#include <sys/uio.h>
#include <string.h>
+#include <json.h>
+
#include <openssl/sha.h>
+/*
#include <openssl/bio.h>
#include <openssl/evp.h>
+*/
#include "websock.h"
#include "local-def.h"
+#include "afb-req-itf.h"
#include "afb-method.h"
#include "afb-hreq.h"
+#include "afb-websock.h"
+#include "afb-apis.h"
+#include "session.h"
+#include "utils-upoll.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[] =
return 1;
}
-struct afb_websock *afb_websock_create(struct MHD_Connection *connection)
+/**************** WebSocket handling ****************************/
+
+static ssize_t aws_writev(struct afb_websock *ws, const struct iovec *iov, int iovcnt);
+static ssize_t aws_readv(struct afb_websock *ws, const struct iovec *iov, int iovcnt);
+static void aws_disconnect(struct afb_websock *ws);
+static void aws_on_close(struct afb_websock *ws, uint16_t code, size_t size);
+static void aws_on_content(struct afb_websock *ws, int last, size_t size);
+static void aws_on_readable(struct afb_websock *ws);
+
+static struct websock_itf aws_itf = {
+ .writev = (void*)aws_writev,
+ .readv = (void*)aws_readv,
+ .disconnect = (void*)aws_disconnect,
+
+ .on_ping = NULL,
+ .on_pong = NULL,
+ .on_close = (void*)aws_on_close,
+ .on_text = (void*)aws_on_content,
+ .on_binary = (void*)aws_on_content,
+ .on_continue = (void*)aws_on_content
+};
+
+struct afb_wsreq
+{
+ struct afb_websock *aws;
+ struct afb_wsreq *next;
+ struct json_object *id;
+ struct json_object *name;
+ struct json_object *token;
+ struct json_object *request;
+};
+
+struct afb_websock
+{
+ int fd;
+ struct MHD_Connection *connection;
+ struct websock *ws;
+ struct upoll *up;
+ struct AFB_clientCtx *context;
+ struct json_tokener *tokener;
+ struct afb_wsreq *requests;
+};
+
+static struct afb_arg wsreq_get(struct afb_wsreq *wsreq, const char *name);
+static void wsreq_iterate(struct afb_wsreq *wsreq, int (*iterator)(void *closure, struct afb_arg arg), void *closure);
+static void wsreq_fail(struct afb_wsreq *wsreq, const char *status, const char *info);
+static void wsreq_success(struct afb_wsreq *wsreq, struct json_object *obj, const char *info);
+static int wsreq_session_create(struct afb_wsreq *wsreq);
+static int wsreq_session_check(struct afb_wsreq *wsreq, int refresh);
+static void wsreq_session_close(struct afb_wsreq *wsreq);
+
+static const struct afb_req_itf wsreq_itf = {
+ .get = (void*)wsreq_get,
+ .iterate = (void*)wsreq_iterate,
+ .fail = (void*)wsreq_fail,
+ .success = (void*)wsreq_success,
+ .session_create = (void*)wsreq_session_create,
+ .session_check = (void*)wsreq_session_check,
+ .session_close = (void*)wsreq_session_close
+};
+
+struct afb_websock *afb_websock_create(struct afb_hreq *hreq)
{
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;
+ if (result == NULL)
+ goto error;
+
+ result->connection = hreq->connection;
+ result->fd = MHD_get_connection_info(hreq->connection,
+ MHD_CONNECTION_INFO_CONNECTION_FD)->connect_fd;
+ result->context = ctxClientGet(afb_hreq_context(hreq));
+ if (result->context == NULL)
+ goto error2;
+
+ result->tokener = json_tokener_new();
+ if (result->tokener == NULL)
+ goto error2;
+
+ result->ws = websock_create(&aws_itf, result);
+ if (result->ws == NULL)
+ goto error3;
+
+ result->up = upoll_open(result->fd, result);
+ if (result->up == NULL)
+ goto error4;
+
+ upoll_on_readable(result->up, (void*)aws_on_readable);
