1: /* errwarn.c
2:
3: Errors and warnings... */
4:
5: /*
6: * Copyright (c) 1995 RadioMail Corporation.
7: * Copyright (c) 2004,2007,2009 by Internet Systems Consortium, Inc. ("ISC")
8: * Copyright (c) 1996-2003 by Internet Software Consortium
9: *
10: * Permission to use, copy, modify, and distribute this software for any
11: * purpose with or without fee is hereby granted, provided that the above
12: * copyright notice and this permission notice appear in all copies.
13: *
14: * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
15: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
16: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
17: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
18: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
19: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
20: * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
21: *
22: * Internet Systems Consortium, Inc.
23: * 950 Charter Street
24: * Redwood City, CA 94063
25: * <info@isc.org>
26: * https://www.isc.org/
27: *
28: * This software was written for RadioMail Corporation by Ted Lemon
29: * under a contract with Vixie Enterprises. Further modifications have
30: * been made for Internet Systems Consortium under a contract
31: * with Vixie Laboratories.
32: */
33:
34: #include "dhcpd.h"
35:
36: #include <omapip/omapip_p.h>
37: #include <errno.h>
38: #include <syslog.h>
39:
40: #ifdef DEBUG
41: int log_perror = -1;
42: #else
43: int log_perror = 1;
44: #endif
45: int log_priority;
46: void (*log_cleanup) (void);
47:
48: #define CVT_BUF_MAX 1023
49: static char mbuf [CVT_BUF_MAX + 1];
50: static char fbuf [CVT_BUF_MAX + 1];
51:
52: /* Log an error message, then exit... */
53:
54: void log_fatal (const char * fmt, ... )
55: {
56: va_list list;
57:
58: do_percentm (fbuf, fmt);
59:
60: /* %Audit% This is log output. %2004.06.17,Safe%
61: * If we truncate we hope the user can get a hint from the log.
62: */
63: va_start (list, fmt);
64: vsnprintf (mbuf, sizeof mbuf, fbuf, list);
65: va_end (list);
66:
67: #ifndef DEBUG
68: syslog (log_priority | LOG_ERR, "%s", mbuf);
69: #endif
70:
71: /* Also log it to stderr? */
72: if (log_perror) {
73: IGNORE_RET (write (STDERR_FILENO, mbuf, strlen (mbuf)));
74: IGNORE_RET (write (STDERR_FILENO, "\n", 1));
75: }
76:
77: #if !defined (NOMINUM)
78: log_error ("%s", "");
79: log_error ("If you did not get this software from ftp.isc.org, please");
80: log_error ("get the latest from ftp.isc.org and install that before");
81: log_error ("requesting help.");
82: log_error ("%s", "");
83: log_error ("If you did get this software from ftp.isc.org and have not");
84: log_error ("yet read the README, please read it before requesting help.");
85: log_error ("If you intend to request help from the dhcp-server@isc.org");
86: log_error ("mailing list, please read the section on the README about");
87: log_error ("submitting bug reports and requests for help.");
88: log_error ("%s", "");
89: log_error ("Please do not under any circumstances send requests for");
90: log_error ("help directly to the authors of this software - please");
91: log_error ("send them to the appropriate mailing list as described in");
92: log_error ("the README file.");
93: log_error ("%s", "");
94: log_error ("exiting.");
95: #endif
96: if (log_cleanup)
97: (*log_cleanup) ();
98: exit (1);
99: }
100:
101: /* Log an error message... */
102:
103: int log_error (const char * fmt, ...)
104: {
105: va_list list;
106:
107: do_percentm (fbuf, fmt);
108:
109: /* %Audit% This is log output. %2004.06.17,Safe%
110: * If we truncate we hope the user can get a hint from the log.
