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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 | ||
3544f848 | 40 | #define LOG_PREFIX "scpi_tcp" |
08a35913 | 41 | |
05c644ea ML |
42 | #define LENGTH_BYTES 4 |
43 | ||
08a35913 ML |
44 | struct scpi_tcp { |
45 | char *address; | |
46 | char *port; | |
47 | int socket; | |
05c644ea ML |
48 | char length_buf[LENGTH_BYTES]; |
49 | int length_bytes_read; | |
50 | int response_length; | |
51 | int response_bytes_read; | |
08a35913 ML |
52 | }; |
53 | ||
17bdda58 AJ |
54 | static int scpi_tcp_dev_inst_new(void *priv, struct drv_context *drvc, |
55 | const char *resource, char **params, const char *serialcomm) | |
f754c146 AJ |
56 | { |
57 | struct scpi_tcp *tcp = priv; | |
58 | ||
17bdda58 | 59 | (void)drvc; |
f754c146 AJ |
60 | (void)resource; |
61 | (void)serialcomm; | |
62 | ||
63 | if (!params || !params[1] || !params[2]) { | |
64 | sr_err("Invalid parameters."); | |
65 | return SR_ERR; | |
66 | } | |
67 | ||
68 | tcp->address = g_strdup(params[1]); | |
69 | tcp->port = g_strdup(params[2]); | |
70 | tcp->socket = -1; | |
71 | ||
72 | return SR_OK; | |
73 | } | |
74 | ||
d87c1766 | 75 | static int scpi_tcp_open(void *priv) |
08a35913 ML |
76 | { |
77 | struct scpi_tcp *tcp = priv; | |
78 | struct addrinfo hints; | |
79 | struct addrinfo *results, *res; | |
80 | int err; | |
81 | ||
82 | memset(&hints, 0, sizeof(hints)); | |
83 | hints.ai_family = AF_UNSPEC; | |
84 | hints.ai_socktype = SOCK_STREAM; | |
85 | hints.ai_protocol = IPPROTO_TCP; | |
86 | ||
87 | err = getaddrinfo(tcp->address, tcp->port, &hints, &results); | |
88 | ||
89 | if (err) { | |
90 | sr_err("Address lookup failed: %s:%d: %s", tcp->address, tcp->port, | |
91 | gai_strerror(err)); | |
92 | return SR_ERR; | |
93 | } | |
94 | ||
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) | |
98 | continue; | |
99 | if (connect(tcp->socket, res->ai_addr, res->ai_addrlen) != 0) { | |
100 | close(tcp->socket); | |
101 | tcp->socket = -1; | |
102 | continue; | |
103 | } | |
104 | break; | |
105 | } | |
106 | ||
107 | freeaddrinfo(results); | |
108 | ||
109 | if (tcp->socket < 0) { | |
110 | sr_err("Failed to connect to %s:%s: %s", tcp->address, tcp->port, | |
111 | strerror(errno)); | |
112 | return SR_ERR; | |
113 | } | |
114 | ||
115 | return SR_OK; | |
116 | } | |
117 | ||
d87c1766 | 118 | static int scpi_tcp_source_add(void *priv, int events, int timeout, |
144f6660 | 119 | sr_receive_data_callback cb, void *cb_data) |
08a35913 ML |
120 | { |
121 | struct scpi_tcp *tcp = priv; | |
122 | ||
123 | return sr_source_add(tcp->socket, events, timeout, cb, cb_data); | |
124 | } | |
125 | ||
d87c1766 | 126 | static int scpi_tcp_source_remove(void *priv) |
08a35913 ML |
127 | { |
128 | struct scpi_tcp *tcp = priv; | |
129 | ||
130 | return sr_source_remove(tcp->socket); | |
131 | } | |
132 | ||
d87c1766 | 133 | static int scpi_tcp_send(void *priv, const char *command) |
08a35913 ML |
134 | { |
135 | struct scpi_tcp *tcp = priv; | |
136 | int len, out; | |
b8705e99 | 137 | char *terminated_command; |
08a35913 | 138 | |
b8705e99 ML |
139 | terminated_command = g_strdup_printf("%s\r\n", command); |
140 | len = strlen(terminated_command); | |
141 | out = send(tcp->socket, terminated_command, len, 0); | |
142 | g_free(terminated_command); | |
08a35913 ML |
143 | |
144 | if (out < 0) { | |
145 | sr_err("Send error: %s", strerror(errno)); | |
146 | return SR_ERR; | |
147 | } | |
148 | ||
149 | if (out < len) { | |
150 | sr_dbg("Only sent %d/%d bytes of SCPI command: '%s'.", out, | |
151 | len, command); | |
152 | } | |
153 | ||
154 | sr_spew("Successfully sent SCPI command: '%s'.", command); | |
155 | ||
156 | return SR_OK; | |
157 | } | |
158 | ||
d87c1766 | 159 | static int scpi_tcp_read_begin(void *priv) |
08a35913 ML |
160 | { |
161 | struct scpi_tcp *tcp = priv; | |
08a35913 | 162 | |
05c644ea ML |
