#include "private-libwebsockets.h"
+#ifdef WIN32
+
+#else
+#include <ifaddrs.h>
+#include <sys/un.h>
+#endif
+
+#ifdef LWS_OPENSSL_SUPPORT
+int openssl_websocket_private_data_index;
+#endif
+
+/*
+ * In-place str to lower case
+ */
+
+static void
+strtolower(char *s)
+{
+ while (*s) {
+ *s = tolower(*s);
+ s++;
+ }
+}
+
/* file descriptor hash management */
struct libwebsocket *
-wsi_from_fd(struct libwebsocket_context *this, int fd)
+wsi_from_fd(struct libwebsocket_context *context, int fd)
{
int h = LWS_FD_HASH(fd);
int n = 0;
- for (n = 0; n < this->fd_hashtable[h].length; n++)
- if (this->fd_hashtable[h].wsi[n]->sock == fd)
- return this->fd_hashtable[h].wsi[n];
+ for (n = 0; n < context->fd_hashtable[h].length; n++)
+ if (context->fd_hashtable[h].wsi[n]->sock == fd)
+ return context->fd_hashtable[h].wsi[n];
return NULL;
}
int
-insert_wsi(struct libwebsocket_context *this, struct libwebsocket *wsi)
+insert_wsi(struct libwebsocket_context *context, struct libwebsocket *wsi)
{
int h = LWS_FD_HASH(wsi->sock);
- if (this->fd_hashtable[h].length == MAX_CLIENTS - 1) {
+ if (context->fd_hashtable[h].length == MAX_CLIENTS - 1) {
fprintf(stderr, "hash table overflow\n");
return 1;
}
- this->fd_hashtable[h].wsi[this->fd_hashtable[h].length++] = wsi;
+ context->fd_hashtable[h].wsi[context->fd_hashtable[h].length++] = wsi;
return 0;
}
int
-delete_from_fd(struct libwebsocket_context *this, int fd)
+delete_from_fd(struct libwebsocket_context *context, int fd)
{
int h = LWS_FD_HASH(fd);
int n = 0;
- for (n = 0; n < this->fd_hashtable[h].length; n++)
- if (this->fd_hashtable[h].wsi[n]->sock == fd) {
- while (n < this->fd_hashtable[h].length) {
- this->fd_hashtable[h].wsi[n] =
- this->fd_hashtable[h].wsi[n + 1];
+ for (n = 0; n < context->fd_hashtable[h].length; n++)
+ if (context->fd_hashtable[h].wsi[n]->sock == fd) {
+ while (n < context->fd_hashtable[h].length) {
+ context->fd_hashtable[h].wsi[n] =
+ context->fd_hashtable[h].wsi[n + 1];
n++;
}
- this->fd_hashtable[h].length--;
+ context->fd_hashtable[h].length--;
return 0;
}
return 1;
}
+#ifdef LWS_OPENSSL_SUPPORT
+static void
+libwebsockets_decode_ssl_error(void)
+{
+ char buf[256];
+ u_long err;
+
+ while ((err = ERR_get_error()) != 0) {
+ ERR_error_string_n(err, buf, sizeof(buf));
+ fprintf(stderr, "*** %s\n", buf);
+ }
+}
+#endif
+
+
+static int
+interface_to_sa(const char* ifname, struct sockaddr_in *addr, size_t addrlen)
+{
+ int rc = -1;
+#ifdef WIN32
+ // TODO
+#else
+ struct ifaddrs *ifr;
+ struct ifaddrs *ifc;
+ struct sockaddr_in *sin;
+
+ getifaddrs(&ifr);
+ for (ifc = ifr; ifc != NULL; ifc = ifc->ifa_next) {
+ if (strcmp(ifc->ifa_name, ifname))
+ continue;
+ if (ifc->ifa_addr == NULL)
+ continue;
+ sin = (struct sockaddr_in *)ifc->ifa_addr;
+ if (sin->sin_family != AF_INET)
+ continue;
+ memcpy(addr, sin, addrlen);
+ rc = 0;
+ }
+
+ freeifaddrs(ifr);
+#endif
+ return rc;
+}
void
-libwebsocket_close_and_free_session(struct libwebsocket *wsi)
+libwebsocket_close_and_free_session(struct libwebsocket_context *context,
+ struct libwebsocket *wsi, enum lws_close_status reason)
{
int n;
+ int old_state;
unsigned char buf[LWS_SEND_BUFFER_PRE_PADDING + 2 +
LWS_SEND_BUFFER_POST_PADDING];
+ int ret;
+ int m;
+ struct lws_tokens eff_buf;
+ struct libwebsocket_extension *ext;
- if ((unsigned long)wsi < LWS_MAX_PROTOCOLS)
+ if (!wsi)
return;
- n = wsi->state;
+ old_state = wsi->state;
- if (n == WSI_STATE_DEAD_SOCKET)
+ if (old_state == WSI_STATE_DEAD_SOCKET)
return;
+ wsi->close_reason = reason;
+
+ /*
+ * are his extensions okay with him closing? Eg he might be a mux
+ * parent and just his ch1 aspect is closing?
+ */
+
+
+ for (n = 0; n < wsi->count_active_extensions; n++) {
+ if (!wsi->active_extensions[n]->callback)
+ continue;
+
+ m = wsi->active_extensions[n]->callback(context,
+ wsi->active_extensions[n], wsi,
+ LWS_EXT_CALLBACK_CHECK_OK_TO_REALLY_CLOSE,
+ wsi->active_extensions_user[n], NULL, 0);
+
+ /*
+ * if somebody vetoed actually closing him at this time....
+ * up to the extension to track the attempted close, let's
+ * just bail
+ */
+
+ if (m) {
+ debug("extension vetoed close\n");
+ return;
+ }
+ }
+
+
+
+ /*
+ * flush any tx pending from extensions, since we may send close packet
+ * if there are problems with send, just nuke the connection
+ */
+
+ ret = 1;
+ while (ret == 1) {
+
+ /* default to nobody has more to spill */
+
+ ret = 0;
+ eff_buf.token = NULL;
+ eff_buf.token_len = 0;
+
+ /* show every extension the new incoming data */
+
+ for (n = 0; n < wsi->count_active_extensions; n++) {
+ m = wsi->active_extensions[n]->callback(
+ wsi->protocol->owning_server,
+ wsi->active_extensions[n], wsi,
+ LWS_EXT_CALLBACK_FLUSH_PENDING_TX,
+ wsi->active_extensions_user[n], &eff_buf, 0);
+ if (m < 0) {
+ fprintf(stderr, "Extension reports "
+ "fatal error\n");
+ goto just_kill_connection;
+ }
+ if (m)
+ /*
+ * at least one extension told us he has more
+ * to spill, so we will go around again after
+ */
+ ret = 1;
+ }
+
+ /* assuming they left us something to send, send it */
+
+ if (eff_buf.token_len)
+ if (lws_issue_raw(wsi, (unsigned char *)eff_buf.token,
+ eff_buf.token_len))
+ goto just_kill_connection;
+ }
+
/*
* signal we are closing, libsocket_write will
* add any necessary version-specific stuff. If the write fails,
* no worries we are closing anyway. If we didn't initiate this
* close, then our state has been changed to
- * WSI_STATE_RETURNED_CLOSE_ALREADY and we can skip this
+ * WSI_STATE_RETURNED_CLOSE_ALREADY and we will skip this.
+ *
+ * Likewise if it's a second call to close this connection after we
+ * sent the close indication to the peer already, we are in state
+ * WSI_STATE_AWAITING_CLOSE_ACK and will skip doing this a second time.
+ */
+
+ if (old_state == WSI_STATE_ESTABLISHED &&
+ reason != LWS_CLOSE_STATUS_NOSTATUS) {
+
+ debug("sending close indication...\n");
+
+ n = libwebsocket_write(wsi, &buf[LWS_SEND_BUFFER_PRE_PADDING],
+ 0, LWS_WRITE_CLOSE);
+ if (!n) {
+ /*
+ * we have sent a nice protocol level indication we
+ * now wish to close, we should not send anything more
+ */
+
+ wsi->state = WSI_STATE_AWAITING_CLOSE_ACK;
+
+ /* and we should wait for a reply for a bit */
+
+ libwebsocket_set_timeout(wsi,
+ PENDING_TIMEOUT_CLOSE_ACK, 5);
+
+ debug("sent close indication, awaiting ack\n");
+
+ return;
+ }
+
+ /* else, the send failed and we should just hang up */
+ }
+
+just_kill_connection:
+
+ debug("libwebsocket_close_and_free_session: just_kill_connection\n");
+
+ /*
+ * we won't be servicing or receiving anything further from this guy
+ * remove this fd from wsi mapping hashtable
*/
- if (n == WSI_STATE_ESTABLISHED)
- libwebsocket_write(wsi, &buf[LWS_SEND_BUFFER_PRE_PADDING], 0,
- LWS_WRITE_CLOSE);
+ if (wsi->sock)
+ delete_from_fd(context, wsi->sock);
+
+ /* delete it from the internal poll list if still present */
+
+ for (n = 0; n < context->fds_count; n++) {
+ if (context->fds[n].fd != wsi->sock)
+ continue;
+ while (n < context->fds_count - 1) {
+ context->fds[n] = context->fds[n + 1];
+ n++;
+ }
+ context->fds_count--;
+ /* we only have to deal with one */
+ n = context->fds_count;
+ }
+
+ /* remove also from external POLL support via protocol 0 */
+ if (wsi->sock)
+ context->protocols[0].callback(context, wsi,
+ LWS_CALLBACK_DEL_POLL_FD, (void *)(long)wsi->sock, NULL, 0);
wsi->state = WSI_STATE_DEAD_SOCKET;
- if (wsi->protocol->callback && n == WSI_STATE_ESTABLISHED)
- wsi->protocol->callback(wsi, LWS_CALLBACK_CLOSED,
+ /* tell the user it's all over for this guy */
+
+ if (wsi->protocol && wsi->protocol->callback &&
+ ((old_state == WSI_STATE_ESTABLISHED) ||
+ (old_state == WSI_STATE_RETURNED_CLOSE_ALREADY) ||
+ (old_state == WSI_STATE_AWAITING_CLOSE_ACK))) {
+ debug("calling back CLOSED\n");
+ wsi->protocol->callback(context, wsi, LWS_CALLBACK_CLOSED,
wsi->user_space, NULL, 0);
+ } else
+ debug("not calling back closed due to old_state=%d\n",
+ old_state);
+
+
+ /* deallocate any active extension contexts */
+
+ for (n = 0; n < wsi->count_active_extensions; n++) {
+ if (!wsi->active_extensions[n]->callback)
+ continue;
+
+ wsi->active_extensions[n]->callback(context,
+ wsi->active_extensions[n], wsi,
+ LWS_EXT_CALLBACK_DESTROY,
+ wsi->active_extensions_user[n], NULL, 0);
+
+ free(wsi->active_extensions_user[n]);
+ }
+
+ /*
+ * inform all extensions in case they tracked this guy out of band
+ * even though not active on him specifically
+ */
+
+ ext = context->extensions;
+ while (ext && ext->callback) {
+ ext->callback(context, ext, wsi,
+ LWS_EXT_CALLBACK_DESTROY_ANY_WSI_CLOSING,
+ NULL, NULL, 0);
+ ext++;
+ }
+
+ /* free up his parsing allocations */
for (n = 0; n < WSI_TOKEN_COUNT; n++)
if (wsi->utf8_token[n].token)
free(wsi->utf8_token[n].token);
+ if (wsi->c_address)
+ free(wsi->c_address);
+
/* fprintf(stderr, "closing fd=%d\n", wsi->sock); */
#ifdef LWS_OPENSSL_SUPPORT
if (wsi->ssl) {
n = SSL_get_fd(wsi->ssl);
SSL_shutdown(wsi->ssl);
+#ifdef WIN32
+ closesocket(n);
+#else
close(n);
+#endif
SSL_free(wsi->ssl);
} else {
#endif
shutdown(wsi->sock, SHUT_RDWR);
- close(wsi->sock);
+#ifdef WIN32
+ if (wsi->sock)
+ closesocket(wsi->sock);
+#else
+ if (wsi->sock)
+ close(wsi->sock);
+#endif
