mirror of
https://github.com/warmcat/libwebsockets.git
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8c6aaa2b43
This also changes the wsi_children array to be indexed by subchannel - 2, non-existent channels are NULL in there and highest_child_subchannel is a highwater mark for the highest subchannel ever used. That way we can immediately get the wsi for a subchannel at the cost of some extra sparse skipping during management. This also takes care of scanning for empty slots on allocation and NULLing on close of subchannel instead of deletion. Signed-off-by: Andy Green <andy@warmcat.com>
94 lines
2.3 KiB
C
94 lines
2.3 KiB
C
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#if 0
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#ifdef WIN32
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static
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#else
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static inline
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#endif
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void muxdebug(const char *format, ...)
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{
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va_list ap;
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va_start(ap, format); vfprintf(stderr, format, ap); va_end(ap);
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}
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#else
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#ifdef WIN32
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static
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#else
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static inline
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#endif
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void muxdebug(const char *format, ...)
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{
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}
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#endif
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#define MAX_XGM_SUBCHANNELS 8192
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enum lws_ext_x_google_mux__parser_states {
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LWS_EXT_XGM_STATE__MUX_BLOCK_1,
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LWS_EXT_XGM_STATE__MUX_BLOCK_2,
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LWS_EXT_XGM_STATE__MUX_BLOCK_3,
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LWS_EXT_XGM_STATE__ADDCHANNEL_LEN,
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LWS_EXT_XGM_STATE__ADDCHANNEL_LEN16_1,
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LWS_EXT_XGM_STATE__ADDCHANNEL_LEN16_2,
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LWS_EXT_XGM_STATE__ADDCHANNEL_LEN32_1,
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LWS_EXT_XGM_STATE__ADDCHANNEL_LEN32_2,
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LWS_EXT_XGM_STATE__ADDCHANNEL_LEN32_3,
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LWS_EXT_XGM_STATE__ADDCHANNEL_LEN32_4,
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LWS_EXT_XGM_STATE__ADDCHANNEL_HEADERS,
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LWS_EXT_XGM_STATE__FLOWCONTROL_1,
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LWS_EXT_XGM_STATE__FLOWCONTROL_2,
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LWS_EXT_XGM_STATE__FLOWCONTROL_3,
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LWS_EXT_XGM_STATE__FLOWCONTROL_4,
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LWS_EXT_XGM_STATE__DATA,
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};
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enum lws_ext_x_goole_mux__mux_opcodes {
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LWS_EXT_XGM_OPC__DATA,
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LWS_EXT_XGM_OPC__ADDCHANNEL,
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LWS_EXT_XGM_OPC__DROPCHANNEL,
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LWS_EXT_XGM_OPC__FLOWCONTROL,
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LWS_EXT_XGM_OPC__RESERVED_4,
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LWS_EXT_XGM_OPC__RESERVED_5,
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LWS_EXT_XGM_OPC__RESERVED_6,
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LWS_EXT_XGM_OPC__RESERVED_7,
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};
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/* one of these per context (server or client) */
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struct lws_ext_x_google_mux_context {
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/*
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* these are listing physical connections, not children sharing a
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* parent mux physical connection
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*/
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struct libwebsocket *wsi_muxconns[MAX_CLIENTS];
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/*
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* when this is < 2, we do not do any mux blocks
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* just pure websockets
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*/
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int active_conns;
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};
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/* one of these per connection (server or client) */
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struct lws_ext_x_google_mux_conn {
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enum lws_ext_x_goole_mux__mux_opcodes block_subopcode;
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int block_subchannel;
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unsigned int length;
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enum lws_ext_x_google_mux__parser_states state;
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/* child points to the mux wsi using this */
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struct libwebsocket *wsi_parent;
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int subchannel;
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struct libwebsocket *wsi_children[MAX_CLIENTS];
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int highest_child_subchannel;
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char awaiting_POLLOUT;
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int count_children_needing_POLLOUT;
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int sticky_mux_used;
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int defeat_mux_opcode_wrapping;
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};
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extern int
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lws_extension_callback_x_google_mux(struct libwebsocket_context *context,
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struct libwebsocket_extension *ext,
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struct libwebsocket *wsi,
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enum libwebsocket_extension_callback_reasons reason,
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void *user, void *in, size_t len);
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