diff options
Diffstat (limited to 'lib/http_proxy.c')
| -rw-r--r-- | lib/http_proxy.c | 461 |
1 files changed, 229 insertions, 232 deletions
diff --git a/lib/http_proxy.c b/lib/http_proxy.c index f4e98e534..e0213f34d 100644 --- a/lib/http_proxy.c +++ b/lib/http_proxy.c @@ -285,7 +285,7 @@ CURLcode Curl_proxyCONNECT(struct connectdata *conn, } if(!blocking) { - if(0 == SOCKET_READABLE(tunnelsocket, 0)) + if(!Curl_conn_data_pending(conn, sockindex)) /* return so we'll be called again polling-style */ return CURLE_OK; else { @@ -304,13 +304,22 @@ CURLcode Curl_proxyCONNECT(struct connectdata *conn, char *ptr; char *line_start; - ptr=data->state.buffer; + ptr = data->state.buffer; line_start = ptr; - nread=0; - perline=0; + nread = 0; + perline = 0; - while((nread<BUFSIZE) && (keepon && !error)) { + while(nread < BUFSIZE && keepon && !error) { + int writetype; + + if(Curl_pgrsUpdate(conn)) + return CURLE_ABORTED_BY_CALLBACK; + + if(ptr >= &data->state.buffer[BUFSIZE]) { + failf(data, "CONNECT response too large!"); + return CURLE_RECV_ERROR; + } check = Curl_timeleft(data, NULL, TRUE); if(check <= 0) { @@ -319,244 +328,233 @@ CURLcode Curl_proxyCONNECT(struct connectdata *conn, break; } - /* loop every second at least, less if the timeout is near */ - switch(SOCKET_READABLE(tunnelsocket, 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 */ + /* 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, ptr, 1, &gotbytes); + if(result == CURLE_AGAIN) { + if(SOCKET_READABLE(tunnelsocket, check<1000L?check:1000) == -1) { + error = SELECT_ERROR; + failf(data, "Proxy CONNECT aborted due to select/poll error"); + break; + } + continue; + } + else if(result) { + keepon = FALSE; break; - default: - if(ptr >= &data->state.buffer[BUFSIZE]) { - failf(data, "CONNECT response too large!"); - return CURLE_RECV_ERROR; + } + 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"); } - result = Curl_read(conn, tunnelsocket, ptr, 1, &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; - infof(data, "Proxy CONNECT connection closed\n"); - } - else { - error = SELECT_ERROR; - failf(data, "Proxy CONNECT aborted"); + else { + error = SELECT_ERROR; + failf(data, "Proxy CONNECT aborted"); + } + keepon = FALSE; + break; + } + + /* We got a byte of data */ + nread++; + + 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--; + if(cl <= 0) { + keepon = FALSE; + break; } } else { - /* We got a byte of data */ - nread++; - - 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--; - if(cl<=0) { - keepon = FALSE; - break; - } + /* 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, 1, &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; + } + } + continue; + } + + perline++; /* amount of bytes in this line so far */ + + /* if this is not the end of a header line then continue */ + if(*ptr != 0x0a) { + ptr++; + continue; + } + + /* 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 %" CURL_FORMAT_CURL_OFF_T + " bytes of response-body\n", cl); + } + else if(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(line_start[1] == '\n') { + /* this can only be a LF if the letter at index 0 + was a CR */ + line_start++; } - 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, 1, &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); + + /* 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, 1, &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 { - perline++; /* amount of bytes in this line so far */ - if(*ptr == 0x0a) { - 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 %" CURL_FORMAT_CURL_OFF_T - " bytes of response-body\n", cl); - } - 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; - - if(line_start[1] == '\n') { - /* this can only be a LF if the letter at index 0 - was a CR */ - line_start++; - } - - /* 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, 1, - &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; - /* we did the full CONNECT treatment, go to COMPLETE */ - conn->tunnel_state[sockindex] = TUNNEL_COMPLETE; - break; /* breaks out of for-loop, not switch() */ - } - - 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))) { - - bool proxy = (k->httpcode == 407) ? TRUE : FALSE; - char *auth = Curl_copy_header_value(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:", line_start)) { - if(k->httpcode/100 == 2) { - /* A server MUST NOT send any Transfer-Encoding or - Content-Length header fields in a 2xx (Successful) - response to CONNECT. (RFC 7231 section 4.3.6) */ - failf(data, "Content-Length: in %03d response", - k->httpcode); - return CURLE_RECV_ERROR; - } - - 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")) { - if(k->httpcode/100 == 2) { - /* A server MUST NOT send any Transfer-Encoding or - Content-Length header fields in a 2xx (Successful) - response to CONNECT. (RFC 7231 section 4.3.6) */ - failf(data, "Transfer-Encoding: in %03d response", - k->httpcode); - return CURLE_RECV_ERROR; - } - 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; - } - - perline=0; /* line starts over here */ - ptr = data->state.buffer; - line_start = ptr; - } - else /* not end of header line */ - ptr++; + /* 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; } } - break; - } /* switch */ - if(Curl_pgrsUpdate(conn)) - return CURLE_ABORTED_BY_CALLBACK; + else + keepon = FALSE; + /* we did the full CONNECT treatment, go to COMPLETE */ + conn->tunnel_state[sockindex] = TUNNEL_COMPLETE; + continue; + } + + 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))) { + + bool proxy = (k->httpcode == 407) ? TRUE : FALSE; + char *auth = Curl_copy_header_value(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:", line_start)) { + if(k->httpcode/100 == 2) { + /* A server MUST NOT send any Transfer-Encoding or + Content-Length header fields in a 2xx (Successful) + response to CONNECT. (RFC 7231 section 4.3.6) */ + failf(data, "Content-Length: in %03d response", + k->httpcode); + return CURLE_RECV_ERROR; + } + + 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")) { + if(k->httpcode/100 == 2) { + /* A server MUST NOT send any Transfer-Encoding or + Content-Length header fields in a 2xx (Successful) + response to CONNECT. (RFC 7231 section 4.3.6) */ + failf(data, "Transfer-Encoding: in %03d response", k->httpcode); + return CURLE_RECV_ERROR; + } + 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; + } + + perline = 0; /* line starts over here */ + ptr = data->state.buffer; + line_start = 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; @@ -570,8 +568,7 @@ CURLcode Curl_proxyCONNECT(struct connectdata *conn, 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 - */ + below */ closeConnection = TRUE; } |