#include <netdb.h>
#endif
-#ifdef LWS_OPENSSL_SUPPORT
-extern int openssl_websocket_private_data_index;
-#endif
-
-int lws_client_socket_service(struct libwebsocket_context *context, struct libwebsocket *wsi, struct pollfd *pollfd)
+int lws_client_socket_service(struct libwebsocket_context *context,
+ struct libwebsocket *wsi, struct pollfd *pollfd)
{
int n;
- char pkt[1024];
- char *p = &pkt[0];
+ char *p = (char *)&context->service_buffer[0];
int len;
char c;
-#ifdef LWS_OPENSSL_SUPPORT
- char ssl_err_buf[512];
-#endif
switch (wsi->mode) {
return 0;
}
- n = recv(wsi->sock, pkt, sizeof pkt, 0);
+ n = recv(wsi->sock, context->service_buffer,
+ sizeof(context->service_buffer), 0);
if (n < 0) {
libwebsocket_close_and_free_session(context, wsi,
LWS_CLOSE_STATUS_NOSTATUS);
return 0;
}
- pkt[13] = '\0';
- if (strcmp(pkt, "HTTP/1.0 200 ") != 0) {
+ context->service_buffer[13] = '\0';
+ if (strcmp((char *)context->service_buffer, "HTTP/1.0 200 ")) {
libwebsocket_close_and_free_session(context, wsi,
LWS_CLOSE_STATUS_NOSTATUS);
- lwsl_err("ERROR from proxy: %s\n", pkt);
+ lwsl_err("ERROR proxy: %s\n", context->service_buffer);
return 0;
}
/* external POLL support via protocol 0 */
context->protocols[0].callback(context, wsi,
LWS_CALLBACK_CLEAR_MODE_POLL_FD,
- (void *)(long)wsi->sock, NULL, POLLOUT);
+ wsi->user_space, (void *)(long)wsi->sock, POLLOUT);
- /* we can retry this... so just cook the SSL BIO the first time */
+ /* we can retry this... just cook the SSL BIO the first time */
if (wsi->use_ssl && !wsi->ssl) {
wsi->ssl = SSL_new(context->ssl_client_ctx);
- wsi->client_bio = BIO_new_socket(wsi->sock,
- BIO_NOCLOSE);
+
+#ifdef USE_CYASSL
+ /*
+ * CyaSSL does certificate verification differently
+ * from OpenSSL.
+ * If we should ignore the certificate, we need to set
+ * this before SSL_new and SSL_connect is called.
+ * Otherwise the connect will simply fail with error
+ * code -155
+ */
+ if (wsi->use_ssl == 2)
+ CyaSSL_set_verify(wsi->ssl,
+ SSL_VERIFY_NONE, NULL);
+#endif /* USE_CYASSL */
+
+ wsi->client_bio =
+ BIO_new_socket(wsi->sock, BIO_NOCLOSE);
SSL_set_bio(wsi->ssl, wsi->client_bio, wsi->client_bio);
+#ifdef USE_CYASSL
+ CyaSSL_set_using_nonblock(wsi->ssl, 1);
+#else
+ BIO_set_nbio(wsi->client_bio, 1); /* nonblocking */
+#endif
+
SSL_set_ex_data(wsi->ssl,
openssl_websocket_private_data_index,
context);
- }
+ }
if (wsi->use_ssl) {
+ lws_latency_pre(context, wsi);
n = SSL_connect(wsi->ssl);
+ lws_latency(context, wsi,
+ "SSL_connect LWS_CONNMODE_WS_CLIENT_ISSUE_HANDSHAKE",
+ n, n > 0);
if (n < 0) {
n = SSL_get_error(wsi->ssl, n);
if (n == SSL_ERROR_WANT_READ ||
n == SSL_ERROR_WANT_WRITE) {
/*
- * wants us to retry connect due to state of the
- * underlying ssl layer... but since it may be
- * stalled on blocked write, no incoming data may
- * arrive to trigger the retry. Force (possibly
- * many if the SSL state persists in returning the
- * condition code, but other sockets are getting
- * serviced inbetweentimes) us to get called back
- * when writable.
+ * wants us to retry connect due to
+ * state of the underlying ssl layer...
+ * but since it may be stalled on
+ * blocked write, no incoming data may
+ * arrive to trigger the retry.
+ * Force (possibly many times if the SSL
+ * state persists in returning the
+ * condition code, but other sockets
+ * are getting serviced inbetweentimes)
+ * us to get called back when writable.
