+++ /dev/null
-/** @file\r
- Copyright (c) 1999 - 2014, Intel Corporation. All rights reserved.<BR>\r
- This program and the accompanying materials are licensed and made available\r
- under the terms and conditions of the BSD License which accompanies this\r
- distribution. The full text of the license may be found at\r
- http://opensource.org/licenses/bsd-license.php.\r
-\r
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
-**/\r
-/*\r
- * Copyright (c) 1996 by Internet Software Consortium.\r
- *\r
- * Permission to use, copy, modify, and distribute this software for any\r
- * purpose with or without fee is hereby granted, provided that the above\r
- * copyright notice and this permission notice appear in all copies.\r
- *\r
- * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS\r
- * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES\r
- * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE\r
- * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL\r
- * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR\r
- * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS\r
- * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS\r
- * SOFTWARE.\r
- */\r
-\r
-/*\r
- * Portions copyright (c) 1999, 2000\r
- * Intel Corporation.\r
- * All rights reserved.\r
- *\r
- * Redistribution and use in source and binary forms, with or without\r
- * modification, are permitted provided that the following conditions\r
- * are met:\r
- *\r
- * 1. Redistributions of source code must retain the above copyright\r
- * notice, this list of conditions and the following disclaimer.\r
- *\r
- * 2. Redistributions in binary form must reproduce the above copyright\r
- * notice, this list of conditions and the following disclaimer in the\r
- * documentation and/or other materials provided with the distribution.\r
- *\r
- * 3. All advertising materials mentioning features or use of this software\r
- * must display the following acknowledgement:\r
- *\r
- * This product includes software developed by Intel Corporation and\r
- * its contributors.\r
- *\r
- * 4. Neither the name of Intel Corporation or its contributors may be\r
- * used to endorse or promote products derived from this software\r
- * without specific prior written permission.\r
- *\r
- * THIS SOFTWARE IS PROVIDED BY INTEL CORPORATION AND CONTRIBUTORS ``AS IS''\r
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\r
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\r
- * ARE DISCLAIMED. IN NO EVENT SHALL INTEL CORPORATION OR CONTRIBUTORS BE\r
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR\r
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF\r
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS\r
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN\r
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)\r
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF\r
- * THE POSSIBILITY OF SUCH DAMAGE.\r
- *\r
- */\r
-\r
-/*\r
- * Based on the Dynamic DNS reference implementation by Viraj Bais\r
- * <viraj_bais@ccm.fm.intel.com>\r
- */\r
-\r
-#include <sys/param.h>\r
-#include <sys/socket.h>\r
-#include <sys/time.h>\r
-#include <netinet/in.h>\r
-#include <arpa/inet.h>\r
-#include <arpa/nameser.h>\r
-#include <errno.h>\r
-#include <limits.h>\r
