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7a14d768 MS |
1 | /* |
2 | * "$Id$" | |
3 | * | |
5a1d7a17 | 4 | * Common backend network APIs for CUPS. |
7a14d768 | 5 | * |
5a1d7a17 MS |
6 | * Copyright 2007-2011 by Apple Inc. |
7 | * Copyright 2006-2007 by Easy Software Products, all rights reserved. | |
7a14d768 | 8 | * |
5a1d7a17 MS |
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/". | |
7a14d768 | 14 | * |
5a1d7a17 | 15 | * This file is subject to the Apple OS-Developed Software exception. |
7a14d768 MS |
16 | */ |
17 | ||
18 | /* | |
19 | * Include necessary headers. | |
20 | */ | |
21 | ||
22 | #include "backend-private.h" | |
23 | #include <limits.h> | |
5a1d7a17 | 24 | #include <sys/select.h> |
7a14d768 MS |
25 | |
26 | ||
7a14d768 MS |
27 | /* |
28 | * 'backendCheckSideChannel()' - Check the side-channel for pending requests. | |
29 | */ | |
30 | ||
31 | ||
32 | void | |
33 | backendCheckSideChannel( | |
34 | int snmp_fd, /* I - SNMP socket */ | |
35 | http_addr_t *addr) /* I - Address of device */ | |
36 | { | |
37 | fd_set input; /* Select input set */ | |
38 | struct timeval timeout; /* Select timeout */ | |
39 | ||
40 | ||
41 | FD_ZERO(&input); | |
42 | FD_SET(CUPS_SC_FD, &input); | |
43 | ||
44 | timeout.tv_sec = timeout.tv_usec = 0; | |
45 | ||
46 | if (select(CUPS_SC_FD + 1, &input, NULL, NULL, &timeout) > 0) | |
47 | backendNetworkSideCB(-1, -1, snmp_fd, addr, 0); | |
48 | } | |
49 | ||
50 | ||
51 | /* | |
52 | * 'backendNetworkSideCB()' - Handle common network side-channel commands. | |
53 | */ | |
54 | ||
18ecb428 | 55 | int /* O - -1 on error, 0 on success */ |
7a14d768 MS |
56 | backendNetworkSideCB( |
57 | int print_fd, /* I - Print file or -1 */ | |
58 | int device_fd, /* I - Device file or -1 */ | |
59 | int snmp_fd, /* I - SNMP socket */ | |
60 | http_addr_t *addr, /* I - Address of device */ | |
61 | int use_bc) /* I - Use back-channel data? */ | |
62 | { | |
63 | cups_sc_command_t command; /* Request command */ | |
64 | cups_sc_status_t status; /* Request/response status */ | |
dcb445bc | 65 | char data[65536]; /* Request/response data */ |
7a14d768 MS |
66 | int datalen; /* Request/response data size */ |
67 | const char *device_id; /* 1284DEVICEID env var */ | |
68 | ||
69 | ||
70 | datalen = sizeof(data); | |
71 | ||
72 | if (cupsSideChannelRead(&command, &status, data, &datalen, 1.0)) | |
18ecb428 | 73 | return (-1); |
7a14d768 MS |
74 | |
75 | switch (command) | |
76 | { | |
77 | case CUPS_SC_CMD_DRAIN_OUTPUT : | |
78 | /* | |
79 | * Our sockets disable the Nagle algorithm and data is sent immediately. | |
80 | */ | |
81 | ||
82 | if (device_fd < 0) | |
83 | status = CUPS_SC_STATUS_NOT_IMPLEMENTED; | |
84 | else if (backendDrainOutput(print_fd, device_fd)) | |
85 | status = CUPS_SC_STATUS_IO_ERROR; | |
82cc1f9a | 86 | else |
7a14d768 MS |
87 | status = CUPS_SC_STATUS_OK; |
88 | ||
89 | datalen = 0; | |
90 | break; | |
91 | ||
92 | case CUPS_SC_CMD_GET_BIDI : | |
8b450588 | 93 | status = CUPS_SC_STATUS_OK; |
7a14d768 MS |
94 | data[0] = use_bc; |
95 | datalen = 1; | |
96 | break; | |
97 | ||
20fbc903 MS |
98 | case CUPS_SC_CMD_SNMP_GET : |
99 | case CUPS_SC_CMD_SNMP_GET_NEXT : | |
100 | fprintf(stderr, "DEBUG: CUPS_SC_CMD_SNMP_%s: %d (%s)\n", | |
101 | command == CUPS_SC_CMD_SNMP_GET ? "GET" : "GET_NEXT", datalen, | |
102 | data); | |
103 | ||
104 | if (datalen < 2) | |
105 | { | |
106 | status = CUPS_SC_STATUS_BAD_MESSAGE; | |
107 | datalen = 0; | |
108 | break; | |
109 | } | |