#ifdef LWS_OPENSSL_SUPPORT
}
#endif
/**
* libwebsockets_hangup_on_client() - Server calls to terminate client
* connection
- * @this: libwebsockets context
+ * @context: libwebsockets context
* @fd: Connection socket descriptor
*/
void
-libwebsockets_hangup_on_client(struct libwebsocket_context *this, int fd)
+libwebsockets_hangup_on_client(struct libwebsocket_context *context, int fd)
{
- struct libwebsocket *wsi = wsi_from_fd(this, fd);
+ struct libwebsocket *wsi = wsi_from_fd(context, fd);
if (wsi == NULL)
return;
- libwebsocket_close_and_free_session(wsi);
+ libwebsocket_close_and_free_session(context, wsi,
+ LWS_CLOSE_STATUS_NOSTATUS);
}
struct hostent *host;
struct hostent *host1;
char ip[128];
- char *p;
+ unsigned char *p;
int n;
+ struct sockaddr_un *un;
rip[0] = '\0';
name[0] = '\0';
host1 = gethostbyname(host->h_name);
if (host1 == NULL)
return;
- p = (char *)host1;
+ p = (unsigned char *)host1;
n = 0;
while (p != NULL) {
- p = host1->h_addr_list[n++];
+ p = (unsigned char *)host1->h_addr_list[n++];
if (p == NULL)
continue;
- if (host1->h_addrtype != AF_INET)
+ if ((host1->h_addrtype != AF_INET)
+#ifdef AF_LOCAL
+ && (host1->h_addrtype != AF_LOCAL)
+#endif
+ )
continue;
- sprintf(ip, "%d.%d.%d.%d",
- p[0], p[1], p[2], p[3]);
+ if (host1->h_addrtype == AF_INET)
+ sprintf(ip, "%u.%u.%u.%u", p[0], p[1], p[2], p[3]);
+#ifdef AF_LOCAL
+ else {
+ un = (struct sockaddr_un *)p;
+ strncpy(ip, un->sun_path, sizeof(ip) -1);
+ ip[sizeof(ip) - 1] = '\0';
+ }
+#endif
p = NULL;
strncpy(rip, ip, rip_len);
rip[rip_len - 1] = '\0';
}
}
+int libwebsockets_get_random(struct libwebsocket_context *context,
+ void *buf, int len)
+{
+ int n;
+ char *p = buf;
+
+#ifdef WIN32
+ for (n = 0; n < len; n++)
+ p[n] = (unsigned char)rand();
+#else
+ n = read(context->fd_random, p, len);
+#endif
+
+ return n;
+}
+
+unsigned char *
+libwebsockets_SHA1(const unsigned char *d, size_t n, unsigned char *md)
+{
+ return SHA1(d, n, md);
+}
+
+void libwebsockets_00_spaceout(char *key, int spaces, int seed)
+{
+ char *p;
+
+ key++;
+ while (spaces--) {
+ if (*key && (seed & 1))
+ key++;
+ seed >>= 1;
+
+ p = key + strlen(key);
+ while (p >= key) {
+ p[1] = p[0];
+ p--;
+ }
+ *key++ = ' ';
+ }
+}
+
+void libwebsockets_00_spam(char *key, int count, int seed)
+{
+ char *p;
+
+ key++;
+ while (count--) {
+
+ if (*key && (seed & 1))
+ key++;
+ seed >>= 1;
+
+ 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;
+ }
+}
+
+int lws_send_pipe_choked(struct libwebsocket *wsi)
+{
+ struct pollfd fds;
+
+ fds.fd = wsi->sock;
+ fds.events = POLLOUT;
+ fds.revents = 0;
+
+ if (poll(&fds, 1, 0) != 1)
+ return 1;
+
+ if ((fds.revents & POLLOUT) == 0)
+ return 1;
+
+ /* okay to send another packet without blocking */
+
+ return 0;
+}
+
+int
+lws_handle_POLLOUT_event(struct libwebsocket_context *context,
+ struct libwebsocket *wsi, struct pollfd *pollfd)
+{
+ struct lws_tokens eff_buf;
+ int n;
+ int ret;
+ int m;
+ int handled = 0;
+
+ for (n = 0; n < wsi->count_active_extensions; n++) {
+ if (!wsi->active_extensions[n]->callback)
+ continue;
+
+ m = wsi->active_extensions[n]->callback(context,
+ wsi->active_extensions[n], wsi,
+ LWS_EXT_CALLBACK_IS_WRITEABLE,
+ wsi->active_extensions_user[n], NULL, 0);
+ if (m > handled)
+ handled = m;
+ }
+
+ if (handled == 1)
+ goto notify_action;
+
+ if (!wsi->extension_data_pending || handled == 2)
+ goto user_service;
+
+ /*
+ * check in on the active extensions, see if they
+ * had pending stuff to spill... they need to get the
+ * first look-in otherwise sequence will be disordered
+ *
+ * NULL, zero-length eff_buf means just spill pending
+ */
+
+ ret = 1;
+ while (ret == 1) {
+
+ /* default to nobody has more to spill */
+
+ ret = 0;
+ eff_buf.token = NULL;
+ eff_buf.token_len = 0;
+
+ /* give every extension a chance to spill */
+
+ for (n = 0; n < wsi->count_active_extensions; n++) {
+ m = wsi->active_extensions[n]->callback(
+ wsi->protocol->owning_server,
+ wsi->active_extensions[n], wsi,
+ LWS_EXT_CALLBACK_PACKET_TX_PRESEND,
+ wsi->active_extensions_user[n], &eff_buf, 0);
+ if (m < 0) {
+ fprintf(stderr, "extension reports fatal error\n");
+ return -1;
+ }
+ if (m)
+ /*
+ * at least one extension told us he has more
+ * to spill, so we will go around again after
+ */
+ ret = 1;
+ }
+
+ /* assuming they gave us something to send, send it */
+
+ if (eff_buf.token_len) {
+ if (lws_issue_raw(wsi, (unsigned char *)eff_buf.token,
+ eff_buf.token_len))
+ return -1;
+ } else
+ continue;
+
+ /* no extension has more to spill */
+
+ if (!ret)
+ continue;
+
+ /*
+ * There's more to spill from an extension, but we just sent
+ * something... did that leave the pipe choked?
+ */
+
+ if (!lws_send_pipe_choked(wsi))
+ /* no we could add more */
+ continue;
+
+ debug("choked in POLLOUT service\n");
+
+ /*
+ * Yes, he's choked. Leave the POLLOUT masked on so we will
+ * come back here when he is unchoked. Don't call the user
+ * callback to enforce ordering of spilling, he'll get called
+ * when we come back here and there's nothing more to spill.
+ */
+
+ return 0;
+ }
+
+ wsi->extension_data_pending = 0;
+
+user_service:
+ /* one shot */
+
+ if (pollfd) {
+ pollfd->events &= ~POLLOUT;
+
+ /* external POLL support via protocol 0 */
+ context->protocols[0].callback(context, wsi,
+ LWS_CALLBACK_CLEAR_MODE_POLL_FD,
+ (void *)(long)wsi->sock, NULL, POLLOUT);
+ }
+
+notify_action:
+
+ if (wsi->mode == LWS_CONNMODE_WS_CLIENT)
+ n = LWS_CALLBACK_CLIENT_WRITEABLE;
+ else
+ n = LWS_CALLBACK_SERVER_WRITEABLE;
+
+ wsi->protocol->callback(context, wsi, n, wsi->user_space, NULL, 0);
+
+ return 0;
+}
+
+
+
+void
+libwebsocket_service_timeout_check(struct libwebsocket_context *context,
+ struct libwebsocket *wsi, unsigned int sec)
+{
+ int n;
+
+ /*
+ * if extensions want in on it (eg, we are a mux parent)
+ * give them a chance to service child timeouts
+ */
+
+ for (n = 0; n < wsi->count_active_extensions; n++)
+ wsi->active_extensions[n]->callback(
+ context, wsi->active_extensions[n],
+ wsi, LWS_EXT_CALLBACK_1HZ,
+ wsi->active_extensions_user[n], NULL, sec);
+
+ if (!wsi->pending_timeout)
+ return;
+
+ /*
+ * if we went beyond the allowed time, kill the
+ * connection
+ */
+
+ if (sec > wsi->pending_timeout_limit) {
+ debug("TIMEDOUT WAITING\n");
+ libwebsocket_close_and_free_session(context,
+ wsi, LWS_CLOSE_STATUS_NOSTATUS);
+ }
+}
+
+struct libwebsocket *
+libwebsocket_create_new_server_wsi(struct libwebsocket_context *context)
+{
+ struct libwebsocket *new_wsi;
+ int n;
+
+ new_wsi = malloc(sizeof(struct libwebsocket));
+ if (new_wsi == NULL) {
+ fprintf(stderr, "Out of memory for new connection\n");
+ return NULL;
+ }
+
+ memset(new_wsi, 0, sizeof (struct libwebsocket));
+ new_wsi->count_active_extensions = 0;
+ new_wsi->pending_timeout = NO_PENDING_TIMEOUT;
+
+ /* intialize the instance struct */
+
+ new_wsi->state = WSI_STATE_HTTP;
+ new_wsi->name_buffer_pos = 0;
+ new_wsi->mode = LWS_CONNMODE_WS_SERVING;
+
+ for (n = 0; n < WSI_TOKEN_COUNT; n++) {
+ new_wsi->utf8_token[n].token = NULL;
+ new_wsi->utf8_token[n].token_len = 0;
+ }
+
+ /*
+ * these can only be set once the protocol is known
+ * we set an unestablished connection's protocol pointer
+ * to the start of the supported list, so it can look
+ * for matching ones during the handshake
+ */
+ new_wsi->protocol = context->protocols;
+ new_wsi->user_space = NULL;
+
+ /*
+ * Default protocol is 76 / 00
+ * After 76, there's a header specified to inform which
+ * draft the client wants, when that's seen we modify
+ * the individual connection's spec revision accordingly
+ */
+ new_wsi->ietf_spec_revision = 0;
+
+ return new_wsi;
+}
+
+char *
+libwebsockets_generate_client_handshake(struct libwebsocket_context *context,
+ struct libwebsocket *wsi, char *pkt)
+{
+ char hash[20];
+ char *p = pkt;
+ int n;
+ struct libwebsocket_extension *ext;
+ struct libwebsocket_extension *ext1;
+ int ext_count = 0;
+ 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
+ */
+
+ n = libwebsockets_get_random(context, hash, 16);
+ if (n != 16) {
+ fprintf(stderr, "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);
+
+ /*
+ * 00 example client handshake
+ *
+ * GET /socket.io/websocket HTTP/1.1
+ * Upgrade: WebSocket
+ * Connection: Upgrade
+ * Host: 127.0.0.1:9999
+ * Origin: http://127.0.0.1
+ * Sec-WebSocket-Key1: 1 0 2#0W 9 89 7 92 ^
+ * Sec-WebSocket-Key2: 7 7Y 4328 B2v[8(z1
+ * Cookie: socketio=websocket
+ *
+ * (Á®Ä0¶†≥
+ *
+ * 04 example client handshake
+ *
+ * GET /chat HTTP/1.1
+ * Host: server.example.com
+ * Upgrade: websocket
+ * Connection: Upgrade
+ * Sec-WebSocket-Key: dGhlIHNhbXBsZSBub25jZQ==
+ * Sec-WebSocket-Origin: http://example.com
+ * Sec-WebSocket-Protocol: chat, superchat
+ * Sec-WebSocket-Version: 4
+ */
+
+ p += sprintf(p, "GET %s HTTP/1.1\x0d\x0a", wsi->c_path);
+
+ 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, "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);
+
+ 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");
+ p += sprintf(p, "Connection: Upgrade\x0d\x0a"
+ "Sec-WebSocket-Key: ");
+ strcpy(p, wsi->key_b64);
+ p += strlen(wsi->key_b64);
+ p += sprintf(p, "\x0d\x0a");
+ if (wsi->c_origin)