-#include <netdb.h>\r
-#include <resolv.h>\r
-#include <stdio.h>\r
-#include <stdlib.h>\r
-#include <string.h>\r
-\r
-/*\r
- * Separate a linked list of records into groups so that all records\r
- * in a group will belong to a single zone on the nameserver.\r
- * Create a dynamic update packet for each zone and send it to the\r
- * nameservers for that zone, and await answer.\r
- * Abort if error occurs in updating any zone.\r
- * Return the number of zones updated on success, < 0 on error.\r
- *\r
- * On error, caller must deal with the unsynchronized zones\r
- * eg. an A record might have been successfully added to the forward\r
- * zone but the corresponding PTR record would be missing if error\r
- * was encountered while updating the reverse zone.\r
- */\r
-\r
-#define NSMAX 16\r
-\r
-struct ns1 {\r
- char nsname[MAXDNAME];\r
- struct in_addr nsaddr1;\r
-};\r
-\r
-struct zonegrp {\r
- char z_origin[MAXDNAME];\r
- int16_t z_class;\r
- char z_soardata[MAXDNAME + 5 * INT32SZ];\r
- struct ns1 z_ns[NSMAX];\r
- int z_nscount;\r
- ns_updrec * z_rr;\r
- struct zonegrp *z_next;\r
-};\r
-\r
-\r
-int\r
-res_update(ns_updrec *rrecp_in) {\r
- ns_updrec *rrecp, *tmprrecp;\r
- u_char buf[PACKETSZ], answer[PACKETSZ], packet[2*PACKETSZ];\r
- char name[MAXDNAME], zname[MAXDNAME], primary[MAXDNAME],\r
- mailaddr[MAXDNAME];\r
- u_char soardata[2*MAXCDNAME+5*INT32SZ];\r
- char *dname, *svdname, *cp1, *target;\r
- u_char *cp, *eom;\r
- HEADER *hp = (HEADER *) answer;\r
- struct zonegrp *zptr = NULL, *tmpzptr, *prevzptr, *zgrp_start = NULL;\r
- int i, j, k = 0, n, ancount, nscount, arcount, rcode, rdatasize,\r
- newgroup, done, myzone, seen_before, numzones = 0;\r
- u_int16_t dlen, class, qclass, type, qtype;\r
- u_int32_t ttl;\r
-\r
- if ((_res.options & RES_INIT) == 0 && res_init() == -1) {\r
- h_errno = NETDB_INTERNAL;\r
- return (-1);\r
- }\r
-\r
- for (rrecp = rrecp_in; rrecp; rrecp = rrecp->r_next) {\r
- dname = rrecp->r_dname;\r
- n = (int)strlen(dname);\r
- if (dname[n-1] == '.')\r
- dname[n-1] = '\0';\r
- qtype = T_SOA;\r
- qclass = rrecp->r_class;\r
- done = 0;\r
- seen_before = 0;\r
-\r
- while (!done && dname) {\r
- if (qtype == T_SOA) {\r
- for (tmpzptr = zgrp_start;\r
- tmpzptr && !seen_before;\r
- tmpzptr = tmpzptr->z_next) {\r
- if (strcasecmp(dname,\r
- tmpzptr->z_origin) == 0 &&\r
- tmpzptr->z_class == qclass)\r
- seen_before++;\r
- for (tmprrecp = tmpzptr->z_rr;\r
- tmprrecp && !seen_before;\r
- tmprrecp = tmprrecp->r_grpnext)\r
- if (strcasecmp(dname, tmprrecp->r_dname) == 0\r
- && tmprrecp->r_class == qclass) {\r
- seen_before++;\r
- break;\r
- }\r
- if (seen_before) {\r
- /*\r
- * Append to the end of\r
- * current group.\r
- */\r
- for (tmprrecp = tmpzptr->z_rr;\r
- tmprrecp->r_grpnext;\r
- tmprrecp = tmprrecp->r_grpnext)\r
- (void)NULL;\r
- tmprrecp->r_grpnext = rrecp;\r
- rrecp->r_grpnext = NULL;\r
- done = 1;\r
- break;\r
- }\r
- }\r
- } else if (qtype == T_A) {\r
- for (tmpzptr = zgrp_start;\r
- tmpzptr && !done;\r
- tmpzptr = tmpzptr->z_next)\r
- for (i = 0; i < tmpzptr->z_nscount; i++)\r
- if (tmpzptr->z_class == qclass &&\r
- strcasecmp(tmpzptr->z_ns[i].nsname,\r
- dname) == 0 &&\r
- tmpzptr->z_ns[i].nsaddr1.s_addr != 0) {\r
- zptr->z_ns[k].nsaddr1.s_addr =\r
- tmpzptr->z_ns[i].nsaddr1.s_addr;\r
- done = 1;\r