*/
- lwsl_info("SSL_connect -> SSL_ERROR_WANT_... retrying\n");
- libwebsocket_callback_on_writable(context, wsi);
+ lwsl_info(
+ "SSL_connect WANT_... retrying\n");
+ libwebsocket_callback_on_writable(
+ context, wsi);
return 0; /* no error */
}
* run into the connection timeout or win
*/
- lwsl_err("SSL connect error %s\n",
+ lwsl_err("SSL connect error %lu: %s\n",
+ ERR_get_error(),
ERR_error_string(ERR_get_error(),
- ssl_err_buf));
+ (char *)context->service_buffer));
return 0;
}
+ #ifndef USE_CYASSL
+ /*
+ * See comment above about CyaSSL certificate
+ * verification
+ */
+ lws_latency_pre(context, wsi);
n = SSL_get_verify_result(wsi->ssl);
+ lws_latency(context, wsi,
+ "SSL_get_verify_result LWS_CONNMODE..HANDSHAKE",
+ n, n > 0);
if ((n != X509_V_OK) && (
n != X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT ||
wsi->use_ssl != 2)) {
- lwsl_err("server's cert didn't "
- "look good %d\n", n);
+ lwsl_err(
+ "server's cert didn't look good %d\n", n);
libwebsocket_close_and_free_session(context,
wsi, LWS_CLOSE_STATUS_NOSTATUS);
return 0;
}
+#endif /* USE_CYASSL */
} else
wsi->ssl = NULL;
- #endif
+#endif
p = libwebsockets_generate_client_handshake(context, wsi, p);
if (p == NULL) {
- lwsl_err("Failed to generate handshake for client, closing it\n");
+ lwsl_err("Failed to generate handshake for client\n");
libwebsocket_close_and_free_session(context, wsi,
LWS_CLOSE_STATUS_NOSTATUS);
return 0;
/* send our request to the server */
- #ifdef LWS_OPENSSL_SUPPORT
+ lws_latency_pre(context, wsi);
+#ifdef LWS_OPENSSL_SUPPORT
if (wsi->use_ssl)
- n = SSL_write(wsi->ssl, pkt, p - pkt);
+ n = SSL_write(wsi->ssl, context->service_buffer,
+ p - (char *)context->service_buffer);
else
- #endif
- n = send(wsi->sock, pkt, p - pkt, 0);
+#endif
+ n = send(wsi->sock, context->service_buffer,
+ p - (char *)context->service_buffer, 0);
+ lws_latency(context, wsi,
+ "send or SSL_write LWS_CONNMODE...HANDSHAKE",
+ n, n >= 0);
if (n < 0) {
lwsl_debug("ERROR writing to client socket\n");
return 0;
}
- wsi->parser_state = WSI_TOKEN_NAME_PART;
- wsi->lextable_pos = 0;
+ wsi->u.hdr.parser_state = WSI_TOKEN_NAME_PART;
+ wsi->u.hdr.lextable_pos = 0;
wsi->mode = LWS_CONNMODE_WS_CLIENT_WAITING_SERVER_REPLY;
libwebsocket_set_timeout(wsi,
- PENDING_TIMEOUT_AWAITING_SERVER_RESPONSE, AWAITING_TIMEOUT);
-
+ PENDING_TIMEOUT_AWAITING_SERVER_RESPONSE,
+ AWAITING_TIMEOUT);
break;
case LWS_CONNMODE_WS_CLIENT_WAITING_SERVER_REPLY:
goto bail3;
}
+ if (!(pollfd->revents & POLLIN)) {
+ lwsl_warn("server reply no POLLIN\n");
+ goto bail3;
+ }
/* interpret the server response */
*/
len = 1;
- while (wsi->parser_state != WSI_PARSING_COMPLETE && len > 0) {
+ while (wsi->u.hdr.parser_state != WSI_PARSING_COMPLETE &&
+ len > 0) {
#ifdef LWS_OPENSSL_SUPPORT
