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Added comments to read_websocket(), per morgan3d pull request

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Sergey Lyubka 2013-07-12 11:55:52 +01:00
parent 460738f11b
commit 70ce6c5ad3
1 changed files with 13 additions and 0 deletions
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mongoose.c
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@ -3987,14 +3987,27 @@ static void send_websocket_handshake(struct mg_connection *conn) {
}
static void read_websocket(struct mg_connection *conn) {
// Pointer to the beginning of the portion of the incoming websocket message
// queue. The original websocket upgrade request is never removed,
// so the queue begins after it.
unsigned char *buf = (unsigned char *) conn->buf + conn->request_len;
int bits, n, stop = 0;
size_t i, len, mask_len, data_len, header_len, body_len;
// data points to the place where the message is stored when passed to the
// websocket_data callback. This is either mem on the stack,
// or a dynamically allocated buffer if it is too large.
char mem[4 * 1024], mask[4], *data;
assert(conn->content_len == 0);
// Loop continuously, reading messages from the socket, invoking the callback,
// and waiting repeatedly until an error occurs.
while (!stop) {
header_len = 0;
// body_len is the length of the entire queue in bytes
// len is the length of the current message
// data_len is the length of the current message's data payload
// header_len is the length of the current message's header
if ((body_len = conn->data_len - conn->request_len) >= 2) {
len = buf[1] & 127;
mask_len = buf[1] & 128 ? 4 : 0;