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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 | ||
6ec6c43b | 20 | #include <config.h> |
589edd9b | 21 | #ifdef _WIN32 |
0f4a4350 | 22 | #define _WIN32_WINNT 0x0501 |
589edd9b ML |
23 | #include <winsock2.h> |
24 | #include <ws2tcpip.h> | |
25 | #endif | |
08a35913 ML |
26 | #include <glib.h> |
27 | #include <string.h> | |
28 | #include <unistd.h> | |
589edd9b | 29 | #ifndef _WIN32 |
08a35913 ML |
30 | #include <sys/socket.h> |
31 | #include <netinet/in.h> | |
32 | #include <arpa/inet.h> | |
33 | #include <netdb.h> | |
987a0530 | 34 | #endif |
08a35913 | 35 | #include <errno.h> |
c1aae900 | 36 | #include <libsigrok/libsigrok.h> |
515ab088 | 37 | #include "libsigrok-internal.h" |
5a1afc09 | 38 | #include "scpi.h" |
08a35913 | 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 | ||
04229f7b | 75 | static int scpi_tcp_open(struct sr_scpi_dev_inst *scpi) |
08a35913 | 76 | { |
04229f7b | 77 | struct scpi_tcp *tcp = scpi->priv; |
08a35913 ML |
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) { | |
6433156c | 90 | sr_err("Address lookup failed: %s:%s: %s", tcp->address, tcp->port, |
08a35913 ML |
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, | |
7237e912 | 111 | g_strerror(errno)); |
08a35913 ML |
112 | return SR_ERR; |
113 | } | |
114 | ||
115 | return SR_OK; | |
116 | } | |
117 | ||
102f1239 BV |
118 | static int scpi_tcp_source_add(struct sr_session *session, void *priv, |
119 | int events, int timeout, sr_receive_data_callback cb, void *cb_data) | |
08a35913 ML |
120 | { |
121 | struct scpi_tcp *tcp = priv; | |
122 | ||
102f1239 BV |
123 | return sr_session_source_add(session, tcp->socket, events, timeout, |
124 | cb, cb_data); | |
08a35913 ML |
125 | } |
126 | ||
102f1239 | 127 | static int scpi_tcp_source_remove(struct sr_session *session, void *priv) |
08a35913 ML |
128 | { |
129 | struct scpi_tcp *tcp = priv; | |
130 | ||
102f1239 | 131 | return sr_session_source_remove(session, tcp->socket); |
08a35913 ML |
132 | } |
133 | ||
d87c1766 | 134 | static int scpi_tcp_send(void *priv, const char *command) |
08a35913 ML |
135 | { |
136 | struct scpi_tcp *tcp = priv; | |
137 | int len, out; | |
138 | ||
055804e8 SB |
139 | len = strlen(command); |
140 | out = send(tcp->socket, command, len, 0); | |
08a35913 ML |
141 | |
142 | if (out < 0) { | |
7237e912 | 143 | sr_err("Send error: %s", g_strerror(errno)); |
08a35913 ML |
144 | return SR_ERR; |
145 | } | |
146 | ||
147 | if (out < len) { | |
148 | sr_dbg("Only sent %d/%d bytes of SCPI command: '%s'.", out, | |
149 | len, command); | |
150 | } | |
151 | ||
152 | sr_spew("Successfully sent SCPI command: '%s'.", command); | |
153 | ||
154 | return SR_OK; | |
155 | } | |
156 | ||
d87c1766 | 157 | static int scpi_tcp_read_begin(void *priv) |
08a35913 ML |
158 | { |
159 | struct scpi_tcp *tcp = priv; | |
08a35913 | 160 | |
05c644ea ML |
161 | tcp->response_bytes_read = 0; |
162 | tcp->length_bytes_read = 0; | |
08a35913 ML |
163 | |
164 | return SR_OK; | |
165 | } | |
166 | ||
d87c1766 | 167 | static int scpi_tcp_raw_read_data(void *priv, char *buf, int maxlen) |
104ed125 AJ |
168 | { |
169 | struct scpi_tcp *tcp = priv; | |
170 | int len; | |
171 | ||
172 | len = recv(tcp->socket, buf, maxlen, 0); | |
173 | ||
174 | if (len < 0) { | |
7237e912 | 175 | sr_err("Receive error: %s", g_strerror(errno)); |
104ed125 AJ |
176 | return SR_ERR; |
177 | } | |
178 | ||