111: */
112: va_start (list, fmt);
113: vsnprintf (mbuf, sizeof mbuf, fbuf, list);
114: va_end (list);
115:
116: #ifndef DEBUG
117: syslog (log_priority | LOG_ERR, "%s", mbuf);
118: #endif
119:
120: if (log_perror) {
121: IGNORE_RET (write (STDERR_FILENO, mbuf, strlen (mbuf)));
122: IGNORE_RET (write (STDERR_FILENO, "\n", 1));
123: }
124:
125: return 0;
126: }
127:
128: /* Log a note... */
129:
130: int log_info (const char *fmt, ...)
131: {
132: va_list list;
133:
134: do_percentm (fbuf, fmt);
135:
136: /* %Audit% This is log output. %2004.06.17,Safe%
137: * If we truncate we hope the user can get a hint from the log.
138: */
139: va_start (list, fmt);
140: vsnprintf (mbuf, sizeof mbuf, fbuf, list);
141: va_end (list);
142:
143: #ifndef DEBUG
144: syslog (log_priority | LOG_INFO, "%s", mbuf);
145: #endif
146:
147: if (log_perror) {
148: IGNORE_RET (write (STDERR_FILENO, mbuf, strlen (mbuf)));
149: IGNORE_RET (write (STDERR_FILENO, "\n", 1));
150: }
151:
152: return 0;
153: }
154:
155: /* Log a debug message... */
156:
157: int log_debug (const char *fmt, ...)
158: {
159: va_list list;
160:
161: do_percentm (fbuf, fmt);
162:
163: /* %Audit% This is log output. %2004.06.17,Safe%
164: * If we truncate we hope the user can get a hint from the log.
165: */
166: va_start (list, fmt);
167: vsnprintf (mbuf, sizeof mbuf, fbuf, list);
168: va_end (list);
169:
170: #ifndef DEBUG
171: syslog (log_priority | LOG_DEBUG, "%s", mbuf);
172: #endif
173:
174: if (log_perror) {
175: IGNORE_RET (write (STDERR_FILENO, mbuf, strlen (mbuf)));
176: IGNORE_RET (write (STDERR_FILENO, "\n", 1));
177: }
178:
179: return 0;
180: }
181:
182: /* Find %m in the input string and substitute an error message string. */
183:
184: void do_percentm (obuf, ibuf)
185: char *obuf;
186: const char *ibuf;
187: {
188: const char *s = ibuf;
189: char *p = obuf;
190: int infmt = 0;
191: const char *m;
192: int len = 0;
193:
194: while (*s) {
195: if (infmt) {
196: if (*s == 'm') {
197: #ifndef __CYGWIN32__
198: m = strerror (errno);
199: #else
200: m = pWSAError ();
201: #endif
202: if (!m)
203: m = "<unknown error>";
204: len += strlen (m);
205: if (len > CVT_BUF_MAX)
206: goto out;
207: strcpy (p - 1, m);
208: p += strlen (p);
209: ++s;
210: } else {
211: if (++len > CVT_BUF_MAX)
212: goto out;
213: *p++ = *s++;
214: }
215: infmt = 0;
216: } else {
217: if (*s == '%')
218: infmt = 1;
219: if (++len > CVT_BUF_MAX)
220: goto out;
221: *p++ = *s++;
222: }
223: }
224: out:
225: *p = 0;
226: }
227:
228: #ifdef NO_STRERROR
229: char *strerror (err)
230: int err;
231: {
232: extern char *sys_errlist [];
233: extern int sys_nerr;
234: static char errbuf [128];
235:
236: if (err < 0 || err >= sys_nerr) {
237: sprintf (errbuf, "Error %d", err);
238: return errbuf;
239: }
240: return sys_errlist [err];
241: }
242: #endif /* NO_STRERROR */
243:
244: #ifdef _WIN32
245: char *pWSAError ()
246: {
247: int err = WSAGetLastError ();
248:
249: switch (err)
250: {
251: case WSAEACCES:
252: return "Permission denied";
253: case WSAEADDRINUSE:
254: return "Address already in use";
255: case WSAEADDRNOTAVAIL:
256: return "Cannot assign requested address";
257: case WSAEAFNOSUPPORT:
258: return "Address family not supported by protocol family";
259: case WSAEALREADY:
260: return "Operation already in progress";
261: case WSAECONNABORTED:
262: return "Software caused connection abort";
