* Copyright 2016 IoT.bzh
* Author: José Bollo <jose.bollo@iot.bzh>
*
- * Inspired by the work of
- *
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*/
#define _GNU_SOURCE
-#include <microhttpd.h>
+
+#include <stdlib.h>
#include <assert.h>
#include <errno.h>
-#include <sys/uio.h>
+#include <string.h>
#include <openssl/sha.h>
-#include <openssl/bio.h>
-#include <openssl/evp.h>
-
-#include "websock.h"
+#include <microhttpd.h>
-#include "../include/local-def.h"
+#include "afb-ws-json.h"
#include "afb-method.h"
#include "afb-hreq.h"
+#include "afb-websock.h"
+
+/**************** WebSocket connection upgrade ****************************/
static const char websocket_s[] = "websocket";
static const char sec_websocket_key_s[] = "Sec-WebSocket-Key";
static const char sec_websocket_protocol_s[] = "Sec-WebSocket-Protocol";
static const char websocket_guid[] = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
-
-struct afb_websock
-{
- int fd;
- struct MHD_Connection *connection;
- struct websock *ws;
-};
-
-static ssize_t afb_websock_writev(struct afb_websock *ws, const struct iovec *iov, int iovcnt)
-{
- ssize_t rc;
- do {
- rc = writev(ws->fd, iov, iovcnt);
- } while(rc == -1 && errno == EINTR);
- return rc;
-}
-
-static ssize_t afb_websock_readv(struct afb_websock *ws, const struct iovec *iov, int iovcnt)
-{
- ssize_t rc;
- do {
- rc = readv(ws->fd, iov, iovcnt);
- } while(rc == -1 && errno == EINTR);
- return rc;
-}
-
-static void afb_websock_disconnect(struct afb_websock *ws)
-{
-}
-
-static void afb_websock_on_close(struct afb_websock *ws, uint16_t code, size_t size)
-{
-}
-
-static void afb_websock_on_content(struct afb_websock *ws, int last, size_t size)
-{
-}
-
-static struct websock_itf afb_websock_itf = {
- .writev = (void*)afb_websock_writev,
- .readv = (void*)afb_websock_readv,
- .disconnect = (void*)afb_websock_disconnect,
-
- .on_ping = NULL,
- .on_pong = NULL,
- .on_close = (void*)afb_websock_on_close,
- .on_text = (void*)afb_websock_on_content,
- .on_binary = (void*)afb_websock_on_content,
- .on_continue = (void*)afb_websock_on_content
-};
-
static void enc64(unsigned char *in, char *out)
{
static const char tob64[] =
result[28] = 0;
}
+static const char vseparators[] = " \t,";
+
static int headerhas(const char *header, const char *needle)
{
- static const char sep[] = " \t,";
size_t len, n;
n = strlen(needle);
for(;;) {
- header += strspn(header, sep);
+ header += strspn(header, vseparators);
if (!*header)
return 0;
- len = strcspn(header, sep);
+ len = strcspn(header, vseparators);
if (n == len && 0 == strncasecmp(needle, header, n))
return 1;
header += len;
}
}
-int afb_websock_check(struct afb_hreq *hreq, int *later)
+struct protodef
+{
+ const char *name;
+ void *(*create)(int fd, struct AFB_clientCtx *context, void (*cleanup)(void*), void *closure);
+};
+
+static const struct protodef protodefs[] = {
+ { "x-afb-ws-json1", (void*)afb_ws_json_create },
+ { NULL, NULL }
+};
+
+static const struct protodef *search_proto(const char *protocols)
+{
+ int i;
+ size_t len;
+
+ for(;;) {
+ protocols += strspn(protocols, vseparators);
+ if (!*protocols)
+ return NULL;
+ len = strcspn(protocols, vseparators);
+ for (i = 0 ; protodefs[i].name != NULL ; i++)
+ if (!strncasecmp(protodefs[i].name, protocols, len)
+ && !protodefs[i].name[len])
+ return &protodefs[i];
+ protocols += len;
+ }
+}
+
+int afb_websock_check_upgrade(struct afb_hreq *hreq)
{
