1 files changed, 284 insertions, 0 deletions
diff --git a/src/spdk/lib/jsonrpc/jsonrpc_client_tcp.c b/src/spdk/lib/jsonrpc/jsonrpc_client_tcp.c
new file mode 100644
index 00000000..a7696c84
--- /dev/null
+++ b/src/spdk/lib/jsonrpc/jsonrpc_client_tcp.c
@@ -0,0 +1,284 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright (c) Intel Corporation.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#include "spdk/string.h"
+#include "jsonrpc_internal.h"
+
+#define RPC_DEFAULT_PORT	"5260"
+
+static struct spdk_jsonrpc_client *
+_spdk_jsonrpc_client_connect(int domain, int protocol,
+			     struct sockaddr *server_addr, socklen_t addrlen)
+{
+	struct spdk_jsonrpc_client *client;
+	int rc;
+
+	client = calloc(1, sizeof(struct spdk_jsonrpc_client));
+	if (client == NULL) {
+		return NULL;
+	}
+
+	client->sockfd = socket(domain, SOCK_STREAM, protocol);
+	if (client->sockfd < 0) {
+		SPDK_ERRLOG("socket() failed\n");
+		free(client);
+		return NULL;
+	}
+
+	rc = connect(client->sockfd, server_addr, addrlen);
+	if (rc != 0) {
+		SPDK_ERRLOG("could not connet JSON-RPC server: %s\n", spdk_strerror(errno));
+		close(client->sockfd);
+		free(client);
+		return NULL;
+	}
+
+	/* memory malloc for recv-buf */
+	client->recv_buf = malloc(SPDK_JSONRPC_SEND_BUF_SIZE_INIT);
+	if (!client->recv_buf) {
+		SPDK_ERRLOG("memory malloc for recv-buf failed\n");
+		close(client->sockfd);
+		free(client);
+		return NULL;
+	}
+	client->recv_buf_size = SPDK_JSONRPC_SEND_BUF_SIZE_INIT;
+
+	return client;
+}
+
+struct spdk_jsonrpc_client *
+spdk_jsonrpc_client_connect(const char *rpc_sock_addr, int addr_family)
+{
+	struct spdk_jsonrpc_client *client;
+
+	if (addr_family == AF_UNIX) {
+		/* Unix Domain Socket */
+		struct sockaddr_un rpc_sock_addr_unix = {};
+		int rc;
+
+		rpc_sock_addr_unix.sun_family = AF_UNIX;
+		rc = snprintf(rpc_sock_addr_unix.sun_path,
+			      sizeof(rpc_sock_addr_unix.sun_path),
+			      "%s", rpc_sock_addr);
+		if (rc < 0 || (size_t)rc >= sizeof(rpc_sock_addr_unix.sun_path)) {
+			SPDK_ERRLOG("RPC Listen address Unix socket path too long\n");
+			return NULL;
+		}
+
+		client = _spdk_jsonrpc_client_connect(AF_UNIX, 0,
+						      (struct sockaddr *)&rpc_sock_addr_unix,
+						      sizeof(rpc_sock_addr_unix));
+	} else {
+		/* TCP/IP socket */
+		struct addrinfo		hints;
+		struct addrinfo		*res;
+		char *tmp;
+		char *host, *port;
+
+		tmp = strdup(rpc_sock_addr);
+		if (!tmp) {
+			SPDK_ERRLOG("Out of memory\n");
+			return NULL;
+		}
+
+		if (spdk_parse_ip_addr(tmp, &host, &port) < 0) {
+			free(tmp);
+			SPDK_ERRLOG("Invalid listen address '%s'\n", rpc_sock_addr);
+			return NULL;
+		}
+
+		if (port == NULL) {
+			port = RPC_DEFAULT_PORT;
+		}
+
+		memset(&hints, 0, sizeof(hints));
+		hints.ai_family = AF_UNSPEC;
+		hints.ai_socktype = SOCK_STREAM;
+		hints.ai_protocol = IPPROTO_TCP;
+
+		if (getaddrinfo(host, port, &hints, &res) != 0) {
+			free(tmp);
+			SPDK_ERRLOG("Unable to look up RPC connnect address '%s'\n", rpc_sock_addr);
+			return NULL;
+		}
+
+		client = _spdk_jsonrpc_client_connect(res->ai_family, res->ai_protocol,
+						      res->ai_addr, res->ai_addrlen);
+
+		freeaddrinfo(res);
