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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 | ||
20 | #ifdef _WIN32 | |
21 | #define _WIN32_WINNT 0x0501 | |
22 | #include <winsock2.h> | |
23 | #include <ws2tcpip.h> | |
24 | #endif | |
25 | ||
26 | #include "libsigrok.h" | |
27 | #include "libsigrok-internal.h" | |
28 | ||
29 | #include <glib.h> | |
30 | #include <string.h> | |
31 | #include <unistd.h> | |
32 | #ifndef _WIN32 | |
33 | #include <sys/socket.h> | |
34 | #include <netinet/in.h> | |
35 | #include <arpa/inet.h> | |
36 | #include <netdb.h> | |
37 | #endif | |
38 | #include <errno.h> | |
39 | ||
40 | #define LOG_PREFIX "scpi_tcp" | |
41 | ||
42 | #define LENGTH_BYTES 4 | |
43 | ||
44 | struct scpi_tcp { | |
45 | char *address; | |
46 | char *port; | |
47 | int socket; | |
48 | char length_buf[LENGTH_BYTES]; | |
49 | int length_bytes_read; | |
50 | int response_length; | |
51 | int response_bytes_read; | |
52 | }; | |
53 | ||
54 | static int scpi_tcp_dev_inst_new(void *priv, const char *resource, | |
55 | char **params, const char *serialcomm) | |
56 | { | |
57 | struct scpi_tcp *tcp = priv; | |
58 | ||
59 | (void)resource; | |
60 | (void)serialcomm; | |
61 | ||
62 | if (!params || !params[1] || !params[2]) { | |
63 | sr_err("Invalid parameters."); | |
64 | return SR_ERR; | |
65 | } | |
66 | ||
67 | tcp->address = g_strdup(params[1]); | |
68 | tcp->port = g_strdup(params[2]); | |
69 | tcp->socket = -1; | |
70 | ||
71 | return SR_OK; | |
72 | } | |
73 | ||
74 | SR_PRIV int scpi_tcp_open(void *priv) | |
75 | { | |
76 | struct scpi_tcp *tcp = priv; | |
77 | struct addrinfo hints; | |
78 | struct addrinfo *results, *res; | |
79 | int err; | |
80 | ||
81 | memset(&hints, 0, sizeof(hints)); | |
82 | hints.ai_family = AF_UNSPEC; | |
83 | hints.ai_socktype = SOCK_STREAM; | |
84 | hints.ai_protocol = IPPROTO_TCP; | |
85 | ||
86 | err = getaddrinfo(tcp->address, tcp->port, &hints, &results); | |
87 | ||
88 | if (err) { | |
89 | sr_err("Address lookup failed: %s:%d: %s", tcp->address, tcp->port, | |
90 | gai_strerror(err)); | |
91 | return SR_ERR; | |
92 | } | |
93 | ||
94 | for (res = results; res; res = res->ai_next) { | |
95 | if ((tcp->socket = socket(res->ai_family, res->ai_socktype, | |
96 | res->ai_protocol)) < 0) | |
97 | continue; | |
98 | if (connect(tcp->socket, res->ai_addr, res->ai_addrlen) != 0) { | |
99 | close(tcp->socket); | |
100 | tcp->socket = -1; | |
101 | continue; | |
102 | } | |
103 | break; | |
104 | } | |
105 | ||
106 | freeaddrinfo(results); | |
107 | ||
108 | if (tcp->socket < 0) { | |
109 | sr_err("Failed to connect to %s:%s: %s", tcp->address, tcp->port, | |
110 | strerror(errno)); | |
111 | return SR_ERR; | |
112 | } | |
113 | ||
114 | return SR_OK; | |
115 | } | |
116 | ||
117 | SR_PRIV int scpi_tcp_source_add(void *priv, int events, int timeout, | |
118 | sr_receive_data_callback_t cb, void *cb_data) | |
119 | { | |
120 | struct scpi_tcp *tcp = priv; | |
121 | ||
122 | return sr_source_add(tcp->socket, events, timeout, cb, cb_data); | |
123 | } | |
124 | ||
125 | SR_PRIV int scpi_tcp_source_remove(void *priv) | |
126 | { | |
127 | struct scpi_tcp *tcp = priv; | |
128 | ||
129 | return sr_source_remove(tcp->socket); | |
130 | } | |
131 | ||
132 | SR_PRIV int scpi_tcp_send(void *priv, const char *command) | |
133 | { | |
134 | struct scpi_tcp *tcp = priv; | |
135 | int len, out; | |
136 | char *terminated_command; | |
137 | ||
138 | terminated_command = g_strdup_printf("%s\r\n", command); | |
139 | len = strlen(terminated_command); | |
140 | out = send(tcp->socket, terminated_command, len, 0); | |
141 | g_free(terminated_command); | |
142 | ||
143 | if (out < 0) { | |
144 | sr_err("Send error: %s", strerror(errno)); | |
145 | return SR_ERR; | |
146 | } | |
147 | ||
148 | if (out < len) { | |
149 | sr_dbg("Only sent %d/%d bytes of SCPI command: '%s'.", out, | |
150 | len, command); | |
151 | } | |
