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08a35913 ML |
1 | /* |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2013 Martin Ling <martin-sigrok@earth.li> | |
5 | * | |
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. | |
10 | * | |
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. | |
15 | * | |
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/>. | |
18 | */ | |
19 | ||
589edd9b | 20 | #ifdef _WIN32 |
0f4a4350 | 21 | #define _WIN32_WINNT 0x0501 |
589edd9b ML |
22 | #include <winsock2.h> |
23 | #include <ws2tcpip.h> | |
24 | #endif | |
0f4a4350 | 25 | |
08a35913 ML |
26 | #include "libsigrok.h" |
27 | #include "libsigrok-internal.h" | |
28 | ||
29 | #include <glib.h> | |
30 | #include <string.h> | |
31 | #include <unistd.h> | |
589edd9b | 32 | #ifndef _WIN32 |
08a35913 ML |
33 | #include <sys/socket.h> |
34 | #include <netinet/in.h> | |
35 | #include <arpa/inet.h> | |
36 | #include <netdb.h> | |
987a0530 | 37 | #endif |
08a35913 ML |
38 | #include <errno.h> |
39 | ||
40 | /* Message logging helpers with subsystem-specific prefix string. */ | |
41 | #define LOG_PREFIX "scpi_tcp: " | |
42 | #define sr_log(l, s, args...) sr_log(l, LOG_PREFIX s, ## args) | |
43 | #define sr_spew(s, args...) sr_spew(LOG_PREFIX s, ## args) | |
44 | #define sr_dbg(s, args...) sr_dbg(LOG_PREFIX s, ## args) | |
45 | #define sr_info(s, args...) sr_info(LOG_PREFIX s, ## args) | |
46 | #define sr_warn(s, args...) sr_warn(LOG_PREFIX s, ## args) | |
47 | ||
48 | struct scpi_tcp { | |
49 | char *address; | |
50 | char *port; | |
51 | int socket; | |
52 | }; | |
53 | ||
54 | SR_PRIV int scpi_tcp_open(void *priv) | |
55 | { | |
56 | struct scpi_tcp *tcp = priv; | |
57 | struct addrinfo hints; | |
58 | struct addrinfo *results, *res; | |
59 | int err; | |
60 | ||
61 | memset(&hints, 0, sizeof(hints)); | |
62 | hints.ai_family = AF_UNSPEC; | |
63 | hints.ai_socktype = SOCK_STREAM; | |
64 | hints.ai_protocol = IPPROTO_TCP; | |
65 | ||
66 | err = getaddrinfo(tcp->address, tcp->port, &hints, &results); | |
67 | ||
68 | if (err) { | |
69 | sr_err("Address lookup failed: %s:%d: %s", tcp->address, tcp->port, | |
70 | gai_strerror(err)); | |
71 | return SR_ERR; | |
72 | } | |
73 | ||
74 | for (res = results; res; res = res->ai_next) { | |
75 | if ((tcp->socket = socket(res->ai_family, res->ai_socktype, | |
76 | res->ai_protocol)) < 0) | |
77 | continue; | |
78 | if (connect(tcp->socket, res->ai_addr, res->ai_addrlen) != 0) { | |
79 | close(tcp->socket); | |
80 | tcp->socket = -1; | |
81 | continue; | |
82 | } | |
83 | break; | |
84 | } | |
85 | ||
86 | freeaddrinfo(results); | |
87 | ||
88 | if (tcp->socket < 0) { | |
89 | sr_err("Failed to connect to %s:%s: %s", tcp->address, tcp->port, | |
90 | strerror(errno)); | |
91 | return SR_ERR; | |
92 | } | |
93 | ||
94 | return SR_OK; | |
95 | } | |
96 | ||
97 | SR_PRIV int scpi_tcp_source_add(void *priv, int events, int timeout, | |
98 | sr_receive_data_callback_t cb, void *cb_data) | |
99 | { | |
100 | struct scpi_tcp *tcp = priv; | |
101 | ||
102 | return sr_source_add(tcp->socket, events, timeout, cb, cb_data); | |
103 | } | |
104 | ||
105 | SR_PRIV int scpi_tcp_source_remove(void *priv) | |
106 | { | |
107 | struct scpi_tcp *tcp = priv; | |
108 | ||
109 | return sr_source_remove(tcp->socket); | |
110 | } | |
111 | ||
