WIP
parent
44992e940c
commit
1dc5b4bcbe
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@ -50,8 +50,7 @@ struct ipc_error ipc_ctx_init (struct ipc_ctx **ctx)
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* for example by managing allocations of thousands of structures at once.
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* WARNING: Store and remove only pointers on allocated structures.
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*/
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struct ipc_error
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ipc_ctx_new_alloc (struct ipc_ctx *ctx)
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struct ipc_error ipc_ctx_new_alloc (struct ipc_ctx *ctx)
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{
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ctx->size++;
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@ -59,8 +58,7 @@ ipc_ctx_new_alloc (struct ipc_ctx *ctx)
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if (ctx->size == 1 && ctx->cinfos == NULL && ctx->pollfd == NULL) {
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SECURE_BUFFER_HEAP_ALLOCATION_R (ctx->cinfos, sizeof (struct ipc_connection_info),,
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IPC_ERROR_ADD__MALLOC);
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SECURE_BUFFER_HEAP_ALLOCATION_R (ctx->pollfd, sizeof (struct pollfd),,
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IPC_ERROR_ADD__MALLOC_POLLFD);
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SECURE_BUFFER_HEAP_ALLOCATION_R (ctx->pollfd, sizeof (struct pollfd),, IPC_ERROR_ADD__MALLOC_POLLFD);
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} else {
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ctx->cinfos = realloc (ctx->cinfos, sizeof (struct ipc_connection_info) * ctx->size);
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ctx->pollfd = realloc (ctx->pollfd, sizeof (struct pollfd ) * ctx->size);
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@ -70,38 +68,39 @@ ipc_ctx_new_alloc (struct ipc_ctx *ctx)
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T_R ((ctx->pollfd == NULL), IPC_ERROR_ADD__EMPTY_LIST);
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// Clean the last entry.
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memset (ctx->cinfos[ctx-size -1], 0, sizeof (struct ipc_connection_info));
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memset (ctx->pollfd[ctx-size -1], 0, sizeof (struct pollfd));
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memset (&ctx->cinfos[ctx->size -1], 0, sizeof (struct ipc_connection_info));
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memset (&ctx->pollfd[ctx->size -1], 0, sizeof (struct pollfd));
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IPC_RETURN_ERROR;
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IPC_RETURN_NO_ERROR;
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}
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struct ipc_error
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ipc_server_init (char **env, struct ipc_ctx **ctx, const char *sname)
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struct ipc_error ipc_server_init (struct ipc_ctx **ctx, const char *sname)
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{
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T_R ((env == NULL), IPC_ERROR_SERVER_INIT__NO_ENVIRONMENT_PARAM);
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T_R ((sname == NULL), IPC_ERROR_SERVER_INIT__NO_SERVER_NAME_PARAM);
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ipc_ctx_init(ctx);
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// gets the service path
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SECURE_BUFFER_DECLARATION (char, buf, PATH_MAX);
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TEST_IPC_RR (service_path (buf, sname), "cannot get server path");
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size_t s = strlen (buf);
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ipc_ctx_init(ctx); // Allocate the context.
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// Declaration and instanciation of the new connection (ipc_connection_info + pollfd).
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SECURE_DECLARATION (struct ipc_connection_info, srv);
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srv.type = IPC_CONNECTION_TYPE_SERVER;
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SECURE_DECLARATION(struct pollfd, pollfd);
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pollfd.events = POLLIN;
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// Get the service path.
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SECURE_BUFFER_DECLARATION (char, buf, PATH_MAX);
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TEST_IPC_RR (service_path (buf, sname), "cannot get server path");
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size_t s = strlen (buf);
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if (s > PATH_MAX)
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s = PATH_MAX;
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SECURE_BUFFER_HEAP_ALLOCATION_R (srv.spath, s + 1,, IPC_ERROR_SERVER_INIT__MALLOC);
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memcpy (srv.spath, buf, s);
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srv.spath[s] = '\0'; // to be sure
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// Socket initialisation for the service.
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TEST_IPC_RETURN_ON_ERROR (usock_init (&pollfd.fd, srv.spath));
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// Add the server to the listened file descriptors.
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// ipc_add allocate memory then copy the data of srv and pollfd in ctx.
