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1 | /* | |
2 | * "$Id: network.c 11971 2014-07-01 14:38:29Z msweet $" | |
3 | * | |
4 | * Common backend network APIs for CUPS. | |
5 | * | |
6 | * Copyright 2007-2011 by Apple Inc. | |
7 | * Copyright 2006-2007 by Easy Software Products, all rights reserved. | |
8 | * | |
9 | * These coded instructions, statements, and computer programs are the | |
10 | * property of Apple Inc. and are protected by Federal copyright | |
11 | * law. Distribution and use rights are outlined in the file "LICENSE.txt" | |
12 | * "LICENSE" which should have been included with this file. If this | |
13 | * file is missing or damaged, see the license at "http://www.cups.org/". | |
14 | * | |
15 | * This file is subject to the Apple OS-Developed Software exception. | |
16 | * | |
17 | * Contents: | |
18 | * | |
19 | * backendCheckSideChannel() - Check the side-channel for pending requests. | |
20 | * backendNetworkSideCB() - Handle common network side-channel commands. | |
21 | */ | |
22 | ||
23 | /* | |
24 | * Include necessary headers. | |
25 | */ | |
26 | ||
27 | #include "backend-private.h" | |
28 | #include <limits.h> | |
29 | #ifdef __hpux | |
30 | # include <sys/time.h> | |
31 | #else | |
32 | # include <sys/select.h> | |
33 | #endif /* __hpux */ | |
34 | ||
35 | ||
36 | /* | |
37 | * 'backendCheckSideChannel()' - Check the side-channel for pending requests. | |
38 | */ | |
39 | ||
40 | ||
41 | void | |
42 | backendCheckSideChannel( | |
43 | int snmp_fd, /* I - SNMP socket */ | |
44 | http_addr_t *addr) /* I - Address of device */ | |
45 | { | |
46 | fd_set input; /* Select input set */ | |
47 | struct timeval timeout; /* Select timeout */ | |
48 | ||
49 | ||
50 | FD_ZERO(&input); | |
51 | FD_SET(CUPS_SC_FD, &input); | |
52 | ||
53 | timeout.tv_sec = timeout.tv_usec = 0; | |
54 | ||
55 | if (select(CUPS_SC_FD + 1, &input, NULL, NULL, &timeout) > 0) | |
56 | backendNetworkSideCB(-1, -1, snmp_fd, addr, 0); | |
57 | } | |
58 | ||
59 | ||
60 | /* | |
61 | * 'backendNetworkSideCB()' - Handle common network side-channel commands. | |
62 | */ | |
63 | ||
64 | int /* O - -1 on error, 0 on success */ | |
65 | backendNetworkSideCB( | |
66 | int print_fd, /* I - Print file or -1 */ | |
67 | int device_fd, /* I - Device file or -1 */ | |
68 | int snmp_fd, /* I - SNMP socket */ | |
69 | http_addr_t *addr, /* I - Address of device */ | |
70 | int use_bc) /* I - Use back-channel data? */ | |
71 | { | |
72 | cups_sc_command_t command; /* Request command */ | |
73 | cups_sc_status_t status; /* Request/response status */ | |
74 | char data[65536]; /* Request/response data */ | |
75 | int datalen; /* Request/response data size */ | |
76 | const char *device_id; /* 1284DEVICEID env var */ | |
77 | ||
78 | ||
79 | datalen = sizeof(data); | |
80 | ||
81 | if (cupsSideChannelRead(&command, &status, data, &datalen, 1.0)) | |
82 | return (-1); | |
83 | ||
84 | switch (command) | |
85 | { | |
86 | case CUPS_SC_CMD_DRAIN_OUTPUT : | |
87 | /* | |
88 | * Our sockets disable the Nagle algorithm and data is sent immediately. | |
89 | */ | |
90 | ||
91 | if (device_fd < 0) | |
92 | status = CUPS_SC_STATUS_NOT_IMPLEMENTED; | |
93 | else if (backendDrainOutput(print_fd, device_fd)) | |
94 | status = CUPS_SC_STATUS_IO_ERROR; | |
95 | else | |
96 | status = CUPS_SC_STATUS_OK; | |
97 | ||
98 | datalen = 0; | |
99 | break; | |
100 | ||
101 | case CUPS_SC_CMD_GET_BIDI : | |
102 | status = CUPS_SC_STATUS_OK; | |
