T
" bytes of response-body\n", s->cl);
}
else if(s->chunked_encoding) {
CHUNKcode r;
infof(data, "Ignore chunked response-body\n");
/* We set ignorebody true here since the chunked
decoder function will acknowledge that. Pay
attention so that this is cleared again when this
function returns! */
k->ignorebody = TRUE;
if(s->line_start[1] == '\n') {
/* this can only be a LF if the letter at index 0
was a CR */
s->line_start++;
}
/* now parse the chunked piece of data so that we can
properly tell when the stream ends */
r = Curl_httpchunk_read(conn, s->line_start + 1, 1, &gotbytes);
if(r == CHUNKE_STOP) {
/* we're done reading chunks! */
infof(data, "chunk reading DONE\n");
s->keepon = FALSE;
/* we did the full CONNECT treatment, go to COMPLETE */
s->tunnel_state = TUNNEL_COMPLETE;
}
}
else {
/* without content-length or chunked encoding, we
can't keep the connection alive since the close is
the end signal so we bail out at once instead */
s->keepon = FALSE;
}
}
else
s->keepon = FALSE;
if(!s->cl)
/* we did the full CONNECT treatment, go to COMPLETE */
s->tunnel_state = TUNNEL_COMPLETE;
continue;
}
s->line_start[s->perline] = 0; /* zero terminate the buffer */
if((checkprefix("WWW-Authenticate:", s->line_start) &&
(401 == k->httpcode)) ||
(checkprefix("Proxy-authenticate:", s->line_start) &&
(407 == k->httpcode))) {
bool proxy = (k->httpcode == 407) ? TRUE : FALSE;
char *auth = Curl_copy_header_value(s->line_start);
if(!auth)
return CURLE_OUT_OF_MEMORY;
result = Curl_http_input_auth(conn, proxy, auth);
free(auth);
if(result)
return result;
}
else if(checkprefix("Content-Length:", s->line_start)) {
if(k->httpcode/100 == 2) {
/* A client MUST ignore any Content-Length or Transfer-Encoding
header fields received in a successful response to CONNECT.
"Successful" described as: 2xx (Successful). RFC 7231 4.3.6 */
infof(data, "Ignoring Content-Length in CONNECT %03d response\n",
k->httpcode);
}
else {
(void)curlx_strtoofft(s->line_start +
strlen("Content-Length:"), NULL, 10, &s->cl);
}
}
else if(Curl_compareheader(s->line_start, "Connection:", "close"))
s->close_connection = TRUE;
else if(checkprefix("Transfer-Encoding:", s->line_start)) {
if(k->httpcode/100 == 2) {
/* A client MUST ignore any Content-Length or Transfer-Encoding
header fields received in a successful response to CONNECT.
"Successful" described as: 2xx (Successful). RFC 7231 4.3.6 */
infof(data, "Ignoring Transfer-Encoding in "
"CONNECT %03d response\n", k->httpcode);
}
else if(Curl_compareheader(s->line_start,
"Transfer-Encoding:", "chunked")) {
infof(data, "CONNECT responded chunked\n");
s->chunked_encoding = TRUE;
/* init our chunky engine */
Curl_httpchunk_init(conn);
}
}
else if(Curl_compareheader(s->line_start,
"Proxy-Connection:", "close"))
s->close_connection = TRUE;
else if(2 == sscanf(s->line_start, "HTTP/1.%d %d",
&subversion,
&k->httpcode)) {
/* store the HTTP code from the proxy */
data->info.httpproxycode = k->httpcode;
}
s->perline = 0; /* line starts over here */
s->ptr = s->connect_buffer;
s->line_start = s->ptr;
} /* while there's buffer left and loop is requested */
if(Curl_pgrsUpdate(conn))
return CURLE_ABORTED_BY_CALLBACK;
if(error)
return CURLE_RECV_ERROR;
if(data->info.httpproxycode/100 != 2) {
/* Deal with the possibly already received authenticate
headers. 'newurl' is set to a new URL if we must loop. */
result = Curl_http_auth_act(conn);
if(result)
return result;
if(conn->bits.close)
/* the connection has been marked for closure, most likely in the
Curl_http_auth_act() function and thus we can kill it at once
below */
s->close_connection = TRUE;
}
if(s->close_connection && data->req.newurl) {
/* Connection closed by server. Don't use it anymore */