- if (wsi->use_ssl)
+ if (wsi->use_ssl) {
len = SSL_read(wsi->ssl, &c, 1);
- else
+ if (len < 0) {
+ n = SSL_get_error(wsi->ssl, len);
+ if (n == SSL_ERROR_WANT_READ ||
+ n == SSL_ERROR_WANT_WRITE)
+ return 0;
+ }
+ } else
#endif
len = recv(wsi->sock, &c, 1, 0);
- libwebsocket_parse(wsi, c);
+ if (len < 0) {
+ lwsl_warn("error on parsing recv\n");
+ goto bail3;
+ }
+
+ if (libwebsocket_parse(wsi, c)) {
+ lwsl_warn("problems parsing header\n");
+ goto bail3;
+ }
}
/*
* not complete just wait for next packet coming in this state
*/
- if (wsi->parser_state != WSI_PARSING_COMPLETE)
+ if (wsi->u.hdr.parser_state != WSI_PARSING_COMPLETE)
break;
/*
return lws_client_interpret_server_handshake(context, wsi);
bail3:
- if (wsi->c_protocol)
- free(wsi->c_protocol);
+ lwsl_info(
+ "closing connection at LWS_CONNMODE...SERVER_REPLY\n");
libwebsocket_close_and_free_session(context, wsi,
LWS_CLOSE_STATUS_NOSTATUS);
return 0;
lws_client_interpret_server_handshake(struct libwebsocket_context *context,
struct libwebsocket *wsi)
{
- unsigned char buf[LWS_SEND_BUFFER_PRE_PADDING + 1 +
- MAX_BROADCAST_PAYLOAD + LWS_SEND_BUFFER_POST_PADDING];
- char pkt[1024];
- char *p = &pkt[0];
const char *pc;
int okay = 0;
+ char *p;
+ int len;
#ifndef LWS_NO_EXTENSIONS
char ext_name[128];
struct libwebsocket_extension *ext;
int more = 1;
const char *c;
#endif
- int len = 0;
int n;
- static const char magic_websocket_04_masking_guid[] =
- "61AC5F19-FBBA-4540-B96F-6561F1AB40A8";
-
- /*
- * 00 / 76 -->
- *
- * HTTP/1.1 101 WebSocket Protocol Handshake
- * Upgrade: WebSocket
- * Connection: Upgrade
- * Sec-WebSocket-Origin: http://127.0.0.1
- * Sec-WebSocket-Location: ws://127.0.0.1:9999/socket.io/websocket
- *
- * xxxxxxxxxxxxxxxx
- */
-
- if (wsi->ietf_spec_revision == 0) {
- if (!wsi->utf8_token[WSI_TOKEN_HTTP].token_len ||
- !wsi->utf8_token[WSI_TOKEN_UPGRADE].token_len ||
- !wsi->utf8_token[WSI_TOKEN_CHALLENGE].token_len ||
- !wsi->utf8_token[WSI_TOKEN_CONNECTION].token_len
- ) {
- lwsl_parser("libwebsocket_client_handshake "
- "missing required header(s)\n");
- pkt[len] = '\0';
- lwsl_parser("%s", pkt);
- goto bail3;
- }
-
- strtolower(wsi->utf8_token[WSI_TOKEN_HTTP].token);
- if (strncmp(wsi->utf8_token[WSI_TOKEN_HTTP].token, "101", 3)) {
- lwsl_warn("libwebsocket_client_handshake "
- "server sent bad HTTP response '%s'\n",
- wsi->utf8_token[WSI_TOKEN_HTTP].token);
- goto bail3;
- }
-
- if (wsi->utf8_token[WSI_TOKEN_CHALLENGE].token_len < 16) {
- lwsl_parser("libwebsocket_client_handshake "
- "challenge reply too short %d\n",
- wsi->utf8_token[
- WSI_TOKEN_CHALLENGE].token_len);
- pkt[len] = '\0';
- lwsl_parser("%s", pkt);
- goto bail3;
-
- }
-
- goto select_protocol;
- }
/*
* well, what the server sent looked reasonable for syntax.
