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Diffstat (limited to 'external/unbound/testcode/pktview.c')
| -rw-r--r-- | external/unbound/testcode/pktview.c | 202 |
1 files changed, 0 insertions, 202 deletions
diff --git a/external/unbound/testcode/pktview.c b/external/unbound/testcode/pktview.c deleted file mode 100644 index 12e0d8edb..000000000 --- a/external/unbound/testcode/pktview.c +++ /dev/null @@ -1,202 +0,0 @@ -/* - * testcode/pktview.c - debug program to disassemble a DNS packet. - * - * Copyright (c) 2007, NLnet Labs. All rights reserved. - * - * This software is open source. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * Redistributions of source code must retain the above copyright notice, - * this list of conditions and the following disclaimer. - * - * Redistributions in binary form must reproduce the above copyright notice, - * this list of conditions and the following disclaimer in the documentation - * and/or other materials provided with the distribution. - * - * Neither the name of the NLNET LABS nor the names of its contributors may - * be used to endorse or promote products derived from this software without - * specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED - * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR - * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF - * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING - * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS - * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -/** - * \file - * - * This program shows a dns packet wire format. - */ - -#include "config.h" -#include "util/log.h" -#include "util/data/dname.h" -#include "util/data/msgparse.h" -#include "testcode/unitmain.h" -#include "testcode/readhex.h" -#include "sldns/sbuffer.h" -#include "sldns/parseutil.h" - -/** usage information for pktview */ -static void usage(char* argv[]) -{ - printf("usage: %s\n", argv[0]); - printf("present hex packet on stdin.\n"); - exit(1); -} - -/** read hex input */ -static void read_input(sldns_buffer* pkt, FILE* in) -{ - char buf[102400]; - char* np = buf; - while(fgets(np, (int)sizeof(buf) - (np-buf), in)) { - if(buf[0] == ';') /* comment */ - continue; - np = &np[strlen(np)]; - } - hex_to_buf(pkt, buf); -} - -/** analyze domain name in packet, possibly compressed */ -static void analyze_dname(sldns_buffer* pkt) -{ - size_t oldpos = sldns_buffer_position(pkt); - size_t len; - printf("[pos %d] dname: ", (int)oldpos); - dname_print(stdout, pkt, sldns_buffer_current(pkt)); - len = pkt_dname_len(pkt); - printf(" len=%d", (int)len); - if(sldns_buffer_position(pkt)-oldpos != len) - printf(" comprlen=%d\n", - (int)(sldns_buffer_position(pkt)-oldpos)); - else printf("\n"); -} - -/** analyze rdata in packet */ -static void analyze_rdata(sldns_buffer*pkt, const sldns_rr_descriptor* desc, - uint16_t rdlen) -{ - int rdf = 0; - int count = (int)desc->_dname_count; - size_t len, oldpos; - while(rdlen > 0 && count) { - switch(desc->_wireformat[rdf]) { - case LDNS_RDF_TYPE_DNAME: - oldpos = sldns_buffer_position(pkt); - analyze_dname(pkt); - rdlen -= sldns_buffer_position(pkt)-oldpos; - count --; - len = 0; - break; - case LDNS_RDF_TYPE_STR: - len = sldns_buffer_current(pkt)[0] + 1; - break; - default: - len = get_rdf_size(desc->_wireformat[rdf]); - } - if(len) { - printf(" wf[%d]", (int)len); - sldns_buffer_skip(pkt, (ssize_t)len); - rdlen -= len; - } - rdf++; - } - if(rdlen) { - size_t i; - printf(" remain[%d]\n", (int)rdlen); - for(i=0; i<rdlen; i++) - printf(" %2.2X", (unsigned)sldns_buffer_current(pkt)[i]); - printf("\n"); - } - else printf("\n"); - sldns_buffer_skip(pkt, (ssize_t)rdlen); -} - -/** analyze rr in packet */ -static void analyze_rr(sldns_buffer* pkt, int q) -{ - uint16_t type, dclass, len; - uint32_t ttl; - analyze_dname(pkt); - type = sldns_buffer_read_u16(pkt); - dclass = sldns_buffer_read_u16(pkt); - printf("type %s(%d)", sldns_rr_descript(type)? - sldns_rr_descript(type)->_name: "??" , (int)type); - printf(" class %s(%d) ", sldns_lookup_by_id(sldns_rr_classes, - (int)dclass)?sldns_lookup_by_id(sldns_rr_classes, - (int)dclass)->name:"??", (int)dclass); - if(q) { - printf("\n"); - } else { - ttl = sldns_buffer_read_u32(pkt); - printf(" ttl %d (0x%x)", (int)ttl, (unsigned)ttl); - len = sldns_buffer_read_u16(pkt); - printf(" rdata len %d:\n", (int)len); - if(sldns_rr_descript(type)) - analyze_rdata(pkt, sldns_rr_descript(type), len); - else sldns_buffer_skip(pkt, (ssize_t)len); - } -} - -/** analyse pkt */ -static void analyze(sldns_buffer* pkt) -{ - uint16_t i, f, qd, an, ns, ar; - int rrnum = 0; - printf("packet length %d\n", (int)sldns_buffer_limit(pkt)); - if(sldns_buffer_limit(pkt) < 12) return; - - i = sldns_buffer_read_u16(pkt); - printf("id (hostorder): %d (0x%x)\n", (int)i, (unsigned)i); - f = sldns_buffer_read_u16(pkt); - printf("flags: 0x%x\n", (unsigned)f); - qd = sldns_buffer_read_u16(pkt); - printf("qdcount: %d\n", (int)qd); - an = sldns_buffer_read_u16(pkt); - printf("ancount: %d\n", (int)an); - ns = sldns_buffer_read_u16(pkt); - printf("nscount: %d\n", (int)ns); - ar = sldns_buffer_read_u16(pkt); - printf("arcount: %d\n", (int)ar); - - printf(";-- query section\n"); - while(sldns_buffer_remaining(pkt) > 0) { - if(rrnum == (int)qd) - printf(";-- answer section\n"); - if(rrnum == (int)qd+(int)an) - printf(";-- authority section\n"); - if(rrnum == (int)qd+(int)an+(int)ns) - printf(";-- additional section\n"); - printf("rr %d ", rrnum); - analyze_rr(pkt, rrnum < (int)qd); - rrnum++; - } -} - -/** main program for pktview */ -int main(int argc, char* argv[]) -{ - sldns_buffer* pkt = sldns_buffer_new(65553); - if(argc != 1) { - usage(argv); - } - if(!pkt) fatal_exit("out of memory"); - - read_input(pkt, stdin); - analyze(pkt); - - sldns_buffer_free(pkt); - return 0; -} |