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1.4 ! reyk 1: /* $OpenBSD: bgplg.c,v 1.3 2006/12/12 11:43:50 reyk Exp $ */
1.1 reyk 2:
3: /*
4: * Copyright (c) 2005, 2006 Reyk Floeter <reyk@vantronix.net>
5: *
6: * Permission to use, copy, modify, and distribute this software for any
7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
9: *
10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17: */
18:
19: #include <sys/stat.h>
20: #include <sys/types.h>
21: #include <sys/param.h>
22:
23: #include <stdio.h>
24: #include <stdlib.h>
25: #include <signal.h>
26: #include <string.h>
27: #include <unistd.h>
28: #include <ctype.h>
29: #include <errno.h>
30: #include <fcntl.h>
31:
32: #include "bgplg.h"
33:
34: #define INC_STYLE "/conf/bgplg.css"
35: #define INC_HEAD "/conf/bgplg.head"
36: #define INC_FOOT "/conf/bgplg.foot"
37:
38: #define BGPDSOCK "/logs/bgpd.rsock"
39: #define BGPCTL "/bin/bgpctl", "-s", BGPDSOCK
40: #define PING "/bin/ping"
41: #define TRACEROUTE "/bin/traceroute"
1.4 ! reyk 42: #define CONTENT_TYPE "text/html"
1.1 reyk 43:
44: static struct cmd cmds[] = CMDS;
45:
46: char *lg_getenv(const char *, int *);
47: void lg_urldecode(char *);
48: char **lg_arg2argv(char *, int *);
49: char **lg_argextra(char **, int, struct cmd *);
50: char *lg_getarg(const char *, char *, int);
51: int lg_incl(const char *);
52:
53: void
54: lg_urldecode(char *str)
55: {
56: size_t i, c, len;
57: char code[3];
58: long result;
59:
60: if (str && *str) {
61: len = strlen(str);
62: i = c = 0;
63: while (i < len) {
64: if (str[i] == '%' && i <= (len - 2)) {
1.3 reyk 65: if (isxdigit(str[i + 1]) &&
1.1 reyk 66: isxdigit(str[i + 2])) {
67: code[0] = str[i + 1];
68: code[1] = str[i + 2];
69: code[2] = 0;
70: result = strtol(code, NULL, 16);
71: /* Replace NUL chars with a space */
72: if (result == 0)
73: result = ' ';
74: str[c++] = result;
75: i += 3;
76: } else {
77: str[c++] = '%';
78: i++;
79: }
80: } else if (str[i] == '+') {
81: str[i] = ' ';
82: } else {
83: if (c != i)
84: str[c] = str[i];
85: c++;
86: i++;
87: }
88: }
89: str[c] = 0x0;
90: }
91: }
92:
93: char *
94: lg_getenv(const char *name, int *lenp)
95: {
96: size_t len;
97: u_int i;
98: char *ptr;
99:
100: if ((ptr = getenv(name)) == NULL)
101: return (NULL);
102:
103: lg_urldecode(ptr);
104:
105: if (!(len = strlen(ptr)))
106: return (NULL);
107:
108: if (lenp != NULL)
109: *lenp = len;
110:
111: #define allowed_in_string(_x) \
1.3 reyk 112: ((isalnum(_x) || isprint(_x)) && \
113: (_x != '%' && _x != '\\' && _x != ';' && _x != '|'))
1.1 reyk 114:
115: for (i = 0; i < len; i++) {
116: if (!allowed_in_string(ptr[i])) {
117: printf("invalid character in input\n");
118: return (NULL);
119: }
120: if (ptr[i] == '&')
121: ptr[i] = '\0';
122: }
123:
124: return (ptr);
125: }
126:
127: char *
128: lg_getarg(const char *name, char *arg, int len)
129: {
130: char *ptr = arg;
131: size_t namelen, ptrlen;
132: int i;
133:
134: namelen = strlen(name);
135:
136: for (i = 0; i < len; i++) {