179 | tcp->length_bytes_read = LENGTH_BYTES; | |
180 | tcp->response_length = len < maxlen ? len : maxlen + 1; | |
181 | tcp->response_bytes_read = len; | |
182 | ||
183 | return len; | |
184 | } | |
185 | ||
d87c1766 | 186 | static int scpi_tcp_rigol_read_data(void *priv, char *buf, int maxlen) |
08a35913 ML |
187 | { |
188 | struct scpi_tcp *tcp = priv; | |
189 | int len; | |
190 | ||
05c644ea ML |
191 | if (tcp->length_bytes_read < LENGTH_BYTES) { |
192 | len = recv(tcp->socket, tcp->length_buf + tcp->length_bytes_read, | |
193 | LENGTH_BYTES - tcp->length_bytes_read, 0); | |
194 | if (len < 0) { | |
7237e912 | 195 | sr_err("Receive error: %s", g_strerror(errno)); |
05c644ea ML |
196 | return SR_ERR; |
197 | } | |
198 | ||
199 | tcp->length_bytes_read += len; | |
200 | ||
201 | if (tcp->length_bytes_read < LENGTH_BYTES) | |
202 | return 0; | |
203 | else | |
204 | tcp->response_length = RL32(tcp->length_buf); | |
205 | } | |
206 | ||
207 | if (tcp->response_bytes_read >= tcp->response_length) | |
208 | return SR_ERR; | |
209 | ||
08a35913 ML |
210 | len = recv(tcp->socket, buf, maxlen, 0); |
211 | ||
212 | if (len < 0) { | |
7237e912 | 213 | sr_err("Receive error: %s", g_strerror(errno)); |
08a35913 ML |
214 | return SR_ERR; |
215 | } | |
216 | ||
05c644ea ML |
217 | tcp->response_bytes_read += len; |
218 | ||
08a35913 ML |
219 | return len; |
220 | } | |
221 | ||
d87c1766 | 222 | static int scpi_tcp_read_complete(void *priv) |
05c644ea ML |
223 | { |
224 | struct scpi_tcp *tcp = priv; | |
225 | ||
226 | return (tcp->length_bytes_read == LENGTH_BYTES && | |
227 | tcp->response_bytes_read >= tcp->response_length); | |
228 | } | |
229 | ||
04229f7b | 230 | static int scpi_tcp_close(struct sr_scpi_dev_inst *scpi) |
08a35913 | 231 | { |
04229f7b | 232 | struct scpi_tcp *tcp = scpi->priv; |
08a35913 ML |
233 | |
234 | if (close(tcp->socket) < 0) | |
235 | return SR_ERR; | |
236 | ||
237 | return SR_OK; | |
238 | } | |
239 | ||
d87c1766 | 240 | static void scpi_tcp_free(void *priv) |
08a35913 ML |
241 | { |
242 | struct scpi_tcp *tcp = priv; | |
243 | ||
244 | g_free(tcp->address); | |
245 | g_free(tcp->port); | |
08a35913 ML |
246 | } |
247 | ||
104ed125 AJ |
248 | SR_PRIV const struct sr_scpi_dev_inst scpi_tcp_raw_dev = { |
249 | .name = "RAW TCP", | |
250 | .prefix = "tcp-raw", | |
251 | .priv_size = sizeof(struct scpi_tcp), | |
252 | .dev_inst_new = scpi_tcp_dev_inst_new, | |
253 | .open = scpi_tcp_open, | |
254 | .source_add = scpi_tcp_source_add, | |
255 | .source_remove = scpi_tcp_source_remove, | |
256 | .send = scpi_tcp_send, | |
257 | .read_begin = scpi_tcp_read_begin, | |
258 | .read_data = scpi_tcp_raw_read_data, | |
259 | .read_complete = scpi_tcp_read_complete, | |
260 | .close = scpi_tcp_close, | |
261 | .free = scpi_tcp_free, | |
262 | }; | |
263 | ||
264 | SR_PRIV const struct sr_scpi_dev_inst scpi_tcp_rigol_dev = { | |
265 | .name = "RIGOL TCP", | |
266 | .prefix = "tcp-rigol", | |
f754c146 AJ |
267 | .priv_size = sizeof(struct scpi_tcp), |
268 | .dev_inst_new = scpi_tcp_dev_inst_new, | |
269 | .open = scpi_tcp_open, | |
270 | .source_add = scpi_tcp_source_add, | |
271 | .source_remove = scpi_tcp_source_remove, | |
272 | .send = scpi_tcp_send, | |
273 | .read_begin = scpi_tcp_read_begin, | |
104ed125 | 274 | .read_data = scpi_tcp_rigol_read_data, |
f754c146 AJ |
275 | .read_complete = scpi_tcp_read_complete, |
276 | .close = scpi_tcp_close, | |
277 | .free = scpi_tcp_free, | |
278 | }; |