WebSocket实现原理

payload_size &= 0xffff;

} else if (payload_len_bits == 127) {

payload_size &= 0xffffffffffffffffLL;

}

for (i = 0; i

*(buf_offset + i) = *((char *)&payload_size + (extend_payload_len_bits - i - 1));

}

/**

* according to https://tools.ietf.org/html/rfc6455#section-5.3

* buf_offset is set to mask bit

buf_offset = data + payload_bit_offset - 4;

for (i = 0; i 4; i++) {

*(buf_offset + i) = mask[i] & 0xff;

}

/**

* mask the payload data

buf_offset = data + payload_bit_offset;

memcpy(buf_offset, payload, payload_size);

mask_payload(mask, buf_offset, payload_size);

}

void mask_payload(char mask[4], char *payload, unsigned long long payload_size) {

unsigned long long i;

for(i = 0; i

*(payload + i) ^= mask[i % 4] & 0xff;

}

int ws_recv(websocket_t *ws) { 
 
if (ws->state 
 
return ws_do_handshake(ws); 
 
} 
 
  
 
int ret; 
 
while(true) { 
 
	
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