Commit | Line | Data |
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ca51b51d MW |
1 | #include "cdb.h" |
2 | #include "stralloc.h" | |
3 | #include "byte.h" | |
4 | #include "str.h" | |
5 | #include "addrcheck.h" | |
6 | #include <errno.h> | |
0a045fc1 | 7 | #include <unistd.h> |
ca51b51d MW |
8 | |
9 | /* #define DEBUG */ | |
10 | #ifdef DEBUG | |
11 | # define D(x) x | |
12 | # include <stdio.h> | |
13 | # include <sys/types.h> | |
ca51b51d MW |
14 | #else |
15 | # define D(x) | |
16 | #endif | |
17 | ||
18 | #define STRALLOC_INIT { 0 } | |
19 | ||
20 | static int probe(int cdb, int prefix, const char *key, int len, | |
0a045fc1 | 21 | const char *suffix, const char **kp, uint32 *dlen) |
ca51b51d MW |
22 | { |
23 | static stralloc k = STRALLOC_INIT; | |
24 | char ch = prefix; | |
25 | int rc; | |
26 | ||
27 | k.len = 0; | |
28 | if (!stralloc_append(&k, &ch) || | |
29 | !stralloc_catb(&k, key, len) || | |
0a045fc1 MW |
30 | (suffix && !stralloc_cats(&k, suffix)) || |
31 | !stralloc_0(&k)) | |
ca51b51d | 32 | return (-1); |
0a045fc1 | 33 | if (kp) *kp = k.s; |
ca51b51d | 34 | D( fprintf(stderr, "*** `%.*s' -> ", k.len, k.s); ) |
0a045fc1 | 35 | rc = cdb_seek(cdb, k.s, k.len - 1, dlen); |
ca51b51d MW |
36 | D( if (rc == -1) |
37 | fprintf(stderr, "error: %s\n", strerror(errno)); | |
38 | else if (rc == 0) | |
39 | fprintf(stderr, "not found\n"); | |
40 | else if (!*dlen) | |
41 | fprintf(stderr, "empty\n"); | |
42 | else { | |
43 | int n = *dlen; | |
44 | int nn; | |
45 | char buf[256]; | |
46 | off_t pos = lseek(cdb, 0, SEEK_CUR); | |
47 | fprintf(stderr, "`"); | |
48 | while (n) { | |
49 | nn = sizeof(buf); if (nn > n) nn = n; | |
50 | read(cdb, buf, nn); | |
51 | fwrite(buf, 1, nn, stderr); | |
52 | n -= nn; | |
53 | } | |
54 | fprintf(stderr, "'\n"); | |
55 | lseek(cdb, pos, SEEK_SET); | |
56 | } ) | |
57 | return (rc); | |
58 | } | |
59 | ||
0a045fc1 MW |
60 | static int localprobe(int cdb, const char *sender, |
61 | const char *key, int len, | |
62 | const char *suffix, const char *tail, int *rc) | |
ca51b51d MW |
63 | { |
64 | int err; | |
65 | uint32 dlen; | |
66 | char ch; | |
0a045fc1 MW |
67 | const char *k; |
68 | static stralloc u = STRALLOC_INIT; | |
69 | static stralloc serv = STRALLOC_INIT; | |
70 | int kid; | |
71 | int n; | |
72 | int wstat; | |
73 | int p[2]; | |
74 | ||
75 | if ((err = probe(cdb, 'L', key, len, suffix, &k, &dlen)) < 0) | |
ca51b51d MW |
76 | return (-1); |
77 | if (!err) { *rc = 0; return (0); } | |
0a045fc1 | 78 | if (!dlen) { errno = EINVAL; return (-1); } |
ca51b51d | 79 | if (read(cdb, &ch, 1) != 1) { errno = EIO; return (-1); } |
0a045fc1 MW |
80 | if (ch == '?') { |
81 | u.len = 0; | |
82 | if (!stralloc_ready(&u, dlen - 1)) return (-1); | |
83 | if (read(cdb, u.s, dlen - 1) != dlen - 1) { errno = EIO; return (-1); } | |
84 | u.len = dlen - 1; | |
85 | serv.len = 0; | |
86 | if (!stralloc_cats(&serv, "addrcheck:") || | |
87 | !stralloc_cats(&serv, k + 1) || | |
88 | !stralloc_0(&serv) || | |
89 | !stralloc_0(&u)) | |
90 | return (-1); | |
91 | D( fprintf(stderr, "asking user:\n\ | |
92 | user = %s; service = %s\n tail = %s; sender = %s\n\ | |
93 | address = %s; key = %s\n", | |
94 | u.s, serv.s, tail, sender, key, k + 1); ) | |
95 | ||
96 | if (pipe(p) || (kid = fork()) == -1) | |
97 | return (-1); | |
98 | if (!kid) { | |
99 | dup2(p[1], 1); | |
100 | close(p[0]); | |
101 | close(p[1]); | |
102 | execl("/usr/bin/userv", "/usr/bin/userv", | |
103 | "-f", "stdin=/dev/null", | |
104 | u.s, serv.s, | |
105 | tail, sender, key, k + 1, | |
106 | (char *)0); | |
107 | _exit(127); | |
108 | } | |
109 | close(p[1]); | |
110 | n = read(p[0], &ch, 1); | |
111 | close(p[0]); | |
112 | if (wait_pid(&wstat, kid) < 0) { return (-1); } | |
113 | D( fprintf(stderr, "userv exited with status %d\n", wstat); ) | |
114 | if (n != 1 || wstat) { errno = EAGAIN; return (-1); } | |
115 | D( fprintf(stderr, "userv answer was `%c'\n", ch); ) | |