* Now let's confirm it sent all the necessary headers
*/
-#if 0
- lwsl_parser("WSI_TOKEN_HTTP: %d\n",
- wsi->utf8_token[WSI_TOKEN_HTTP].token_len);
- lwsl_parser("WSI_TOKEN_UPGRADE: %d\n",
- wsi->utf8_token[WSI_TOKEN_UPGRADE].token_len);
- lwsl_parser("WSI_TOKEN_CONNECTION: %d\n",
- wsi->utf8_token[WSI_TOKEN_CONNECTION].token_len);
- lwsl_parser("WSI_TOKEN_ACCEPT: %d\n",
- wsi->utf8_token[WSI_TOKEN_ACCEPT].token_len);
- lwsl_parser("WSI_TOKEN_NONCE: %d\n",
- wsi->utf8_token[WSI_TOKEN_NONCE].token_len);
- lwsl_parser("WSI_TOKEN_PROTOCOL: %d\n",
- wsi->utf8_token[WSI_TOKEN_PROTOCOL].token_len);
-#endif
- if (!wsi->utf8_token[WSI_TOKEN_HTTP].token_len ||
- !wsi->utf8_token[WSI_TOKEN_UPGRADE].token_len ||
- !wsi->utf8_token[WSI_TOKEN_CONNECTION].token_len ||
- !wsi->utf8_token[WSI_TOKEN_ACCEPT].token_len ||
- (!wsi->utf8_token[WSI_TOKEN_NONCE].token_len &&
- wsi->ietf_spec_revision == 4)
- ) {
- lwsl_parser("libwebsocket_client_handshake "
- "missing required header(s) revision=%d\n", wsi->ietf_spec_revision);
- pkt[len] = '\0';
- lwsl_parser("%s", pkt);
+
+ if (lws_hdr_total_length(wsi, WSI_TOKEN_ACCEPT) == 0) {
+ lwsl_info("no ACCEPT\n");
goto bail3;
}
- /*
- * Everything seems to be there, now take a closer look at what
- * is in each header
- */
-
- strtolower(wsi->utf8_token[WSI_TOKEN_HTTP].token);
- if (strncmp(wsi->utf8_token[WSI_TOKEN_HTTP].token, "101", 3)) {
- lwsl_warn("libwebsocket_client_handshake "
- "server sent bad HTTP response '%s'\n",
- wsi->utf8_token[WSI_TOKEN_HTTP].token);
+ p = lws_hdr_simple_ptr(wsi, WSI_TOKEN_HTTP);
+ if (!p) {
+ lwsl_info("no URI\n");
+ goto bail3;
+ }
+ if (p && strncmp(p, "101", 3)) {
+ lwsl_warn(
+ "lws_client_handshake: got bad HTTP response '%s'\n", p);
goto bail3;
}
- strtolower(wsi->utf8_token[WSI_TOKEN_UPGRADE].token);
- if (strcmp(wsi->utf8_token[WSI_TOKEN_UPGRADE].token,
- "websocket")) {
- lwsl_warn("libwebsocket_client_handshake server "
- "sent bad Upgrade header '%s'\n",
- wsi->utf8_token[WSI_TOKEN_UPGRADE].token);
+ p = lws_hdr_simple_ptr(wsi, WSI_TOKEN_UPGRADE);
+ if (!p) {
+ lwsl_info("no UPGRADE\n");
+ goto bail3;
+ }
+ strtolower(p);
+ if (strcmp(p, "websocket")) {
+ lwsl_warn(
+ "lws_client_handshake: got bad Upgrade header '%s'\n", p);
goto bail3;
}
- strtolower(wsi->utf8_token[WSI_TOKEN_CONNECTION].token);
- if (strcmp(wsi->utf8_token[WSI_TOKEN_CONNECTION].token,
- "upgrade")) {
- lwsl_warn("libwebsocket_client_handshake server "
- "sent bad Connection hdr '%s'\n",
- wsi->utf8_token[WSI_TOKEN_CONNECTION].token);
+ p = lws_hdr_simple_ptr(wsi, WSI_TOKEN_CONNECTION);
+ if (!p) {
+ lwsl_info("no Connection hdr\n");
+ goto bail3;
+ }
+ strtolower(p);
+ if (strcmp(p, "upgrade")) {
+ lwsl_warn("lws_client_int_s_hs: bad header %s\n", p);
goto bail3;
}
-select_protocol:
- pc = wsi->c_protocol;
+ pc = lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_SENT_PROTOCOLS);
if (pc == NULL)
- lwsl_parser("lws_client_interpret_server_handshake: "
- "NULL c_protocol\n");
+ lwsl_parser("lws_client_int_s_hs: no protocol list\n");
else
- lwsl_parser("lws_client_interpret_server_handshake: "
- "cPprotocol='%s'\n", pc);
+ lwsl_parser("lws_client_int_s_hs: protocol list '%s'\n", pc);
/*
* confirm the protocol the server wants to talk was in the list