112 | SR_PRIV int scpi_tcp_send(void *priv, const char *command) | |
113 | { | |
114 | struct scpi_tcp *tcp = priv; | |
115 | int len, out; | |
b8705e99 | 116 | char *terminated_command; |
08a35913 | 117 | |
b8705e99 ML |
118 | terminated_command = g_strdup_printf("%s\r\n", command); |
119 | len = strlen(terminated_command); | |
120 | out = send(tcp->socket, terminated_command, len, 0); | |
121 | g_free(terminated_command); | |
08a35913 ML |
122 | |
123 | if (out < 0) { | |
124 | sr_err("Send error: %s", strerror(errno)); | |
125 | return SR_ERR; | |
126 | } | |
127 | ||
128 | if (out < len) { | |
129 | sr_dbg("Only sent %d/%d bytes of SCPI command: '%s'.", out, | |
130 | len, command); | |
131 | } | |
132 | ||
133 | sr_spew("Successfully sent SCPI command: '%s'.", command); | |
134 | ||
135 | return SR_OK; | |
136 | } | |
137 | ||
138 | SR_PRIV int scpi_tcp_receive(void *priv, char **scpi_response) | |
139 | { | |
140 | struct scpi_tcp *tcp = priv; | |
141 | GString *response; | |
142 | char buf[256]; | |
143 | int len; | |
144 | ||
145 | response = g_string_sized_new(1024); | |
146 | ||
147 | len = recv(tcp->socket, buf, sizeof(buf), 0); | |
148 | ||
149 | if (len < 0) { | |
150 | sr_err("Receive error: %s", strerror(errno)); | |
151 | g_string_free(response, TRUE); | |
152 | return SR_ERR; | |
153 | } | |
154 | ||
b8705e99 | 155 | response = g_string_append_len(response, buf + 4, len - 4); |
08a35913 ML |
156 | |
157 | *scpi_response = response->str; | |
158 | ||
159 | sr_dbg("SCPI response received (length %d): '%.50s'", | |
160 | response->len, response->str); | |
161 | ||
162 | g_string_free(response, FALSE); | |
163 | ||
164 | return SR_OK; | |
165 | } | |
166 | ||
167 | SR_PRIV int scpi_tcp_read(void *priv, char *buf, int maxlen) | |
168 | { | |
169 | struct scpi_tcp *tcp = priv; | |
170 | int len; | |
171 | ||
172 | len = recv(tcp->socket, buf, maxlen, 0); | |
173 | ||
174 | if (len < 0) { | |
175 | sr_err("Receive error: %s", strerror(errno)); | |
176 | return SR_ERR; | |
177 | } | |
178 | ||
179 | return len; | |
180 | } | |
181 | ||
182 | SR_PRIV int scpi_tcp_close(void *priv) | |
183 | { | |
184 | struct scpi_tcp *tcp = priv; | |
185 | ||
186 | if (close(tcp->socket) < 0) | |
187 | return SR_ERR; | |
188 | ||
189 | return SR_OK; | |
190 | } | |
191 | ||
192 | SR_PRIV void scpi_tcp_free(void *priv) | |
193 | { | |
194 | struct scpi_tcp *tcp = priv; | |
195 | ||
196 | g_free(tcp->address); | |
197 | g_free(tcp->port); | |
198 | g_free(tcp); | |
199 | } | |
200 | ||
201 | SR_PRIV struct sr_scpi_dev_inst *scpi_tcp_dev_inst_new(const char *address, | |
202 | const char *port) | |
203 | { | |
204 | struct sr_scpi_dev_inst *scpi; | |
205 | struct scpi_tcp *tcp; | |
206 | ||
207 | scpi = g_malloc(sizeof(struct sr_scpi_dev_inst)); | |
208 | tcp = g_malloc0(sizeof(struct scpi_tcp)); | |
209 | ||
210 | tcp->address = g_strdup(address); | |
211 | tcp->port = g_strdup(port); | |
212 | tcp->socket = -1; | |
213 | ||
214 | scpi->open = scpi_tcp_open; | |
215 | scpi->source_add = scpi_tcp_source_add; | |
216 | scpi->source_remove = scpi_tcp_source_remove; | |
217 | scpi->send = scpi_tcp_send; | |
218 | scpi->receive = scpi_tcp_receive; | |
219 | scpi->read = scpi_tcp_read; | |
220 | scpi->close = scpi_tcp_close; | |
221 | scpi->free = scpi_tcp_free; | |
222 | scpi->priv = tcp; | |
223 | ||
224 | return scpi; | |
225 | } |