+ upoll_on_hangup(result->up, (void*)aws_disconnect);
+ return result;
+error4:
+ websock_destroy(result->ws);
+error3:
+ json_tokener_free(result->tokener);
+error2:
+ free(result);
+error:
+ return NULL;
+}
+
+static ssize_t aws_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 aws_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 aws_disconnect(struct afb_websock *ws)
+{
+ upoll_close(ws->up);
+ websock_destroy(ws->ws);
+ close(ws->fd);
+ MHD_resume_connection (ws->connection);
+ ctxClientPut(ws->context);
+ json_tokener_free(ws->tokener);
+ free(ws);
+}
+
+static void aws_on_close(struct afb_websock *ws, uint16_t code, size_t size)
+{
+ /* do nothing */
+}
+
+static void aws_on_readable(struct afb_websock *ws)
+{
+ websock_dispatch(ws->ws);
+}
+
+static int aws_handle_json(struct afb_websock *aws, struct json_object *obj)
+{
+ struct afb_req r;
+ int count, num, rc;
+ struct json_object *type, *id, *name, *req, *token;
+ struct afb_wsreq *wsreq;
+ const char *api, *verb;
+ size_t lenapi, lenverb;
+
+ /* protocol inspired by http://www.gir.fr/ocppjs/ocpp_srpc_spec.shtml */
+
+ /* the object must be an array of 4 or 5 elements */
+ if (!json_object_is_type(obj, json_type_array))
+ goto error;
+ count = json_object_array_length(obj);
+ if (count < 4 || count > 5)
+ goto error;
+
+ /* get the 5 elements: type id name request token */
+ type = json_object_array_get_idx(obj, 0);
+ id = json_object_array_get_idx(obj, 1);
+ name = json_object_array_get_idx(obj, 2);
+ req = json_object_array_get_idx(obj, 3);
+ token = json_object_array_get_idx(obj, 4);
+
+ /* check the types: int string string object string */
+ if (!json_object_is_type(type, json_type_int))
+ goto error;
+ if (!json_object_is_type(id, json_type_string))
+ goto error;
+ if (!json_object_is_type(name, json_type_string))
+ goto error;
+ if (!json_object_is_type(req, json_type_object))
+ goto error;
+ if (token != NULL && !json_object_is_type(token, json_type_string))
+ goto error;
+
+ /* the type is only 2 */
+ num = json_object_get_int(type);
+ if (num != 2)
+ goto error;
+
+ /* checks the api/verb structure of name */
+ api = json_object_get_string(name);
+ for (lenapi = 0 ; api[lenapi] && api[lenapi] != '/' ; lenapi++);
+ if (!lenapi || !api[lenapi])
+ goto error;
+ verb = &api[lenapi+1];
+ for (lenverb = 0 ; verb[lenverb] && verb[lenverb] != '/' ; lenverb++);
+ if (!lenverb || !verb[lenverb])
+ goto error;
+
+ /* allocates the request data */
+ wsreq = malloc(sizeof *wsreq);
+ if (wsreq == NULL)
+ goto error;
+
+ /* fill and record the request */
+ wsreq->aws = aws;
+ wsreq->id = json_object_get(id);
+ wsreq->name = json_object_get(name);
+ wsreq->token = json_object_get(token);
+ wsreq->request = json_object_get(req);
+ wsreq->next = aws->requests;
+ aws->requests = wsreq;
+ json_object_put(obj);
+
+ r.data = wsreq;
+ r.itf = &wsreq_itf;
+ rc = afb_apis_handle(r, aws->context, api, lenapi, verb, lenverb);
+ if (rc == 0)
+ wsreq_fail(wsreq, "ail", "api not found");
+ return 1;
+
+error:
+ json_object_put(obj);
+ return 0;
+}
+
+static void aws_on_content(struct afb_websock *ws, int last, size_t size)
+{
+ ssize_t rrc;
+ char buffer[8000];
+ struct json_object *obj;
+
+ json_tokener_reset(ws->tokener);
+ while(size) {
+ rrc = websock_read(ws->ws, buffer,
+ size > sizeof buffer ? sizeof buffer : size);
+ if (rrc < 0) {
+ websock_close(ws->ws);
+ return;
+ }
+ size -= (size_t)rrc;