- break;\r
- }\r
- }\r
- if (done)\r
- break;\r
- n = res_mkquery(QUERY, dname, qclass, qtype, NULL,\r
- 0, NULL, buf, sizeof buf);\r
- if (n <= 0) {\r
- fprintf(stderr, "res_update: mkquery failed\n");\r
- return (n);\r
- }\r
- n = res_send(buf, n, answer, sizeof answer);\r
- if (n < 0) {\r
- fprintf(stderr, "res_update: send error for %s\n",\r
- rrecp->r_dname);\r
- return (n);\r
- }\r
- if (n < HFIXEDSZ)\r
- return (-1);\r
- ancount = ntohs(hp->ancount);\r
- nscount = ntohs(hp->nscount);\r
- arcount = ntohs(hp->arcount);\r
- rcode = hp->rcode;\r
- cp = answer + HFIXEDSZ;\r
- eom = answer + n;\r
- /* skip the question section */\r
- n = dn_skipname(cp, eom);\r
- if (n < 0 || cp + n + 2 * INT16SZ > eom)\r
- return (-1);\r
- cp += n + 2 * INT16SZ;\r
-\r
- if (qtype == T_SOA) {\r
- if (ancount == 0 && nscount == 0 && arcount == 0) {\r
- /*\r
- * if (rcode == NOERROR) then the dname exists but\r
- * has no soa record associated with it.\r
- * if (rcode == NXDOMAIN) then the dname does not\r
- * exist and the server is replying out of NCACHE.\r
- * in either case, proceed with the next try\r
- */\r
- dname = strchr(dname, '.');\r
- if (dname != NULL)\r
- dname++;\r
- continue;\r
- } else if ((rcode == NOERROR || rcode == NXDOMAIN) &&\r
- ancount == 0 &&\r
- nscount == 1 && arcount == 0) {\r
- /*\r
- * name/data does not exist, soa record supplied in the\r
- * authority section\r
- */\r
- /* authority section must contain the soa record */\r
- if ((n = dn_expand(answer, eom, cp, zname,\r
- sizeof zname)) < 0)\r
- return (n);\r
- cp += n;\r
- if (cp + 2 * INT16SZ > eom)\r
- return (-1);\r
- GETSHORT(type, cp);\r
- GETSHORT(class, cp);\r
- if (type != T_SOA || class != qclass) {\r
- fprintf(stderr, "unknown answer\n");\r
- return (-1);\r
- }\r
- myzone = 0;\r
- svdname = dname;\r
- while (dname)\r
- if (strcasecmp(dname, zname) == 0) {\r
- myzone = 1;\r
- break;\r
- } else if ((dname = strchr(dname, '.')) != NULL)\r
- dname++;\r
- if (!myzone) {\r
- dname = strchr(svdname, '.');\r
- if (dname != NULL)\r
- dname++;\r
- continue;\r
- }\r
- nscount = 0;\r
- /* fallthrough */\r
- } else if (rcode == NOERROR && ancount == 1) {\r
- /*\r
- * found the zone name\r
- * new servers will supply NS records for the zone\r
- * in authority section and A records for those\r
- * nameservers in the additional section\r
- * older servers have to be explicitly queried for\r
- * NS records for the zone\r
- */\r
- /* answer section must contain the soa record */\r
- if ((n = dn_expand(answer, eom, cp, zname,\r
- sizeof zname)) < 0)\r
- return (n);\r
- else\r
- cp += n;\r
- if (cp + 2 * INT16SZ > eom)\r
- return (-1);\r
- GETSHORT(type, cp);\r
- GETSHORT(class, cp);\r
- if (type == T_CNAME) {\r
- dname = strchr(dname, '.');\r
- if (dname != NULL)\r
- dname++;\r
- continue;\r
- }\r
- if (strcasecmp(dname, zname) != 0 ||\r
- type != T_SOA ||\r
- class != rrecp->r_class) {\r
- fprintf(stderr, "unknown answer\n");\r
- return (-1);\r
- }\r
- /* FALLTHROUGH */\r
- } else {\r
- fprintf(stderr,\r
- "unknown response: ans=%d, auth=%d, add=%d, rcode=%d\n",\r
- ancount, nscount, arcount, hp->rcode);\r
- return (-1);\r
- }\r
- if (cp + INT32SZ + INT16SZ > eom)\r
- return (-1);\r
- /* continue processing the soa record */\r
- GETLONG(ttl, cp);\r
