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[unix-history] / usr / src / lib / libc / net / res_debug.c

#ifndef lint
static char sccsid[] = "@(#)res_debug.c 4.3 (Berkeley) %G%";
#endif

#include <sys/types.h>
#include <netinet/in.h>
#include <stdio.h>
#include <nameser.h>

extern char *p_cdname(), *p_rr(), *p_type(), *p_class();
extern char *inet_ntoa();

char *opcodes[] = {
       "QUERY",
       "IQUERY",
       "CQUERYM",
       "CQUERYU",
       "4",
       "5",
       "6",
       "7",
       "8",
       "9",
       "10",
       "UPDATEA",
       "UPDATED",
       "UPDATEM",
       "ZONEINIT",
       "ZONEREF",
};

char *rcodes[] = {
       "NOERROR",
       "FORMERR",
       "SERVFAIL",
       "NXDOMAIN",
       "NOTIMP",
       "REFUSED",
       "6",
       "7",
       "8",
       "9",
       "10",
       "11",
       "12",
       "13",
       "14",
       "NOCHANGE",
};

/*
* Print the contents of a query.
* This is intended to be primarily a debugging routine.
*/
p_query(msg)
       char *msg;
{
       register char *cp;
       register HEADER *hp;
       register int n;

       /*
        * Print header fields.
        */
       hp = (HEADER *)msg;
       cp = msg + sizeof(HEADER);
       printf("HEADER:\n");
       printf("\topcode = %s", opcodes[hp->opcode]);
       printf(", id = %d", ntohs(hp->id));
       printf(", rcode = %s\n", rcodes[hp->rcode]);
       printf("\theader flags: ");
       if (hp->qr)
               printf(" qr");
       if (hp->aa)
               printf(" aa");
       if (hp->tc)
               printf(" tc");
       if (hp->rd)
               printf(" rd");
       if (hp->ra)
               printf(" ra");
       if (hp->pr)
               printf(" pr");
       printf("\n\tqdcount = %d", ntohs(hp->qdcount));
       printf(", ancount = %d", ntohs(hp->ancount));
       printf(", nscount = %d", ntohs(hp->nscount));
       printf(", arcount = %d\n\n", ntohs(hp->arcount));
       /*
        * Print question records.
        */
       if (n = ntohs(hp->qdcount)) {
               printf("QUESTIONS:\n");
               while (--n >= 0) {
                       printf("\t");
                       cp = p_cdname(cp, msg);
                       if (cp == NULL)
                               return;
                       printf(", type = %s", p_type(getshort(cp)));
                       cp += sizeof(u_short);
                       printf(", class = %s\n\n", p_class(getshort(cp)));
                       cp += sizeof(u_short);
               }
       }
       /*
        * Print authoritative answer records
        */
       if (n = ntohs(hp->ancount)) {
               printf("ANSWERS:\n");
               while (--n >= 0) {
                       printf("\t");
                       cp = p_rr(cp, msg);
                       if (cp == NULL)
                               return;
               }
       }
       /*
        * print name server records
        */
       if (n = ntohs(hp->nscount)) {
               printf("NAME SERVERS:\n");
               while (--n >= 0) {
                       printf("\t");
                       cp = p_rr(cp, msg);
                       if (cp == NULL)
                               return;
               }
       }
       /*
        * print additional records
        */
       if (n = ntohs(hp->arcount)) {
               printf("ADDITIONAL RECORDS:\n");
               while (--n >= 0) {
                       printf("\t");
                       cp = p_rr(cp, msg);
                       if (cp == NULL)
                               return;
               }
       }
}

char *
p_cdname(cp, msg)
       char *cp, *msg;
{
       char name[MAXDNAME];
       int n;

       if ((n = dn_expand(msg, cp, name, sizeof(name))) < 0)
               return (NULL);
       if (name[0] == '\0') {
               name[0] = '.';
               name[1] = '\0';
       }
       fputs(name, stdout);
       return (cp + n);
}

/*
* Print resource record fields in human readable form.
*/
char *
p_rr(cp, msg)
       char *cp, *msg;
{
       int type, class, dlen, n, c;
       struct in_addr inaddr;
       char *cp1;