+ p += sprintf(p, "Sec-WebSocket-Origin: %s\x0d\x0a",
+ wsi->c_origin);
+ if (wsi->c_protocol)
+ p += sprintf(p, "Sec-WebSocket-Protocol: %s\x0d\x0a",
+ wsi->c_protocol);
+
+ /* tell the server what extensions we could support */
+
+ p += sprintf(p, "Sec-WebSocket-Extensions: ");
+
+ ext =context->extensions;
+ while (ext && ext->callback) {
+
+ n = 0;
+ ext1 = context->extensions;
+ while (ext1 && ext1->callback) {
+
+ n |= ext1->callback(context, ext1, wsi,
+ LWS_EXT_CALLBACK_CHECK_OK_TO_PROPOSE_EXTENSION,
+ NULL, (char *)ext->name, 0);
+
+ ext1++;
+ }
+
+ if (n) {
+
+ /* an extension vetos us */
+ debug("ext %s vetoed\n", (char *)ext->name);
+ ext++;
+ continue;
+ }
+
+ n = context->protocols[0].callback(context, wsi,
+ LWS_CALLBACK_CLIENT_CONFIRM_EXTENSION_SUPPORTED,
+ wsi->user_space, (char *)ext->name, 0);
+
+ /*
+ * zero return from callback means
+ * go ahead and allow the extension,
+ * it's what we get if the callback is
+ * unhandled
+ */
+
+ if (n) {
+ ext++;
+ continue;
+ }
+
+ /* apply it */
+
+ if (ext_count)
+ *p++ = ',';
+ p += sprintf(p, "%s", ext->name);
+ ext_count++;
+
+ ext++;
+ }
+
+ p += sprintf(p, "\x0d\x0a");
+
+ if (wsi->ietf_spec_revision)
+ p += sprintf(p, "Sec-WebSocket-Version: %d\x0d\x0a",
+ wsi->ietf_spec_revision);
+
+ /* 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");
+
+ /* prepare the expected server accept response */
+
+ strcpy((char *)buf, wsi->key_b64);
+ strcpy((char *)&buf[strlen((char *)buf)], magic_websocket_guid);
+
+ SHA1(buf, strlen((char *)buf), (unsigned char *)hash);
+
+ lws_b64_encode_string(hash, 20,
+ wsi->initial_handshake_hash_base64,
+ sizeof wsi->initial_handshake_hash_base64);
+
+issue_hdr:
+
+// puts(pkt);
+
+ /* done with these now */
+
+ free(wsi->c_path);
+ free(wsi->c_host);
+ if (wsi->c_origin)
+ free(wsi->c_origin);
+
+ return p;
+}
+
+int
+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;
+ const char *c;
+ int more = 1;
+ int okay = 0;
+ char ext_name[128];
+ struct libwebsocket_extension *ext;
+ void *v;
+ 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 ||
+ (!wsi->utf8_token[WSI_TOKEN_PROTOCOL].token_len &&
+ wsi->c_protocol != NULL)) {
+ debug("libwebsocket_client_handshake "
+ "missing required header(s)\n");
+ pkt[len] = '\0';
+ debug("%s", pkt);
+ goto bail3;
+ }
+
+ strtolower(wsi->utf8_token[WSI_TOKEN_HTTP].token);
+ if (strncmp(wsi->utf8_token[WSI_TOKEN_HTTP].token,
+ "101", 3)) {
+ fprintf(stderr, "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) {
+ fprintf(stderr, "libwebsocket_client_handshake "
+ "challenge reply too short %d\n",
+ wsi->utf8_token[
+ WSI_TOKEN_CHALLENGE].token_len);
+ pkt[len] = '\0';
+ debug("%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
+ fprintf(stderr, "WSI_TOKEN_HTTP: %d\n", wsi->utf8_token[WSI_TOKEN_HTTP].token_len);
+ fprintf(stderr, "WSI_TOKEN_UPGRADE: %d\n", wsi->utf8_token[WSI_TOKEN_UPGRADE].token_len);
+ fprintf(stderr, "WSI_TOKEN_CONNECTION: %d\n", wsi->utf8_token[WSI_TOKEN_CONNECTION].token_len);
+ fprintf(stderr, "WSI_TOKEN_ACCEPT: %d\n", wsi->utf8_token[WSI_TOKEN_ACCEPT].token_len);
+ fprintf(stderr, "WSI_TOKEN_NONCE: %d\n", wsi->utf8_token[WSI_TOKEN_NONCE].token_len);
+ fprintf(stderr, "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) ||
+ (!wsi->utf8_token[WSI_TOKEN_PROTOCOL].token_len &&
+ wsi->c_protocol != NULL)) {
+ debug("libwebsocket_client_handshake "
+ "missing required header(s)\n");
+ pkt[len] = '\0';
+ debug("%s", pkt);
+ 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)) {
+ fprintf(stderr, "libwebsocket_client_handshake "
+ "server sent bad HTTP response '%s'\n",
+ wsi->utf8_token[WSI_TOKEN_HTTP].token);
+ goto bail3;
+ }
+
+ strtolower(wsi->utf8_token[WSI_TOKEN_UPGRADE].token);
+ if (strcmp(wsi->utf8_token[WSI_TOKEN_UPGRADE].token,
+ "websocket")) {
+ fprintf(stderr, "libwebsocket_client_handshake server "
+ "sent bad Upgrade header '%s'\n",
+ wsi->utf8_token[WSI_TOKEN_UPGRADE].token);
+ goto bail3;
+ }
+
+ strtolower(wsi->utf8_token[WSI_TOKEN_CONNECTION].token);
+ if (strcmp(wsi->utf8_token[WSI_TOKEN_CONNECTION].token,
+ "upgrade")) {
+ fprintf(stderr, "libwebsocket_client_handshake server "
+ "sent bad Connection hdr '%s'\n",
+ wsi->utf8_token[WSI_TOKEN_CONNECTION].token);
+ goto bail3;
+ }
+
+select_protocol:
+ pc = wsi->c_protocol;
+ if (pc == NULL)
+ fprintf(stderr, "lws_client_interpret_server_handshake: NULL c_protocol\n");
+ else
+ debug("lws_client_interpret_server_handshake: cPprotocol='%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) {
+
+ fprintf(stderr, "lws_client_interpret_server_handshake WSI_TOKEN_PROTOCOL is null\n");
+ /*
+ * no protocol name to work from,
+ * default to first protocol
+ */
+ wsi->protocol = &context->protocols[0];
+
+ free(wsi->c_protocol);
+
+ goto check_accept;
+ }
+
+ 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')) {
+ okay = 1;
+ continue;
+ }
+ while (*pc && *pc != ',')
+ pc++;
+ while (*pc && *pc != ' ')
+ pc++;
+ }
+
+ /* done with him now */
+
+ if (wsi->c_protocol)
+ free(wsi->c_protocol);
+
+
+ if (!okay) {
+ fprintf(stderr, "libwebsocket_client_handshake server "
+ "sent bad protocol '%s'\n",
+ wsi->utf8_token[WSI_TOKEN_PROTOCOL].token);
+ goto bail2;
+ }
+
+ /*
+ * identify the selected protocol struct and set it
+ */
+ n = 0;
+ wsi->protocol = NULL;
+ while (context->protocols[n].callback) {
+ if (strcmp(wsi->utf8_token[WSI_TOKEN_PROTOCOL].token,
+ context->protocols[n].name) == 0)
+ wsi->protocol = &context->protocols[n];
+ n++;
+ }
+
+ if (wsi->protocol == NULL) {
+ fprintf(stderr, "libwebsocket_client_handshake server "
+ "requested protocol '%s', which we "
+ "said we supported but we don't!\n",
+ wsi->utf8_token[WSI_TOKEN_PROTOCOL].token);
+ goto bail2;
+ }
+
+
+ /* instantiate the accepted extensions */
+
+ if (!wsi->utf8_token[WSI_TOKEN_EXTENSIONS].token_len) {
+ debug("no client extenstions allowed by server \n");
+ goto check_accept;
+ }
+
+ /*
+ * break down the list of server accepted extensions
+ * and go through matching them or identifying bogons
+ */
+
+ c = wsi->utf8_token[WSI_TOKEN_EXTENSIONS].token;
+ n = 0;
+ while (more) {
+
+ if (*c && (*c != ',' && *c != ' ' && *c != '\t')) {
+ ext_name[n] = *c++;
+ if (n < sizeof(ext_name) - 1)
+ n++;
+ continue;
+ }
+ ext_name[n] = '\0';
+ if (!*c)
+ more = 0;
+ else {
+ c++;
+ if (!n)
+ continue;
+ }
+
+ /* check we actually support it */
+
+ debug("checking client ext %s\n", ext_name);
+
+ n = 0;
+ ext = wsi->protocol->owning_server->extensions;
+ while (ext && ext->callback) {
+
+ if (strcmp(ext_name, ext->name)) {
+ ext++;
+ continue;
+ }
+
+ n = 1;
+
+ debug("instantiating client ext %s\n", ext_name);
+
+ /* instantiate the extension on this conn */
+
+ wsi->active_extensions_user[
+ wsi->count_active_extensions] =
+ malloc(ext->per_session_data_size);
+ memset(wsi->active_extensions_user[
+ wsi->count_active_extensions], 0,
+ ext->per_session_data_size);
+ wsi->active_extensions[
+ wsi->count_active_extensions] = ext;
+
+ /* allow him to construct his context */
+
+ ext->callback(wsi->protocol->owning_server,
+ ext, wsi,
+ LWS_EXT_CALLBACK_CLIENT_CONSTRUCT,
+ wsi->active_extensions_user[
+ wsi->count_active_extensions],
+ NULL, 0);
+
+ wsi->count_active_extensions++;
+
+ ext++;
+ }
+
+ if (n == 0) {
+ fprintf(stderr, "Server said we should use"
+ "an unknown extension '%s'!\n", ext_name);
+ goto bail2;
+ }
+
+ n = 0;
+ }
+
+
+check_accept:
+
+ if (wsi->ietf_spec_revision == 0) {
+
+ if (memcmp(wsi->initial_handshake_hash_base64,
+ wsi->utf8_token[WSI_TOKEN_CHALLENGE].token, 16)) {
+ fprintf(stderr, "libwebsocket_client_handshake "
+ "failed 00 challenge compare\n");
+ pkt[len] = '\0';
+ fprintf(stderr, "%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)) {
+ fprintf(stderr, "libwebsocket_client_handshake server "
+ "sent bad ACCEPT '%s' vs computed '%s'\n",
+ wsi->utf8_token[WSI_TOKEN_ACCEPT].token,
+ wsi->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))
+ goto bail2;
+
+ /* clear his proxy connection timeout */
+
+ libwebsocket_set_timeout(wsi, NO_PENDING_TIMEOUT, 0);
+
+ /* mark him as being alive */
+
+ wsi->state = WSI_STATE_ESTABLISHED;
+ wsi->mode = LWS_CONNMODE_WS_CLIENT;
+
+ fprintf(stderr, "handshake OK for protocol %s\n",
+ wsi->protocol->name);
+
+ /* call him back to inform him he is up */
+
+ wsi->protocol->callback(context, wsi,
+ LWS_CALLBACK_CLIENT_ESTABLISHED,
+ wsi->user_space,
+ NULL, 0);
+
+ /*
+ * inform all extensions, not just active ones since they
+ * already know
+ */
+
+ ext = context->extensions;
+
+ while (ext && ext->callback) {
+ v = NULL;
+ for (n = 0; n < wsi->count_active_extensions; n++)
+ if (wsi->active_extensions[n] == ext)
+ v = wsi->active_extensions_user[n];
+
+ ext->callback(context, ext, wsi,
+ LWS_EXT_CALLBACK_ANY_WSI_ESTABLISHED, v, NULL, 0);
+ ext++;
+ }
+
+ return 0;
+
+bail3:
+ if (wsi->c_protocol)
+ free(wsi->c_protocol);
+
+bail2:
+ libwebsocket_close_and_free_session(context, wsi,
+ LWS_CLOSE_STATUS_NOSTATUS);
+ return 1;
+}
+
+
+
/**
* libwebsocket_service_fd() - Service polled socket with something waiting
- * @this: Websocket context
+ * @context: Websocket context
* @pollfd: The pollfd entry describing the socket fd and which events
* happened.