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TEST_IPC_RR (ipc_add (*ctx, &srv, &pollfd), "cannot add the server in the context");
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IPC_RETURN_NO_ERROR;
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@ -166,9 +165,8 @@ struct ipc_error ipc_contact_networkd (int *pfd, const char *sname)
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}
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// Create context, contact networkd, connects to the service.
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struct ipc_error ipc_connection (char **env, struct ipc_ctx **ctx, const char *sname)
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struct ipc_error ipc_connection (struct ipc_ctx **ctx, const char *sname)
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{
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T_R ((env == NULL), IPC_ERROR_CONNECTION__NO_ENVIRONMENT_PARAM);
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T_R ((ctx == NULL), IPC_ERROR_CONNECTION__NO_CTX);
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T_R ((sname == NULL), IPC_ERROR_CONNECTION__NO_SERVICE_NAME);
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@ -195,46 +193,63 @@ struct ipc_error ipc_connection (char **env, struct ipc_ctx **ctx, const char *s
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IPC_RETURN_NO_ERROR;
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}
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struct ipc_error ipc_server_close (struct ipc_connection_info *srv)
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struct ipc_error ipc_close_all (struct ipc_ctx *ctx)
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{
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usock_close (srv->pollfd.fd);
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struct ipc_error ret = usock_remove (srv->spath);
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if (srv->spath != NULL) {
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free (srv->spath);
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srv->spath = NULL;
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for (size_t i = 0 ; i < ctx->size ; i++) {
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TEST_IPC_P (ipc_close (ctx, i), "cannot close a connection in handle_message");
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}
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return ret;
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}
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struct ipc_error ipc_close (struct ipc_connection_info *p)
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{
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return usock_close (p->pollfd.fd);
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}
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struct ipc_error ipc_accept (
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struct ipc_connection_info *srv
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, struct ipc_connection_info *p)
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{
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T_R ((srv == NULL), IPC_ERROR_ACCEPT__NO_SERVICE_PARAM);
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T_R ((p == NULL), IPC_ERROR_ACCEPT__NO_CLIENT_PARAM);
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TEST_IPC_RR (usock_accept (srv->pollfd.fd, &p->pollfd.fd), "cannot accept IPC connection");
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p->pollfd.events = POLLIN; // Tell to poll(2) to watch for incoming data from this fd.
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p->type = IPC_CONNECTION_TYPE_IPC;
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IPC_RETURN_NO_ERROR;
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}
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struct ipc_error ipc_close (struct ipc_ctx *ctx, uint32_t index)
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{
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struct ipc_error ret = usock_close (ctx->pollfd[index].fd);
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if (ctx->cinfos[i]->type == IPC_CONNECTION_TYPE_SERVER) {
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struct ipc_error ret = usock_remove (ctx->cinfos[i]->spath);
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if (srv->spath != NULL) {
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free (srv->spath);
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srv->spath = NULL;
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}
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}
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return ret;
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}
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// New connection from a client.
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struct ipc_error ipc_accept_add (struct ipc_event *event, struct ipc_ctx *ctx, uint32_t index)
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{
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T_R ((ctx == NULL), IPC_ERROR_HANDLE_NEW_CONNECTION__NO_CINFOS_PARAM);
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T_R ((index >= ctx->size), IPC_ERROR_HANDLE_NEW_CONNECTION__INCONSISTENT_INDEX);
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// Memory reallocation.
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ipc_ctx_new_alloc (ctx);
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int server_fd = ctx->pollfd[index].fd;
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int *client_fd = &ctx->pollfd[ctx->size -1].fd;
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TEST_IPC_RR (usock_accept (server_fd, client_fd), "cannot accept IPC connection");
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ctx->pollfd[ctx->size -1].events = POLLIN; // Tell to poll(2) to watch for incoming data from this fd.
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ctx->cinfos[ctx->size -1].type = IPC_CONNECTION_TYPE_IPC;
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struct ipc_connection_info *new_client = &ctx->cinfos[ctx->size];
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ctx->size++;
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IPC_EVENT_SET (event, IPC_EVENT_TYPE_CONNECTION, NULL, new_client);
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IPC_RETURN_NO_ERROR;
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}
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// receive then format in an ipc_message structure
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struct ipc_error ipc_read (const struct ipc_connection_info *p, struct ipc_message *m)
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struct ipc_error ipc_read (const struct ipc_ctx *ctx, uint32_t index, struct ipc_message *m)
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{
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T_R ((m == NULL), IPC_ERROR_READ__NO_MESSAGE_PARAM);
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char *buf = NULL;
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size_t msize = IPC_MAX_MESSAGE_SIZE;
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// on error or closed recipient, the buffer already freed
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TEST_IPC_RETURN_ON_ERROR (usock_recv (p->pollfd.fd, &buf, &msize));
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// On error or closed recipient, the buffer already freed.
