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Annotation of 43BSDReno/usr.sbin/named/db_glue.c, revision 1.1

1.1     ! root        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 are permitted provided
        !             6:  * that: (1) source distributions retain this entire copyright notice and
        !             7:  * comment, and (2) distributions including binaries display the following
        !             8:  * acknowledgement:  ``This product includes software developed by the
        !             9:  * University of California, Berkeley and its contributors'' in the
        !            10:  * documentation or other materials provided with the distribution and in
        !            11:  * all advertising materials mentioning features or use of this software.
        !            12:  * Neither the name of the University nor the names of its contributors may
        !            13:  * be used to endorse or promote products derived from this software without
        !            14:  * specific prior written permission.
        !            15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            16:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            17:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            18:  */
        !            19: 
        !            20: #ifndef lint
        !            21: static char sccsid[] = "@(#)db_glue.c  4.4 (Berkeley) 6/1/90";
        !            22: #endif /* not lint */
        !            23: 
        !            24: #include <sys/param.h>
        !            25: #include <sys/time.h>
        !            26: #include <sys/stat.h>
        !            27: #include <netinet/in.h>
        !            28: #include <stdio.h>
        !            29: #include <syslog.h>
        !            30: #include <ctype.h>
        !            31: #include <netdb.h>
        !            32: #include <arpa/nameser.h>
        !            33: #include "ns.h"
        !            34: #include "db.h"
        !            35: 
        !            36: struct valuelist {
        !            37:        struct valuelist *next, *prev;
        !            38:        char    *name;
        !            39:        char    *proto;
        !            40:        short   port;
        !            41: } *servicelist, *protolist;
        !            42: 
        !            43: buildservicelist()
        !            44: {
        !            45:        struct servent *sp;
        !            46:        struct valuelist *slp;
        !            47: 
        !            48:        setservent(1);
        !            49:        while (sp = getservent()) {
        !            50:                slp = (struct valuelist *)malloc(sizeof(struct valuelist));
        !            51:                slp->name = savestr(sp->s_name);
        !            52:                slp->proto = savestr(sp->s_proto);
        !            53:                slp->port = ntohs((u_short)sp->s_port);
        !            54:                slp->next = servicelist;
        !            55:                slp->prev = NULL;
        !            56:                if (servicelist)
        !            57:                        servicelist->prev = slp;
        !            58:                servicelist = slp;
        !            59:        }
        !            60:        endservent();
        !            61: }
        !            62: 
        !            63: buildprotolist()
        !            64: {
        !            65:        struct protoent *pp;
        !            66:        struct valuelist *slp;
        !            67: 
        !            68:        setprotoent(1);
        !            69:        while (pp = getprotoent()) {
        !            70:                slp = (struct valuelist *)malloc(sizeof(struct valuelist));
        !            71:                slp->name = savestr(pp->p_name);
        !            72:                slp->port = pp->p_proto;
        !            73:                slp->next = protolist;
        !            74:                slp->prev = NULL;
        !            75:                if (protolist)
        !            76:                        protolist->prev = slp;
        !            77:                protolist = slp;
        !            78:        }
        !            79:        endprotoent();
        !            80: }
        !            81: 
        !            82: /*
        !            83:  * Convert service name or (ascii) number to int.
        !            84:  */
        !            85: servicenumber(p)
        !            86:        char *p;
        !            87: {
        !            88: 
        !            89:        return (findservice(p, &servicelist));
        !            90: }
        !            91: 
        !            92: /*
        !            93:  * Convert protocol name or (ascii) number to int.