137: if (arg[i] == '\0')
138: continue;
139: ptr = arg + i;
140: ptrlen = strlen(ptr);
141: if (namelen >= ptrlen)
142: continue;
143: if (strncmp(name, ptr, namelen) == 0)
144: return (ptr + namelen);
145: }
146:
147: return (NULL);
148: }
149:
150: char **
151: lg_arg2argv(char *arg, int *argc)
152: {
153: char **argv, *ptr = arg;
154: size_t len;
155: u_int i, c = 1;
156:
157: len = strlen(arg);
158:
159: /* Count elements */
160: for (i = 0; i < (len - 1); i++) {
161: if (isspace(arg[i])) {
162: /* filter out additional options */
163: if (arg[i + 1] == '-') {
164: printf("invalid input\n");
165: return (NULL);
166: }
167: arg[i] = '\0';
168: c++;
169: }
170: }
171:
172: /* Generate array */
173: if ((argv = calloc(c + 1, sizeof(char *))) == NULL) {
174: printf("fatal error: %s\n", strerror(errno));
175: return (NULL);
176: }
177:
178: argv[c] = NULL;
179: *argc = c;
180:
181: /* Fill array */
182: for (i = c = 0; i < (len - 1); i++) {
183: if (arg[i] == '\0' || i == 0) {
184: if (i != 0)
185: ptr = &arg[i + 1];
186: argv[c++] = ptr;
187: }
188: }
189:
190: return (argv);
191: }
192:
193: char **
194: lg_argextra(char **argv, int argc, struct cmd *cmdp)
195: {
196: char **new_argv;
197: int i, c = 0;
198:
199: /* Count elements */
200: for (i = 0; cmdp->earg[i] != NULL; i++)
201: c++;
202:
203: /* Generate array */
204: if ((new_argv = calloc(c + argc + 1, sizeof(char *))) == NULL) {
205: printf("fatal error: %s\n", strerror(errno));
206: return (NULL);
207: }
208:
209: /* Fill array */
210: for (i = c = 0; cmdp->earg[i] != NULL; i++)
211: new_argv[c++] = cmdp->earg[i];
212:
213: /* Append old array */
214: for (i = 0; i < argc; i++)
215: new_argv[c++] = argv[i];
216:
217: new_argv[c] = NULL;
218:
219: if (argv != NULL)
220: free(argv);
221:
222: return (new_argv);
223: }
224:
225: int
226: lg_incl(const char *file)
227: {
228: char buf[BUFSIZ];
229: int fd, len;
230:
231: if ((fd = open(file, O_RDONLY)) == -1)
232: return (errno);
233:
234: do {
235: len = read(fd, buf, sizeof(buf));
236: fwrite(buf, len, 1, stdout);
237: } while(len == BUFSIZ);
238:
239: return (0);
240: }
241:
242: int
243: main(void)
244: {
245: char *query, *self, *cmd = NULL, *req;
246: char **argv = NULL;
247: char myname[MAXHOSTNAMELEN];
248: int ret = 1, argc = 0, query_length = 0;
249: struct stat st;
250: u_int i;
251: struct cmd *cmdp = NULL;
252:
1.4 ! reyk 253: if (gethostname(myname, sizeof(myname)) != 0)
! 254: return (1);
! 255:
! 256: printf("Content-Type: %s\n"
1.1 reyk 257: "Cache-Control: no-cache\n\n"
1.2 reyk 258: "<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?>\n"
259: "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.1//EN\" "
260: "\"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd\">\n"
261: "<html xmlns=\"http://www.w3.org/1999/xhtml\">\n"
1.1 reyk 262: "<head>\n"
1.4 ! reyk 263: "<title>%s: %s</title>\n",
! 264: CONTENT_TYPE, NAME, myname);
1.1 reyk 265: if (stat(INC_STYLE, &st) == 0) {