*
*/
int
-libwebsocket_service_fd(struct libwebsocket_context *this,
+libwebsocket_service_fd(struct libwebsocket_context *context,
struct pollfd *pollfd)
{
- unsigned char buf[LWS_SEND_BUFFER_PRE_PADDING + MAX_BROADCAST_PAYLOAD +
+ unsigned char buf[LWS_SEND_BUFFER_PRE_PADDING + 1 + MAX_BROADCAST_PAYLOAD +
LWS_SEND_BUFFER_POST_PADDING];
- struct libwebsocket *wsi = wsi_from_fd(this, pollfd->fd);
+ struct libwebsocket *wsi;
struct libwebsocket *new_wsi;
int n;
int m;
- size_t len;
+ ssize_t len;
int accept_fd;
unsigned int clilen;
struct sockaddr_in cli_addr;
+ struct timeval tv;
+ char pkt[1024];
+ char *p = &pkt[0];
+ int more = 1;
+ struct lws_tokens eff_buf;
+ int opt = 1;
+ char c;
+
+#ifdef LWS_OPENSSL_SUPPORT
+ char ssl_err_buf[512];
+#endif
+ /*
+ * you can call us with pollfd = NULL to just allow the once-per-second
+ * global timeout checks; if less than a second since the last check
+ * it returns immediately then.
+ */
+
+ gettimeofday(&tv, NULL);
+
+ if (context->last_timeout_check_s != tv.tv_sec) {
+ context->last_timeout_check_s = tv.tv_sec;
+
+ /* global timeout check once per second */
+
+ for (n = 0; n < context->fds_count; n++) {
+ wsi = wsi_from_fd(context, context->fds[n].fd);
+
+ libwebsocket_service_timeout_check(context, wsi,
+ tv.tv_sec);
+ }
+ }
+
+ /* just here for timeout management? */
+
+ if (pollfd == NULL)
+ return 0;
+
+ /* no, here to service a socket descriptor */
+
+ wsi = wsi_from_fd(context, pollfd->fd);
if (wsi == NULL)
return 1;
if (!pollfd->revents & POLLIN)
break;
+ if (context->fds_count >= MAX_CLIENTS) {
+ fprintf(stderr, "too busy to accept new client\n");
+ break;
+ }
+
/* listen socket got an unencrypted connection... */
clilen = sizeof(cli_addr);
break;
}
- if (this->fds_count >= MAX_CLIENTS) {
- fprintf(stderr, "too busy to accept new client\n");
- close(accept_fd);
- break;
- }
+ /* Disable Nagle */
+ opt = 1;
+ setsockopt(accept_fd, IPPROTO_TCP, TCP_NODELAY, (const void *)&opt,
+ sizeof(opt));
/*
* look at who we connected to and give user code a chance
* yet so we issue this to protocols[0]
*/
- if ((this->protocols[0].callback)(wsi,
+ if ((context->protocols[0].callback)(context, wsi,
LWS_CALLBACK_FILTER_NETWORK_CONNECTION,
(void*)(long)accept_fd, NULL, 0)) {
- fprintf(stderr, "Callback denied network connection\n");
+ debug("Callback denied network connection\n");
+#ifdef WIN32
+ closesocket(accept_fd);
+#else
close(accept_fd);
+#endif
break;
}
/* accepting connection to main listener */
- new_wsi = malloc(sizeof(struct libwebsocket));
- if (new_wsi == NULL) {
- fprintf(stderr, "Out of memory for new connection\n");
+ new_wsi = libwebsocket_create_new_server_wsi(context);
+ if (new_wsi == NULL)
break;
- }
- memset(new_wsi, 0, sizeof (struct libwebsocket));
new_wsi->sock = accept_fd;
+
#ifdef LWS_OPENSSL_SUPPORT
new_wsi->ssl = NULL;
- this->ssl_ctx = NULL;
- if (this->use_ssl) {
+ if (context->use_ssl) {
- new_wsi->ssl = SSL_new(this->ssl_ctx);
+ new_wsi->ssl = SSL_new(context->ssl_ctx);
if (new_wsi->ssl == NULL) {
fprintf(stderr, "SSL_new failed: %s\n",
ERR_error_string(SSL_get_error(
new_wsi->ssl, 0), NULL));
+ libwebsockets_decode_ssl_error();
free(new_wsi);
break;
}
free(new_wsi);
break;
}
+
debug("accepted new SSL conn "
"port %u on fd=%d SSL ver %s\n",
ntohs(cli_addr.sin_port), accept_fd,
- SSL_get_version(new_wsi->ssl));
-
- } else
-#endif
- debug("accepted new conn port %u on fd=%d\n",
- ntohs(cli_addr.sin_port), accept_fd);
-
- /* intialize the instance struct */
-
- new_wsi->state = WSI_STATE_HTTP;
- new_wsi->name_buffer_pos = 0;
- new_wsi->mode = LWS_CONNMODE_WS_SERVING;
-
- for (n = 0; n < WSI_TOKEN_COUNT; n++) {
- new_wsi->utf8_token[n].token = NULL;
- new_wsi->utf8_token[n].token_len = 0;
- }
-
- /*
- * these can only be set once the protocol is known
- * we set an unestablished connection's protocol pointer
- * to the start of the supported list, so it can look
- * for matching ones during the handshake
- */
- new_wsi->protocol = this->protocols;
- new_wsi->user_space = NULL;
+ SSL_get_version(new_wsi->ssl));
- /*
- * Default protocol is 76 / 00
- * After 76, there's a header specified to inform which
- * draft the client wants, when that's seen we modify
- * the individual connection's spec revision accordingly
- */
- new_wsi->ietf_spec_revision = 0;
+ } else
+#endif
+ debug("accepted new conn port %u on fd=%d\n",
+ ntohs(cli_addr.sin_port), accept_fd);
- insert_wsi(this, new_wsi);
+ insert_wsi(context, new_wsi);
/*
* make sure NO events are seen yet on this new socket
* (otherwise we inherit old fds[client].revents from
* previous socket there and die mysteriously! )
*/
- this->fds[this->fds_count].revents = 0;
+ context->fds[context->fds_count].revents = 0;
- this->fds[this->fds_count].events = POLLIN;
- this->fds[this->fds_count++].fd = accept_fd;
+ context->fds[context->fds_count].events = POLLIN;
+ context->fds[context->fds_count++].fd = accept_fd;
/* external POLL support via protocol 0 */
- this->protocols[0].callback(new_wsi,
+ context->protocols[0].callback(context, new_wsi,
LWS_CALLBACK_ADD_POLL_FD,
(void *)(long)accept_fd, NULL, POLLIN);
break;
}
- if (this->fds_count >= MAX_CLIENTS) {
+ if (context->fds_count >= MAX_CLIENTS) {
fprintf(stderr, "too busy to accept new broadcast "
"proxy client\n");
+#ifdef WIN32
+ closesocket(accept_fd);
+#else
close(accept_fd);
+#endif
break;
}
new_wsi->sock = accept_fd;
new_wsi->mode = LWS_CONNMODE_BROADCAST_PROXY;
new_wsi->state = WSI_STATE_ESTABLISHED;
+ new_wsi->count_active_extensions = 0;
/* note which protocol we are proxying */
new_wsi->protocol_index_for_broadcast_proxy =
wsi->protocol_index_for_broadcast_proxy;
- insert_wsi(this, new_wsi);
+ insert_wsi(context, new_wsi);
/* add connected socket to internal poll array */
- this->fds[this->fds_count].revents = 0;
- this->fds[this->fds_count].events = POLLIN;
- this->fds[this->fds_count++].fd = accept_fd;
+ context->fds[context->fds_count].revents = 0;
+ context->fds[context->fds_count].events = POLLIN;
+ context->fds[context->fds_count++].fd = accept_fd;
/* external POLL support via protocol 0 */
- this->protocols[0].callback(new_wsi,
+ context->protocols[0].callback(context, new_wsi,
LWS_CALLBACK_ADD_POLL_FD,
(void *)(long)accept_fd, NULL, POLLIN);
if (pollfd->revents & (POLLERR | POLLHUP)) {
debug("Session Socket %p (fd=%d) dead\n",
- (void *)wsi, accept_fd);
+ (void *)wsi, pollfd->fd);
- libwebsocket_close_and_free_session(wsi);
- goto nuke_this;
+ libwebsocket_close_and_free_session(context, wsi,
+ LWS_CLOSE_STATUS_NORMAL);
+ return 1;
}
- /* the guy requested a callback when it was OK to write */
-
- if (pollfd->revents & POLLOUT) {
-
- /* one shot */
-
- pollfd->events &= ~POLLOUT;
-
- /* external POLL support via protocol 0 */
- this->protocols[0].callback(wsi,
- LWS_CALLBACK_CLEAR_MODE_POLL_FD,
- (void *)(long)wsi->sock, NULL, POLLOUT);
+ /*
+ * either extension code with stuff to spill, or the user code,
+ * requested a callback when it was OK to write
+ */
- wsi->protocol->callback(wsi,
- LWS_CALLBACK_CLIENT_WRITEABLE,
- wsi->user_space,
- NULL, 0);
- }
+ if (pollfd->revents & POLLOUT)
+ if (lws_handle_POLLOUT_event(context, wsi, pollfd) < 0) {
+ libwebsocket_close_and_free_session(context, wsi,
+ LWS_CLOSE_STATUS_NORMAL);
+ return 1;
+ }
/* any incoming data ready? */
MAX_BROADCAST_PAYLOAD);
if (len < 0) {
fprintf(stderr, "Error reading broadcast payload\n");
- break;;
+ break;
}
/* broadcast it to all guys with this protocol index */
for (n = 0; n < FD_HASHTABLE_MODULUS; n++) {
