/*
- * Copyright (C) 2016, 2017 "IoT.bzh"
+ * Copyright (C) 2016-2019 "IoT.bzh"
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
#include "websock.h"
-#define BLOCK_DATA_SIZE 4096
+#if !defined(WEBSOCKET_DEFAULT_MAXLENGTH)
+# define WEBSOCKET_DEFAULT_MAXLENGTH 1048500 /* 76 less than 1M, probably enougth for headers */
+#endif
#define FRAME_GET_FIN(BYTE) (((BYTE) >> 7) & 0x01)
#define FRAME_GET_RSV1(BYTE) (((BYTE) >> 6) & 0x01)
#define FRAME_SET_RSV3(BYTE) (((BYTE) & 0x01) << 4)
#define FRAME_SET_OPCODE(BYTE) ((BYTE) & 0x0F)
#define FRAME_SET_MASK(BYTE) (((BYTE) & 0x01) << 7)
-#define FRAME_SET_LENGTH(X64, IDX) (unsigned char)(((X64) >> ((IDX)*8)) & 0xFF)
+#define FRAME_SET_LENGTH(X64, IDX) (unsigned char)((sizeof(X64)) <= (IDX) ? 0 : (((X64) >> ((IDX)*8)) & 0xFF))
#define OPCODE_CONTINUATION 0x0
#define OPCODE_TEXT 0x1
#define STATE_LENGTH 2
#define STATE_DATA 3
+static size_t default_maxlength = WEBSOCKET_DEFAULT_MAXLENGTH;
+
struct websock {
int state;
uint64_t maxlength;
return ws->itf->readv(ws->closure, iov, iovcnt);
}
-#if 0
-static ssize_t ws_write(struct websock *ws, const void *buffer, size_t buffer_size)
-{
- struct iovec iov;
- iov.iov_base = (void *)buffer; /* const cast */
- iov.iov_len = buffer_size;
- return ws_writev(ws, &iov, 1);
-}
-#endif
-
static ssize_t ws_read(struct websock *ws, void *buffer, size_t buffer_size)
{
struct iovec iov;
return 1;
}
-int websock_dispatch(struct websock *ws)
+int websock_dispatch(struct websock *ws, int loop)
{
uint16_t code;
loop:
ws->lenhead = 0;
ws->szhead = 2;
ws->state = STATE_START;
+ /*@fallthrough@*/
case STATE_START:
/* read the header */
switch (FRAME_GET_PAYLOAD_LEN(ws->header[1])) {
case 127:
ws->szhead += 6;
+ /*@fallthrough@*/
case 126:
ws->szhead += 2;
+ /*@fallthrough@*/
default:
ws->szhead += 4 * FRAME_GET_MASK(ws->header[1]);
}
ws->state = STATE_LENGTH;
+ /*@fallthrough@*/
case STATE_LENGTH:
/* continue to read the header */
ws->itf->on_continue(ws->closure,
FRAME_GET_FIN(ws->header[0]),
(size_t) ws->length);
+ if (!loop)
+ return 0;
break;
case OPCODE_TEXT:
ws->itf->on_text(ws->closure,
FRAME_GET_FIN(ws->header[0]),
(size_t) ws->length);
+ if (!loop)
+ return 0;
break;
case OPCODE_BINARY:
ws->itf->on_binary(ws->closure,
FRAME_GET_FIN(ws->header[0]),
(size_t) ws->length);
+ if (!loop)
+ return 0;
break;
case OPCODE_CLOSE:
if (ws->length == 0)
websock_pong(ws, NULL, 0);
}
ws->state = STATE_INIT;
+ if (!loop)
+ return 0;
break;
case OPCODE_PONG:
if (ws->itf->on_pong)
else
websock_drop(ws);
ws->state = STATE_INIT;
+ if (!loop)
+ return 0;
break;
default:
goto protocol_error;
if (result) {
result->itf = itf;
result->closure = closure;
- result->maxlength = 65000;
+ result->maxlength = default_maxlength;
}
return result;
}
{
free(ws);
}
+
+void websock_set_default_max_length(size_t maxlen)
+{
+ default_maxlength = maxlen;
+}
+
+void websock_set_max_length(struct websock *ws, size_t maxlen)
+{
+ ws->maxlength = (uint64_t)maxlen;
+}
+
+const char *websocket_explain_error(uint16_t code)
+{
+ static const char *msgs[] = {
+ "OK", /* 1000 */
+ "GOING_AWAY", /* 1001 */
+ "PROTOCOL_ERROR", /* 1002 */
+ "CANT_ACCEPT", /* 1003 */
+ "RESERVED", /* 1004 */
+ "NOT_SET", /* 1005 */
+ "ABNORMAL", /* 1006 */
+ "INVALID_UTF8", /* 1007 */
+ "POLICY_VIOLATION", /* 1008 */
+ "MESSAGE_TOO_LARGE", /* 1009 */
+ "EXPECT_EXTENSION", /* 1010 */
+ "INTERNAL_ERROR", /* 1011 */
+ };
+ if (code < 1000 || (code - 1000) >= (sizeof msgs / sizeof *msgs))
+ return "?";
+ return msgs[code - 1000];
+}