116 | } else if (dlen != 1) { | |
117 | errno = EIO; | |
118 | return (-1); | |
119 | } | |
ca51b51d MW |
120 | *rc = ch; |
121 | return (1); | |
122 | } | |
123 | ||
0a045fc1 MW |
124 | static int local(int cdb, const char *l, int len, |
125 | const char *sender, int *rc) | |
ca51b51d MW |
126 | { |
127 | int code; | |
128 | int err = 0; | |
129 | int dash; | |
130 | ||
0a045fc1 MW |
131 | if ((err = localprobe(cdb, sender, l, len, 0, l + len, &code)) != 0) |
132 | goto done; | |
ca51b51d MW |
133 | |
134 | for (;;) { | |
135 | dash = byte_rchr(l, len, '-'); | |
136 | if (dash == len) break; | |
0a045fc1 MW |
137 | if ((err = localprobe(cdb, sender, |
138 | l, dash, "-default", l + dash + 1, &code)) != 0) | |
139 | goto done; | |
ca51b51d MW |
140 | len = dash; |
141 | } | |
142 | *rc = 0; | |
143 | return (0); | |
144 | ||
145 | done: | |
146 | if (err >= 0) { | |
147 | switch (code) { | |
148 | case '+': *rc = 1; break; | |
149 | case '-': *rc = 0; break; | |
150 | default: errno = EINVAL; err = -1; break; | |
151 | } | |
152 | } | |
153 | return (err); | |
154 | } | |
155 | ||
156 | static int virt(int cdb, const char *u, int ulen, | |
0a045fc1 | 157 | const char *addr, int alen, const char *sender, int *rc) |
ca51b51d MW |
158 | { |
159 | static stralloc l = STRALLOC_INIT; | |
160 | uint32 dlen; | |
161 | int err; | |
162 | ||
0a045fc1 | 163 | if ((err = probe(cdb, 'V', addr, alen, 0, 0, &dlen)) <= 0) |
ca51b51d MW |
164 | return (err); |
165 | if (!stralloc_ready(&l, dlen + 1)) return (-1); | |
166 | if (read(cdb, l.s, dlen) != dlen) { errno = EIO; return (-1); } | |
167 | l.s[dlen] = '-'; | |
168 | l.len = dlen + 1; | |
0a045fc1 MW |
169 | if (!stralloc_catb(&l, u, ulen) || !stralloc_0(&l)) return (-1); |
170 | D( printf("*** virtual map -> `%s'\n", l.s); ) | |
171 | if (local(cdb, l.s, l.len - 1, sender, rc) < 0) return (-1); | |
ca51b51d MW |
172 | return (1); |
173 | } | |
174 | ||
0a045fc1 | 175 | int addrcheck(int cdb, const char *addr, const char *sender, int *rc) |
ca51b51d MW |
176 | { |
177 | int at, len, dot; | |
178 | int err = 0; | |
179 | uint32 dlen; | |
180 | ||
181 | len = str_len(addr); | |
182 | at = str_chr(addr, '@'); | |
183 | if (!addr[at]) | |
0a045fc1 | 184 | return (local(cdb, addr, len, sender, rc)); |
ca51b51d | 185 | |
0a045fc1 | 186 | if ((err = virt(cdb, addr, at, addr, len, sender, rc)) != 0) |
ca51b51d MW |
187 | return (err); |
188 | dot = at + 1; | |
189 | while (addr[dot]) { | |
0a045fc1 | 190 | if ((err = virt(cdb, addr, at, addr + dot, len - dot, sender, rc)) != 0) |
ca51b51d MW |
191 | return (err); |
192 | dot += byte_chr(addr + dot + 1, len - dot - 1, '.') + 1; | |
193 | } | |
194 | ||
0a045fc1 | 195 | if ((err = probe(cdb, '@', addr + at + 1, len - at - 1, 0, 0, &dlen)) < 0) |
ca51b51d MW |
196 | return (-1); |
197 | if (!err) { *rc = 1; return (0); } | |
198 | if (dlen != 0) { errno = EINVAL; return (-1); } | |
199 | ||
0a045fc1 | 200 | return (local(cdb, addr, at, sender, rc)); |
ca51b51d MW |
201 | } |
202 | ||
203 | #ifdef TEST | |
0a045fc1 | 204 | |
ca51b51d MW |
205 | #include <sys/types.h> |
206 | #include <unistd.h> | |
207 | #include <fcntl.h> | |
208 | #include <stdio.h> | |
209 | #include <errno.h> | |
210 | #include <unistd.h> | |
211 | ||
212 | int main(int argc, char *argv[]) | |
213 | { | |
214 | int fd; | |
215 | int rc; | |
216 | int i; | |
217 | ||
0a045fc1 MW |
218 | if (argc < 4) { |
219 | fprintf(stderr, "usage: addrcheck CDB SENDER ADDR...\n"); | |
ca51b51d MW |
220 | return (1); |
221 | } | |
222 | if ((fd = open(argv[1], O_RDONLY)) < 0) { | |
223 | perror(argv[1]); | |
224 | return (1); | |
225 | } | |
0a045fc1 MW |
226 | for (i = 3; i < argc; i++) { |
227 | if (addrcheck(fd, argv[i], argv[2], &rc) < 0) { | |
ca51b51d MW |
228 | perror("checking"); |
229 | return (1); | |
230 | } | |
231 | printf("%s: %s\n", argv[i], rc ? "ok" : "bad"); | |
232 | } | |
233 | return (0); | |
234 | } | |
235 | ||
236 | #endif |