103 | data[0] = use_bc; | |
104 | datalen = 1; | |
105 | break; | |
106 | ||
107 | case CUPS_SC_CMD_SNMP_GET : | |
108 | case CUPS_SC_CMD_SNMP_GET_NEXT : | |
109 | fprintf(stderr, "DEBUG: CUPS_SC_CMD_SNMP_%s: %d (%s)\n", | |
110 | command == CUPS_SC_CMD_SNMP_GET ? "GET" : "GET_NEXT", datalen, | |
111 | data); | |
112 | ||
113 | if (datalen < 2) | |
114 | { | |
115 | status = CUPS_SC_STATUS_BAD_MESSAGE; | |
116 | datalen = 0; | |
117 | break; | |
118 | } | |
119 | ||
120 | if (snmp_fd >= 0) | |
121 | { | |
122 | char *dataptr; /* Pointer into data */ | |
123 | cups_snmp_t packet; /* Packet from printer */ | |
124 | const char *snmp_value; /* CUPS_SNMP_VALUE env var */ | |
125 | ||
126 | if ((snmp_value = getenv("CUPS_SNMP_VALUE")) != NULL) | |
127 | { | |
128 | const char *snmp_count; /* CUPS_SNMP_COUNT env var */ | |
129 | int count; /* Repetition count */ | |
130 | ||
131 | if ((snmp_count = getenv("CUPS_SNMP_COUNT")) != NULL) | |
132 | { | |
133 | if ((count = atoi(snmp_count)) <= 0) | |
134 | count = 1; | |
135 | } | |
136 | else | |
137 | count = 1; | |
138 | ||
139 | for (dataptr = data + strlen(data) + 1; | |
140 | count > 0 && dataptr < (data + sizeof(data) - 1); | |
141 | count --, dataptr += strlen(dataptr)) | |
142 | strlcpy(dataptr, snmp_value, sizeof(data) - (dataptr - data)); | |
143 | ||
144 | fprintf(stderr, "DEBUG: Returning %s %s\n", data, | |
145 | data + strlen(data) + 1); | |
146 | ||
147 | status = CUPS_SC_STATUS_OK; | |
148 | datalen = dataptr - data; | |
149 | break; | |
150 | } | |
151 | ||
152 | if (!_cupsSNMPStringToOID(data, packet.object_name, CUPS_SNMP_MAX_OID)) | |
153 | { | |
154 | status = CUPS_SC_STATUS_BAD_MESSAGE; | |
155 | datalen = 0; | |
156 | break; | |
157 | } | |
158 | ||
159 | status = CUPS_SC_STATUS_IO_ERROR; | |
160 | datalen = 0; | |
161 | ||
162 | if (_cupsSNMPWrite(snmp_fd, addr, CUPS_SNMP_VERSION_1, | |
163 | _cupsSNMPDefaultCommunity(), | |
164 | command == CUPS_SC_CMD_SNMP_GET ? | |
165 | CUPS_ASN1_GET_REQUEST : | |
166 | CUPS_ASN1_GET_NEXT_REQUEST, 1, | |
167 | packet.object_name)) | |
168 | { | |
169 | if (_cupsSNMPRead(snmp_fd, &packet, 1.0)) | |
170 | { | |
171 | int i; /* Looping var */ | |
172 | ||
173 | ||
174 | if (!_cupsSNMPOIDToString(packet.object_name, data, sizeof(data))) | |
175 | { | |
176 | fputs("DEBUG: Bad OID returned!\n", stderr); | |
177 | break; | |
178 | } | |
179 | ||
180 | datalen = (int)strlen(data) + 1; | |
181 | dataptr = data + datalen; | |
182 | ||
183 | switch (packet.object_type) | |
184 | { | |
185 | case CUPS_ASN1_BOOLEAN : | |
186 | snprintf(dataptr, sizeof(data) - (dataptr - data), "%d", | |
187 | packet.object_value.boolean); | |
188 | datalen += (int)strlen(dataptr); | |
189 | break; | |
190 | ||
191 | case CUPS_ASN1_INTEGER : | |
192 | snprintf(dataptr, sizeof(data) - (dataptr - data), "%d", | |
193 | packet.object_value.integer); | |
194 | datalen += (int)strlen(dataptr); | |
195 | break; | |
196 | ||
197 | case CUPS_ASN1_BIT_STRING : | |
198 | case CUPS_ASN1_OCTET_STRING : | |
199 | if (packet.object_value.string.num_bytes < 0) | |
200 | i = 0; | |
201 | else if (packet.object_value.string.num_bytes < | |
202 | (sizeof(data) - (dataptr - data))) | |
203 | i = packet.object_value.string.num_bytes; | |
204 | else | |
205 | i = (int)(sizeof(data) - (dataptr - data)); | |
206 | ||
207 | memcpy(dataptr, packet.object_value.string.bytes, i); | |
208 | ||
209 | datalen += i; | |
210 | break; | |
211 | ||
212 | case CUPS_ASN1_OID : | |