163 | tcp->response_bytes_read = 0; |
164 | tcp->length_bytes_read = 0; | |
08a35913 ML |
165 | |
166 | return SR_OK; | |
167 | } | |
168 | ||
d87c1766 | 169 | static int scpi_tcp_raw_read_data(void *priv, char *buf, int maxlen) |
104ed125 AJ |
170 | { |
171 | struct scpi_tcp *tcp = priv; | |
172 | int len; | |
173 | ||
174 | len = recv(tcp->socket, buf, maxlen, 0); | |
175 | ||
176 | if (len < 0) { | |
177 | sr_err("Receive error: %s", strerror(errno)); | |
178 | return SR_ERR; | |
179 | } | |
180 | ||
181 | tcp->length_bytes_read = LENGTH_BYTES; | |
182 | tcp->response_length = len < maxlen ? len : maxlen + 1; | |
183 | tcp->response_bytes_read = len; | |
184 | ||
185 | return len; | |
186 | } | |
187 | ||
d87c1766 | 188 | static int scpi_tcp_rigol_read_data(void *priv, char *buf, int maxlen) |
08a35913 ML |
189 | { |
190 | struct scpi_tcp *tcp = priv; | |
191 | int len; | |
192 | ||
05c644ea ML |
193 | if (tcp->length_bytes_read < LENGTH_BYTES) { |
194 | len = recv(tcp->socket, tcp->length_buf + tcp->length_bytes_read, | |
195 | LENGTH_BYTES - tcp->length_bytes_read, 0); | |
196 | if (len < 0) { | |
197 | sr_err("Receive error: %s", strerror(errno)); | |
198 | return SR_ERR; | |
199 | } | |
200 | ||
201 | tcp->length_bytes_read += len; | |
202 | ||
203 | if (tcp->length_bytes_read < LENGTH_BYTES) | |
204 | return 0; | |
205 | else | |
206 | tcp->response_length = RL32(tcp->length_buf); | |
207 | } | |
208 | ||
209 | if (tcp->response_bytes_read >= tcp->response_length) | |
210 | return SR_ERR; | |
211 | ||
08a35913 ML |
212 | len = recv(tcp->socket, buf, maxlen, 0); |
213 | ||
214 | if (len < 0) { | |
215 | sr_err("Receive error: %s", strerror(errno)); | |
216 | return SR_ERR; | |
217 | } | |
218 | ||
05c644ea ML |
219 | tcp->response_bytes_read += len; |
220 | ||
08a35913 ML |
221 | return len; |
222 | } | |
223 | ||
d87c1766 | 224 | static int scpi_tcp_read_complete(void *priv) |
05c644ea ML |
225 | { |
226 | struct scpi_tcp *tcp = priv; | |
227 | ||
228 | return (tcp->length_bytes_read == LENGTH_BYTES && | |
229 | tcp->response_bytes_read >= tcp->response_length); | |
230 | } | |
231 | ||
d87c1766 | 232 | static int scpi_tcp_close(void *priv) |
08a35913 ML |
233 | { |
234 | struct scpi_tcp *tcp = priv; | |
235 | ||
236 | if (close(tcp->socket) < 0) | |
237 | return SR_ERR; | |
238 | ||
239 | return SR_OK; | |
240 | } | |
241 | ||
d87c1766 | 242 | static void scpi_tcp_free(void *priv) |
08a35913 ML |
243 | { |
244 | struct scpi_tcp *tcp = priv; | |
245 | ||
246 | g_free(tcp->address); | |
247 | g_free(tcp->port); | |
08a35913 ML |
248 | } |
249 | ||
104ed125 AJ |
250 | SR_PRIV const struct sr_scpi_dev_inst scpi_tcp_raw_dev = { |
251 | .name = "RAW TCP", | |
252 | .prefix = "tcp-raw", | |
253 | .priv_size = sizeof(struct scpi_tcp), | |
254 | .dev_inst_new = scpi_tcp_dev_inst_new, | |
255 | .open = scpi_tcp_open, | |
256 | .source_add = scpi_tcp_source_add, | |
257 | .source_remove = scpi_tcp_source_remove, | |
258 | .send = scpi_tcp_send, | |
259 | .read_begin = scpi_tcp_read_begin, | |
260 | .read_data = scpi_tcp_raw_read_data, | |
261 | .read_complete = scpi_tcp_read_complete, | |
262 | .close = scpi_tcp_close, | |
263 | .free = scpi_tcp_free, | |
264 | }; | |
265 | ||
266 | SR_PRIV const struct sr_scpi_dev_inst scpi_tcp_rigol_dev = { | |
267 | .name = "RIGOL TCP", | |
268 | .prefix = "tcp-rigol", | |
f754c146 AJ |
269 | .priv_size = sizeof(struct scpi_tcp), |
270 | .dev_inst_new = scpi_tcp_dev_inst_new, | |
271 | .open = scpi_tcp_open, | |
272 | .source_add = scpi_tcp_source_add, | |
273 | .source_remove = scpi_tcp_source_remove, | |
274 | .send = scpi_tcp_send, | |
275 | .read_begin = scpi_tcp_read_begin, | |
104ed125 | 276 | .read_data = scpi_tcp_rigol_read_data, |
f754c146 AJ |
277 | .read_complete = scpi_tcp_read_complete, |
278 | .close = scpi_tcp_close, | |
279 | .free = scpi_tcp_free, | |
280 | }; |