152 | ||
153 | sr_spew("Successfully sent SCPI command: '%s'.", command); | |
154 | ||
155 | return SR_OK; | |
156 | } | |
157 | ||
158 | SR_PRIV int scpi_tcp_read_begin(void *priv) | |
159 | { | |
160 | struct scpi_tcp *tcp = priv; | |
161 | ||
162 | tcp->response_bytes_read = 0; | |
163 | tcp->length_bytes_read = 0; | |
164 | ||
165 | return SR_OK; | |
166 | } | |
167 | ||
168 | SR_PRIV int scpi_tcp_raw_read_data(void *priv, char *buf, int maxlen) | |
169 | { | |
170 | struct scpi_tcp *tcp = priv; | |
171 | int len; | |
172 | ||
173 | len = recv(tcp->socket, buf, maxlen, 0); | |
174 | ||
175 | if (len < 0) { | |
176 | sr_err("Receive error: %s", strerror(errno)); | |
177 | return SR_ERR; | |
178 | } | |
179 | ||
180 | tcp->length_bytes_read = LENGTH_BYTES; | |
181 | tcp->response_length = len < maxlen ? len : maxlen + 1; | |
182 | tcp->response_bytes_read = len; | |
183 | ||
184 | return len; | |
185 | } | |
186 | ||
187 | SR_PRIV int scpi_tcp_rigol_read_data(void *priv, char *buf, int maxlen) | |
188 | { | |
189 | struct scpi_tcp *tcp = priv; | |
190 | int len; | |
191 | ||
192 | if (tcp->length_bytes_read < LENGTH_BYTES) { | |
193 | len = recv(tcp->socket, tcp->length_buf + tcp->length_bytes_read, | |
194 | LENGTH_BYTES - tcp->length_bytes_read, 0); | |
195 | if (len < 0) { | |
196 | sr_err("Receive error: %s", strerror(errno)); | |
197 | return SR_ERR; | |
198 | } | |
199 | ||
200 | tcp->length_bytes_read += len; | |
201 | ||
202 | if (tcp->length_bytes_read < LENGTH_BYTES) | |
203 | return 0; | |
204 | else | |
205 | tcp->response_length = RL32(tcp->length_buf); | |
206 | } | |
207 | ||
208 | if (tcp->response_bytes_read >= tcp->response_length) | |
209 | return SR_ERR; | |
210 | ||
211 | len = recv(tcp->socket, buf, maxlen, 0); | |
212 | ||
213 | if (len < 0) { | |
214 | sr_err("Receive error: %s", strerror(errno)); | |
215 | return SR_ERR; | |
216 | } | |
217 | ||
218 | tcp->response_bytes_read += len; | |
219 | ||
220 | return len; | |
221 | } | |
222 | ||
223 | SR_PRIV int scpi_tcp_read_complete(void *priv) | |
224 | { | |
225 | struct scpi_tcp *tcp = priv; | |
226 | ||
227 | return (tcp->length_bytes_read == LENGTH_BYTES && | |
228 | tcp->response_bytes_read >= tcp->response_length); | |
229 | } | |
230 | ||
231 | SR_PRIV int scpi_tcp_close(void *priv) | |
232 | { | |
233 | struct scpi_tcp *tcp = priv; | |
234 | ||
235 | if (close(tcp->socket) < 0) | |
236 | return SR_ERR; | |
237 | ||
238 | return SR_OK; | |
239 | } | |
240 | ||
241 | SR_PRIV void scpi_tcp_free(void *priv) | |
242 | { | |
243 | struct scpi_tcp *tcp = priv; | |
244 | ||
245 | g_free(tcp->address); | |
246 | g_free(tcp->port); | |
247 | } | |
248 | ||
249 | SR_PRIV const struct sr_scpi_dev_inst scpi_tcp_raw_dev = { | |
250 | .name = "RAW TCP", | |
251 | .prefix = "tcp-raw", | |
252 | .priv_size = sizeof(struct scpi_tcp), | |
253 | .dev_inst_new = scpi_tcp_dev_inst_new, | |
254 | .open = scpi_tcp_open, | |
255 | .source_add = scpi_tcp_source_add, | |
256 | .source_remove = scpi_tcp_source_remove, | |
257 | .send = scpi_tcp_send, | |
258 | .read_begin = scpi_tcp_read_begin, | |
259 | .read_data = scpi_tcp_raw_read_data, | |
260 | .read_complete = scpi_tcp_read_complete, | |
261 | .close = scpi_tcp_close, | |
262 | .free = scpi_tcp_free, | |
263 | }; | |
264 | ||
265 | SR_PRIV const struct sr_scpi_dev_inst scpi_tcp_rigol_dev = { | |
266 | .name = "RIGOL TCP", | |
267 | .prefix = "tcp-rigol", | |
268 | .priv_size = sizeof(struct scpi_tcp), | |
269 | .dev_inst_new = scpi_tcp_dev_inst_new, | |
270 | .open = scpi_tcp_open, | |
271 | .source_add = scpi_tcp_source_add, | |
272 | .source_remove = scpi_tcp_source_remove, | |
273 | .send = scpi_tcp_send, | |
274 | .read_begin = scpi_tcp_read_begin, | |
275 | .read_data = scpi_tcp_rigol_read_data, | |
276 | .read_complete = scpi_tcp_read_complete, | |
277 | .close = scpi_tcp_close, | |
278 | .free = scpi_tcp_free, | |
279 | }; |