213 | _cupsSNMPOIDToString(packet.object_value.oid, dataptr, | |
214 | sizeof(data) - (dataptr - data)); | |
215 | datalen += (int)strlen(dataptr); | |
216 | break; | |
217 | ||
218 | case CUPS_ASN1_HEX_STRING : | |
219 | for (i = 0; | |
220 | i < packet.object_value.string.num_bytes && | |
221 | dataptr < (data + sizeof(data) - 3); | |
222 | i ++, dataptr += 2) | |
223 | sprintf(dataptr, "%02X", | |
224 | packet.object_value.string.bytes[i]); | |
225 | datalen += (int)strlen(dataptr); | |
226 | break; | |
227 | ||
228 | case CUPS_ASN1_COUNTER : | |
229 | snprintf(dataptr, sizeof(data) - (dataptr - data), "%d", | |
230 | packet.object_value.counter); | |
231 | datalen += (int)strlen(dataptr); | |
232 | break; | |
233 | ||
234 | case CUPS_ASN1_GAUGE : | |
235 | snprintf(dataptr, sizeof(data) - (dataptr - data), "%u", | |
236 | packet.object_value.gauge); | |
237 | datalen += (int)strlen(dataptr); | |
238 | break; | |
239 | ||
240 | case CUPS_ASN1_TIMETICKS : | |
241 | snprintf(dataptr, sizeof(data) - (dataptr - data), "%u", | |
242 | packet.object_value.timeticks); | |
243 | datalen += (int)strlen(dataptr); | |
244 | break; | |
245 | ||
246 | default : | |
247 | fprintf(stderr, "DEBUG: Unknown OID value type %02X!\n", | |
248 | packet.object_type); | |
249 | ||
250 | case CUPS_ASN1_NULL_VALUE : | |
251 | dataptr[0] = '\0'; | |
252 | break; | |
253 | } | |
254 | ||
255 | fprintf(stderr, "DEBUG: Returning %s %s\n", data, data + datalen); | |
256 | ||
257 | status = CUPS_SC_STATUS_OK; | |
258 | } | |
259 | else | |
260 | fputs("DEBUG: SNMP read error...\n", stderr); | |
261 | } | |
262 | else | |
263 | fputs("DEBUG: SNMP write error...\n", stderr); | |
264 | break; | |
265 | } | |
266 | ||
267 | status = CUPS_SC_STATUS_NOT_IMPLEMENTED; | |
268 | datalen = 0; | |
269 | break; | |
270 | ||
271 | case CUPS_SC_CMD_GET_CONNECTED : | |
272 | status = CUPS_SC_STATUS_OK; | |
273 | data[0] = device_fd != -1; | |
274 | datalen = 1; | |
275 | break; | |
276 | ||
277 | case CUPS_SC_CMD_GET_DEVICE_ID : | |
278 | if (snmp_fd >= 0) | |
279 | { | |
280 | cups_snmp_t packet; /* Packet from printer */ | |
281 | static const int ppmPrinterIEEE1284DeviceId[] = | |
282 | { CUPS_OID_ppmPrinterIEEE1284DeviceId,1,-1 }; | |
283 | ||
284 | ||
285 | status = CUPS_SC_STATUS_IO_ERROR; | |
286 | datalen = 0; | |
287 | ||
288 | if (_cupsSNMPWrite(snmp_fd, addr, CUPS_SNMP_VERSION_1, | |
289 | _cupsSNMPDefaultCommunity(), | |
290 | CUPS_ASN1_GET_REQUEST, 1, | |
291 | ppmPrinterIEEE1284DeviceId)) | |
292 | { | |
293 | if (_cupsSNMPRead(snmp_fd, &packet, 1.0) && | |
294 | packet.object_type == CUPS_ASN1_OCTET_STRING) | |
295 | { | |
296 | strlcpy(data, (char *)packet.object_value.string.bytes, | |
297 | sizeof(data)); | |
298 | datalen = (int)strlen(data); | |
299 | status = CUPS_SC_STATUS_OK; | |
300 | } | |
301 | } | |
302 | ||
303 | break; | |
304 | } | |
305 | ||
306 | if ((device_id = getenv("1284DEVICEID")) != NULL) | |
307 | { | |
308 | strlcpy(data, device_id, sizeof(data)); | |
309 | datalen = (int)strlen(data); | |
310 | status = CUPS_SC_STATUS_OK; | |
311 | break; | |
312 | } | |
313 | ||
314 | default : | |
315 | status = CUPS_SC_STATUS_NOT_IMPLEMENTED; | |
316 | datalen = 0; | |
317 | break; | |
318 | } | |
319 | ||
320 | return (cupsSideChannelWrite(command, status, data, datalen, 1.0)); | |
321 | } | |
322 | ||
323 | ||
324 | /* | |
325 | * End of "$Id: network.c 11971 2014-07-01 14:38:29Z msweet $". | |
326 | */ |