* of protocols we offered
*/
- if (!wsi->utf8_token[WSI_TOKEN_PROTOCOL].token_len) {
+ len = lws_hdr_total_length(wsi, WSI_TOKEN_PROTOCOL);
+ if (!len) {
- lwsl_info("lws_client_interpret_server_handshake "
- "WSI_TOKEN_PROTOCOL is null\n");
+ lwsl_info("lws_client_int_s_hs: WSI_TOKEN_PROTOCOL is null\n");
/*
* no protocol name to work from,
* default to first protocol
*/
wsi->protocol = &context->protocols[0];
- wsi->c_callback = wsi->protocol->callback;
- free(wsi->c_protocol);
-
goto check_extensions;
}
+ p = lws_hdr_simple_ptr(wsi, WSI_TOKEN_PROTOCOL);
+ len = strlen(p);
+
while (*pc && !okay) {
- if ((!strncmp(pc, wsi->utf8_token[WSI_TOKEN_PROTOCOL].token,
- wsi->utf8_token[WSI_TOKEN_PROTOCOL].token_len)) &&
- (pc[wsi->utf8_token[WSI_TOKEN_PROTOCOL].token_len] == ',' ||
- pc[wsi->utf8_token[WSI_TOKEN_PROTOCOL].token_len] == '\0')) {
+ if (!strncmp(pc, p, len) &&
+ (pc[len] == ',' || pc[len] == '\0')) {
okay = 1;
continue;
}
pc++;
}
- /* done with him now */
-
- if (wsi->c_protocol)
- free(wsi->c_protocol);
-
if (!okay) {
- lwsl_err("libwebsocket_client_handshake server "
- "sent bad protocol '%s'\n",
- wsi->utf8_token[WSI_TOKEN_PROTOCOL].token);
+ lwsl_err("lws_client_int_s_hs: got bad protocol %s\n", p);
goto bail2;
}
*/
n = 0;
wsi->protocol = NULL;
- while (context->protocols[n].callback && !wsi->protocol) { /* Stop after finding first one?? */
- if (strcmp(wsi->utf8_token[WSI_TOKEN_PROTOCOL].token,
- context->protocols[n].name) == 0) {
+ while (context->protocols[n].callback && !wsi->protocol) {
+ if (strcmp(p, context->protocols[n].name) == 0) {
wsi->protocol = &context->protocols[n];
- wsi->c_callback = wsi->protocol->callback;
+ break;
}
n++;
}
if (wsi->protocol == NULL) {
- lwsl_err("libwebsocket_client_handshake server "
- "requested protocol '%s', which we "
- "said we supported but we don't!\n",
- wsi->utf8_token[WSI_TOKEN_PROTOCOL].token);
+ lwsl_err("lws_client_int_s_hs: fail protocol %s\n", p);
goto bail2;
}
#ifndef LWS_NO_EXTENSIONS
/* instantiate the accepted extensions */
- if (!wsi->utf8_token[WSI_TOKEN_EXTENSIONS].token_len) {
+ if (!lws_hdr_total_length(wsi, WSI_TOKEN_EXTENSIONS)) {
lwsl_ext("no client extenstions allowed by server\n");
goto check_accept;
}
* and go through matching them or identifying bogons
*/
- c = wsi->utf8_token[WSI_TOKEN_EXTENSIONS].token;
+ if (lws_hdr_copy(wsi, (char *)context->service_buffer,
+ sizeof(context->service_buffer), WSI_TOKEN_EXTENSIONS) < 0) {
+ lwsl_warn("ext list from server failed to copy\n");
+ goto bail2;
+ }
+
+ c = (char *)context->service_buffer;
n = 0;
while (more) {
}
if (n == 0) {
- lwsl_warn("Server said we should use"
- "an unknown extension '%s'!\n", ext_name);
+ lwsl_warn("Unknown ext '%s'!\n", ext_name);
goto bail2;
}
check_accept:
#endif
- if (wsi->ietf_spec_revision == 0) {
-
- if (memcmp(wsi->initial_handshake_hash_base64,
- wsi->utf8_token[WSI_TOKEN_CHALLENGE].token, 16)) {
- lwsl_warn("libwebsocket_client_handshake "
- "failed 00 challenge compare\n");
- pkt[len] = '\0';
- lwsl_warn("%s", pkt);
- goto bail2;
- }
-
- goto accept_ok;
- }
-
/*
* Confirm his accept token is the one we precomputed
*/
- if (strcmp(wsi->utf8_token[WSI_TOKEN_ACCEPT].token,
- wsi->initial_handshake_hash_base64)) {
- lwsl_warn("libwebsocket_client_handshake server "
