X-Git-Url: https://gerrit.automotivelinux.org/gerrit/gitweb?a=blobdiff_plain;f=src%2Fafb-websock.c;h=df835d69313b8f30c47ec2c95798527fdf2c67b1;hb=65353dce81a629e042800bb7b86fcd869a76727e;hp=1c087e25fc79bf84b960b7712819a8fb0e2a2203;hpb=3259015486ecc8e246b1b69b36235d24e9d9c2ea;p=src%2Fapp-framework-binder.git diff --git a/src/afb-websock.c b/src/afb-websock.c index 1c087e25..df835d69 100644 --- a/src/afb-websock.c +++ b/src/afb-websock.c @@ -1,9 +1,7 @@ /* - * Copyright 2016 IoT.bzh + * Copyright (C) 2015-2020 "IoT.bzh" * Author: José Bollo * - * 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 @@ -18,21 +16,24 @@ */ #define _GNU_SOURCE -#include + +#include #include #include -#include +#include #include -#include -#include - -#include "websock.h" - -#include "../include/local-def.h" +#include #include "afb-method.h" +#include "afb-context.h" #include "afb-hreq.h" +#include "afb-websock.h" +#include "afb-ws-json1.h" +#include "afb-fdev.h" +#include "fdev.h" + +/**************** WebSocket connection upgrade ****************************/ static const char websocket_s[] = "websocket"; static const char sec_websocket_key_s[] = "Sec-WebSocket-Key"; @@ -41,57 +42,6 @@ static const char sec_websocket_accept_s[] = "Sec-WebSocket-Accept"; 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[] = @@ -125,92 +75,183 @@ static void make_accept_value(const char *key, char result[29]) 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); -printf("!!!%.*s!!!\n",len,header); + 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)(struct fdev *fdev, struct afb_apiset *apiset, struct afb_context *context, void (*cleanup)(void*), void *cleanup_closure); +}; + +static const struct protodef *search_proto(const struct protodef *protodefs, const char *protocols) +{ + int i; + size_t len; + + if (protocols == NULL) { + /* return NULL; */ + return protodefs != NULL && protodefs->name != NULL ? protodefs : NULL; + } + 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; + } +} + +struct memo_websocket { + const struct protodef *proto; + struct afb_hreq *hreq; + struct afb_apiset *apiset; +}; + +static void close_websocket(void *closure) +{ + struct MHD_UpgradeResponseHandle *urh = closure; + MHD_upgrade_action (urh, MHD_UPGRADE_ACTION_CLOSE); +} + +static void upgrade_to_websocket( + void *cls, + struct MHD_Connection *connection, + void *con_cls, + const char *extra_in, + size_t extra_in_size, + MHD_socket sock, + struct MHD_UpgradeResponseHandle *urh) +{ + struct memo_websocket *memo = cls; + void *ws; + struct fdev *fdev; + + fdev = afb_fdev_create(sock); + if (!fdev) { + /* TODO */ + close_websocket(urh); + } else { + fdev_set_autoclose(fdev, 0); + ws = memo->proto->create(fdev, memo->apiset, &memo->hreq->xreq.context, close_websocket, urh); + if (ws == NULL) { + /* TODO */ + close_websocket(urh); + } + } +#if MHD_VERSION <= 0x00095900 + afb_hreq_unref(memo->hreq); +#endif + free(memo); +} + +static int check_websocket_upgrade(struct MHD_Connection *con, const struct protodef *protodefs, struct afb_hreq *hreq, struct afb_apiset *apiset) +{ + struct memo_websocket *memo; + struct MHD_Response *response; const char *connection, *upgrade, *key, *version, *protocols; char acceptval[29]; int vernum; - struct MHD_Response *response; + const struct protodef *proto; /* is an upgrade to websocket ? */ - upgrade = afb_hreq_get_header(hreq, MHD_HTTP_HEADER_UPGRADE); + upgrade = MHD_lookup_connection_value(con, MHD_HEADER_KIND, MHD_HTTP_HEADER_UPGRADE); if (upgrade == NULL || strcasecmp(upgrade, websocket_s)) return 0; /* is a connection for upgrade ? */ - connection = afb_hreq_get_header(hreq, MHD_HTTP_HEADER_CONNECTION); - 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)) + connection = MHD_lookup_connection_value(con, MHD_HEADER_KIND, MHD_HTTP_HEADER_CONNECTION); + if (connection == NULL + || !headerhas (connection, MHD_HTTP_HEADER_UPGRADE)) return 0; /* has a key and a version ? */ - key = afb_hreq_get_header(hreq, sec_websocket_key_s); - version = afb_hreq_get_header(hreq, sec_websocket_version_s); + key = MHD_lookup_connection_value(con, MHD_HEADER_KIND, sec_websocket_key_s); + version = MHD_lookup_connection_value(con, MHD_HEADER_KIND, sec_websocket_version_s); if (key == NULL || version == NULL) return 0; /* is a supported version ? */ vernum = atoi(version); if (vernum != 13) { - response = MHD_create_response_from_data(0,NULL,0,0); - 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; + response = MHD_create_response_from_buffer(0, NULL, MHD_RESPMEM_PERSISTENT); + MHD_add_response_header(response, sec_websocket_version_s, "13"); + MHD_queue_response(con, MHD_HTTP_UPGRADE_REQUIRED, response); + MHD_destroy_response(response); return 1; } /* is the protocol supported ? */ - protocols = afb_hreq_get_header(hreq, sec_websocket_protocol_s); + protocols = MHD_lookup_connection_value(con, MHD_HEADER_KIND, sec_websocket_protocol_s); + proto = search_proto(protodefs, protocols); + if (proto == NULL) { + response = MHD_create_response_from_buffer(0, NULL, MHD_RESPMEM_PERSISTENT); + MHD_queue_response(con, MHD_HTTP_PRECONDITION_FAILED, response); + MHD_destroy_response(response); + return 1; + } + + /* record context */ + memo = malloc(sizeof *memo); + if (memo == NULL) { + response = MHD_create_response_from_buffer(0, NULL, MHD_RESPMEM_PERSISTENT); + MHD_queue_response(con, MHD_HTTP_INTERNAL_SERVER_ERROR, response); + MHD_destroy_response(response); + return 1; + } + memo->proto = proto; + memo->hreq = hreq; + memo->apiset = apiset; /* send the accept connection */ + response = MHD_create_response_for_upgrade(upgrade_to_websocket, memo); make_accept_value(key, acceptval); - response = MHD_create_response_from_data(0,NULL,0,0); - 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_destroy_response (response); - - *later = 0; + MHD_add_response_header(response, sec_websocket_accept_s, acceptval); + MHD_add_response_header(response, sec_websocket_protocol_s, proto->name); + MHD_add_response_header(response, MHD_HTTP_HEADER_UPGRADE, websocket_s); + MHD_queue_response(con, MHD_HTTP_SWITCHING_PROTOCOLS, response); + MHD_destroy_response(response); + return 1; } -struct afb_websock *afb_websock_create(struct MHD_Connection *connection) +static const struct protodef protodefs[] = { + { "x-afb-ws-json1", (void*)afb_ws_json1_create }, + { NULL, NULL } +}; + +int afb_websock_check_upgrade(struct afb_hreq *hreq, struct afb_apiset *apiset) { - 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; - } + int rc; + + /* is a get ? */ + if (hreq->method != afb_method_get + || strcasecmp(hreq->version, MHD_HTTP_VERSION_1_1)) + return 0; + + rc = check_websocket_upgrade(hreq->connection, protodefs, hreq, apiset); + if (rc == 1) { + hreq->replied = 1; } - return result; + return rc; }