summaryrefslogtreecommitdiffstats
path: root/c/src/lib/libnetworking/libc/res_mkupdate.c
diff options
context:
space:
mode:
Diffstat (limited to 'c/src/lib/libnetworking/libc/res_mkupdate.c')
-rw-r--r--c/src/lib/libnetworking/libc/res_mkupdate.c415
1 files changed, 0 insertions, 415 deletions
diff --git a/c/src/lib/libnetworking/libc/res_mkupdate.c b/c/src/lib/libnetworking/libc/res_mkupdate.c
deleted file mode 100644
index 56362f650b..0000000000
--- a/c/src/lib/libnetworking/libc/res_mkupdate.c
+++ /dev/null
@@ -1,415 +0,0 @@
-/*
- * Copyright (c) 1996 by Internet Software Consortium.
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
- * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
- * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
- * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
- * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
- * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
- * SOFTWARE.
- */
-
-/*
- * Based on the Dynamic DNS reference implementation by Viraj Bais
- * <viraj_bais@ccm.fm.intel.com>
- */
-
-#if !defined(__rtems__)
-#if !defined(lint) && !defined(SABER)
-static char rcsid[] = "$Id$";
-#endif /* not lint */
-#endif /* not rtems */
-
-#include <sys/types.h>
-#include <sys/param.h>
-
-#include <netinet/in.h>
-#include <arpa/nameser.h>
-#include <arpa/inet.h>
-
-#include <errno.h>
-#include <limits.h>
-#include <netdb.h>
-#include <resolv.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <ctype.h>
-
-#include "res_config.h"
-
-static int getnum_str(u_char **, u_char *);
-static int getword_str(char *, int, u_char **, u_char *);
-
-#define ShrinkBuffer(x) if ((buflen -= x) < 0) return (-2);
-
-/*
- * Form update packets.
- * Returns the size of the resulting packet if no error
- * On error,
- * returns -1 if error in reading a word/number in rdata
- * portion for update packets
- * -2 if length of buffer passed is insufficient
- * -3 if zone section is not the first section in
- * the linked list, or section order has a problem
- * -4 on a number overflow
- * -5 unknown operation or no records
- */
-int
-res_mkupdate(ns_updrec *rrecp_in, u_char *buf, int buflen) {
- ns_updrec *rrecp_start = rrecp_in;
- HEADER *hp;
- u_char *cp, *sp1, *sp2, *startp, *endp;
- int n, i, soanum, multiline;
- ns_updrec *rrecp;
- struct in_addr ina;
- char buf2[MAXDNAME];
- int section, numrrs = 0, counts[ns_s_max];
- u_int16_t rtype, rclass;
- u_int32_t n1, rttl;
- u_char *dnptrs[20], **dpp, **lastdnptr;
-
- if ((_res.options & RES_INIT) == 0 && res_init() == -1) {
- h_errno = NETDB_INTERNAL;
- return (-1);
- }
-
- /*
- * Initialize header fields.
- */
- if ((buf == NULL) || (buflen < HFIXEDSZ))
- return (-1);
- memset(buf, 0, HFIXEDSZ);
- hp = (HEADER *) buf;
- hp->id = htons(++_res.id);
- hp->opcode = ns_o_update;
- hp->rcode = NOERROR;
- sp1 = buf + 2*INT16SZ; /* save pointer to zocount */
- cp = buf + HFIXEDSZ;
- buflen -= HFIXEDSZ;
- dpp = dnptrs;
- *dpp++ = buf;
- *dpp++ = NULL;
- lastdnptr = dnptrs + sizeof dnptrs / sizeof dnptrs[0];
-
- if (rrecp_start == NULL)
- return (-5);
- else if (rrecp_start->r_section != S_ZONE)
- return (-3);
-
- memset(counts, 0, sizeof counts);
- for (rrecp = rrecp_start; rrecp; rrecp = rrecp->r_grpnext) {