263: case WSAECONNREFUSED:
264: return "Connection refused";
265: case WSAECONNRESET:
266: return "Connection reset by peer";
267: case WSAEDESTADDRREQ:
268: return "Destination address required";
269: case WSAEFAULT:
270: return "Bad address";
271: case WSAEHOSTDOWN:
272: return "Host is down";
273: case WSAEHOSTUNREACH:
274: return "No route to host";
275: case WSAEINPROGRESS:
276: return "Operation now in progress";
277: case WSAEINTR:
278: return "Interrupted function call";
279: case WSAEINVAL:
280: return "Invalid argument";
281: case WSAEISCONN:
282: return "Socket is already connected";
283: case WSAEMFILE:
284: return "Too many open files";
285: case WSAEMSGSIZE:
286: return "Message too long";
287: case WSAENETDOWN:
288: return "Network is down";
289: case WSAENETRESET:
290: return "Network dropped connection on reset";
291: case WSAENETUNREACH:
292: return "Network is unreachable";
293: case WSAENOBUFS:
294: return "No buffer space available";
295: case WSAENOPROTOOPT:
296: return "Bad protocol option";
297: case WSAENOTCONN:
298: return "Socket is not connected";
299: case WSAENOTSOCK:
300: return "Socket operation on non-socket";
301: case WSAEOPNOTSUPP:
302: return "Operation not supported";
303: case WSAEPFNOSUPPORT:
304: return "Protocol family not supported";
305: case WSAEPROCLIM:
306: return "Too many processes";
307: case WSAEPROTONOSUPPORT:
308: return "Protocol not supported";
309: case WSAEPROTOTYPE:
310: return "Protocol wrong type for socket";
311: case WSAESHUTDOWN:
312: return "Cannot send after socket shutdown";
313: case WSAESOCKTNOSUPPORT:
314: return "Socket type not supported";
315: case WSAETIMEDOUT:
316: return "Connection timed out";
317: case WSAEWOULDBLOCK:
318: return "Resource temporarily unavailable";
319: case WSAHOST_NOT_FOUND:
320: return "Host not found";
321: #if 0
322: case WSA_INVALID_HANDLE:
323: return "Specified event object handle is invalid";
324: case WSA_INVALID_PARAMETER:
325: return "One or more parameters are invalid";
326: case WSAINVALIDPROCTABLE:
327: return "Invalid procedure table from service provider";
328: case WSAINVALIDPROVIDER:
329: return "Invalid service provider version number";
330: case WSA_IO_PENDING:
331: return "Overlapped operations will complete later";
332: case WSA_IO_INCOMPLETE:
333: return "Overlapped I/O event object not in signaled state";
334: case WSA_NOT_ENOUGH_MEMORY:
335: return "Insufficient memory available";
336: #endif
337: case WSANOTINITIALISED:
338: return "Successful WSAStartup not yet performer";
339: case WSANO_DATA:
340: return "Valid name, no data record of requested type";
341: case WSANO_RECOVERY:
342: return "This is a non-recoverable error";
343: #if 0
344: case WSAPROVIDERFAILEDINIT:
345: return "Unable to initialize a service provider";
346: case WSASYSCALLFAILURE:
347: return "System call failure";
348: #endif
349: case WSASYSNOTREADY:
350: return "Network subsystem is unavailable";
351: case WSATRY_AGAIN:
352: return "Non-authoritative host not found";
353: case WSAVERNOTSUPPORTED:
354: return "WINSOCK.DLL version out of range";
355: case WSAEDISCON:
356: return "Graceful shutdown in progress";
357: #if 0
358: case WSA_OPERATION_ABORTED:
359: return "Overlapped operation aborted";
360: #endif
361: }
362: return "Unknown WinSock error";
363: }
364: #endif /* _WIN32 */
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