- "sent bad ACCEPT '%s' vs computed '%s'\n",
- wsi->utf8_token[WSI_TOKEN_ACCEPT].token,
- wsi->initial_handshake_hash_base64);
+ p = lws_hdr_simple_ptr(wsi, WSI_TOKEN_ACCEPT);
+ if (strcmp(p, wsi->u.hdr.ah->initial_handshake_hash_base64)) {
+ lwsl_warn("lws_client_int_s_hs: accept %s wrong vs %s\n", p,
+ wsi->u.hdr.ah->initial_handshake_hash_base64);
goto bail2;
}
- if (wsi->ietf_spec_revision == 4) {
- /*
- * Calculate the 04 masking key to use when
- * sending data to server
- */
-
- strcpy((char *)buf, wsi->key_b64);
- p = (char *)buf + strlen(wsi->key_b64);
- strcpy(p, wsi->utf8_token[WSI_TOKEN_NONCE].token);
- p += wsi->utf8_token[WSI_TOKEN_NONCE].token_len;
- strcpy(p, magic_websocket_04_masking_guid);
- SHA1(buf, strlen((char *)buf), wsi->masking_key_04);
- }
-accept_ok:
-
/* allocate the per-connection user memory (if any) */
- if (wsi->protocol->per_session_data_size &&
- !libwebsocket_ensure_user_space(wsi))
+ if (libwebsocket_ensure_user_space(wsi)) {
+ lwsl_err("Problem allocating wsi user mem\n");
goto bail2;
+ }
+
+ /*
+ * we seem to be good to go, give client last chance to check
+ * headers and OK it
+ */
+
+ wsi->protocol->callback(context, wsi,
+ LWS_CALLBACK_CLIENT_FILTER_PRE_ESTABLISH,
+ wsi->user_space, NULL, 0);
/* clear his proxy connection timeout */
libwebsocket_set_timeout(wsi, NO_PENDING_TIMEOUT, 0);
+ /* free up his parsing allocations */
+ if (wsi->u.hdr.ah)
+ free(wsi->u.hdr.ah);
+
/* mark him as being alive */
wsi->state = WSI_STATE_ESTABLISHED;
wsi->mode = LWS_CONNMODE_WS_CLIENT;
+ /* union transition */
+
+ memset(&wsi->u, 0, sizeof(wsi->u));
+
+ /*
+ * create the frame buffer for this connection according to the
+ * size mentioned in the protocol definition. If 0 there, then
+ * use a big default for compatibility
+ */
+
+ n = wsi->protocol->rx_buffer_size;
+ if (!n)
+ n = LWS_MAX_SOCKET_IO_BUF;
+ n += LWS_SEND_BUFFER_PRE_PADDING + LWS_SEND_BUFFER_POST_PADDING;
+ wsi->u.ws.rx_user_buffer = malloc(n);
+ if (!wsi->u.ws.rx_user_buffer) {
+ lwsl_err("Out of Mem allocating rx buffer %d\n", n);
+ goto bail3;
+ }
+ lwsl_info("Allocating client RX buffer %d\n", n);
+
lwsl_debug("handshake OK for protocol %s\n", wsi->protocol->name);
/* call him back to inform him he is up */
return 0;
bail3:
- if (wsi->c_protocol)
- free(wsi->c_protocol);
bail2:
- if (wsi->c_callback) wsi->c_callback(context, wsi,
- LWS_CALLBACK_CLIENT_CONNECTION_ERROR,
- wsi->user_space,
- NULL, 0);
- libwebsocket_close_and_free_session(context, wsi,
- LWS_CLOSE_STATUS_NOSTATUS); // But this should be LWS_CLOSE_STATUS_PROTOCOL_ERR
+ if (wsi->protocol)
+ wsi->protocol->callback(context, wsi,
+ LWS_CALLBACK_CLIENT_CONNECTION_ERROR,
+ wsi->user_space, NULL, 0);
- return 1;
-}
+ lwsl_info("closing connection due to bail2 connection error\n");
-void libwebsockets_00_spaceout(char *key, int spaces, int seed)
-{
- char *p;
+ /* free up his parsing allocations */
- key++;
- while (spaces--) {
- if (*key && (seed & 1))
- key++;
- seed >>= 1;
-
- p = key + strlen(key);
- while (p >= key) {
- p[1] = p[0];
- p--;
- }
- *key++ = ' ';
- }
-}
+ if (wsi->u.hdr.ah)
+ free(wsi->u.hdr.ah);
-void libwebsockets_00_spam(char *key, int count, int seed)
-{
- char *p;
-
- key++;
- while (count--) {
-