- numrrs++;
- section = rrecp->r_section;
- if (section < 0 || section >= ns_s_max)
- return (-1);
- counts[section]++;
- for (i = section + 1; i < ns_s_max; i++)
- if (counts[i])
- return (-3);
- rtype = rrecp->r_type;
- rclass = rrecp->r_class;
- rttl = rrecp->r_ttl;
- /* overload class and type */
- if (section == S_PREREQ) {
- rttl = 0;
- switch (rrecp->r_opcode) {
- case YXDOMAIN:
- rclass = C_ANY;
- rtype = T_ANY;
- rrecp->r_size = 0;
- break;
- case NXDOMAIN:
- rclass = C_NONE;
- rtype = T_ANY;
- rrecp->r_size = 0;
- break;
- case NXRRSET:
- rclass = C_NONE;
- rrecp->r_size = 0;
- break;
- case YXRRSET:
- if (rrecp->r_size == 0)
- rclass = C_ANY;
- break;
- default:
- fprintf(stderr,
- "res_mkupdate: incorrect opcode: %d\n",
- rrecp->r_opcode);
- fflush(stderr);
- return (-1);
- }
- } else if (section == S_UPDATE) {
- switch (rrecp->r_opcode) {
- case DELETE:
- rclass = rrecp->r_size == 0 ? C_ANY : C_NONE;
- break;
- case ADD:
- break;
- default:
- fprintf(stderr,
- "res_mkupdate: incorrect opcode: %d\n",
- rrecp->r_opcode);
- fflush(stderr);
- return (-1);
- }
- }
-
- /*
- * XXX appending default domain to owner name is omitted,
- * fqdn must be provided
- */
- if ((n = dn_comp(rrecp->r_dname, cp, buflen, dnptrs,
- lastdnptr)) < 0)
- return (-1);
- cp += n;
- ShrinkBuffer(n + 2*INT16SZ);
- PUTSHORT(rtype, cp);
- PUTSHORT(rclass, cp);
- if (section == S_ZONE) {
- if (numrrs != 1 || rrecp->r_type != T_SOA)
- return (-3);
- continue;
- }
- ShrinkBuffer(INT32SZ + INT16SZ);
- PUTLONG(rttl, cp);
- sp2 = cp; /* save pointer to length byte */
- cp += INT16SZ;
- if (rrecp->r_size == 0) {
- if (section == S_UPDATE && rclass != C_ANY)
- return (-1);
- else {
- PUTSHORT(0, sp2);
- continue;
- }
- }
- startp = rrecp->r_data;
- endp = startp + rrecp->r_size - 1;
- /* XXX this should be done centrally. */
- switch (rrecp->r_type) {
- case T_A:
- if (!getword_str(buf2, sizeof buf2, &startp, endp))
- return (-1);
- if (!inet_aton(buf2, &ina))
- return (-1);
- n1 = ntohl(ina.s_addr);
- ShrinkBuffer(INT32SZ);
- PUTLONG(n1, cp);
- break;
- case T_CNAME:
- case T_MB:
- case T_MG:
- case T_MR:
- case T_NS:
- case T_PTR:
- if (!getword_str(buf2, sizeof buf2, &startp, endp))
- return (-1);
- n = dn_comp(buf2, cp, buflen, dnptrs, lastdnptr);
- if (n < 0)
- return (-1);
- cp += n;
- ShrinkBuffer(n);
- break;
- case T_MINFO:
- case T_SOA:
- case T_RP:
- for (i = 0; i < 2; i++) {
- if (!getword_str(buf2, sizeof buf2, &startp,
- endp))
- return (-1);
- n = dn_comp(buf2, cp, buflen,
- dnptrs, lastdnptr);
- if (n < 0)
- return (-1);
- cp += n;
- ShrinkBuffer(n);
- }
- if (rrecp->r_type == T_SOA) {
- ShrinkBuffer(5 * INT32SZ);
- while (isspace(*startp) || !*startp)
- startp++;
- if (*startp == '(') {
- multiline = 1;
- startp++;
- } else
- multiline = 0;
- /* serial, refresh, retry, expire, minimum */
- for (i = 0; i < 5; i++) {
- soanum = getnum_str(&startp, endp);
- if (soanum < 0)
- return (-1);
- PUTLONG(soanum, cp);
- }
- if (multiline) {
- while (isspace(*startp) || !*startp)
- startp++;
- if (*startp != ')')
- return (-1);
- }
- }
- break;
- case T_MX:
- case T_AFSDB:
- case T_RT:
- n = getnum_str(&startp, endp);
- if (n < 0)
- return (-1);