+ obj = json_tokener_parse_ex(ws->tokener, buffer, (int)rrc);
+ if (obj != NULL) {
+ if (!aws_handle_json(ws, obj)) {
+ websock_close(ws->ws);
+ return;
+ }
+ } else if (json_tokener_get_error(ws->tokener) != json_tokener_continue) {
+ websock_close(ws->ws);
+ return;
}
}
- return result;
+}
+
+
+static struct afb_arg wsreq_get(struct afb_wsreq *wsreq, const char *name)
+{
+ struct afb_arg arg;
+ struct json_object *value;
+
+ if (json_object_object_get_ex(wsreq->request, name, &value)) {
+ arg.name = name;
+ arg.value = json_object_get_string(value);
+ } else {
+ arg.name = NULL;
+ arg.value = NULL;
+ }
+ arg.size = 0;
+ arg.is_file = 0;
+ return arg;
+}
+
+static void wsreq_iterate(struct afb_wsreq *wsreq, int (*iterator)(void *closure, struct afb_arg arg), void *closure)
+{
+ struct afb_arg arg;
+ struct json_object_iterator it = json_object_iter_begin(wsreq->request);
+ struct json_object_iterator end = json_object_iter_end(wsreq->request);
+
+ arg.size = 0;
+ arg.is_file = 0;
+ while(!json_object_iter_equal(&it, &end)) {
+ arg.name = json_object_iter_peek_name(&it);
+ arg.value = json_object_get_string(json_object_iter_peek_value(&it));
+ if (!iterator(closure, arg))
+ break;
+ json_object_iter_next(&it);
+ }
+}
+
+static int wsreq_session_create(struct afb_wsreq *wsreq)
+{
+ struct AFB_clientCtx *context = wsreq->aws->context;
+ if (context->created)
+ return 0;
+ return wsreq_session_check(wsreq, 1);
+}
+
+static int wsreq_session_check(struct afb_wsreq *wsreq, int refresh)
+{
+ const char *token;
+ struct AFB_clientCtx *context = wsreq->aws->context;
+
+ if (wsreq->token == NULL)
+ return 0;
+
+ token = json_object_get_string(wsreq->token);
+ if (token == NULL)
+ return 0;
+
+ if (!ctxTokenCheck (context, token))
+ return 0;
+
+ if (refresh) {
+ ctxTokenNew (context);
+ }
+
+ return 1;
+}
+
+static void wsreq_session_close(struct afb_wsreq *wsreq)
+{
+ struct AFB_clientCtx *context = wsreq->aws->context;
+ ctxClientClose(context);
+}
+
+
+static void wsreq_reply(struct afb_wsreq *wsreq, int retcode, const char *status, const char *info, json_object *resp)
+{
+ json_object *root, *request, *reply;
+ const char *message;
+
+ /* builds the answering structure */
+ root = json_object_new_object();
+ json_object_object_add(root, "jtype", json_object_new_string("afb-reply"));
+ request = json_object_new_object();
+ json_object_object_add(root, "request", request);
+ json_object_object_add(request, "status", json_object_new_string(status));
+ if (info)
+ json_object_object_add(request, "info", json_object_new_string(info));
+ if (resp)
+ json_object_object_add(root, "response", resp);
+
+ /* make the reply */
+ reply = json_object_new_array();
+ json_object_array_add(reply, json_object_new_int(retcode));
+ json_object_array_add(reply, wsreq->id);
+ json_object_array_add(reply, root);
+ json_object_array_add(reply, json_object_new_string(wsreq->aws->context->token));
+
+ /* emits the reply */
+ message = json_object_to_json_string(reply);
+ websock_text(wsreq->aws->ws, message, strlen(message));
+
+ /* TODO eliminates the wsreq */
+}
+
+static void wsreq_fail(struct afb_wsreq *wsreq, const char *status, const char *info)
+{
+ wsreq_reply(wsreq, 4, status, info, NULL);
+}
+
+static void wsreq_success(struct afb_wsreq *wsreq, json_object *obj, const char *info)
+{
+ wsreq_reply(wsreq, 3, "success", info, obj);
}
Code Review / src / app-framework-binder.git / commitdiff