110 | ||
111 | if (snmp_fd >= 0) | |
112 | { | |
82cc1f9a | 113 | char *dataptr; /* Pointer into data */ |
20fbc903 | 114 | cups_snmp_t packet; /* Packet from printer */ |
82cc1f9a | 115 | const char *snmp_value; /* CUPS_SNMP_VALUE env var */ |
20fbc903 | 116 | |
82cc1f9a MS |
117 | if ((snmp_value = getenv("CUPS_SNMP_VALUE")) != NULL) |
118 | { | |
119 | const char *snmp_count; /* CUPS_SNMP_COUNT env var */ | |
120 | int count; /* Repetition count */ | |
121 | ||
122 | if ((snmp_count = getenv("CUPS_SNMP_COUNT")) != NULL) | |
123 | { | |
124 | if ((count = atoi(snmp_count)) <= 0) | |
125 | count = 1; | |
126 | } | |
127 | else | |
128 | count = 1; | |
129 | ||
130 | for (dataptr = data + strlen(data) + 1; | |
131 | count > 0 && dataptr < (data + sizeof(data) - 1); | |
132 | count --, dataptr += strlen(dataptr)) | |
133 | strlcpy(dataptr, snmp_value, sizeof(data) - (dataptr - data)); | |
134 | ||
135 | fprintf(stderr, "DEBUG: Returning %s %s\n", data, | |
136 | data + strlen(data) + 1); | |
137 | ||
138 | status = CUPS_SC_STATUS_OK; | |
139 | datalen = dataptr - data; | |
140 | break; | |
141 | } | |
20fbc903 MS |
142 | |
143 | if (!_cupsSNMPStringToOID(data, packet.object_name, CUPS_SNMP_MAX_OID)) | |
144 | { | |
145 | status = CUPS_SC_STATUS_BAD_MESSAGE; | |
146 | datalen = 0; | |
147 | break; | |
148 | } | |
149 | ||
150 | status = CUPS_SC_STATUS_IO_ERROR; | |
151 | datalen = 0; | |
152 | ||
153 | if (_cupsSNMPWrite(snmp_fd, addr, CUPS_SNMP_VERSION_1, | |
154 | _cupsSNMPDefaultCommunity(), | |
155 | command == CUPS_SC_CMD_SNMP_GET ? | |
156 | CUPS_ASN1_GET_REQUEST : | |
157 | CUPS_ASN1_GET_NEXT_REQUEST, 1, | |
158 | packet.object_name)) | |
159 | { | |
160 | if (_cupsSNMPRead(snmp_fd, &packet, 1.0)) | |
161 | { | |
20fbc903 MS |
162 | int i; /* Looping var */ |
163 | ||
164 | ||
165 | if (!_cupsSNMPOIDToString(packet.object_name, data, sizeof(data))) | |
166 | { | |
167 | fputs("DEBUG: Bad OID returned!\n", stderr); | |
168 | break; | |
169 | } | |
170 | ||
171 | datalen = (int)strlen(data) + 1; | |
172 | dataptr = data + datalen; | |
173 | ||
174 | switch (packet.object_type) | |
175 | { | |
176 | case CUPS_ASN1_BOOLEAN : | |
177 | snprintf(dataptr, sizeof(data) - (dataptr - data), "%d", | |
178 | packet.object_value.boolean); | |
d1c13e16 | 179 | datalen += (int)strlen(dataptr); |
20fbc903 MS |
180 | break; |
181 | ||
182 | case CUPS_ASN1_INTEGER : | |
183 | snprintf(dataptr, sizeof(data) - (dataptr - data), "%d", | |
184 | packet.object_value.integer); | |
d1c13e16 | 185 | datalen += (int)strlen(dataptr); |
20fbc903 MS |
186 | break; |
187 | ||
188 | case CUPS_ASN1_BIT_STRING : | |
189 | case CUPS_ASN1_OCTET_STRING : | |
ef55b745 MS |
190 | if (packet.object_value.string.num_bytes < 0) |
191 | i = 0; | |
82cc1f9a | 192 | else if (packet.object_value.string.num_bytes < |
ef55b745 | 193 | (sizeof(data) - (dataptr - data))) |
d1c13e16 | 194 | i = packet.object_value.string.num_bytes; |
ef55b745 MS |
195 | else |
196 | i = (int)(sizeof(data) - (dataptr - data)); | |
d1c13e16 MS |
197 | |
198 | memcpy(dataptr, packet.object_value.string.bytes, i); | |
199 | ||
200 | datalen += i; | |
20fbc903 MS |
201 | break; |
202 | ||
203 | case CUPS_ASN1_OID : | |
204 | _cupsSNMPOIDToString(packet.object_value.oid, dataptr, | |
205 | sizeof(data) - (dataptr - data)); | |
d1c13e16 | 206 | datalen += (int)strlen(dataptr); |
20fbc903 MS |
207 | break; |
208 | ||
209 | case CUPS_ASN1_HEX_STRING : | |
210 | for (i = 0; | |
