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/>.
21 #define _WIN32_WINNT 0x0501
29 #include <sys/socket.h>
30 #include <netinet/in.h>
31 #include <arpa/inet.h>
35 #include "libsigrok.h"
36 #include "libsigrok-internal.h"
38 #define LOG_PREFIX "scpi_tcp"
40 #define LENGTH_BYTES 4
46 char length_buf[LENGTH_BYTES];
47 int length_bytes_read;
49 int response_bytes_read;
52 static int scpi_tcp_dev_inst_new(void *priv, struct drv_context *drvc,
53 const char *resource, char **params, const char *serialcomm)
55 struct scpi_tcp *tcp = priv;
61 if (!params || !params[1] || !params[2]) {
62 sr_err("Invalid parameters.");
66 tcp->address = g_strdup(params[1]);
67 tcp->port = g_strdup(params[2]);
73 static int scpi_tcp_open(void *priv)
75 struct scpi_tcp *tcp = priv;
76 struct addrinfo hints;
77 struct addrinfo *results, *res;
80 memset(&hints, 0, sizeof(hints));
81 hints.ai_family = AF_UNSPEC;
82 hints.ai_socktype = SOCK_STREAM;
83 hints.ai_protocol = IPPROTO_TCP;
85 err = getaddrinfo(tcp->address, tcp->port, &hints, &results);
88 sr_err("Address lookup failed: %s:%d: %s", tcp->address, tcp->port,
93 for (res = results; res; res = res->ai_next) {
94 if ((tcp->socket = socket(res->ai_family, res->ai_socktype,
95 res->ai_protocol)) < 0)
97 if (connect(tcp->socket, res->ai_addr, res->ai_addrlen) != 0) {
105 freeaddrinfo(results);
107 if (tcp->socket < 0) {
108 sr_err("Failed to connect to %s:%s: %s", tcp->address, tcp->port,
116 static int scpi_tcp_source_add(struct sr_session *session, void *priv,
117 int events, int timeout, sr_receive_data_callback cb, void *cb_data)
119 struct scpi_tcp *tcp = priv;
121 return sr_session_source_add(session, tcp->socket, events, timeout,
125 static int scpi_tcp_source_remove(struct sr_session *session, void *priv)
127 struct scpi_tcp *tcp = priv;
129 return sr_session_source_remove(session, tcp->socket);
132 static int scpi_tcp_send(void *priv, const char *command)
134 struct scpi_tcp *tcp = priv;
136 char *terminated_command;
138 terminated_command = g_strdup_printf("%s\r\n", command);
139 len = strlen(terminated_command);
140 out = send(tcp->socket, terminated_command, len, 0);
141 g_free(terminated_command);
144 sr_err("Send error: %s", strerror(errno));
149 sr_dbg("Only sent %d/%d bytes of SCPI command: '%s'.", out,
153 sr_spew("Successfully sent SCPI command: '%s'.", command);
158 static int scpi_tcp_read_begin(void *priv)
160 struct scpi_tcp *tcp = priv;
162 tcp->response_bytes_read = 0;
163 tcp->length_bytes_read = 0;
168 static int scpi_tcp_raw_read_data(void *priv, char *buf, int maxlen)
170 struct scpi_tcp *tcp = priv;
173 len = recv(tcp->socket, buf, maxlen, 0);
176 sr_err("Receive error: %s", strerror(errno));
180 tcp->length_bytes_read = LENGTH_BYTES;
181 tcp->response_length = len < maxlen ? len : maxlen + 1;
182 tcp->response_bytes_read = len;
187 static int scpi_tcp_rigol_read_data(void *priv, char *buf, int maxlen)
189 struct scpi_tcp *tcp = priv;
192 if (tcp->length_bytes_read < LENGTH_BYTES) {
193 len = recv(tcp->socket, tcp->length_buf + tcp->length_bytes_read,
194 LENGTH_BYTES - tcp->length_bytes_read, 0);
196 sr_err("Receive error: %s", strerror(errno));
200 tcp->length_bytes_read += len;
202 if (tcp->length_bytes_read < LENGTH_BYTES)
205 tcp->response_length = RL32(tcp->length_buf);
208 if (tcp->response_bytes_read >= tcp->response_length)
211 len = recv(tcp->socket, buf, maxlen, 0);
214 sr_err("Receive error: %s", strerror(errno));
218 tcp->response_bytes_read += len;
223 static int scpi_tcp_read_complete(void *priv)
225 struct scpi_tcp *tcp = priv;
227 return (tcp->length_bytes_read == LENGTH_BYTES &&
228 tcp->response_bytes_read >= tcp->response_length);
231 static int scpi_tcp_close(void *priv)
233 struct scpi_tcp *tcp = priv;
235 if (close(tcp->socket) < 0)
241 static void scpi_tcp_free(void *priv)
243 struct scpi_tcp *tcp = priv;
245 g_free(tcp->address);
249 SR_PRIV const struct sr_scpi_dev_inst scpi_tcp_raw_dev = {
252 .priv_size = sizeof(struct scpi_tcp),
253 .dev_inst_new = scpi_tcp_dev_inst_new,
254 .open = scpi_tcp_open,
255 .source_add = scpi_tcp_source_add,
256 .source_remove = scpi_tcp_source_remove,
257 .send = scpi_tcp_send,
258 .read_begin = scpi_tcp_read_begin,
259 .read_data = scpi_tcp_raw_read_data,
260 .read_complete = scpi_tcp_read_complete,
261 .close = scpi_tcp_close,
262 .free = scpi_tcp_free,
265 SR_PRIV const struct sr_scpi_dev_inst scpi_tcp_rigol_dev = {
267 .prefix = "tcp-rigol",
268 .priv_size = sizeof(struct scpi_tcp),
269 .dev_inst_new = scpi_tcp_dev_inst_new,
270 .open = scpi_tcp_open,
271 .source_add = scpi_tcp_source_add,
272 .source_remove = scpi_tcp_source_remove,
273 .send = scpi_tcp_send,
274 .read_begin = scpi_tcp_read_begin,
275 .read_data = scpi_tcp_rigol_read_data,
276 .read_complete = scpi_tcp_read_complete,
277 .close = scpi_tcp_close,
278 .free = scpi_tcp_free,