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TEST_IPC_RETURN_ON_ERROR (usock_recv (ctx->pollfd[index].fd, &buf, &msize));
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TEST_IPC_RETURN_ON_ERROR_FREE (ipc_message_format_read (m, buf, msize), buf);
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free (buf);
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@ -262,32 +277,130 @@ struct ipc_error ipc_write_fd (int fd, const struct ipc_message *m)
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IPC_RETURN_NO_ERROR;
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}
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struct ipc_error ipc_write (const struct ipc_connection_info *p, const struct ipc_message *m)
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// TODO: high level API, should be buffered, socket may not be usable for now.
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struct ipc_error ipc_write (const struct ipc_ctx *ctx, uint32_t index, const struct ipc_message *m)
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{
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return ipc_write_fd (p->pollfd.fd, m);
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return ipc_write_fd (ctx->pollfd[index].fd, m);
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}
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// New connection from a client.
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struct ipc_error
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ipc_accept_add (struct ipc_event *event, struct ipc_ctx *ctx, uint32_t i)
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/**
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* Allocate memory then add a new connection to the context.
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*/
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struct ipc_error ipc_add ( struct ipc_ctx *ctx, struct ipc_connection_info *p, struct pollfd *pollfd)
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{
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T_R ((ctx == NULL), IPC_ERROR_HANDLE_NEW_CONNECTION__NO_CINFOS_PARAM);
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T_R ((i >= ctx->size), IPC_ERROR_HANDLE_NEW_CONNECTION__INCONSISTENT_INDEX);
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T_R ((ctx == NULL), IPC_ERROR_ADD__NO_PARAM_CLIENTS);
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T_R ((p == NULL), IPC_ERROR_ADD__NO_PARAM_CLIENT);
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// Memory reallocation.
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ipc_ctx_new_alloc (ctx);
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TEST_IPC_RR (usock_accept (ctx->pollfd[i].fd, &ctx->pollfd[ctx->size -1].fd), "cannot accept IPC connection");
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ctx->pollfd[ctx->size -1].events = POLLIN; // Tell to poll(2) to watch for incoming data from this fd.
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ctx->cinfos[ctx->size -1].type = IPC_CONNECTION_TYPE_IPC;
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memcpy (ctx->cinfos[ctx->size - 1], p , sizeof (struct ipc_connection_info));
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memcpy (ctx->pollfd[ctx->size - 1], pollfd, sizeof (struct pollfd));
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struct ipc_connection_info *new_client = &ctx->cinfos[ctx->size];
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ctx->size++;
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IPC_EVENT_SET (event, IPC_EVENT_TYPE_CONNECTION, NULL, new_client);
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IPC_RETURN_NO_ERROR;
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}
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struct ipc_error ipc_del (
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struct ipc_ctx *ctx
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, struct ipc_connection_info *p)
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{
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T_R ((ctx == NULL), IPC_ERROR_DEL__NO_CLIENTS_PARAM);
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T_R ((p == NULL), IPC_ERROR_DEL__NO_CLIENT_PARAM);
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T_R ((ctx->cinfos == NULL), IPC_ERROR_DEL__EMPTY_LIST);
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size_t i;
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for (i = 0; i < ctx->size; i++) {
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// WARNING: The test is performed on the pointers of both structures,
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// this is efficient but it doesn't work if the p structure is a copy.
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if (ctx->cinfos[i] == p) {
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// TODO: possible memory leak if the ipc_connection_info is not deeply free'ed.