- GETSHORT(dlen, cp);\r
- if (cp + dlen > eom)\r
- return (-1);\r
- newgroup = 1;\r
- zptr = zgrp_start;\r
- prevzptr = NULL;\r
- while (zptr) {\r
- if (strcasecmp(zname, zptr->z_origin) == 0 &&\r
- type == T_SOA && class == qclass) {\r
- newgroup = 0;\r
- break;\r
- }\r
- prevzptr = zptr;\r
- zptr = zptr->z_next;\r
- }\r
- if (!newgroup) {\r
- for (tmprrecp = zptr->z_rr;\r
- tmprrecp->r_grpnext;\r
- tmprrecp = tmprrecp->r_grpnext)\r
- ;\r
- tmprrecp->r_grpnext = rrecp;\r
- rrecp->r_grpnext = NULL;\r
- done = 1;\r
- cp += dlen;\r
- break;\r
- } else {\r
- if ((n = dn_expand(answer, eom, cp, primary,\r
- sizeof primary)) < 0)\r
- return (n);\r
- cp += n;\r
- /*\r
- * We don't have to bounds check here because the\r
- * next use of 'cp' is in dn_expand().\r
- */\r
- cp1 = (char *)soardata;\r
- strcpy(cp1, primary);\r
- cp1 += strlen(cp1) + 1;\r
- if ((n = dn_expand(answer, eom, cp, mailaddr,\r
- sizeof mailaddr)) < 0)\r
- return (n);\r
- cp += n;\r
- strcpy(cp1, mailaddr);\r
- cp1 += strlen(cp1) + 1;\r
- if (cp + 5*INT32SZ > eom)\r
- return (-1);\r
- memcpy(cp1, cp, 5*INT32SZ);\r
- cp += 5*INT32SZ;\r
- cp1 += 5*INT32SZ;\r
- rdatasize = (int)((u_char *)cp1 - soardata);\r
- zptr = calloc(1, sizeof(struct zonegrp));\r
- if (zptr == NULL)\r
- return (-1);\r
- if (zgrp_start == NULL)\r
- zgrp_start = zptr;\r
- else\r
- prevzptr->z_next = zptr;\r
- zptr->z_rr = rrecp;\r
- rrecp->r_grpnext = NULL;\r
- strcpy(zptr->z_origin, zname);\r
- zptr->z_class = class;\r
- memcpy(zptr->z_soardata, soardata, rdatasize);\r
- /* fallthrough to process NS and A records */\r
- }\r
- } else if (qtype == T_NS) {\r
- if (rcode == NOERROR && ancount > 0) {\r
- strcpy(zname, dname);\r
- for (zptr = zgrp_start; zptr; zptr = zptr->z_next) {\r
- if (strcasecmp(zname, zptr->z_origin) == 0)\r
- break;\r
- }\r
- if (zptr == NULL)\r
- /* should not happen */\r
- return (-1);\r
- if (nscount > 0) {\r
- /*\r
- * answer and authority sections contain\r
- * the same information, skip answer section\r
- */\r
- for (j = 0; j < ancount; j++) {\r
- n = dn_skipname(cp, eom);\r
- if (n < 0)\r
- return (-1);\r
- n += 2*INT16SZ + INT32SZ;\r
- if (cp + n + INT16SZ > eom)\r
- return (-1);\r
- cp += n;\r
- GETSHORT(dlen, cp);\r
- cp += dlen;\r
- }\r
- } else\r
- nscount = ancount;\r
- /* fallthrough to process NS and A records */\r
- } else {\r
- fprintf(stderr, "cannot determine nameservers for %s:\\r
-ans=%d, auth=%d, add=%d, rcode=%d\n",\r
- dname, ancount, nscount, arcount, hp->rcode);\r
- return (-1);\r
- }\r
- } else if (qtype == T_A) {\r
- if (rcode == NOERROR && ancount > 0) {\r
- arcount = ancount;\r
- ancount = nscount = 0;\r
- /* fallthrough to process A records */\r
- } else {\r
- fprintf(stderr, "cannot determine address for %s:\\r
-ans=%d, auth=%d, add=%d, rcode=%d\n",\r
- dname, ancount, nscount, arcount, hp->rcode);\r
- return (-1);\r
- }\r
- }\r
- /* process NS records for the zone */\r
- j = 0;\r
- for (i = 0; i < nscount; i++) {\r
- if ((n = dn_expand(answer, eom, cp, name,\r
- sizeof name)) < 0)\r
- return (n);\r
- cp += n;\r
- if (cp + 3 * INT16SZ + INT32SZ > eom)\r
- return (-1);\r
- GETSHORT(type, cp);\r
- GETSHORT(class, cp);\r
- GETLONG(ttl, cp);\r
- GETSHORT(dlen, cp);\r
- if (cp + dlen > eom)\r
- return (-1);\r
- if (strcasecmp(name, zname) == 0 &&\r