- for (m = 0; m < this->fd_hashtable[n].length; m++) {
+ for (m = 0; m < context->fd_hashtable[n].length; m++) {
- new_wsi = this->fd_hashtable[n].wsi[m];
+ new_wsi = context->fd_hashtable[n].wsi[m];
/* only to clients we are serving to */
/* broadcast it to this connection */
- new_wsi->protocol->callback(new_wsi,
+ new_wsi->protocol->callback(context, new_wsi,
LWS_CALLBACK_BROADCAST,
new_wsi->user_space,
buf + LWS_SEND_BUFFER_PRE_PADDING, len);
}
break;
+ case LWS_CONNMODE_WS_CLIENT_WAITING_PROXY_REPLY:
+
+ /* handle proxy hung up on us */
+
+ if (pollfd->revents & (POLLERR | POLLHUP)) {
+
+ fprintf(stderr, "Proxy connection %p (fd=%d) dead\n",
+ (void *)wsi, pollfd->fd);
+
+ libwebsocket_close_and_free_session(context, wsi,
+ LWS_CLOSE_STATUS_NOSTATUS);
+ return 1;
+ }
+
+ n = recv(wsi->sock, pkt, sizeof pkt, 0);
+ if (n < 0) {
+ libwebsocket_close_and_free_session(context, wsi,
+ LWS_CLOSE_STATUS_NOSTATUS);
+ fprintf(stderr, "ERROR reading from proxy socket\n");
+ return 1;
+ }
+
+ pkt[13] = '\0';
+ if (strcmp(pkt, "HTTP/1.0 200 ") != 0) {
+ libwebsocket_close_and_free_session(context, wsi,
+ LWS_CLOSE_STATUS_NOSTATUS);
+ fprintf(stderr, "ERROR from proxy: %s\n", pkt);
+ return 1;
+ }
+
+ /* clear his proxy connection timeout */
+
+ libwebsocket_set_timeout(wsi, NO_PENDING_TIMEOUT, 0);
+
+ /* fallthru */
+
+ case LWS_CONNMODE_WS_CLIENT_ISSUE_HANDSHAKE:
+
+ #ifdef LWS_OPENSSL_SUPPORT
+ if (wsi->use_ssl) {
+
+ wsi->ssl = SSL_new(context->ssl_client_ctx);
+ wsi->client_bio = BIO_new_socket(wsi->sock,
+ BIO_NOCLOSE);
+ SSL_set_bio(wsi->ssl, wsi->client_bio, wsi->client_bio);
+
+ SSL_set_ex_data(wsi->ssl,
+ openssl_websocket_private_data_index,
+ context);
+
+ if (SSL_connect(wsi->ssl) <= 0) {
+ fprintf(stderr, "SSL connect error %s\n",
+ ERR_error_string(ERR_get_error(),
+ ssl_err_buf));
+ libwebsocket_close_and_free_session(context, wsi,
+ LWS_CLOSE_STATUS_NOSTATUS);
+ return 1;
+ }
+
+ n = SSL_get_verify_result(wsi->ssl);
+ if ((n != X509_V_OK) && (
+ n != X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT ||
+ wsi->use_ssl != 2)) {
+
+ fprintf(stderr, "server's cert didn't "
+ "look good %d\n", n);
+ libwebsocket_close_and_free_session(context,
+ wsi, LWS_CLOSE_STATUS_NOSTATUS);
+ return 1;
+ }
+ } else {
+ wsi->ssl = NULL;
+ #endif
+
+
+ #ifdef LWS_OPENSSL_SUPPORT
+ }
+ #endif
+
+ p = libwebsockets_generate_client_handshake(context, wsi, p);
+ if (p ==NULL)
+ return 1;
+
+ /* send our request to the server */
+
+ #ifdef LWS_OPENSSL_SUPPORT
+ if (wsi->use_ssl)
+ n = SSL_write(wsi->ssl, pkt, p - pkt);
+ else
+ #endif
+ n = send(wsi->sock, pkt, p - pkt, 0);
+
+ if (n < 0) {
+ fprintf(stderr, "ERROR writing to client socket\n");
+ libwebsocket_close_and_free_session(context, wsi,
+ LWS_CLOSE_STATUS_NOSTATUS);
+ return 1;
+ }
+
+ wsi->parser_state = WSI_TOKEN_NAME_PART;
+ wsi->mode = LWS_CONNMODE_WS_CLIENT_WAITING_SERVER_REPLY;
+ libwebsocket_set_timeout(wsi,
+ PENDING_TIMEOUT_AWAITING_SERVER_RESPONSE, 5);
+
+ break;
+
+ case LWS_CONNMODE_WS_CLIENT_WAITING_SERVER_REPLY:
+
+ /* handle server hung up on us */
+
+ if (pollfd->revents & (POLLERR | POLLHUP)) {
+
+ fprintf(stderr, "Server connection %p (fd=%d) dead\n",
+ (void *)wsi, pollfd->fd);
+
+ goto bail3;
+ }
+
+
+ /* interpret the server response */
+
+ /*
+ * HTTP/1.1 101 Switching Protocols
+ * Upgrade: websocket
+ * Connection: Upgrade
+ * Sec-WebSocket-Accept: me89jWimTRKTWwrS3aRrL53YZSo=
+ * Sec-WebSocket-Nonce: AQIDBAUGBwgJCgsMDQ4PEC==
+ * Sec-WebSocket-Protocol: chat
+ */
+
+ /*
+ * we have to take some care here to only take from the
+ * socket bytewise. The browser may (and has been seen to
+ * in the case that onopen() performs websocket traffic)
+ * coalesce both handshake response and websocket traffic
+ * in one packet, since at that point the connection is
+ * definitively ready from browser pov.
+ */
+
+ len = 1;
+ while (wsi->parser_state != WSI_PARSING_COMPLETE && len > 0) {
+#ifdef LWS_OPENSSL_SUPPORT
+ if (wsi->use_ssl)
+ len = SSL_read(wsi->ssl, &c, 1);
+ else
+#endif
+ len = recv(wsi->sock, &c, 1, 0);
+
+ libwebsocket_parse(wsi, c);
+ }
+
+ /*
+ * hs may also be coming in multiple packets, there is a 5-second
+ * libwebsocket timeout still active here too, so if parsing did
+ * not complete just wait for next packet coming in this state
+ */
+
+ if (wsi->parser_state != WSI_PARSING_COMPLETE)
+ break;
+
+ /*
+ * otherwise deal with the handshake. If there's any
+ * packet traffic already arrived we'll trigger poll() again
+ * right away and deal with it that way
+ */
+
+ return lws_client_interpret_server_handshake(context, wsi);
+
+bail3:
+ if (wsi->c_protocol)
+ free(wsi->c_protocol);
+ libwebsocket_close_and_free_session(context, wsi,
+ LWS_CLOSE_STATUS_NOSTATUS);
+ return 1;
+
+ case LWS_CONNMODE_WS_CLIENT_WAITING_EXTENSION_CONNECT:
+ fprintf(stderr, "LWS_CONNMODE_WS_CLIENT_WAITING_EXTENSION_CONNECT\n");
+ break;
+
+ case LWS_CONNMODE_WS_CLIENT_PENDING_CANDIDATE_CHILD:
+ fprintf(stderr, "LWS_CONNMODE_WS_CLIENT_PENDING_CANDIDATE_CHILD\n");
+ break;
+
+
case LWS_CONNMODE_WS_SERVING:
case LWS_CONNMODE_WS_CLIENT:
if (pollfd->revents & (POLLERR | POLLHUP)) {
- debug("Session Socket %p (fd=%d) dead\n",
+ fprintf(stderr, "Session Socket %p (fd=%d) dead\n",
(void *)wsi, pollfd->fd);
- libwebsocket_close_and_free_session(wsi);
- goto nuke_this;
+ libwebsocket_close_and_free_session(context, wsi,
+ LWS_CLOSE_STATUS_NOSTATUS);
+ return 1;
}
/* the guy requested a callback when it was OK to write */
- if (pollfd->revents & POLLOUT) {
-
- pollfd->events &= ~POLLOUT;
-
- /* external POLL support via protocol 0 */
- this->protocols[0].callback(wsi,
- LWS_CALLBACK_CLEAR_MODE_POLL_FD,
- (void *)(long)wsi->sock, NULL, POLLOUT);
+ if ((pollfd->revents & POLLOUT) &&
+ wsi->state == WSI_STATE_ESTABLISHED)
+ if (lws_handle_POLLOUT_event(context, wsi,
+ pollfd) < 0) {
+ libwebsocket_close_and_free_session(
+ context, wsi, LWS_CLOSE_STATUS_NORMAL);
+ return 1;
+ }
- wsi->protocol->callback(wsi,
- LWS_CALLBACK_CLIENT_WRITEABLE,
- wsi->user_space,
- NULL, 0);
- }
/* any incoming data ready? */
#ifdef LWS_OPENSSL_SUPPORT
if (wsi->ssl)
- n = SSL_read(wsi->ssl, buf, sizeof buf);
+ eff_buf.token_len = SSL_read(wsi->ssl, buf, sizeof buf);
else
#endif
- n = recv(pollfd->fd, buf, sizeof buf, 0);
-
- if (n < 0) {
- fprintf(stderr, "Socket read returned %d\n", n);
- break;;
+ eff_buf.token_len =
+ recv(pollfd->fd, buf, sizeof buf, 0);
+
+ if (eff_buf.token_len < 0) {
+ fprintf(stderr, "Socket read returned %d\n",
+ eff_buf.token_len);
+ if (errno != EINTR)
+ libwebsocket_close_and_free_session(context, wsi,
+ LWS_CLOSE_STATUS_NOSTATUS);
+ return 1;
}
- if (!n) {
- libwebsocket_close_and_free_session(wsi);
- goto nuke_this;
+ if (!eff_buf.token_len) {
+ libwebsocket_close_and_free_session(context, wsi,
+ LWS_CLOSE_STATUS_NOSTATUS);
+ return 1;
}
- /* service incoming data */
-
- n = libwebsocket_read(wsi, buf, n);
- if (n >= 0)
- break;;
/*
- * it closed and nuked wsi[client], so remove the
- * socket handle and wsi from our service list
+ * give any active extensions a chance to munge the buffer
+ * before parse. We pass in a pointer to an lws_tokens struct
+ * prepared with the default buffer and content length that's in
+ * there. Rather than rewrite the default buffer, extensions
+ * that expect to grow the buffer can adapt .token to
+ * point to their own per-connection buffer in the extension
+ * user allocation. By default with no extensions or no
+ * extension callback handling, just the normal input buffer is
+ * used then so it is efficient.