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ctx->cinfos[i] = ctx->cinfos[ctx->size - 1];
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ctx->size--;
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if (ctx->size == 0) {
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ipc_connections_free (ctx);
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} else {
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ctx->cinfos = realloc (ctx->cinfos, sizeof (struct ipc_connection_info) * ctx->size);
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if (ctx->cinfos == NULL) {
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IPC_RETURN_ERROR (IPC_ERROR_DEL__EMPTIED_LIST);
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}
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}
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IPC_RETURN_NO_ERROR;
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}
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}
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IPC_RETURN_ERROR (IPC_ERROR_DEL__CANNOT_FIND_CLIENT);
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}
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void ipc_connections_free (struct ipc_ctx *ctx)
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{
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if (ctx->cinfos != NULL) {
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for (size_t i = 0; i < ctx->size; i++) {
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free (ctx->cinfos[i]);
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}
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free (ctx->cinfos);
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ctx->cinfos = NULL;
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}
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ctx->size = 0;
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}
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// add an arbitrary file descriptor to read
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struct ipc_error ipc_add_fd (struct ipc_ctx *ctx, int fd)
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{
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T_R ((ctx == NULL), IPC_ERROR_ADD_FD__NO_PARAM_CINFOS);
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SECURE_DECLARATION (struct ipc_connection_info, cinfo);
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cinfo.type = IPC_CONNECTION_TYPE_EXTERNAL;
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SECURE_DECLARATION (struct pollfd, pollfd);
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pollfd.fd = fd;
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pollfd.events = POLLIN;
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return ipc_add (ctx, &cinfo, &pollfd);
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}
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// remove a connection from its file descriptor
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struct ipc_error ipc_del_fd (struct ipc_ctx *ctx, int fd)
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{
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T_R ((ctx == NULL), IPC_ERROR_DEL_FD__NO_PARAM_CINFOS);
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T_R ((ctx->cinfos == NULL || ctx->pollfd), IPC_ERROR_DEL_FD__EMPTY_LIST);
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for (size_t i = 0; i < ctx->size; i++) {
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if (ctx->pollfd[i].fd == fd) {
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if (ctx->cinfos[i].spath != NULL)
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free (ctx->cinfos[i].spath);
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ctx->size--;
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if (ctx->size == 0) {
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// free ctx->cinfos and ctx->pollfd
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ipc_connections_free (ctx);
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} else {
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// The last element in the array replaces the removed one.
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ctx->cinfos[i] = ctx->cinfos[ctx->size];
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ctx->pollfd[i] = ctx->pollfd[ctx->size];
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// Reallocation of the arrays. TODO: should be optimised someday.
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ctx->cinfos = realloc (ctx->cinfos, sizeof (struct ipc_connection_info) * ctx->size);
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ctx->pollfd = realloc (ctx->pollfd, sizeof (struct pollfd ) * ctx->size);
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if (ctx->cinfos == NULL || ctx->pollfd == NULL) {
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IPC_RETURN_ERROR (IPC_ERROR_DEL_FD__EMPTIED_LIST);
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}
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}
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IPC_RETURN_NO_ERROR;
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}
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}
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IPC_RETURN_ERROR (IPC_ERROR_DEL_FD__CANNOT_FIND_CLIENT);
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}
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#if 0
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// new message
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struct ipc_error handle_message (
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struct ipc_event *event
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@ -380,6 +493,7 @@ struct ipc_error handle_message (
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IPC_EVENT_SET (event, IPC_EVENT_TYPE_ERROR, NULL, pc);
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return rvalue;
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}
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// disconnection: close the client then delete it from ctx
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if (ret.error_code == IPC_ERROR_CLOSED_RECIPIENT) {
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TEST_IPC_P (ipc_close (pc), "cannot close a connection on closed recipient in handle_message");
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@ -494,7 +608,6 @@ hungup:
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IPC_RETURN_NO_ERROR;
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}
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#if 0
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struct ipc_error ipc_wait_event_networkd (
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struct ipc_ctx *ctx
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, struct ipc_connection_info *cinfo // NULL for clients
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@ -574,7 +687,6 @@ struct ipc_error ipc_wait_event_networkd (
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IPC_RETURN_NO_ERROR;
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}
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#endif
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struct ipc_error ipc_wait_event (
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struct ipc_ctx *ctx
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@ -584,134 +696,4 @@ struct ipc_error ipc_wait_event (
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{
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return ipc_wait_event_networkd (ctx, cinfo, event, NULL, timer);
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}
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/**
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* Allocate memory then add a new connection to the context.
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*/
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struct ipc_error
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ipc_add (
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struct ipc_ctx *ctx
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, struct ipc_connection_info *p
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, struct pollfd *pollfd)
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{
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T_R ((ctx == NULL), IPC_ERROR_ADD__NO_PARAM_CLIENTS);
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T_R ((p == NULL), IPC_ERROR_ADD__NO_PARAM_CLIENT);
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// Memory reallocation.
