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15637ed4 RG |
1 | /* |
2 | * Copyright (c) 1986, 1988 Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * 3. All advertising materials mentioning features or use of this software | |
14 | * must display the following acknowledgement: | |
15 | * This product includes software developed by the University of | |
16 | * California, Berkeley and its contributors. | |
17 | * 4. Neither the name of the University nor the names of its contributors | |
18 | * may be used to endorse or promote products derived from this software | |
19 | * without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
31 | * SUCH DAMAGE. | |
32 | */ | |
33 | ||
34 | #ifndef lint | |
35 | static char sccsid[] = "@(#)db_glue.c 4.4 (Berkeley) 6/1/90"; | |
36 | #endif /* not lint */ | |
37 | ||
38 | #include <sys/param.h> | |
39 | #include <sys/time.h> | |
40 | #include <sys/stat.h> | |
41 | #include <netinet/in.h> | |
42 | #include <stdio.h> | |
43 | #include <syslog.h> | |
44 | #include <ctype.h> | |
45 | #include <netdb.h> | |
46 | #include <arpa/nameser.h> | |
47 | #include "ns.h" | |
48 | #include "db.h" | |
49 | ||
50 | struct valuelist { | |
51 | struct valuelist *next, *prev; | |
52 | char *name; | |
53 | char *proto; | |
54 | short port; | |
55 | } *servicelist, *protolist; | |
56 | ||
57 | buildservicelist() | |
58 | { | |
59 | struct servent *sp; | |
60 | struct valuelist *slp; | |
61 | ||
62 | setservent(1); | |
63 | while (sp = getservent()) { | |
64 | slp = (struct valuelist *)malloc(sizeof(struct valuelist)); | |
65 | slp->name = savestr(sp->s_name); | |
66 | slp->proto = savestr(sp->s_proto); | |
67 | slp->port = ntohs((u_short)sp->s_port); | |
68 | slp->next = servicelist; | |
69 | slp->prev = NULL; | |
70 | if (servicelist) | |
71 | servicelist->prev = slp; | |
72 | servicelist = slp; | |
73 | } | |
74 | endservent(); | |
75 | } | |
76 | ||
77 | buildprotolist() | |
78 | { | |
79 | struct protoent *pp; | |
80 | struct valuelist *slp; | |
81 | ||
82 | setprotoent(1); | |
83 | while (pp = getprotoent()) { | |
84 | slp = (struct valuelist *)malloc(sizeof(struct valuelist)); | |
85 | slp->name = savestr(pp->p_name); | |
86 | slp->port = pp->p_proto; | |
87 | slp->next = protolist; | |
88 | slp->prev = NULL; | |
89 | if (protolist) | |
90 | protolist->prev = slp; | |
91 | protolist = slp; | |
92 | } | |
93 | endprotoent(); | |
94 | } | |
95 | ||
96 | /* | |
97 | * Convert service name or (ascii) number to int. | |
98 | */ | |
99 | servicenumber(p) | |
100 | char *p; | |
101 | { | |
102 | ||
103 | return (findservice(p, &servicelist)); | |
104 | } | |
105 | ||
106 | /* | |
107 | * Convert protocol name or (ascii) number to int. | |
108 | */ | |
109 | protocolnumber(p) | |
110 | char *p; | |
111 | { | |
112 | ||
113 | return (findservice(p, &protolist)); | |
114 | } | |
115 | ||
116 | findservice(s, list) | |
117 | register char *s; | |
118 | register struct valuelist **list; | |
119 | { | |
120 | register struct valuelist *lp = *list; | |
121 | int n; | |
122 | ||
123 | for (; lp != NULL; lp = lp->next) | |
124 | if (strcasecmp(lp->name, s) == 0) { | |
125 | if (lp != *list) { | |
126 | lp->prev->next = lp->next; | |
127 | if (lp->next) | |
128 | lp->next->prev = lp->prev; | |
129 | (*list)->prev = lp; | |
130 | lp->next = *list; | |
131 | *list = lp; | |
132 | } | |
133 | return(lp->port); | |
134 | } | |
135 | if (sscanf(s, "%d", &n) != 1 || n <= 0) | |
136 | n = -1; | |
137 | return(n); | |
138 | } | |
139 | ||
140 | struct servent * | |
141 | cgetservbyport(port, proto) | |
142 | u_short port; | |
143 | char *proto; | |
144 | { | |
145 | register struct valuelist **list = &servicelist; | |
146 | register struct valuelist *lp = *list; | |
147 | static struct servent serv; | |
148 | ||
149 | port = htons(port); | |
150 | for (; lp != NULL; lp = lp->next) { | |
151 | if (port != lp->port) | |
152 | continue; | |
153 | if (strcasecmp(lp->proto, proto) == 0) { | |
154 | if (lp != *list) { | |
155 | lp->prev->next = lp->next; | |
156 | if (lp->next) | |
157 | lp->next->prev = lp->prev; | |
158 | (*list)->prev = lp; | |
159 | lp->next = *list; | |
160 | *list = lp; | |
161 | } | |
162 | serv.s_name = lp->name; | |
163 | serv.s_port = htons((u_short)lp->port); | |
164 | serv.s_proto = lp->proto; | |
165 | return(&serv); | |
166 | } | |
167 | } | |
168 | return(0); | |
169 | } | |
170 | ||
171 | struct protoent * | |
172 | cgetprotobynumber(proto) | |
173 | register int proto; | |
174 | { | |
175 | ||
176 | register struct valuelist **list = &protolist; | |
177 | register struct valuelist *lp = *list; | |
178 | static struct protoent prot; | |
179 | ||
180 | for (; lp != NULL; lp = lp->next) | |
181 | if (lp->port == proto) { | |
182 | if (lp != *list) { | |
183 | lp->prev->next = lp->next; | |
184 | if (lp->next) | |
185 | lp->next->prev = lp->prev; | |
186 | (*list)->prev = lp; | |
187 | lp->next = *list; | |
188 | *list = lp; | |
189 | } | |
190 | prot.p_name = lp->name; | |
191 | prot.p_proto = lp->port; | |
192 | return(&prot); | |
193 | } | |
194 | return(0); | |
195 | } | |
196 | ||
197 | char * | |
198 | protocolname(num) | |
199 | int num; | |
200 | { | |
201 | static char number[8]; | |
202 | struct protoent *pp; | |
203 | ||
204 | pp = cgetprotobynumber(num); | |
205 | if(pp == 0) { | |
206 | (void) sprintf(number, "%d", num); | |
207 | return(number); | |
208 | } | |
209 | return(pp->p_name); | |
210 | } | |
211 | ||
212 | char * | |
213 | servicename(port, proto) | |
214 | u_short port; | |
215 | char *proto; | |
216 | { | |
217 | static char number[8]; | |
218 | struct servent *ss; | |
219 | ||
220 | ss = cgetservbyport(htons(port), proto); | |
221 | if(ss == 0) { | |
222 | (void) sprintf(number, "%d", port); | |
223 | return(number); | |
224 | } | |
225 | return(ss->s_name); | |
226 | } |