const char *connection, *upgrade, *key, *version, *protocols;
char acceptval[29];
int vernum;
struct MHD_Response *response;
+ const struct protodef *proto;
+ void *ws;
/* is an upgrade to websocket ? */
upgrade = afb_hreq_get_header(hreq, MHD_HTTP_HEADER_UPGRADE);
/* is a connection for upgrade ? */
connection = afb_hreq_get_header(hreq, MHD_HTTP_HEADER_CONNECTION);
- if (connection == NULL || !headerhas (connection, MHD_HTTP_HEADER_UPGRADE))
+ if (connection == NULL
+ || !headerhas (connection, MHD_HTTP_HEADER_UPGRADE))
return 0;
/* is a get ? */
- if(hreq->method != afb_method_get || strcasecmp(hreq->version, MHD_HTTP_VERSION_1_1))
+ if (hreq->method != afb_method_get
+ || strcasecmp(hreq->version, MHD_HTTP_VERSION_1_1))
return 0;
/* has a key and a version ? */
/* is a supported version ? */
vernum = atoi(version);
if (vernum != 13) {
- response = MHD_create_response_from_buffer(0, NULL, MHD_RESPMEM_PERSISTENT);
- MHD_add_response_header (response, sec_websocket_version_s, "13");
- MHD_queue_response (hreq->connection, MHD_HTTP_BAD_REQUEST, response);
+ response = MHD_create_response_from_buffer(0, NULL,
+ MHD_RESPMEM_PERSISTENT);
+ MHD_add_response_header (response, sec_websocket_version_s,
+ "13");
+ MHD_queue_response (hreq->connection, MHD_HTTP_BAD_REQUEST,
+ response);
MHD_destroy_response (response);
- *later = 1;
return 1;
}
/* is the protocol supported ? */
protocols = afb_hreq_get_header(hreq, sec_websocket_protocol_s);
+ proto = protocols == NULL ? NULL : search_proto(protocols);
+ if (proto == NULL) {
+ afb_hreq_reply_error(hreq, MHD_HTTP_PRECONDITION_FAILED);
+ return 1;
+ }
+
+ /* create the web socket */
+ /* TODO fullfil ondisconnection and records!!! */
+ ws = proto->create(dup(MHD_get_connection_info(hreq->connection,MHD_CONNECTION_INFO_CONNECTION_FD)->connect_fd),
+ afb_hreq_context(hreq),
+ (void*)MHD_resume_connection,
+ hreq->connection);
+ if (ws == NULL) {
+ afb_hreq_reply_error(hreq, MHD_HTTP_INTERNAL_SERVER_ERROR);
+ return 1;
+ }
/* send the accept connection */
make_accept_value(key, acceptval);
- response = MHD_create_response_from_buffer(0, NULL, MHD_RESPMEM_PERSISTENT);
+ response = MHD_create_response_from_buffer(0, NULL,
+ MHD_RESPMEM_PERSISTENT);
MHD_add_response_header (response, sec_websocket_accept_s, acceptval);
- MHD_add_response_header (response, MHD_HTTP_HEADER_CONNECTION, MHD_HTTP_HEADER_UPGRADE);
- MHD_add_response_header (response, MHD_HTTP_HEADER_UPGRADE, websocket_s);
- MHD_queue_response (hreq->connection, MHD_HTTP_SWITCHING_PROTOCOLS, response);
+ MHD_add_response_header (response, sec_websocket_protocol_s,
+ proto->name);
+ MHD_add_response_header (response, MHD_HTTP_HEADER_CONNECTION,
+ MHD_HTTP_HEADER_UPGRADE);
+ MHD_add_response_header (response, MHD_HTTP_HEADER_UPGRADE,
+ websocket_s);
+ MHD_queue_response (hreq->connection, MHD_HTTP_SWITCHING_PROTOCOLS,
+ response);
MHD_destroy_response (response);
- *later = 0;
+ hreq->upgrade = 1;
return 1;
}
-struct afb_websock *afb_websock_create(struct MHD_Connection *connection)
-{
- struct afb_websock *result;
-
- result = malloc(sizeof * result);
- if (result) {
- result->connection = connection;
- result->fd = MHD_get_connection_info(connection, MHD_CONNECTION_INFO_CONNECTION_FD)->connect_fd;
- result->ws = websock_create(&afb_websock_itf, result);
- if (result->ws == NULL) {
- free(result);
- result = NULL;
- }
- }
- return result;
-}
-
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