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ipc_ctx_new_alloc (ctx);
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memcpy (ctx->cinfos[ctx->size - 1], p , sizeof (struct ipc_connection_info));
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memcpy (ctx->pollfd[ctx->size - 1], pollfd, sizeof (struct pollfd));
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IPC_RETURN_NO_ERROR;
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}
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struct ipc_error ipc_del (
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struct ipc_ctx *ctx
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, struct ipc_connection_info *p)
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{
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T_R ((ctx == NULL), IPC_ERROR_DEL__NO_CLIENTS_PARAM);
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T_R ((p == NULL), IPC_ERROR_DEL__NO_CLIENT_PARAM);
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T_R ((ctx->cinfos == NULL), IPC_ERROR_DEL__EMPTY_LIST);
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size_t i;
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for (i = 0; i < ctx->size; i++) {
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// WARNING: The test is performed on the pointers of both structures,
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// this is efficient but it doesn't work if the p structure is a copy.
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if (ctx->cinfos[i] == p) {
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// TODO: possible memory leak if the ipc_connection_info is not deeply free'ed.
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ctx->cinfos[i] = ctx->cinfos[ctx->size - 1];
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ctx->size--;
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if (ctx->size == 0) {
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ipc_connections_free (ctx);
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} else {
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ctx->cinfos = realloc (ctx->cinfos, sizeof (struct ipc_connection_info) * ctx->size);
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if (ctx->cinfos == NULL) {
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IPC_RETURN_ERROR (IPC_ERROR_DEL__EMPTIED_LIST);
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}
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}
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IPC_RETURN_NO_ERROR;
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}
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}
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IPC_RETURN_ERROR (IPC_ERROR_DEL__CANNOT_FIND_CLIENT);
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}
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void ipc_connections_close (struct ipc_ctx *ctx)
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{
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if (ctx->cinfos != NULL) {
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for (size_t i = 0; i < ctx->size; i++) {
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ipc_close (ctx->cinfos[i]);
|
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free (ctx->cinfos[i]);
|
||||
}
|
||||
free (ctx->cinfos);
|
||||
ctx->cinfos = NULL;
|
||||
}
|
||||
ctx->size = 0;
|
||||
}
|
||||
|
||||
void ipc_connections_free (struct ipc_ctx *ctx)
|
||||
{
|
||||
if (ctx->cinfos != NULL) {
|
||||
for (size_t i = 0; i < ctx->size; i++) {
|
||||
free (ctx->cinfos[i]);
|
||||
}
|
||||
free (ctx->cinfos);
|
||||
ctx->cinfos = NULL;
|
||||
}
|
||||
ctx->size = 0;
|
||||
}
|
||||
|
||||
// add an arbitrary file descriptor to read
|
||||
struct ipc_error ipc_add_fd (struct ipc_ctx *ctx, int fd)
|
||||
{
|
||||
T_R ((ctx == NULL), IPC_ERROR_ADD_FD__NO_PARAM_CINFOS);
|
||||
|
||||
