+++ /dev/null
-/*
- * This file is part of the libsigrok project.
- *
- * Copyright (C) 2013 Martin Ling <martin-sigrok@earth.li>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "libsigrok.h"
-#include "libsigrok-internal.h"
-
-#include <glib.h>
-#include <string.h>
-#include <unistd.h>
-#ifdef _WIN32
-#include <winsock2.h>
-#include <ws2tcpip.h>
-#else
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <netdb.h>
-#endif
-#include <errno.h>
-
-/* Message logging helpers with subsystem-specific prefix string. */
-#define LOG_PREFIX "scpi_tcp: "
-#define sr_log(l, s, args...) sr_log(l, LOG_PREFIX s, ## args)
-#define sr_spew(s, args...) sr_spew(LOG_PREFIX s, ## args)
-#define sr_dbg(s, args...) sr_dbg(LOG_PREFIX s, ## args)
-#define sr_info(s, args...) sr_info(LOG_PREFIX s, ## args)
-#define sr_warn(s, args...) sr_warn(LOG_PREFIX s, ## args)
-
-struct scpi_tcp {
- char *address;
- char *port;
- int socket;
-};
-
-SR_PRIV int scpi_tcp_open(void *priv)
-{
- struct scpi_tcp *tcp = priv;
- struct addrinfo hints;
- struct addrinfo *results, *res;
- int err;
-
- memset(&hints, 0, sizeof(hints));
- hints.ai_family = AF_UNSPEC;
- hints.ai_socktype = SOCK_STREAM;
- hints.ai_protocol = IPPROTO_TCP;
-
- err = getaddrinfo(tcp->address, tcp->port, &hints, &results);
-
- if (err) {
- sr_err("Address lookup failed: %s:%d: %s", tcp->address, tcp->port,
- gai_strerror(err));
- return SR_ERR;
- }
-
- for (res = results; res; res = res->ai_next) {
- if ((tcp->socket = socket(res->ai_family, res->ai_socktype,
- res->ai_protocol)) < 0)
- continue;
- if (connect(tcp->socket, res->ai_addr, res->ai_addrlen) != 0) {
- close(tcp->socket);
- tcp->socket = -1;
- continue;
- }
- break;
- }
-
- freeaddrinfo(results);
-
- if (tcp->socket < 0) {
- sr_err("Failed to connect to %s:%s: %s", tcp->address, tcp->port,
- strerror(errno));
- return SR_ERR;
- }
-
- return SR_OK;
-}
-
-SR_PRIV int scpi_tcp_source_add(void *priv, int events, int timeout,
- sr_receive_data_callback_t cb, void *cb_data)
-{
- struct scpi_tcp *tcp = priv;
-
- return sr_source_add(tcp->socket, events, timeout, cb, cb_data);
-}
-
-SR_PRIV int scpi_tcp_source_remove(void *priv)
-{
- struct scpi_tcp *tcp = priv;
-
- return sr_source_remove(tcp->socket);
-}
-
-SR_PRIV int scpi_tcp_send(void *priv, const char *command)
-{
- struct scpi_tcp *tcp = priv;
- int len, out;
- char *terminated_command;
-
- terminated_command = g_strdup_printf("%s\r\n", command);
- len = strlen(terminated_command);
- out = send(tcp->socket, terminated_command, len, 0);
- g_free(terminated_command);
-
- if (out < 0) {
- sr_err("Send error: %s", strerror(errno));
- return SR_ERR;
- }
-
- if (out < len) {
- sr_dbg("Only sent %d/%d bytes of SCPI command: '%s'.", out,
- len, command);
- }
-
- sr_spew("Successfully sent SCPI command: '%s'.", command);
-
- return SR_OK;
-}
-
-SR_PRIV int scpi_tcp_receive(void *priv, char **scpi_response)
-{
- struct scpi_tcp *tcp = priv;
- GString *response;
- char buf[256];
- int len;
-
- response = g_string_sized_new(1024);
-
- len = recv(tcp->socket, buf, sizeof(buf), 0);
-
- if (len < 0) {
- sr_err("Receive error: %s", strerror(errno));
- g_string_free(response, TRUE);
- return SR_ERR;
- }
-
- response = g_string_append_len(response, buf + 4, len - 4);
-
- *scpi_response = response->str;
-
- sr_dbg("SCPI response received (length %d): '%.50s'",
- response->len, response->str);
-
- g_string_free(response, FALSE);
-
- return SR_OK;
-}
-
-SR_PRIV int scpi_tcp_read(void *priv, char *buf, int maxlen)
-{
- struct scpi_tcp *tcp = priv;
- int len;
-
- len = recv(tcp->socket, buf, maxlen, 0);
-
- if (len < 0) {
- sr_err("Receive error: %s", strerror(errno));
- return SR_ERR;
- }
-
- return len;
-}
-
-SR_PRIV int scpi_tcp_close(void *priv)
-{
- struct scpi_tcp *tcp = priv;
-
- if (close(tcp->socket) < 0)
- return SR_ERR;
-
- return SR_OK;
-}
-
-SR_PRIV void scpi_tcp_free(void *priv)
-{
- struct scpi_tcp *tcp = priv;
-
- g_free(tcp->address);
- g_free(tcp->port);
- g_free(tcp);
-}
-
-SR_PRIV struct sr_scpi_dev_inst *scpi_tcp_dev_inst_new(const char *address,
- const char *port)
-{
- struct sr_scpi_dev_inst *scpi;
- struct scpi_tcp *tcp;
-
- scpi = g_malloc(sizeof(struct sr_scpi_dev_inst));
- tcp = g_malloc0(sizeof(struct scpi_tcp));
-
- tcp->address = g_strdup(address);
- tcp->port = g_strdup(port);
- tcp->socket = -1;
-
- scpi->open = scpi_tcp_open;
- scpi->source_add = scpi_tcp_source_add;
- scpi->source_remove = scpi_tcp_source_remove;
- scpi->send = scpi_tcp_send;
- scpi->receive = scpi_tcp_receive;
- scpi->read = scpi_tcp_read;
- scpi->close = scpi_tcp_close;
- scpi->free = scpi_tcp_free;
- scpi->priv = tcp;
-
- return scpi;
-}
projects / libsigrok.git / blobdiff