90 lines
2.3 KiB
C
90 lines
2.3 KiB
C
#ifndef HV_WS_DEF_H_
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#define HV_WS_DEF_H_
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#include "hexport.h"
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#include <stdbool.h>
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#include <stdlib.h> // import rand
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#define SEC_WEBSOCKET_VERSION "Sec-WebSocket-Version"
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#define SEC_WEBSOCKET_KEY "Sec-WebSocket-Key"
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#define SEC_WEBSOCKET_ACCEPT "Sec-WebSocket-Accept"
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#define SEC_WEBSOCKET_PROTOCOL "Sec-WebSocket-Protocol"
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#define SEC_WEBSOCKET_EXTENSIONS "Sec-WebSocket-Extensions"
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#define WS_SERVER_MIN_FRAME_SIZE 2
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// 1000 1001 0000 0000
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#define WS_SERVER_PING_FRAME "\211\0"
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// 1000 1010 0000 0000
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#define WS_SERVER_PONG_FRAME "\212\0"
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#define WS_CLIENT_MIN_FRAME_SIZE 6
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// 1000 1001 1000 0000
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#define WS_CLIENT_PING_FRAME "\211\200WSWS"
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// 1000 1010 1000 0000
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#define WS_CLIENT_PONG_FRAME "\212\200WSWS"
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enum ws_session_type {
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WS_CLIENT,
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WS_SERVER,
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};
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enum ws_opcode {
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WS_OPCODE_CONTINUE = 0x0,
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WS_OPCODE_TEXT = 0x1,
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WS_OPCODE_BINARY = 0x2,
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WS_OPCODE_CLOSE = 0x8,
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WS_OPCODE_PING = 0x9,
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WS_OPCODE_PONG = 0xA,
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};
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BEGIN_EXTERN_C
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// Sec-WebSocket-Key => Sec-WebSocket-Accept
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HV_EXPORT void ws_encode_key(const char* key, char accept[]);
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// fix-header[2] + var-length[2/8] + mask[4] + data[data_len]
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HV_EXPORT int ws_calc_frame_size(int data_len, bool has_mask DEFAULT(false));
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HV_EXPORT int ws_build_frame(
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char* out,
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const char* data,
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int data_len,
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const char mask[4],
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bool has_mask DEFAULT(false),
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enum ws_opcode opcode DEFAULT(WS_OPCODE_TEXT),
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bool fin DEFAULT(true));
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HV_INLINE int ws_client_build_frame(
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char* out,
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const char* data,
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int data_len,
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/* const char mask[4] */
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/* bool has_mask = true */
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enum ws_opcode opcode DEFAULT(WS_OPCODE_TEXT),
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bool fin DEFAULT(true)) {
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char mask[4] = {0};
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int i = 0;
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int imask = rand();
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for (i = 0; i < 4; i++) {
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mask[i] = (imask >> (8 * i)) & 0xff;
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}
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return ws_build_frame(out, data, data_len, mask, true, opcode, fin);
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}
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HV_INLINE int ws_server_build_frame(
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char* out,
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const char* data,
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int data_len,
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/* const char mask[4] */
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/* bool has_mask = false */
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enum ws_opcode opcode DEFAULT(WS_OPCODE_TEXT),
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bool fin DEFAULT(true)) {
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char mask[4] = {0};
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return ws_build_frame(out, data, data_len, mask, false, opcode, fin);
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}
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END_EXTERN_C
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#endif // HV_WS_DEF_H_
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