SECURE_DECLARATION (struct ipc_connection_info, cinfo);
|
||||
cinfo.type = IPC_CONNECTION_TYPE_EXTERNAL;
|
||||
|
||||
SECURE_DECLARATION (struct pollfd, pollfd);
|
||||
pollfd.fd = fd;
|
||||
pollfd.events = POLLIN;
|
||||
|
||||
return ipc_add (ctx, &cinfo, &pollfd);
|
||||
}
|
||||
|
||||
// remove a connection from its file descriptor
|
||||
struct ipc_error ipc_del_fd (struct ipc_ctx *ctx, int fd)
|
||||
{
|
||||
T_R ((ctx == NULL), IPC_ERROR_DEL_FD__NO_PARAM_CINFOS);
|
||||
T_R ((ctx->cinfos == NULL), IPC_ERROR_DEL_FD__EMPTY_LIST);
|
||||
|
||||
for (size_t i = 0; i < ctx->size; i++) {
|
||||
|
||||
if (ctx->cinfos[i]->pollfd.fd == fd) {
|
||||
|
||||
ctx->cinfos[i]->pollfd.fd = -1;
|
||||
free (ctx->cinfos[i]);
|
||||
ctx->pollfd[i] = NULL;
|
||||
ctx->size--;
|
||||
|
||||
if (ctx->size == 0) {
|
||||
// free ctx->cinfos
|
||||
ipc_connections_free (ctx);
|
||||
} else {
|
||||
ctx->cinfos[i] = ctx->cinfos[ctx->size];
|
||||
ctx->pollfd[i] = ctx->pollfd[ctx->size];
|
||||
|
||||
ctx->cinfos = realloc (ctx->cinfos, sizeof (struct ipc_connection_info) * ctx->size);
|
||||
ctx->pollfd = realloc (ctx->pollfd, sizeof (struct pollfd ) * ctx->size);
|
||||
|
||||
if (ctx->cinfos == NULL || ctx->pollfd == NULL) {
|
||||
IPC_RETURN_ERROR (IPC_ERROR_DEL_FD__EMPTIED_LIST);
|
||||
}
|
||||
}
|
||||
|
||||
IPC_RETURN_NO_ERROR;
|
||||
}
|
||||
}
|
||||
|
||||
IPC_RETURN_ERROR (IPC_ERROR_DEL_FD__CANNOT_FIND_CLIENT);
|
||||
}
|
||||
#endif
|
||||
|
|
21
src/ipc.h
21
src/ipc.h
|
@ -266,20 +266,15 @@ enum ipc_connection_types {
|
|||
* main public functions
|
||||
**/
|
||||
|
||||
struct ipc_error
|
||||
ipc_server_init (
|
||||
char **env
|
||||
, struct ipc_ctx **ctx
|
||||
, const char *sname);
|
||||
struct ipc_error ipc_connection (char **env, struct ipc_ctx **ctx, const char *sname);
|
||||
struct ipc_error ipc_server_init (struct ipc_ctx **ctx, const char *sname);
|
||||
struct ipc_error ipc_connection (struct ipc_ctx **ctx, const char *sname);
|
||||
|
||||
struct ipc_error ipc_server_close (struct ipc_connection_info *srv);
|
||||
struct ipc_error ipc_close (struct ipc_connection_info *p);
|
||||
struct ipc_error ipc_close (struct ipc_ctx *ctx, uint32_t index);
|
||||
struct ipc_error ipc_close_all (struct ipc_ctx *ctx);
|
||||
|
||||
struct ipc_error ipc_read (const struct ipc_connection_info *, struct ipc_message *m);
|
||||
struct ipc_error ipc_write (const struct ipc_connection_info *, const struct ipc_message *m);
|
||||
struct ipc_error ipc_read (const struct ipc_ctx *, uint32_t index, struct ipc_message *m);
|
||||
struct ipc_error ipc_write (const struct ipc_ctx *, uint32_t index, const struct ipc_message *m);
|
||||
|
||||
struct ipc_error ipc_wait_event (struct ipc_ctx *, struct ipc_event *, int *timer);
|
||||
struct ipc_error ipc_wait_event (struct ipc_ctx *, struct ipc_event *, int *timer);
|
||||
|
||||
// store and remove only pointers on allocated structures
|
||||
|
@ -291,7 +286,6 @@ struct ipc_error ipc_add_fd (struct ipc_ctx *cinfos, int fd);
|
|||
struct ipc_error ipc_del_fd (struct ipc_ctx *cinfos, int fd);
|
||||
|
||||
void ipc_connections_free (struct ipc_ctx *);
|
||||
void ipc_connections_close (struct ipc_ctx *cinfos);
|
||||
|
||||
/***
|
||||
* message functions
|
||||
|
@ -328,7 +322,8 @@ struct ipc_error ipc_ctx_init (struct ipc_ctx **);
|
|||
void ipc_connection_print (struct ipc_connection_info *cinfo);
|
||||
void ipc_connections_print (struct ipc_ctx *cinfos);
|
||||
|
||||
struct ipc_error ipc_accept (struct ipc_connection_info *srv, struct ipc_connection_info *p);
|
||||
// Last parameter is the index for the server fd in the context structure.
|
||||
struct ipc_error ipc_accept_add (struct ipc_event *event, struct ipc_ctx *ctx, uint32_t index);
|
||||
struct ipc_error ipc_contact_networkd (int *pfd, const char *sname);
|
||||
struct ipc_error service_path (char *path, const char *sname);
|
||||
|
||||
|
|
Reference in New Issue