- type == T_NS && class == qclass) {\r
- if ((n = dn_expand(answer, eom, cp,\r
- name, sizeof name)) < 0)\r
- return (n);\r
- target = zptr->z_ns[j++].nsname;\r
- strcpy(target, name);\r
- }\r
- cp += dlen;\r
- }\r
- if (zptr->z_nscount == 0)\r
- zptr->z_nscount = j;\r
- /* get addresses for the nameservers */\r
- for (i = 0; i < arcount; i++) {\r
- if ((n = dn_expand(answer, eom, cp, name,\r
- sizeof name)) < 0)\r
- return (n);\r
- cp += n;\r
- if (cp + 3 * INT16SZ + INT32SZ > eom)\r
- return (-1);\r
- GETSHORT(type, cp);\r
- GETSHORT(class, cp);\r
- GETLONG(ttl, cp);\r
- GETSHORT(dlen, cp);\r
- if (cp + dlen > eom)\r
- return (-1);\r
- if (type == T_A && dlen == INT32SZ && class == qclass) {\r
- for (j = 0; j < zptr->z_nscount; j++)\r
- if (strcasecmp(name, zptr->z_ns[j].nsname) == 0) {\r
- memcpy(&zptr->z_ns[j].nsaddr1.s_addr, cp,\r
- INT32SZ);\r
- break;\r
- }\r
- }\r
- cp += dlen;\r
- }\r
- if (zptr->z_nscount == 0) {\r
- dname = zname;\r
- qtype = T_NS;\r
- continue;\r
- }\r
- done = 1;\r
- for (k = 0; k < zptr->z_nscount; k++)\r
- if (zptr->z_ns[k].nsaddr1.s_addr == 0) {\r
- done = 0;\r
- dname = zptr->z_ns[k].nsname;\r
- qtype = T_A;\r
- }\r
- } /* while */\r
- }\r
- --ttl; // Suppress the "Set but not used" warning/error for ttl.\r
-\r
- _res.options |= RES_DEBUG;\r
- for (zptr = zgrp_start; zptr; zptr = zptr->z_next) {\r
-\r
- /* append zone section */\r
- rrecp = res_mkupdrec(ns_s_zn, zptr->z_origin,\r
- zptr->z_class, ns_t_soa, 0);\r
- if (rrecp == NULL) {\r
- fprintf(stderr, "saverrec error\n");\r
- fflush(stderr);\r
- return (-1);\r
- }\r
- rrecp->r_grpnext = zptr->z_rr;\r
- zptr->z_rr = rrecp;\r
-\r
- n = res_mkupdate(zptr->z_rr, packet, sizeof packet);\r
- if (n < 0) {\r
- fprintf(stderr, "res_mkupdate error\n");\r
- fflush(stderr);\r
- return (-1);\r
- } else\r
- fprintf(stdout, "res_mkupdate: packet size = %d\n", n);\r
-\r
- /* Override the list of NS records from res_init() with\r
- * the authoritative nameservers for the zone being updated.\r
- * Sort primary to be the first in the list of nameservers.\r
- */\r
- for (i = 0; i < zptr->z_nscount; i++) {\r
- if (strcasecmp(zptr->z_ns[i].nsname,\r
- zptr->z_soardata) == 0) {\r
- struct in_addr tmpaddr;\r
-\r
- if (i != 0) {\r
- strcpy(zptr->z_ns[i].nsname,\r
- zptr->z_ns[0].nsname);\r
- strcpy(zptr->z_ns[0].nsname,\r
- zptr->z_soardata);\r
- tmpaddr = zptr->z_ns[i].nsaddr1;\r
- zptr->z_ns[i].nsaddr1 =\r
- zptr->z_ns[0].nsaddr1;\r
- zptr->z_ns[0].nsaddr1 = tmpaddr;\r
- }\r
- break;\r
- }\r
- }\r
- for (i = 0; i < MAXNS; i++) {\r
- _res.nsaddr_list[i].sin_addr = zptr->z_ns[i].nsaddr1;\r
- _res.nsaddr_list[i].sin_family = AF_INET;\r
- _res.nsaddr_list[i].sin_port = htons(NAMESERVER_PORT);\r
- }\r
- _res.nscount = (zptr->z_nscount < MAXNS) ?\r
- zptr->z_nscount : MAXNS;\r
- n = res_send(packet, n, answer, sizeof(answer));\r
- if (n < 0) {\r
- fprintf(stderr, "res_send: send error, n=%d\n", n);\r
- break;\r
- } else\r
- numzones++;\r
- }\r
-\r
- /* free malloc'ed memory */\r
- while(zgrp_start) {\r
- zptr = zgrp_start;\r
- zgrp_start = zgrp_start->z_next;\r
- res_freeupdrec(zptr->z_rr); /* Zone section we allocated. */\r
- free((char *)zptr);\r
- }\r
-\r
- return (numzones);\r
-}\r
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