- if (*key && (seed & 1))
- key++;
- seed >>= 1;
+ libwebsocket_close_and_free_session(context, wsi,
+ LWS_CLOSE_STATUS_PROTOCOL_ERR);
- p = key + strlen(key);
- while (p >= key) {
- p[1] = p[0];
- p--;
- }
- *key++ = 0x21 + ((seed & 0xffff) % 15);
- /* 4 would use it up too fast.. not like it matters */
- seed >>= 1;
- }
+ return 1;
}
+
char *
libwebsockets_generate_client_handshake(struct libwebsocket_context *context,
struct libwebsocket *wsi, char *pkt)
{
+ char buf[128];
char hash[20];
+ char key_b64[40];
char *p = pkt;
int n;
#ifndef LWS_NO_EXTENSIONS
struct libwebsocket_extension *ext1;
int ext_count = 0;
#endif
- unsigned char buf[LWS_SEND_BUFFER_PRE_PADDING + 1 +
- MAX_BROADCAST_PAYLOAD + LWS_SEND_BUFFER_POST_PADDING];
- static const char magic_websocket_guid[] =
- "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
/*
* create the random key
if (n != 16) {
lwsl_err("Unable to read from random dev %s\n",
SYSTEM_RANDOM_FILEPATH);
- free(wsi->c_path);
- free(wsi->c_host);
- if (wsi->c_origin)
- free(wsi->c_origin);
- if (wsi->c_protocol)
- free(wsi->c_protocol);
libwebsocket_close_and_free_session(context, wsi,
LWS_CLOSE_STATUS_NOSTATUS);
return NULL;
}
- lws_b64_encode_string(hash, 16, wsi->key_b64,
- sizeof wsi->key_b64);
+ lws_b64_encode_string(hash, 16, key_b64, sizeof(key_b64));
/*
* 00 example client handshake
* Sec-WebSocket-Version: 4
*/
- p += sprintf(p, "GET %s HTTP/1.1\x0d\x0a", wsi->c_path);
-
- p += sprintf(p, "Pragma: no-cache\x0d\x0a"
- "Cache-Control: no-cache\x0d\x0a");
-
- if (wsi->ietf_spec_revision == 0) {
- unsigned char spaces_1, spaces_2;
- unsigned int max_1, max_2;
- unsigned int num_1, num_2;
- unsigned long product_1, product_2;
- char key_1[40];
- char key_2[40];
- unsigned int seed;
- unsigned int count;
- char challenge[16];
-
- libwebsockets_get_random(context, &spaces_1, sizeof(char));
- libwebsockets_get_random(context, &spaces_2, sizeof(char));
-
- spaces_1 = (spaces_1 % 12) + 1;
- spaces_2 = (spaces_2 % 12) + 1;
-
- max_1 = 4294967295 / spaces_1;
- max_2 = 4294967295 / spaces_2;
-
- libwebsockets_get_random(context, &num_1, sizeof(int));
- libwebsockets_get_random(context, &num_2, sizeof(int));
-
- num_1 = (num_1 % max_1);
- num_2 = (num_2 % max_2);
-
- challenge[0] = num_1 >> 24;
- challenge[1] = num_1 >> 16;
- challenge[2] = num_1 >> 8;
- challenge[3] = num_1;
- challenge[4] = num_2 >> 24;
- challenge[5] = num_2 >> 16;
- challenge[6] = num_2 >> 8;
- challenge[7] = num_2;
-
- product_1 = num_1 * spaces_1;
- product_2 = num_2 * spaces_2;
-
- sprintf(key_1, "%lu", product_1);
- sprintf(key_2, "%lu", product_2);
-
- libwebsockets_get_random(context, &seed, sizeof(int));
- libwebsockets_get_random(context, &count, sizeof(int));
-
- libwebsockets_00_spam(key_1, (count % 12) + 1, seed);
-
- libwebsockets_get_random(context, &seed, sizeof(int));
- libwebsockets_get_random(context, &count, sizeof(int));
-
- libwebsockets_00_spam(key_2, (count % 12) + 1, seed);
-
- libwebsockets_get_random(context, &seed, sizeof(int));
-
- libwebsockets_00_spaceout(key_1, spaces_1, seed);
- libwebsockets_00_spaceout(key_2, spaces_2, seed >> 16);
+ p += sprintf(p, "GET %s HTTP/1.1\x0d\x0a",
+ lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_URI));
- p += sprintf(p, "Upgrade: WebSocket\x0d\x0a"