       if ((cp = p_cdname(cp, msg)) == NULL)
               return (NULL);                  /* compression error */
       printf("\n\ttype = %s", p_type(type = getshort(cp)));
       cp += sizeof(u_short);
       printf(", class = %s", p_class(class = getshort(cp)));
       cp += sizeof(u_short);
       printf(", ttl = %ld", getlong(cp));
       cp += sizeof(u_long);
       printf(", dlen = %d\n", dlen = getshort(cp));
       cp += sizeof(u_short);
       cp1 = cp;
       /*
        * Print type specific data, if appropriate
        */
       switch (type) {
       case T_A:
               switch (class) {
               case C_IN:
                       bcopy(cp, (char *)&inaddr, sizeof(inaddr));
                       if (dlen == 4) {
                               printf("\tinternet address = %s\n",
                                       inet_ntoa(inaddr));
                               cp += dlen;
                       } else if (dlen == 7) {
                               printf("\tinternet address = %s",
                                       inet_ntoa(inaddr));
                               printf(", protocol = %d", cp[4]);
                               printf(", port = %d\n",
                                       (cp[5] << 8) + cp[6]);
                               cp += dlen;
                       }
                       break;
               }
               break;
       case T_CNAME:
       case T_MB:
       case T_MD:
       case T_MF:
       case T_MG:
       case T_MR:
       case T_NS:
       case T_PTR:
               printf("\tdomain name = ");
               cp = p_cdname(cp, msg);
               printf("\n");
               break;

       case T_HINFO:
               if (n = *cp++) {
                       printf("\tCPU=%.*s\n", n, cp);
                       cp += n;
               }
               if (n = *cp++) {
                       printf("\tOS=%.*s\n", n, cp);
                       cp += n;
               }
               break;

       case T_SOA:
               printf("\torigin = ");
               cp = p_cdname(cp, msg);
               printf("\n\tmail addr = ");
               cp = p_cdname(cp, msg);
               printf("\n\tserial=%ld", getlong(cp));
               cp += sizeof(u_long);
               printf(", refresh=%ld", getlong(cp));
               cp += sizeof(u_long);
               printf(", retry=%ld", getlong(cp));
               cp += sizeof(u_long);
               printf(", expire=%ld", getlong(cp));
               cp += sizeof(u_long);
               printf(", min=%ld\n", getlong(cp));
               cp += sizeof(u_long);
               break;

       case T_MINFO:
               printf("\trequests = ");
               cp = p_cdname(cp, msg);
               printf("\n\terrors = ");
               cp = p_cdname(cp, msg);
               break;

       case T_UINFO:
               printf("\t%s\n", cp);
               cp += dlen;
               break;

       case T_UID:
       case T_GID:
               if (dlen == 4) {
                       printf("\t%ld\n", getlong(cp));
                       cp += sizeof(int);
               }
               break;

       case T_WKS:
               if (dlen < sizeof(u_long) + 1)
                       break;
               bcopy(cp, (char *)&inaddr, sizeof(inaddr));
               cp += sizeof(u_long);
               printf("\tinternet address = %s, protocol = %d\n\t",
                       inet_ntoa(inaddr), *cp++);
               n = 0;
               while (cp < cp1 + dlen) {
                       c = *cp++;
                       do {
                               if (c & 1)
                                       printf(" %d", n);
                               c >>= 1;
                       } while (++n & 07);
               }
               putchar('\n');
               break;

       default:
               printf("\t???\n");
               cp += dlen;
       }
       if (cp != cp1 + dlen)
               printf("packet size error (%#x != %#x)\n", cp, cp1+dlen);
       printf("\n");
       return (cp);
}

static  char nbuf[20];
extern  char *sprintf();

/*
* Return a string for the type
*/
char *
p_type(type)
       int type;
{

       switch (type) {
       case T_A:
               return("A");
       case T_NS:              /* authoritative server */
               return("NS");
       case T_MD:              /* mail destination */
               return("MD");
       case T_MF:              /* mail forwarder */
               return("MF");
       case T_CNAME:           /* connonical name */
               return("CNAME");
       case T_SOA:             /* start of authority zone */
               return("SOA");
       case T_MB:              /* mailbox domain name */
               return("MB");
       case T_MG:              /* mail group member */
               return("MG");
       case T_MR:              /* mail rename name */
               return("MR");
       case T_NULL:            /* null resource record */
               return("NULL");
       case T_WKS:             /* well known service */
               return("WKS");
       case T_PTR:             /* domain name pointer */
               return("PTR");
       case T_HINFO:           /* host information */
               return("HINFO");
       case T_MINFO:           /* mailbox information */
               return("MINFO");
       case T_AXFR:            /* zone transfer */
               return("AXFR");
       case T_MAILB:           /* mail box */
               return("MAILB");
       case T_MAILA:           /* mail address */
               return("MAILA");
       case T_ANY:             /* matches any type */
               return("ANY");
       case T_UINFO:
               return("UINFO");
       case T_UID:
               return("UID");
       case T_GID:
               return("GID");
       default:
               return (sprintf(nbuf, "%d", type));
       }
}

/*
* Return a mnemonic for class
*/
char *
p_class(class)
       int class;
{

       switch (class) {
       case C_IN:              /* internet class */
               return("IN");
       case C_CS:              /* csnet class */
               return("CS");
       case C_ANY:             /* matches any class */
               return("ANY");
       default:
               return (sprintf(nbuf, "%d", class));
       }
}