- PUTSHORT(n, cp);
- ShrinkBuffer(INT16SZ);
- if (!getword_str(buf2, sizeof buf2, &startp, endp))
- return (-1);
- n = dn_comp(buf2, cp, buflen, dnptrs, lastdnptr);
- if (n < 0)
- return (-1);
- cp += n;
- ShrinkBuffer(n);
- break;
- case T_PX:
- n = getnum_str(&startp, endp);
- if (n < 0)
- return (-1);
- PUTSHORT(n, cp);
- ShrinkBuffer(INT16SZ);
- for (i = 0; i < 2; i++) {
- if (!getword_str(buf2, sizeof buf2, &startp,
- endp))
- return (-1);
- n = dn_comp(buf2, cp, buflen, dnptrs,
- lastdnptr);
- if (n < 0)
- return (-1);
- cp += n;
- ShrinkBuffer(n);
- }
- break;
- case T_WKS:
- case T_HINFO:
- case T_TXT:
- case T_X25:
- case T_ISDN:
- case T_NSAP:
- case T_LOC:
- /* XXX - more fine tuning needed here */
- ShrinkBuffer(rrecp->r_size);
- memcpy(cp, rrecp->r_data, rrecp->r_size);
- cp += rrecp->r_size;
- break;
- default:
- return (-1);
- } /*switch*/
- n = (u_int16_t)((cp - sp2) - INT16SZ);
- PUTSHORT(n, sp2);
- } /*for*/
-
- hp->qdcount = htons(counts[0]);
- hp->ancount = htons(counts[1]);
- hp->nscount = htons(counts[2]);
- hp->arcount = htons(counts[3]);
- return (cp - buf);
-}
-
-/*
- * Get a whitespace delimited word from a string (not file)
- * into buf. modify the start pointer to point after the
- * word in the string.
- */
-static int
-getword_str(char *buf, int size, u_char **startpp, u_char *endp) {
- char *cp;
- int c;
-
- for (cp = buf; *startpp <= endp; ) {
- c = **startpp;
- if (isspace(c) || c == '\0') {
- if (cp != buf) /* trailing whitespace */
- break;
- else { /* leading whitespace */
- (*startpp)++;
- continue;
- }
- }
- (*startpp)++;
- if (cp >= buf+size-1)
- break;
- *cp++ = (u_char)c;
- }
- *cp = '\0';
- return (cp != buf);
-}
-
-/*
- * Get a whitespace delimited number from a string (not file) into buf
- * update the start pointer to point after the number in the string.
- */
-static int
-getnum_str(u_char **startpp, u_char *endp) {
- int c, n;
- int seendigit = 0;
- int m = 0;
-
- for (n = 0; *startpp <= endp; ) {
- c = **startpp;
- if (isspace(c) || c == '\0') {
- if (seendigit) /* trailing whitespace */
- break;
- else { /* leading whitespace */
- (*startpp)++;
- continue;
- }
- }
- if (c == ';') {
- while ((*startpp <= endp) &&
- ((c = **startpp) != '\n'))
- (*startpp)++;
- if (seendigit)
- break;
- continue;
- }
- if (!isdigit(c)) {
- if (c == ')' && seendigit) {
- (*startpp)--;
- break;
- }
- return (-1);
- }
- (*startpp)++;
- n = n * 10 + (c - '0');
- seendigit = 1;
- }
- return (n + m);
-}
-
-/*
- * Allocate a resource record buffer & save rr info.
- */
-ns_updrec *
-res_mkupdrec(int section, const char *dname,
- u_int class, u_int type, u_long ttl) {
- ns_updrec *rrecp = (ns_updrec *)calloc(1, sizeof(ns_updrec));
-
- if (!rrecp || !(rrecp->r_dname = strdup(dname)))
- return (NULL);
- rrecp->r_class = class;
- rrecp->r_type = type;
- rrecp->r_ttl = ttl;
- rrecp->r_section = section;
- return (rrecp);
-}
-
-/*
- * Free a resource record buffer created by res_mkupdrec.
- */
-void
-res_freeupdrec(ns_updrec *rrecp) {
- /* Note: freeing r_dp is the caller's responsibility. */
- if (rrecp->r_dname != NULL)
- free(rrecp->r_dname);
- free(rrecp);
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-30 18:33:11 +0000