Curl_closesocket(conn, conn->sock[sockindex]);
conn->sock[sockindex] = CURL_SOCKET_BAD;
break;
}
} /* END READING RESPONSE PHASE */
/* If we are supposed to continue and request a new URL, which basically
* means the HTTP authentication is still going on so if the tunnel
* is complete we start over in INIT state */
if(data->req.newurl && (TUNNEL_COMPLETE == s->tunnel_state)) {
connect_init(conn, TRUE); /* reinit */
}
} while(data->req.newurl);
if(data->info.httpproxycode/100 != 2) {
if(s->close_connection && data->req.newurl) {
conn->bits.proxy_connect_closed = TRUE;
infof(data, "Connect me again please\n");
connect_done(conn);
}
else {
free(data->req.newurl);
data->req.newurl = NULL;
/* failure, close this connection to avoid re-use */
streamclose(conn, "proxy CONNECT failure");
Curl_closesocket(conn, conn->sock[sockindex]);
conn->sock[sockindex] = CURL_SOCKET_BAD;
}
/* to back to init state */
s->tunnel_state = TUNNEL_INIT;
if(conn->bits.proxy_connect_closed)
/* this is not an error, just part of the connection negotiation */
return CURLE_OK;
failf(data, "Received HTTP code %d from proxy after CONNECT",
data->req.httpcode);
return CURLE_RECV_ERROR;
}
s->tunnel_state = TUNNEL_COMPLETE;
/* If a proxy-authorization header was used for the proxy, then we should
make sure that it isn't accidentally used for the document request
after we've connected. So let's free and clear it here. */
Curl_safefree(conn->allocptr.proxyuserpwd);
conn->allocptr.proxyuserpwd = NULL;
data->state.authproxy.done = TRUE;
infof(data, "Proxy replied %d to CONNECT request\n",
data->info.httpproxycode);
data->req.ignorebody = FALSE; /* put it (back) to non-ignore state */
conn->bits.rewindaftersend = FALSE; /* make sure this isn't set for the
document request */
return CURLE_OK;
}
/***********************************************************************
*
* Curl_pp_vsendf()
*
* Send the formatted string as a command to a pingpong server. Note that
* the string should not have any CRLF appended, as this function will
* append the necessary things itself.
*
* made to never block
*/
CURLcode Curl_pp_vsendf(struct pingpong *pp,
const char *fmt,
va_list args)
{
ssize_t bytes_written;
size_t write_len;
char *fmt_crlf;
char *s;
CURLcode result;
struct connectdata *conn = pp->conn;
struct Curl_easy *data;
#ifdef HAVE_GSSAPI
enum protection_level data_sec;
#endif
DEBUGASSERT(pp->sendleft == 0);
DEBUGASSERT(pp->sendsize == 0);
DEBUGASSERT(pp->sendthis == NULL);
if(!conn)
/* can't send without a connection! */
return CURLE_SEND_ERROR;
data = conn->data;
fmt_crlf = aprintf("%s\r\n", fmt); /* append a trailing CRLF */
if(!fmt_crlf)
return CURLE_OUT_OF_MEMORY;
s = vaprintf(fmt_crlf, args); /* trailing CRLF appended */
free(fmt_crlf);
if(!s)
return CURLE_OUT_OF_MEMORY;
bytes_written = 0;
write_len = strlen(s);
Curl_pp_init(pp);
result = Curl_convert_to_network(data, s, write_len);
/* Curl_convert_to_network calls failf if unsuccessful */
if(result) {
free(s);
return result;
}
#ifdef HAVE_GSSAPI
conn->data_prot = PROT_CMD;
#endif
result = Curl_write(conn, conn->sock[FIRSTSOCKET], s, write_len,
&bytes_written);
#ifdef HAVE_GSSAPI
data_sec = conn->data_prot;
DEBUGASSERT(data_sec > PROT_NONE && data_sec < PROT_LAST);
conn->data_prot = data_sec;
#endif
if(result) {
free(s);
return result;
}
if(conn->data->set.verbose)
Curl_debug(conn->data, CURLINFO_HEADER_OUT,
s, (size_t)bytes_written, conn);
if(bytes_written != (ssize_t)write_len) {
/* the whole chunk was not sent, keep it around and adjust sizes */
pp->sendthis = s;
pp->sendsize = write_len;
pp->sendleft = write_len - bytes_written;
}
else {
free(s);
pp->sendthis = NULL;
pp->sendleft = pp->sendsize = 0;
pp->response = Curl_now();
}
return CURLE_OK;
}