*/
-nuke_this:
- debug("nuking wsi %p, fsd_count = %d\n",
- (void *)wsi, this->fds_count - 1);
+ eff_buf.token = (char *)buf;
- delete_from_fd(this, pollfd->fd);
+ more = 1;
+ while (more) {
- this->fds_count--;
- for (n = 0; n < this->fds_count; n++)
- if (this->fds[n].fd == pollfd->fd) {
- while (n < this->fds_count) {
- this->fds[n] = this->fds[n + 1];
- n++;
+ more = 0;
+
+ for (n = 0; n < wsi->count_active_extensions; n++) {
+ m = wsi->active_extensions[n]->callback(context,
+ wsi->active_extensions[n], wsi,
+ LWS_EXT_CALLBACK_PACKET_RX_PREPARSE,
+ wsi->active_extensions_user[n],
+ &eff_buf, 0);
+ if (m < 0) {
+ fprintf(stderr, "Extension reports fatal error\n");
+ libwebsocket_close_and_free_session(context, wsi,
+ LWS_CLOSE_STATUS_NOSTATUS);
+ return 1;
}
- n = this->fds_count;
+ if (m)
+ more = 1;
}
- /* external POLL support via protocol 0 */
- this->protocols[0].callback(wsi,
- LWS_CALLBACK_DEL_POLL_FD,
- (void *)(long)pollfd->fd, NULL, 0);
+ /* service incoming data */
+ if (eff_buf.token_len) {
+ n = libwebsocket_read(context, wsi,
+ (unsigned char *)eff_buf.token, eff_buf.token_len);
+ if (n < 0)
+ /* we closed wsi */
+ return 1;
+ }
+ eff_buf.token = NULL;
+ eff_buf.token_len = 0;
+ }
break;
}
/**
* libwebsocket_context_destroy() - Destroy the websocket context
- * @this: Websocket context
+ * @context: Websocket context
*
* This function closes any active connections and then frees the
* context. After calling this, any further use of the context is
* undefined.
*/
void
-libwebsocket_context_destroy(struct libwebsocket_context *this)
+libwebsocket_context_destroy(struct libwebsocket_context *context)
{
int n;
int m;
struct libwebsocket *wsi;
+ struct libwebsocket_extension *ext;
- for (n = 0; n < FD_HASHTABLE_MODULUS; n++) {
-
- for (m = 0; m < this->fd_hashtable[n].length; m++) {
+ for (n = 0; n < FD_HASHTABLE_MODULUS; n++)
+ for (m = 0; m < context->fd_hashtable[n].length; m++) {
+ wsi = context->fd_hashtable[n].wsi[m];
+ libwebsocket_close_and_free_session(context, wsi,
+ LWS_CLOSE_STATUS_GOINGAWAY);
+ }
- wsi = this->fd_hashtable[n].wsi[m];
+ /*
+ * give all extensions a chance to clean up any per-context
+ * allocations they might have made
+ */
- switch (wsi->mode) {
- case LWS_CONNMODE_WS_SERVING:
- libwebsocket_close_and_free_session(wsi);
- break;
- case LWS_CONNMODE_WS_CLIENT:
- libwebsocket_client_close(wsi);
- break;
- default:
- break;
- }
- }
+ ext = context->extensions;
+ m = LWS_EXT_CALLBACK_CLIENT_CONTEXT_DESTRUCT;
+ if (context->listen_port)
+ m = LWS_EXT_CALLBACK_SERVER_CONTEXT_DESTRUCT;
+ while (ext->callback) {
+ ext->callback(context, ext, NULL, m, NULL, NULL, 0);
+ ext++;
}
- close(this->fd_random);
+#ifdef WIN32
+#else
+ close(context->fd_random);
+#endif
#ifdef LWS_OPENSSL_SUPPORT
- if (this->ssl_ctx)
- SSL_CTX_free(this->ssl_ctx);
- if (this->ssl_client_ctx)
- SSL_CTX_free(this->ssl_client_ctx);
+ if (context->ssl_ctx)
+ SSL_CTX_free(context->ssl_ctx);
+ if (context->ssl_client_ctx)
+ SSL_CTX_free(context->ssl_client_ctx);
#endif
- free(this);
+ free(context);
+
+#ifdef WIN32
+ WSACleanup();
+#endif
}
/**
* libwebsocket_service() - Service any pending websocket activity
- * @this: Websocket context
+ * @context: Websocket context
* @timeout_ms: Timeout for poll; 0 means return immediately if nothing needed
* service otherwise block and service immediately, returning
* after the timeout if nothing needed service.
int
-libwebsocket_service(struct libwebsocket_context *this, int timeout_ms)
+libwebsocket_service(struct libwebsocket_context *context, int timeout_ms)
{
int n;
/* stay dead once we are dead */
- if (this == NULL)
+ if (context == NULL)
return 1;
/* wait for something to need service */
- n = poll(this->fds, this->fds_count, timeout_ms);
+ n = poll(context->fds, context->fds_count, timeout_ms);
if (n == 0) /* poll timeout */
return 0;
- if (n < 0 || this->fds[0].revents & (POLLERR | POLLHUP)) {
+ if (n < 0) {
/*
fprintf(stderr, "Listen Socket dead\n");
*/
/* handle accept on listening socket? */
- for (n = 0; n < this->fds_count; n++)
- if (this->fds[n].revents)
- libwebsocket_service_fd(this, &this->fds[n]);
+ for (n = 0; n < context->fds_count; n++)
+ if (context->fds[n].revents)
+ libwebsocket_service_fd(context, &context->fds[n]);
return 0;
}
+int
+lws_any_extension_handled(struct libwebsocket_context *context,
+ struct libwebsocket *wsi,
+ enum libwebsocket_extension_callback_reasons r,
+ void *v, size_t len)
+{
+ int n;
+ int handled = 0;
+
+ /* maybe an extension will take care of it for us */
+
+ for (n = 0; n < wsi->count_active_extensions && !handled; n++) {
+ if (!wsi->active_extensions[n]->callback)
+ continue;
+
+ handled |= wsi->active_extensions[n]->callback(context,
+ wsi->active_extensions[n], wsi,
+ r, wsi->active_extensions_user[n], v, len);
+ }
+
+ return handled;
+}
+
+
+void *
+lws_get_extension_user_matching_ext(struct libwebsocket *wsi,
+ struct libwebsocket_extension * ext)
+{
+ int n = 0;
+
+ if (wsi == NULL)
+ return NULL;
+
+ while (n < wsi->count_active_extensions) {
+ if (wsi->active_extensions[n] != ext) {
+ n++;
+ continue;
+ }
+ return wsi->active_extensions_user[n];
+ }
+
+ return NULL;
+}
+
/**
* libwebsocket_callback_on_writable() - Request a callback when this socket
* becomes able to be written to without
* blocking
- * *
+ *
+ * @context: libwebsockets context
* @wsi: Websocket connection instance to get callback for
*/
int
-libwebsocket_callback_on_writable(struct libwebsocket *wsi)
+libwebsocket_callback_on_writable(struct libwebsocket_context *context,
+ struct libwebsocket *wsi)
{
- struct libwebsocket_context *this = wsi->protocol->owning_server;
int n;
+ int handled = 0;
+
+ /* maybe an extension will take care of it for us */
+
+ for (n = 0; n < wsi->count_active_extensions; n++) {
+ if (!wsi->active_extensions[n]->callback)
+ continue;
- for (n = 0; n < this->fds_count; n++)
- if (this->fds[n].fd == wsi->sock) {
- this->fds[n].events |= POLLOUT;
- n = this->fds_count;
+ handled |= wsi->active_extensions[n]->callback(context,
+ wsi->active_extensions[n], wsi,
+ LWS_EXT_CALLBACK_REQUEST_ON_WRITEABLE,
+ wsi->active_extensions_user[n], NULL, 0);
+ }
+
+ if (handled)
+ return 1;
+
+ for (n = 0; n < context->fds_count; n++)
+ if (context->fds[n].fd == wsi->sock) {
+ context->fds[n].events |= POLLOUT;
+ n = context->fds_count + 1;
}
+ if (n == context->fds_count)
+ fprintf(stderr, "libwebsocket_callback_on_writable: failed to find socket %d\n", wsi->sock);
+
/* external POLL support via protocol 0 */
- this->protocols[0].callback(wsi,
+ context->protocols[0].callback(context, wsi,
LWS_CALLBACK_SET_MODE_POLL_FD,
(void *)(long)wsi->sock, NULL, POLLOUT);
libwebsocket_callback_on_writable_all_protocol(
const struct libwebsocket_protocols *protocol)
{
- struct libwebsocket_context *this = protocol->owning_server;
+ struct libwebsocket_context *context = protocol->owning_server;
int n;
int m;
struct libwebsocket *wsi;
for (n = 0; n < FD_HASHTABLE_MODULUS; n++) {
- for (m = 0; m < this->fd_hashtable[n].length; m++) {
+ for (m = 0; m < context->fd_hashtable[n].length; m++) {
- wsi = this->fd_hashtable[n].wsi[m];
+ wsi = context->fd_hashtable[n].wsi[m];
if (wsi->protocol == protocol)
- libwebsocket_callback_on_writable(wsi);
+ libwebsocket_callback_on_writable(context, wsi);
}
}
return 0;
}
+/**
+ * libwebsocket_set_timeout() - marks the wsi as subject to a timeout
+ *
+ * You will not need this unless you are doing something special
+ *
+ * @wsi: Websocket connection instance
+ * @reason: timeout reason
+ * @secs: how many seconds
+ */
+
+void
+libwebsocket_set_timeout(struct libwebsocket *wsi,
+ enum pending_timeout reason, int secs)
+{
+ struct timeval tv;
+
+ gettimeofday(&tv, NULL);
+
+ wsi->pending_timeout_limit = tv.tv_sec + secs;
+ wsi->pending_timeout = reason;
+}
+
/**
* libwebsocket_get_socket_fd() - returns the socket file descriptor
int
libwebsocket_rx_flow_control(struct libwebsocket *wsi, int enable)
{
- struct libwebsocket_context *this = wsi->protocol->owning_server;
+ struct libwebsocket_context *context = wsi->protocol->owning_server;
int n;
- for (n = 0; n < this->fds_count; n++)
- if (this->fds[n].fd == wsi->sock) {
+ for (n = 0; n < context->fds_count; n++)
+ if (context->fds[n].fd == wsi->sock) {
if (enable)
- this->fds[n].events |= POLLIN;
+ context->fds[n].events |= POLLIN;
else
- this->fds[n].events &= ~POLLIN;
+ context->fds[n].events &= ~POLLIN;
return 0;
}
if (enable)
/* external POLL support via protocol 0 */
- this->protocols[0].callback(wsi,
+ context->protocols[0].callback(context, wsi,
LWS_CALLBACK_SET_MODE_POLL_FD,
(void *)(long)wsi->sock, NULL, POLLIN);
else
/* external POLL support via protocol 0 */
- this->protocols[0].callback(wsi,
+ context->protocols[0].callback(context, wsi,
LWS_CALLBACK_CLEAR_MODE_POLL_FD,
(void *)(long)wsi->sock, NULL, POLLIN);
-
- fprintf(stderr, "libwebsocket_callback_on_writable "
+#if 0
+ fprintf(stderr, "libwebsocket_rx_flow_control "
"unable to find socket\n");
+#endif
return 1;
}
* when making a client connection. You can only call it after the context
* has been created.