266: printf("<style type='text/css'><!--\n");
267: lg_incl(INC_STYLE);
268: printf("--></style>\n");
269: }
270: if (stat(INC_HEAD, &st) != 0 || lg_incl(INC_HEAD) != 0) {
271: printf("</head>\n"
272: "<body>\n");
273: }
274:
275: printf("<h1>%s: %s</h1>\n", NAME, myname);
276: printf("<h2>%s</h2>\n", BRIEF);
277:
278: /* print a form with possible options */
279: if ((self = lg_getenv("SCRIPT_NAME", NULL)) == NULL) {
280: printf("fatal error: invalid request\n");
281: goto err;
282: }
283: if ((query = lg_getenv("QUERY_STRING", &query_length)) != NULL)
284: cmd = lg_getarg("cmd=", query, query_length);
1.2 reyk 285: printf(
286: "<form action='%s'>\n"
287: "<div class=\"command\">\n"
1.1 reyk 288: "<select name='cmd'>\n",
289: self);
290: for (i = 0; cmds[i].name != NULL; i++) {
291: if (!lg_checkperm(&cmds[i]))
292: continue;
293:
294: if (cmd != NULL && strcmp(cmd, cmds[i].name) == 0)
295: printf("<option value='%s' selected='selected'>%s"
296: "</option>\n",
297: cmds[i].name, cmds[i].name);
298: else
299: printf("<option value='%s'>%s</option>\n",
300: cmds[i].name, cmds[i].name);
301: }
302: printf("</select>\n"
303: "<input type='text' name='req'/>\n"
304: "<input type='submit' value='submit'/>\n"
1.2 reyk 305: "</div>\n"
1.1 reyk 306: "</form>\n"
307: "<pre>\n");
308: fflush(stdout);
309:
310: #ifdef DEBUG
311: if (close(2) == -1 || dup2(1, 2) == -1)
312: #else
313: if (close(2) == -1)
314: #endif
315: {
316: printf("fatal error: %s\n", strerror(errno));
317: goto err;
318: }
319:
320: if (query == NULL)
321: goto err;
322: if (cmd == NULL) {
323: printf("unspecified command\n");
324: goto err;
325: }
326: if ((req = lg_getarg("req=", query, query_length)) != NULL) {
327: /* Could be NULL */
328: argv = lg_arg2argv(req, &argc);
329: }
330:
331: for (i = 0; cmds[i].name != NULL; i++) {
332: if (strcmp(cmd, cmds[i].name) == 0) {
333: cmdp = &cmds[i];
334: break;
335: }
336: }
337:
338: if (cmdp == NULL) {
339: printf("invalid command: %s\n", cmd);
340: goto err;
341: }
342: if (argc > cmdp->maxargs) {
343: printf("superfluous argument(s): %s %s\n",
344: cmd, cmdp->args ? cmdp->args : "");
345: goto err;
346: }
347: if (argc < cmdp->minargs) {
348: printf("missing argument(s): %s %s\n", cmd, cmdp->args);
349: goto err;
350: }
351:
352: if (cmdp->func != NULL) {
353: ret = cmdp->func(cmds, argv);
354: } else {
355: if ((argv = lg_argextra(argv, argc, cmdp)) == NULL)
356: goto err;
357: ret = lg_exec(cmdp->earg[0], argv);
358: }
359: if (ret != 0)
360: printf("\nfailed%s\n", ret == 127 ? ": file not found" : ".");
361: else
362: printf("\nsuccess.\n");
363:
364: err:
365: fflush(stdout);
366:
367: if (argv != NULL);
368: free(argv);
369:
370: printf("</pre>\n");
371:
372: if (stat(INC_FOOT, &st) != 0 || lg_incl(INC_FOOT) != 0)
373: printf("<hr/>\n");
374:
375: printf("<div class='footer'>\n"
376: "<small>%s - %s<br/>Copyright (c) %s</small>\n"
377: "</div>\n"
378: "</body>\n"
379: "</html>\n", NAME, BRIEF, COPYRIGHT);
380:
381: return (ret);
382: }