d1c13e16 | 211 | i < packet.object_value.string.num_bytes && |
20fbc903 MS |
212 | dataptr < (data + sizeof(data) - 3); |
213 | i ++, dataptr += 2) | |
214 | sprintf(dataptr, "%02X", | |
d1c13e16 MS |
215 | packet.object_value.string.bytes[i]); |
216 | datalen += (int)strlen(dataptr); | |
20fbc903 MS |
217 | break; |
218 | ||
219 | case CUPS_ASN1_COUNTER : | |
220 | snprintf(dataptr, sizeof(data) - (dataptr - data), "%d", | |
221 | packet.object_value.counter); | |
d1c13e16 | 222 | datalen += (int)strlen(dataptr); |
20fbc903 MS |
223 | break; |
224 | ||
225 | case CUPS_ASN1_GAUGE : | |
226 | snprintf(dataptr, sizeof(data) - (dataptr - data), "%u", | |
227 | packet.object_value.gauge); | |
d1c13e16 | 228 | datalen += (int)strlen(dataptr); |
20fbc903 MS |
229 | break; |
230 | ||
231 | case CUPS_ASN1_TIMETICKS : | |
232 | snprintf(dataptr, sizeof(data) - (dataptr - data), "%u", | |
233 | packet.object_value.timeticks); | |
d1c13e16 | 234 | datalen += (int)strlen(dataptr); |
20fbc903 MS |
235 | break; |
236 | ||
237 | default : | |
238 | fprintf(stderr, "DEBUG: Unknown OID value type %02X!\n", | |
239 | packet.object_type); | |
d1c13e16 MS |
240 | |
241 | case CUPS_ASN1_NULL_VALUE : | |
242 | dataptr[0] = '\0'; | |
20fbc903 MS |
243 | break; |
244 | } | |
245 | ||
246 | fprintf(stderr, "DEBUG: Returning %s %s\n", data, data + datalen); | |
247 | ||
d1c13e16 | 248 | status = CUPS_SC_STATUS_OK; |
20fbc903 MS |
249 | } |
250 | else | |
251 | fputs("DEBUG: SNMP read error...\n", stderr); | |
252 | } | |
253 | else | |
254 | fputs("DEBUG: SNMP write error...\n", stderr); | |
255 | break; | |
256 | } | |
257 | ||
258 | status = CUPS_SC_STATUS_NOT_IMPLEMENTED; | |
259 | datalen = 0; | |
260 | break; | |
261 | ||
7a14d768 MS |
262 | case CUPS_SC_CMD_GET_DEVICE_ID : |
263 | if (snmp_fd >= 0) | |
264 | { | |
265 | cups_snmp_t packet; /* Packet from printer */ | |
266 | static const int ppmPrinterIEEE1284DeviceId[] = | |
267 | { CUPS_OID_ppmPrinterIEEE1284DeviceId,1,-1 }; | |
268 | ||
20fbc903 MS |
269 | |
270 | status = CUPS_SC_STATUS_IO_ERROR; | |
271 | datalen = 0; | |
272 | ||
273 | if (_cupsSNMPWrite(snmp_fd, addr, CUPS_SNMP_VERSION_1, | |
274 | _cupsSNMPDefaultCommunity(), | |
7a14d768 MS |
275 | CUPS_ASN1_GET_REQUEST, 1, |
276 | ppmPrinterIEEE1284DeviceId)) | |
277 | { | |
278 | if (_cupsSNMPRead(snmp_fd, &packet, 1.0) && | |
279 | packet.object_type == CUPS_ASN1_OCTET_STRING) | |
280 | { | |
d1c13e16 MS |
281 | strlcpy(data, (char *)packet.object_value.string.bytes, |
282 | sizeof(data)); | |
7a14d768 | 283 | datalen = (int)strlen(data); |
20fbc903 | 284 | status = CUPS_SC_STATUS_OK; |
7a14d768 MS |
285 | } |
286 | } | |
20fbc903 MS |
287 | |
288 | break; | |
7a14d768 MS |
289 | } |
290 | ||
291 | if ((device_id = getenv("1284DEVICEID")) != NULL) | |
292 | { | |
293 | strlcpy(data, device_id, sizeof(data)); | |
294 | datalen = (int)strlen(data); | |
d1c13e16 | 295 | status = CUPS_SC_STATUS_OK; |
7a14d768 MS |
296 | break; |
297 | } | |
298 | ||
f14324a7 MS |
299 | case CUPS_SC_CMD_GET_CONNECTED : |
300 | status = CUPS_SC_STATUS_OK; | |
301 | data[0] = device_fd != -1; | |
302 | datalen = 1; | |
303 | break; | |
304 | ||
7a14d768 MS |
305 | default : |
306 | status = CUPS_SC_STATUS_NOT_IMPLEMENTED; | |
307 | datalen = 0; | |
308 | break; | |
309 | } | |
310 | ||
18ecb428 | 311 | return (cupsSideChannelWrite(command, status, data, datalen, 1.0)); |
7a14d768 MS |
312 | } |
313 | ||
314 | ||
7a14d768 MS |
315 | /* |
316 | * End of "$Id$". | |
317 | */ |