*
- * @this: Websocket context
+ * @context: Websocket context
*/
extern const char *
-libwebsocket_canonical_hostname(struct libwebsocket_context *this)
+libwebsocket_canonical_hostname(struct libwebsocket_context *context)
{
- return (const char *)this->canonical_hostname;
+ return (const char *)context->canonical_hostname;
}
{
}
+#ifdef LWS_OPENSSL_SUPPORT
+static int
+OpenSSL_verify_callback(int preverify_ok, X509_STORE_CTX *x509_ctx)
+{
+
+ SSL *ssl;
+ int n;
+ struct libwebsocket_context *context;
+
+ ssl = X509_STORE_CTX_get_ex_data(x509_ctx,
+ SSL_get_ex_data_X509_STORE_CTX_idx());
+
+ /*
+ * !!! nasty openssl requires the index to come as a library-scope
+ * static
+ */
+ context = SSL_get_ex_data(ssl, openssl_websocket_private_data_index);
+
+ n = context->protocols[0].callback(NULL, NULL,
+ LWS_CALLBACK_OPENSSL_PERFORM_CLIENT_CERT_VERIFICATION,
+ x509_ctx, ssl, preverify_ok);
+
+ /* convert return code from 0 = OK to 1 = OK */
+
+ if (!n)
+ n = 1;
+ else
+ n = 0;
+
+ return n;
+}
+#endif
/**
* @port: Port to listen on... you can use 0 to suppress listening on
* any port, that's what you want if you are not running a
* websocket server at all but just using it as a client
+ * @interf: NULL to bind the listen socket to all interfaces, or the
+ * interface name, eg, "eth2"
* @protocols: Array of structures listing supported protocols and a protocol-
* specific callback for each one. The list is ended with an
* entry that has a NULL callback pointer.
* It's not const because we write the owning_server member
+ * @extensions: NULL or array of libwebsocket_extension structs listing the
+ * extensions this context supports
* @ssl_cert_filepath: If libwebsockets was compiled to use ssl, and you want
* to listen using SSL, set to the filepath to fetch the
* server cert from, otherwise NULL for unencrypted
*/
struct libwebsocket_context *
-libwebsocket_create_context(int port,
+libwebsocket_create_context(int port, const char *interf,
struct libwebsocket_protocols *protocols,
+ struct libwebsocket_extension *extensions,
const char *ssl_cert_filepath,
const char *ssl_private_key_filepath,
int gid, int uid, unsigned int options)
{
int n;
+ int m;
int sockfd = 0;
int fd;
struct sockaddr_in serv_addr, cli_addr;
int opt = 1;
- struct libwebsocket_context *this = NULL;
+ struct libwebsocket_context *context = NULL;
unsigned int slen;
char *p;
char hostname[1024];
char ssl_err_buf[512];
#endif
- this = malloc(sizeof(struct libwebsocket_context));
- if (!this) {
+#ifdef _WIN32
+ {
+ WORD wVersionRequested;
+ WSADATA wsaData;
+ int err;
+ HMODULE wsdll;
+
+ /* Use the MAKEWORD(lowbyte, highbyte) macro from Windef.h */
+ wVersionRequested = MAKEWORD(2, 2);
+
+ err = WSAStartup(wVersionRequested, &wsaData);
+ if (err != 0) {
+ /* Tell the user that we could not find a usable */
+ /* Winsock DLL. */
+ fprintf(stderr, "WSAStartup failed with error: %d\n",
+ err);
+ return NULL;
+ }
+
+ wsdll = GetModuleHandle("Ws2_32.dll");
+ if (wsdll)
+ {
+ poll = (PFNWSAPOLL)GetProcAddress(wsdll, "WSAPoll");
+ }
+
+ if (!poll)
+ {
+ poll = emulated_poll;
+ }
+ }
+#endif
+
+
+ context = malloc(sizeof(struct libwebsocket_context));
+ if (!context) {
fprintf(stderr, "No memory for websocket context\n");
return NULL;
}
- this->protocols = protocols;
- this->listen_port = port;
- this->http_proxy_port = 0;
- this->http_proxy_address[0] = '\0';
- this->options = options;
- this->fds_count = 0;
-
- this->fd_random = open(SYSTEM_RANDOM_FILEPATH, O_RDONLY);
- if (this->fd_random < 0) {
+ context->protocols = protocols;
+ context->listen_port = port;
+ context->http_proxy_port = 0;
+ context->http_proxy_address[0] = '\0';
+ context->options = options;
+ context->fds_count = 0;
+ context->extensions = extensions;
+
+#ifdef WIN32
+ context->fd_random = 0;
+#else
+ context->fd_random = open(SYSTEM_RANDOM_FILEPATH, O_RDONLY);
+ if (context->fd_random < 0) {
fprintf(stderr, "Unable to open random device %s %d\n",
- SYSTEM_RANDOM_FILEPATH, this->fd_random);
+ SYSTEM_RANDOM_FILEPATH, context->fd_random);
return NULL;
}
+#endif
+#ifdef LWS_OPENSSL_SUPPORT
+ context->use_ssl = 0;
+ context->ssl_ctx = NULL;
+ context->ssl_client_ctx = NULL;
+ openssl_websocket_private_data_index = 0;
+#endif
/* find canonical hostname */
hostname[(sizeof hostname) - 1] = '\0';
gethostname(hostname, (sizeof hostname) - 1);
he = gethostbyname(hostname);
- strncpy(this->canonical_hostname, he->h_name,
- sizeof this->canonical_hostname - 1);
- this->canonical_hostname[sizeof this->canonical_hostname - 1] = '\0';
- fprintf(stderr, " canonical hostname = '%s'\n",
- this->canonical_hostname);
+ if (he) {
+ strncpy(context->canonical_hostname, he->h_name,
+ sizeof context->canonical_hostname - 1);
+ context->canonical_hostname[
+ sizeof context->canonical_hostname - 1] = '\0';
+ } else
+ strncpy(context->canonical_hostname, hostname,
+ sizeof context->canonical_hostname - 1);
/* split the proxy ads:port if given */
p = getenv("http_proxy");
if (p) {
- strncpy(this->http_proxy_address, p,
- sizeof this->http_proxy_address - 1);
- this->http_proxy_address[
- sizeof this->http_proxy_address - 1] = '\0';
+ strncpy(context->http_proxy_address, p,
+ sizeof context->http_proxy_address - 1);
+ context->http_proxy_address[
+ sizeof context->http_proxy_address - 1] = '\0';
- p = strchr(this->http_proxy_address, ':');
+ p = strchr(context->http_proxy_address, ':');
if (p == NULL) {
fprintf(stderr, "http_proxy needs to be ads:port\n");
return NULL;
}
*p = '\0';
- this->http_proxy_port = atoi(p + 1);
+ context->http_proxy_port = atoi(p + 1);
fprintf(stderr, "Using proxy %s:%u\n",
- this->http_proxy_address,
- this->http_proxy_port);
+ context->http_proxy_address,
+ context->http_proxy_port);
}
if (port) {
#ifdef LWS_OPENSSL_SUPPORT
- this->use_ssl = ssl_cert_filepath != NULL &&
+ context->use_ssl = ssl_cert_filepath != NULL &&
ssl_private_key_filepath != NULL;
- if (this->use_ssl)
+ if (context->use_ssl)
fprintf(stderr, " Compiled with SSL support, "
"using it\n");
else
}
/* ignore SIGPIPE */
-
+#ifdef WIN32
+#else
signal(SIGPIPE, sigpipe_handler);
+#endif
#ifdef LWS_OPENSSL_SUPPORT
OpenSSL_add_all_algorithms();
SSL_load_error_strings();
+ openssl_websocket_private_data_index =
+ SSL_get_ex_new_index(0, "libwebsockets", NULL, NULL, NULL);
+
/*
* Firefox insists on SSLv23 not SSLv3
* Konq disables SSLv2 by default now, SSLv23 works
ERR_error_string(ERR_get_error(), ssl_err_buf));
return NULL;
}
- this->ssl_ctx = SSL_CTX_new(method); /* create context */
- if (!this->ssl_ctx) {
+ context->ssl_ctx = SSL_CTX_new(method); /* create context */
+ if (!context->ssl_ctx) {
fprintf(stderr, "problem creating ssl context: %s\n",
ERR_error_string(ERR_get_error(), ssl_err_buf));
return NULL;
}
/* client context */
+ if (port == CONTEXT_PORT_NO_LISTEN)
+ {
+ method = (SSL_METHOD *)SSLv23_client_method();
+ if (!method) {
+ fprintf(stderr, "problem creating ssl method: %s\n",
+ ERR_error_string(ERR_get_error(), ssl_err_buf));
+ return NULL;
+ }
+ /* create context */
+ context->ssl_client_ctx = SSL_CTX_new(method);
+ if (!context->ssl_client_ctx) {
+ fprintf(stderr, "problem creating ssl context: %s\n",
+ ERR_error_string(ERR_get_error(), ssl_err_buf));
+ return NULL;
+ }
- method = (SSL_METHOD *)SSLv23_client_method();
- if (!method) {
- fprintf(stderr, "problem creating ssl method: %s\n",
- ERR_error_string(ERR_get_error(), ssl_err_buf));
- return NULL;
- }
- this->ssl_client_ctx = SSL_CTX_new(method); /* create context */
- if (!this->ssl_client_ctx) {
- fprintf(stderr, "problem creating ssl context: %s\n",
- ERR_error_string(ERR_get_error(), ssl_err_buf));
- return NULL;
+ /* openssl init for cert verification (for client sockets) */
+
+ if (!SSL_CTX_load_verify_locations(
+ context->ssl_client_ctx, NULL,
+ LWS_OPENSSL_CLIENT_CERTS))
+ fprintf(stderr,
+ "Unable to load SSL Client certs from %s "
+ "(set by --with-client-cert-dir= in configure) -- "
+ " client ssl isn't going to work",
+ LWS_OPENSSL_CLIENT_CERTS);
+
+ /*
+ * callback allowing user code to load extra verification certs
+ * helping the client to verify server identity
+ */
+
+ context->protocols[0].callback(context, NULL,
+ LWS_CALLBACK_OPENSSL_LOAD_EXTRA_CLIENT_VERIFY_CERTS,
+ context->ssl_client_ctx, NULL, 0);
}
+ /* as a server, are we requiring clients to identify themselves? */
+ if (options & LWS_SERVER_OPTION_REQUIRE_VALID_OPENSSL_CLIENT_CERT) {
- /* openssl init for cert verification (used with client sockets) */
+ /* absolutely require the client cert */
+
+ SSL_CTX_set_verify(context->ssl_ctx,
+ SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT,
+ OpenSSL_verify_callback);
