2 * This file is part of the libsigrok project.
4 * Copyright (C) 2013 Martin Ling <martin-sigrok@earth.li>
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
22 #define _WIN32_WINNT 0x0501
30 #include <sys/socket.h>
31 #include <netinet/in.h>
32 #include <arpa/inet.h>
36 #include <libsigrok/libsigrok.h>
37 #include "libsigrok-internal.h"
40 #define LOG_PREFIX "scpi_tcp"
42 #define LENGTH_BYTES 4
48 char length_buf[LENGTH_BYTES];
49 int length_bytes_read;
51 int response_bytes_read;
54 static int scpi_tcp_dev_inst_new(void *priv, struct drv_context *drvc,
55 const char *resource, char **params, const char *serialcomm)
57 struct scpi_tcp *tcp = priv;
63 if (!params || !params[1] || !params[2]) {
64 sr_err("Invalid parameters.");
68 tcp->address = g_strdup(params[1]);
69 tcp->port = g_strdup(params[2]);
75 static int scpi_tcp_open(struct sr_scpi_dev_inst *scpi)
77 struct scpi_tcp *tcp = scpi->priv;
78 struct addrinfo hints;
79 struct addrinfo *results, *res;
82 memset(&hints, 0, sizeof(hints));
83 hints.ai_family = AF_UNSPEC;
84 hints.ai_socktype = SOCK_STREAM;
85 hints.ai_protocol = IPPROTO_TCP;
87 err = getaddrinfo(tcp->address, tcp->port, &hints, &results);
90 sr_err("Address lookup failed: %s:%s: %s", tcp->address, tcp->port,
95 for (res = results; res; res = res->ai_next) {
96 if ((tcp->socket = socket(res->ai_family, res->ai_socktype,
97 res->ai_protocol)) < 0)
99 if (connect(tcp->socket, res->ai_addr, res->ai_addrlen) != 0) {
107 freeaddrinfo(results);
109 if (tcp->socket < 0) {
110 sr_err("Failed to connect to %s:%s: %s", tcp->address, tcp->port,
118 static int scpi_tcp_source_add(struct sr_session *session, void *priv,
119 int events, int timeout, sr_receive_data_callback cb, void *cb_data)
121 struct scpi_tcp *tcp = priv;
123 return sr_session_source_add(session, tcp->socket, events, timeout,
127 static int scpi_tcp_source_remove(struct sr_session *session, void *priv)
129 struct scpi_tcp *tcp = priv;
131 return sr_session_source_remove(session, tcp->socket);
134 static int scpi_tcp_send(void *priv, const char *command)
136 struct scpi_tcp *tcp = priv;
138 char *terminated_command;
140 terminated_command = g_strdup_printf("%s\r\n", command);
141 len = strlen(terminated_command);
142 out = send(tcp->socket, terminated_command, len, 0);
143 g_free(terminated_command);
146 sr_err("Send error: %s", g_strerror(errno));
151 sr_dbg("Only sent %d/%d bytes of SCPI command: '%s'.", out,
155 sr_spew("Successfully sent SCPI command: '%s'.", command);
160 static int scpi_tcp_read_begin(void *priv)
162 struct scpi_tcp *tcp = priv;
164 tcp->response_bytes_read = 0;
165 tcp->length_bytes_read = 0;
170 static int scpi_tcp_raw_read_data(void *priv, char *buf, int maxlen)
172 struct scpi_tcp *tcp = priv;
175 len = recv(tcp->socket, buf, maxlen, 0);
178 sr_err("Receive error: %s", g_strerror(errno));
182 tcp->length_bytes_read = LENGTH_BYTES;
183 tcp->response_length = len < maxlen ? len : maxlen + 1;
184 tcp->response_bytes_read = len;
189 static int scpi_tcp_rigol_read_data(void *priv, char *buf, int maxlen)
191 struct scpi_tcp *tcp = priv;
194 if (tcp->length_bytes_read < LENGTH_BYTES) {
195 len = recv(tcp->socket, tcp->length_buf + tcp->length_bytes_read,
196 LENGTH_BYTES - tcp->length_bytes_read, 0);
198 sr_err("Receive error: %s", g_strerror(errno));
202 tcp->length_bytes_read += len;
204 if (tcp->length_bytes_read < LENGTH_BYTES)
207 tcp->response_length = RL32(tcp->length_buf);
210 if (tcp->response_bytes_read >= tcp->response_length)
213 len = recv(tcp->socket, buf, maxlen, 0);
216 sr_err("Receive error: %s", g_strerror(errno));
220 tcp->response_bytes_read += len;
225 static int scpi_tcp_read_complete(void *priv)
227 struct scpi_tcp *tcp = priv;
229 return (tcp->length_bytes_read == LENGTH_BYTES &&
230 tcp->response_bytes_read >= tcp->response_length);
233 static int scpi_tcp_close(struct sr_scpi_dev_inst *scpi)
235 struct scpi_tcp *tcp = scpi->priv;
237 if (close(tcp->socket) < 0)
243 static void scpi_tcp_free(void *priv)
245 struct scpi_tcp *tcp = priv;
247 g_free(tcp->address);
251 SR_PRIV const struct sr_scpi_dev_inst scpi_tcp_raw_dev = {
254 .priv_size = sizeof(struct scpi_tcp),
255 .dev_inst_new = scpi_tcp_dev_inst_new,
256 .open = scpi_tcp_open,
257 .source_add = scpi_tcp_source_add,
258 .source_remove = scpi_tcp_source_remove,
259 .send = scpi_tcp_send,
260 .read_begin = scpi_tcp_read_begin,
261 .read_data = scpi_tcp_raw_read_data,
262 .read_complete = scpi_tcp_read_complete,
263 .close = scpi_tcp_close,
264 .free = scpi_tcp_free,
267 SR_PRIV const struct sr_scpi_dev_inst scpi_tcp_rigol_dev = {
269 .prefix = "tcp-rigol",
270 .priv_size = sizeof(struct scpi_tcp),
271 .dev_inst_new = scpi_tcp_dev_inst_new,
272 .open = scpi_tcp_open,
273 .source_add = scpi_tcp_source_add,
274 .source_remove = scpi_tcp_source_remove,
275 .send = scpi_tcp_send,
276 .read_begin = scpi_tcp_read_begin,
277 .read_data = scpi_tcp_rigol_read_data,
278 .read_complete = scpi_tcp_read_complete,
279 .close = scpi_tcp_close,
280 .free = scpi_tcp_free,