- "Connection: Upgrade\x0d\x0aHost: %s\x0d\x0a",
- wsi->c_host);
- if (wsi->c_origin)
- p += sprintf(p, "Origin: %s\x0d\x0a", wsi->c_origin);
+ p += sprintf(p,
+ "Pragma: no-cache\x0d\x0a""Cache-Control: no-cache\x0d\x0a");
- if (wsi->c_protocol)
- p += sprintf(p, "Sec-WebSocket-Protocol: %s"
- "\x0d\x0a", wsi->c_protocol);
-
- p += sprintf(p, "Sec-WebSocket-Key1: %s\x0d\x0a", key_1);
- p += sprintf(p, "Sec-WebSocket-Key2: %s\x0d\x0a", key_2);
-
- /* give userland a chance to append, eg, cookies */
-
- context->protocols[0].callback(context, wsi,
- LWS_CALLBACK_CLIENT_APPEND_HANDSHAKE_HEADER,
- NULL, &p, (pkt + sizeof(pkt)) - p - 12);
-
- p += sprintf(p, "\x0d\x0a");
-
- if (libwebsockets_get_random(context, p, 8) != 8)
- return NULL;
- memcpy(&challenge[8], p, 8);
- p += 8;
-
- /* precompute what we want to see from the server */
-
- MD5((unsigned char *)challenge, 16,
- (unsigned char *)wsi->initial_handshake_hash_base64);
-
- goto issue_hdr;
- }
-
- p += sprintf(p, "Host: %s\x0d\x0a", wsi->c_host);
- p += sprintf(p, "Upgrade: websocket\x0d\x0a"
- "Connection: Upgrade\x0d\x0a"
- "Sec-WebSocket-Key: ");
- strcpy(p, wsi->key_b64);
- p += strlen(wsi->key_b64);
+ p += sprintf(p, "Host: %s\x0d\x0a",
+ lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_HOST));
+ p += sprintf(p,
+"Upgrade: websocket\x0d\x0a""Connection: Upgrade\x0d\x0a""Sec-WebSocket-Key: ");
+ strcpy(p, key_b64);
+ p += strlen(key_b64);
p += sprintf(p, "\x0d\x0a");
- if (wsi->c_origin) {
- if (wsi->ietf_spec_revision == 13) {
- p += sprintf(p, "Origin: %s\x0d\x0a",
- wsi->c_origin);
- }
- else {
- p += sprintf(p, "Sec-WebSocket-Origin: %s\x0d\x0a",
- wsi->c_origin);
- }
- }
- if (wsi->c_protocol)
+ if (lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_ORIGIN))
+ p += sprintf(p, "Origin: %s\x0d\x0a",
+ lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_ORIGIN));
+
+ if (lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_SENT_PROTOCOLS))
p += sprintf(p, "Sec-WebSocket-Protocol: %s\x0d\x0a",
- wsi->c_protocol);
+ lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_SENT_PROTOCOLS));
/* tell the server what extensions we could support */
context->protocols[0].callback(context, wsi,
LWS_CALLBACK_CLIENT_APPEND_HANDSHAKE_HEADER,
- NULL, &p, (pkt + sizeof(pkt)) - p - 12);
+ NULL, &p, (pkt + sizeof(context->service_buffer)) - p - 12);
p += sprintf(p, "\x0d\x0a");
/* prepare the expected server accept response */
- strcpy((char *)buf, wsi->key_b64);
- strcpy((char *)&buf[strlen((char *)buf)], magic_websocket_guid);
+ key_b64[39] = '\0'; /* enforce composed length below buf sizeof */
+ n = sprintf(buf, "%s258EAFA5-E914-47DA-95CA-C5AB0DC85B11", key_b64);
- SHA1(buf, strlen((char *)buf), (unsigned char *)hash);
+ SHA1((unsigned char *)buf, n, (unsigned char *)hash);
lws_b64_encode_string(hash, 20,
- wsi->initial_handshake_hash_base64,
- sizeof wsi->initial_handshake_hash_base64);
-
-issue_hdr:
-
-#if 0
- puts(pkt);
-#endif
-
- /* done with these now */
-
- free(wsi->c_path);
- free(wsi->c_host);
- if (wsi->c_origin)
- free(wsi->c_origin);
+ wsi->u.hdr.ah->initial_handshake_hash_base64,
+ sizeof(wsi->u.hdr.ah->initial_handshake_hash_base64));
return p;
}
projects / profile / ivi / libwebsockets.git / blobdiff