- if (!SSL_CTX_load_verify_locations(this->ssl_client_ctx, NULL,
- LWS_OPENSSL_CLIENT_CERTS)) {
- fprintf(stderr, "Unable to load SSL Client certs from %s "
- "(set by --with-client-cert-dir= in configure) -- "
- " client ssl isn't going to work",
- LWS_OPENSSL_CLIENT_CERTS);
+ /*
+ * give user code a chance to load certs into the server
+ * allowing it to verify incoming client certs
+ */
+
+ context->protocols[0].callback(context, NULL,
+ LWS_CALLBACK_OPENSSL_LOAD_EXTRA_SERVER_VERIFY_CERTS,
+ context->ssl_ctx, NULL, 0);
}
- if (this->use_ssl) {
+ if (context->use_ssl) {
/* openssl init for server sockets */
/* set the local certificate from CertFile */
- n = SSL_CTX_use_certificate_file(this->ssl_ctx,
+ n = SSL_CTX_use_certificate_file(context->ssl_ctx,
ssl_cert_filepath, SSL_FILETYPE_PEM);
if (n != 1) {
fprintf(stderr, "problem getting cert '%s': %s\n",
return NULL;
}
/* set the private key from KeyFile */
- if (SSL_CTX_use_PrivateKey_file(this->ssl_ctx,
- ssl_private_key_filepath,
- SSL_FILETYPE_PEM) != 1) {
+ if (SSL_CTX_use_PrivateKey_file(context->ssl_ctx,
+ ssl_private_key_filepath, SSL_FILETYPE_PEM) != 1) {
fprintf(stderr, "ssl problem getting key '%s': %s\n",
ssl_private_key_filepath,
ERR_error_string(ERR_get_error(), ssl_err_buf));
return NULL;
}
/* verify private key */
- if (!SSL_CTX_check_private_key(this->ssl_ctx)) {
+ if (!SSL_CTX_check_private_key(context->ssl_ctx)) {
fprintf(stderr, "Private SSL key doesn't match cert\n");
return NULL;
}
/* fd hashtable init */
for (n = 0; n < FD_HASHTABLE_MODULUS; n++)
- this->fd_hashtable[n].length = 0;
+ context->fd_hashtable[n].length = 0;
/* set up our external listening socket we serve on */
}
/* allow us to restart even if old sockets in TIME_WAIT */
- setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));
+ setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, (const void *)&opt, sizeof(opt));
+
+
+ /* Disable Nagle */
+ opt = 1;
+ setsockopt(sockfd, IPPROTO_TCP, TCP_NODELAY, (const void *)&opt, sizeof(opt));
bzero((char *) &serv_addr, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
- serv_addr.sin_addr.s_addr = INADDR_ANY;
+ if (interf == NULL)
+ serv_addr.sin_addr.s_addr = INADDR_ANY;
+ else
+ interface_to_sa(interf, &serv_addr,
+ sizeof(serv_addr));
serv_addr.sin_port = htons(port);
n = bind(sockfd, (struct sockaddr *) &serv_addr,
wsi = malloc(sizeof(struct libwebsocket));
memset(wsi, 0, sizeof (struct libwebsocket));
wsi->sock = sockfd;
+ wsi->count_active_extensions = 0;
wsi->mode = LWS_CONNMODE_SERVER_LISTENER;
- insert_wsi(this, wsi);
+ insert_wsi(context, wsi);
listen(sockfd, 5);
fprintf(stderr, " Listening on port %d\n", port);
/* list in the internal poll array */
- this->fds[this->fds_count].fd = sockfd;
- this->fds[this->fds_count++].events = POLLIN;
+ context->fds[context->fds_count].fd = sockfd;
+ context->fds[context->fds_count++].events = POLLIN;
/* external POLL support via protocol 0 */
- this->protocols[0].callback(wsi,
+ context->protocols[0].callback(context, wsi,
LWS_CALLBACK_ADD_POLL_FD,
(void *)(long)sockfd, NULL, POLLIN);
}
/* drop any root privs for this process */
-
+#ifdef WIN32
+#else
if (gid != -1)
if (setgid(gid))
fprintf(stderr, "setgid: %s\n", strerror(errno));
if (uid != -1)
if (setuid(uid))
fprintf(stderr, "setuid: %s\n", strerror(errno));
-
+#endif
/* set up our internal broadcast trigger sockets per-protocol */
- for (this->count_protocols = 0;
- protocols[this->count_protocols].callback;
- this->count_protocols++) {
- protocols[this->count_protocols].owning_server = this;
- protocols[this->count_protocols].protocol_index =
- this->count_protocols;
+ for (context->count_protocols = 0;
+ protocols[context->count_protocols].callback;
+ context->count_protocols++) {
+
+ fprintf(stderr, " Protocol: %s\n", protocols[context->count_protocols].name);
+
+ protocols[context->count_protocols].owning_server = context;
+ protocols[context->count_protocols].protocol_index =
+ context->count_protocols;
fd = socket(AF_INET, SOCK_STREAM, 0);
if (fd < 0) {
}
/* allow us to restart even if old sockets in TIME_WAIT */
- setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));
+ setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const void *)&opt, sizeof(opt));
bzero((char *) &serv_addr, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
fprintf(stderr, "getsockname failed\n");
return NULL;
}
- protocols[this->count_protocols].broadcast_socket_port =
+ protocols[context->count_protocols].broadcast_socket_port =
ntohs(cli_addr.sin_port);
listen(fd, 5);
debug(" Protocol %s broadcast socket %d\n",
- protocols[this->count_protocols].name,
+ protocols[context->count_protocols].name,
ntohs(cli_addr.sin_port));
/* dummy wsi per broadcast proxy socket */
memset(wsi, 0, sizeof (struct libwebsocket));
wsi->sock = fd;
wsi->mode = LWS_CONNMODE_BROADCAST_PROXY_LISTENER;
+ wsi->count_active_extensions = 0;
/* note which protocol we are proxying */
- wsi->protocol_index_for_broadcast_proxy = this->count_protocols;
- insert_wsi(this, wsi);
+ wsi->protocol_index_for_broadcast_proxy =
+ context->count_protocols;
+ insert_wsi(context, wsi);
/* list in internal poll array */
- this->fds[this->fds_count].fd = fd;
- this->fds[this->fds_count].events = POLLIN;
- this->fds[this->fds_count].revents = 0;
- this->fds_count++;
+ context->fds[context->fds_count].fd = fd;
+ context->fds[context->fds_count].events = POLLIN;
+ context->fds[context->fds_count].revents = 0;
+ context->fds_count++;
/* external POLL support via protocol 0 */
- this->protocols[0].callback(wsi,
+ context->protocols[0].callback(context, wsi,
LWS_CALLBACK_ADD_POLL_FD,
(void *)(long)fd, NULL, POLLIN);
}
- return this;
+ /*
+ * give all extensions a chance to create any per-context
+ * allocations they need
+ */
+
+ m = LWS_EXT_CALLBACK_CLIENT_CONTEXT_CONSTRUCT;
+ if (port)
+ m = LWS_EXT_CALLBACK_SERVER_CONTEXT_CONSTRUCT;
+ while (extensions->callback) {
+ fprintf(stderr, " Extension: %s\n", extensions->name);
+ extensions->callback(context, extensions,
+ NULL, m, NULL, NULL, 0);
+ extensions++;
+ }
+
+ return context;
}
* have to make sure you are calling
* libwebsocket_service periodically to service
* the websocket traffic
- * @this: server context returned by creation function
+ * @context: server context returned by creation function
*/
int
-libwebsockets_fork_service_loop(struct libwebsocket_context *this)
+libwebsockets_fork_service_loop(struct libwebsocket_context *context)
{
int fd;
struct sockaddr_in cli_addr;
* service process context
*/
- for (p = 0; p < this->count_protocols; p++) {
+ for (p = 0; p < context->count_protocols; p++) {
fd = socket(AF_INET, SOCK_STREAM, 0);
if (fd < 0) {
fprintf(stderr, "Unable to create socket\n");
}
cli_addr.sin_family = AF_INET;
cli_addr.sin_port = htons(
- this->protocols[p].broadcast_socket_port);
+ context->protocols[p].broadcast_socket_port);
cli_addr.sin_addr.s_addr = inet_addr("127.0.0.1");
n = connect(fd, (struct sockaddr *)&cli_addr,
sizeof cli_addr);
return -1;
}
- this->protocols[p].broadcast_socket_user_fd = fd;
+ context->protocols[p].broadcast_socket_user_fd = fd;
}
return 0;
/* in this forked process, sit and service websocket connections */
while (1)
- if (libwebsocket_service(this, 1000))
+ if (libwebsocket_service(context, 1000))
return -1;
return 0;
libwebsockets_broadcast(const struct libwebsocket_protocols *protocol,
unsigned char *buf, size_t len)
{
- struct libwebsocket_context *this = protocol->owning_server;
+ struct libwebsocket_context *context = protocol->owning_server;
int n;
int m;
struct libwebsocket * wsi;
for (n = 0; n < FD_HASHTABLE_MODULUS; n++) {
- for (m = 0; m < this->fd_hashtable[n].length; m++) {
+ for (m = 0; m < context->fd_hashtable[n].length; m++) {
- wsi = this->fd_hashtable[n].wsi[m];
+ wsi = context->fd_hashtable[n].wsi[m];
if (wsi->mode != LWS_CONNMODE_WS_SERVING)
continue;
if (wsi->protocol != protocol)
continue;
- wsi->protocol->callback(wsi,
+ wsi->protocol->callback(context, wsi,
LWS_CALLBACK_BROADCAST,
wsi->user_space,
buf, len);
return n;
}
+
+int
+libwebsocket_is_final_fragment(struct libwebsocket *wsi)
+{
+ return wsi->final;
+}
+
+void *
+libwebsocket_ensure_user_space(struct libwebsocket *wsi)
+{
+ /* allocate the per-connection user memory (if any) */
+
+ if (wsi->protocol->per_session_data_size && !wsi->user_space) {
+ wsi->user_space = malloc(
+ wsi->protocol->per_session_data_size);
+ if (wsi->user_space == NULL) {
+ fprintf(stderr, "Out of memory for "
+ "conn user space\n");
+ return NULL;
+ }
+ memset(wsi->user_space, 0, wsi->protocol->per_session_data_size);
+ }
+ return wsi->user_space;
+}
projects / profile / ivi / libwebsockets.git / blobdiff