        !            94:  */
        !            95: protocolnumber(p)
        !            96:        char *p;
        !            97: {
        !            98: 
        !            99:        return (findservice(p, &protolist));
        !           100: }
        !           101: 
        !           102: findservice(s, list)
        !           103:        register char *s;
        !           104:        register struct valuelist **list;
        !           105: {
        !           106:        register struct valuelist *lp = *list;
        !           107:        int n;
        !           108: 
        !           109:        for (; lp != NULL; lp = lp->next)
        !           110:                if (strcasecmp(lp->name, s) == 0) {
        !           111:                        if (lp != *list) {
        !           112:                                lp->prev->next = lp->next;
        !           113:                                if (lp->next)
        !           114:                                        lp->next->prev = lp->prev;
        !           115:                                (*list)->prev = lp;
        !           116:                                lp->next = *list;
        !           117:                                *list = lp;
        !           118:                        }
        !           119:                        return(lp->port);
        !           120:                }
        !           121:        if (sscanf(s, "%d", &n) != 1 || n <= 0)
        !           122:                n = -1;
        !           123:        return(n);
        !           124: }
        !           125: 
        !           126: struct servent *
        !           127: cgetservbyport(port, proto)
        !           128:        u_short port;
        !           129:        char *proto;
        !           130: {
        !           131:        register struct valuelist **list = &servicelist;
        !           132:        register struct valuelist *lp = *list;
        !           133:        static struct servent serv;
        !           134: 
        !           135:        port = htons(port);
        !           136:        for (; lp != NULL; lp = lp->next) {
        !           137:                if (port != lp->port)
        !           138:                        continue;
        !           139:                if (strcasecmp(lp->proto, proto) == 0) {
        !           140:                        if (lp != *list) {
        !           141:                                lp->prev->next = lp->next;
        !           142:                                if (lp->next)
        !           143:                                        lp->next->prev = lp->prev;
        !           144:                                (*list)->prev = lp;
        !           145:                                lp->next = *list;
        !           146:                                *list = lp;
        !           147:                        }
        !           148:                        serv.s_name = lp->name;
        !           149:                        serv.s_port = htons((u_short)lp->port);
        !           150:                        serv.s_proto = lp->proto;
        !           151:                        return(&serv);
        !           152:                }
        !           153:        }
        !           154:        return(0);
        !           155: }
        !           156: 
        !           157: struct protoent *
        !           158: cgetprotobynumber(proto)
        !           159:        register int proto;
        !           160: {
        !           161: 
        !           162:        register struct valuelist **list = &protolist;
        !           163:        register struct valuelist *lp = *list;
        !           164:        static struct protoent prot;
        !           165: 
        !           166:        for (; lp != NULL; lp = lp->next)
        !           167:                if (lp->port == proto) {
        !           168:                        if (lp != *list) {
        !           169:                                lp->prev->next = lp->next;
        !           170:                                if (lp->next)
        !           171:                                        lp->next->prev = lp->prev;
        !           172:                                (*list)->prev = lp;
        !           173:                                lp->next = *list;
        !           174:                                *list = lp;
        !           175:                        }
        !           176:                        prot.p_name = lp->name;
        !           177:                        prot.p_proto = lp->port;
        !           178:                        return(&prot);
        !           179:                }
        !           180:        return(0);
        !           181: }
        !           182: 
        !           183: char *
        !           184: protocolname(num)
        !           185:        int num;
        !           186: {
        !           187:        static  char number[8];
        !           188:        struct protoent *pp;
        !           189: 
        !           190:        pp = cgetprotobynumber(num);
        !           191:        if(pp == 0)  {
        !           192:                (void) sprintf(number, "%d", num);
        !           193:                return(number);
        !           194:        }
        !           195:        return(pp->p_name);
        !           196: }
        !           197: 
        !           198: char *
        !           199: servicename(port, proto)
        !           200:        u_short port;
        !           201:        char *proto;
        !           202: {
        !           203:        static  char number[8];
        !           204:        struct servent *ss;
        !           205: 
        !           206:        ss = cgetservbyport(htons(port), proto);
        !           207:        if(ss == 0)  {
        !           208:                (void) sprintf(number, "%d", port);
        !           209:                return(number);
        !           210:        }
        !           211:        return(ss->s_name);
        !           212: }

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