+		free(tmp);
+	}
+
+	return client;
+}
+
+void
+spdk_jsonrpc_client_close(struct spdk_jsonrpc_client *client)
+{
+	if (client->sockfd >= 0) {
+		close(client->sockfd);
+		free(client->recv_buf);
+		client->sockfd = -1;
+	}
+
+	free(client);
+}
+
+struct spdk_jsonrpc_client_request *
+spdk_jsonrpc_client_create_request(void)
+{
+	struct spdk_jsonrpc_client_request *request;
+
+	request = calloc(1, sizeof(*request));
+	if (request == NULL) {
+		return NULL;
+	}
+
+	/* memory malloc for send-buf */
+	request->send_buf = malloc(SPDK_JSONRPC_SEND_BUF_SIZE_INIT);
+	if (!request->send_buf) {
+		SPDK_ERRLOG("memory malloc for send-buf failed\n");
+		free(request);
+		return NULL;
+	}
+	request->send_buf_size = SPDK_JSONRPC_SEND_BUF_SIZE_INIT;
+
+	return request;
+}
+
+void
+spdk_jsonrpc_client_free_request(struct spdk_jsonrpc_client_request *req)
+{
+	free(req->send_buf);
+	free(req);
+}
+
+int
+spdk_jsonrpc_client_send_request(struct spdk_jsonrpc_client *client,
+				 struct spdk_jsonrpc_client_request *request)
+{
+	ssize_t rc;
+
+	/* Reset offset in request */
+	request->send_offset = 0;
+
+	while (request->send_len > 0) {
+		rc = send(client->sockfd, request->send_buf + request->send_offset,
+			  request->send_len, 0);
+		if (rc <= 0) {
+			if (rc < 0 && errno == EINTR) {
+				rc = 0;
+			} else {
+				return rc;
+			}
+		}
+
+		request->send_offset += rc;
+		request->send_len -= rc;
+	}
+
+	return 0;
+}
+
+static int
+recv_buf_expand(struct spdk_jsonrpc_client *client)
+{
+	uint8_t *new_buf;
+
+	if (client->recv_buf_size * 2 > SPDK_JSONRPC_SEND_BUF_SIZE_MAX) {
+		return -ENOSPC;
+	}
+
+	new_buf = realloc(client->recv_buf, client->recv_buf_size * 2);
+	if (new_buf == NULL) {
+		SPDK_ERRLOG("Resizing recv_buf failed (current size %zu, new size %zu)\n",
+			    client->recv_buf_size, client->recv_buf_size * 2);
+		return -ENOMEM;
+	}
+
+	client->recv_buf = new_buf;
+	client->recv_buf_size *= 2;
+
+	return 0;
+}
+
+int
+spdk_jsonrpc_client_recv_response(struct spdk_jsonrpc_client *client,
+				  spdk_jsonrpc_client_response_parser parser_fn,
+				  void *parser_ctx)
+{
+	ssize_t rc = 0;
+	size_t recv_avail;
+	size_t recv_offset = 0;
+
+	client->parser_fn = parser_fn;
+	client->parser_ctx = parser_ctx;
+
+	recv_avail = client->recv_buf_size;
+
+	while (recv_avail > 0) {
+		rc = recv(client->sockfd, client->recv_buf + recv_offset, recv_avail, 0);
+		if (rc < 0) {
+			if (errno == EINTR) {
+				continue;
+			} else {
+				return errno;
+			}
+		} else if (rc == 0) {
+			return -EIO;
+		}
+
+		recv_offset += rc;
+		recv_avail -= rc;
+
+		/* Check to see if we have received a full JSON value. */
+		rc = spdk_jsonrpc_parse_response(client, client->recv_buf, recv_offset);
+		if (rc == 0) {
+			/* Successfully parsed response */
+			return 0;
+		} else if (rc != SPDK_JSON_PARSE_INCOMPLETE) {
+			SPDK_ERRLOG("jsonrpc parse request failed\n");
+			return -EINVAL;
+		}
+
+		/* Expand receive buffer if larger one is needed */
+		if (recv_avail == 0) {
+			rc = recv_buf_expand(client);
+			if (rc != 0) {
+				return rc;
+			}
+			recv_avail = client->recv_buf_size - recv_offset;
+		}
+	}
+
+	return 0;
+}