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
26 #include "libsigrok.h"
27 #include "libsigrok-internal.h"
33 #include <sys/socket.h>
34 #include <netinet/in.h>
35 #include <arpa/inet.h>
40 #define LOG_PREFIX "scpi_tcp"
48 SR_PRIV int scpi_tcp_open(void *priv)
50 struct scpi_tcp *tcp = priv;
51 struct addrinfo hints;
52 struct addrinfo *results, *res;
55 memset(&hints, 0, sizeof(hints));
56 hints.ai_family = AF_UNSPEC;
57 hints.ai_socktype = SOCK_STREAM;
58 hints.ai_protocol = IPPROTO_TCP;
60 err = getaddrinfo(tcp->address, tcp->port, &hints, &results);
63 sr_err("Address lookup failed: %s:%d: %s", tcp->address, tcp->port,
68 for (res = results; res; res = res->ai_next) {
69 if ((tcp->socket = socket(res->ai_family, res->ai_socktype,
70 res->ai_protocol)) < 0)
72 if (connect(tcp->socket, res->ai_addr, res->ai_addrlen) != 0) {
80 freeaddrinfo(results);
82 if (tcp->socket < 0) {
83 sr_err("Failed to connect to %s:%s: %s", tcp->address, tcp->port,
91 SR_PRIV int scpi_tcp_source_add(void *priv, int events, int timeout,
92 sr_receive_data_callback_t cb, void *cb_data)
94 struct scpi_tcp *tcp = priv;
96 return sr_source_add(tcp->socket, events, timeout, cb, cb_data);
99 SR_PRIV int scpi_tcp_source_remove(void *priv)
101 struct scpi_tcp *tcp = priv;
103 return sr_source_remove(tcp->socket);
106 SR_PRIV int scpi_tcp_send(void *priv, const char *command)
108 struct scpi_tcp *tcp = priv;
110 char *terminated_command;
112 terminated_command = g_strdup_printf("%s\r\n", command);
113 len = strlen(terminated_command);
114 out = send(tcp->socket, terminated_command, len, 0);
115 g_free(terminated_command);
118 sr_err("Send error: %s", strerror(errno));
123 sr_dbg("Only sent %d/%d bytes of SCPI command: '%s'.", out,
127 sr_spew("Successfully sent SCPI command: '%s'.", command);
132 SR_PRIV int scpi_tcp_receive(void *priv, char **scpi_response)
134 struct scpi_tcp *tcp = priv;
139 response = g_string_sized_new(1024);
141 len = recv(tcp->socket, buf, sizeof(buf), 0);
144 sr_err("Receive error: %s", strerror(errno));
145 g_string_free(response, TRUE);
149 response = g_string_append_len(response, buf + 4, len - 4);
151 *scpi_response = response->str;
153 sr_dbg("SCPI response received (length %d): '%.50s'",
154 response->len, response->str);
156 g_string_free(response, FALSE);
161 SR_PRIV int scpi_tcp_read(void *priv, char *buf, int maxlen)
163 struct scpi_tcp *tcp = priv;
166 len = recv(tcp->socket, buf, maxlen, 0);
169 sr_err("Receive error: %s", strerror(errno));
176 SR_PRIV int scpi_tcp_close(void *priv)
178 struct scpi_tcp *tcp = priv;
180 if (close(tcp->socket) < 0)
186 SR_PRIV void scpi_tcp_free(void *priv)
188 struct scpi_tcp *tcp = priv;
190 g_free(tcp->address);
195 SR_PRIV struct sr_scpi_dev_inst *scpi_tcp_dev_inst_new(const char *address,
198 struct sr_scpi_dev_inst *scpi;
199 struct scpi_tcp *tcp;
201 scpi = g_malloc(sizeof(struct sr_scpi_dev_inst));
202 tcp = g_malloc0(sizeof(struct scpi_tcp));
204 tcp->address = g_strdup(address);
205 tcp->port = g_strdup(port);
208 scpi->open = scpi_tcp_open;
209 scpi->source_add = scpi_tcp_source_add;
210 scpi->source_remove = scpi_tcp_source_remove;
211 scpi->send = scpi_tcp_send;
212 scpi->receive = scpi_tcp_receive;
213 scpi->read = scpi_tcp_read;
214 scpi->close = scpi_tcp_close;
215 scpi->free = scpi_tcp_free;