diff options
Diffstat (limited to 'contrib/tcpdump/print-dccp.c')
| -rw-r--r-- | contrib/tcpdump/print-dccp.c | 526 |
1 files changed, 0 insertions, 526 deletions
diff --git a/contrib/tcpdump/print-dccp.c b/contrib/tcpdump/print-dccp.c deleted file mode 100644 index c0a5ea3a8966..000000000000 --- a/contrib/tcpdump/print-dccp.c +++ /dev/null @@ -1,526 +0,0 @@ -/* - * Copyright (C) Arnaldo Carvalho de Melo 2004 - * Copyright (C) Ian McDonald 2005 - * Copyright (C) Yoshifumi Nishida 2005 - * - * This software may be distributed either under the terms of the - * BSD-style license that accompanies tcpdump or the GNU GPL version 2 - */ - -#ifndef lint -static const char rcsid[] _U_ = - "@(#) $Header: /tcpdump/master/tcpdump/print-dccp.c,v 1.1.2.2 2005/09/20 06:25:45 guy Exp $ (LBL)"; -#endif - -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - -#include <tcpdump-stdinc.h> - -#include "dccp.h" - -#include <stdio.h> -#include <string.h> - -#include "interface.h" -#include "addrtoname.h" -#include "extract.h" /* must come after interface.h */ -#include "ip.h" -#ifdef INET6 -#include "ip6.h" -#endif -#include "ipproto.h" - -static const char *dccp_reset_codes[] = { - "unspecified", - "closed", - "aborted", - "no_connection", - "packet_error", - "option_error", - "mandatory_error", - "connection_refused", - "bad_service_code", - "too_busy", - "bad_init_cookie", - "aggression_penalty", -}; - -static const char *dccp_feature_nums[] = { - "reserved", - "ccid", - "allow_short_seqno", - "sequence_window", - "ecn_incapable", - "ack_ratio", - "send_ack_vector", - "send_ndp_count", - "minimum checksum coverage", - "check data checksum", -}; - -static int dccp_cksum(const struct ip *ip, - const struct dccp_hdr *dh, u_int len) -{ - union phu { - struct phdr { - u_int32_t src; - u_int32_t dst; - u_char mbz; - u_char proto; - u_int16_t len; - } ph; - u_int16_t pa[6]; - } phu; - const u_int16_t *sp; - - /* pseudo-header.. */ - phu.ph.mbz = 0; - phu.ph.len = htons(len); - phu.ph.proto = IPPROTO_DCCP; - memcpy(&phu.ph.src, &ip->ip_src.s_addr, sizeof(u_int32_t)); - if (IP_HL(ip) == 5) - memcpy(&phu.ph.dst, &ip->ip_dst.s_addr, sizeof(u_int32_t)); - else - phu.ph.dst = ip_finddst(ip); - - sp = &phu.pa[0]; - return in_cksum((u_short *)dh, len, sp[0]+sp[1]+sp[2]+sp[3]+sp[4]+sp[5]); -} - -#ifdef INET6 -static int dccp6_cksum(const struct ip6_hdr *ip6, const struct dccp_hdr *dh, u_int len) -{ - size_t i; - const u_int16_t *sp; - u_int32_t sum; - union { - struct { - struct in6_addr ph_src; - struct in6_addr ph_dst; - u_int32_t ph_len; - u_int8_t ph_zero[3]; - u_int8_t ph_nxt; - } ph; - u_int16_t pa[20]; - } phu; - - /* pseudo-header */ - memset(&phu, 0, sizeof(phu)); - phu.ph.ph_src = ip6->ip6_src; - phu.ph.ph_dst = ip6->ip6_dst; - phu.ph.ph_len = htonl(len); - phu.ph.ph_nxt = IPPROTO_DCCP; - - sum = 0; - for (i = 0; i < sizeof(phu.pa) / sizeof(phu.pa[0]); i++) - sum += phu.pa[i]; - - sp = (const u_int16_t *)dh; - - for (i = 0; i < (len & ~1); i += 2) - sum += *sp++; - - if (len & 1) - sum += htons((*(const u_int8_t *)sp) << 8); - - while (sum > 0xffff) - sum = (sum & 0xffff) + (sum >> 16); - sum = ~sum & 0xffff; - - return (sum); -} -#endif - -static const char *dccp_reset_code(u_int8_t code) -{ - if (code >= __DCCP_RESET_CODE_LAST) - return "invalid"; - return dccp_reset_codes[code]; -} - -static u_int64_t dccp_seqno(const struct dccp_hdr *dh) -{ - u_int32_t seq_high = DCCPH_SEQ(dh); - u_int64_t seqno = EXTRACT_24BITS(&seq_high) & 0xFFFFFF; - - if (DCCPH_X(dh) != 0) { - const struct dccp_hdr_ext *dhx = (void *)dh + sizeof(*dh); - u_int32_t seq_low = dhx->dccph_seq_low; - seqno &= 0x00FFFF; /* clear reserved field */ - seqno = (seqno << 32) + EXTRACT_32BITS(&seq_low); - } - - return seqno; -} - -static u_int64_t dccp_ack_no(const struct dccp_hdr *dh, - const struct dccp_hdr_ack_bits *dh_ack) -{ - u_int32_t ack_high = DCCPH_ACK(dh_ack); - u_int64_t ackno = EXTRACT_24BITS(&ack_high) & 0xFFFFFF; - - if (DCCPH_X(dh) != 0) { - u_int32_t ack_low = dh_ack->dccph_ack_nr_low; - - ackno &= 0x00FFFF; /* clear reserved field */ - ackno = (ackno << 32) + EXTRACT_32BITS(&ack_low); - } - - return ackno; -} - -static inline unsigned int dccp_basic_hdr_len(const struct dccp_hdr *dh) -{ - return sizeof(*dh) + (DCCPH_X(dh) ? sizeof(struct dccp_hdr_ext) : 0); -} - -static inline unsigned int dccp_packet_hdr_len(const u_int8_t type) -{ - if (type == DCCP_PKT_DATA) - return 0; - if (type == DCCP_PKT_DATAACK || - type == DCCP_PKT_ACK || - type == DCCP_PKT_SYNC || - type == DCCP_PKT_SYNCACK || - type == DCCP_PKT_CLOSE || - type == DCCP_PKT_CLOSEREQ) - return sizeof(struct dccp_hdr_ack_bits); - if (type == DCCP_PKT_REQUEST) - return sizeof(struct dccp_hdr_request); - if (type == DCCP_PKT_RESPONSE) - return sizeof(struct dccp_hdr_response); - return sizeof(struct dccp_hdr_reset); -} - -static int dccp_print_option(const u_char *option); - -/** - * dccp_print - show dccp packet - * @bp - beginning of dccp packet - * @data2 - beginning of enclosing - * @len - lenght of ip packet - */ -void dccp_print(const u_char *bp, const u_char *data2, u_int len) -{ - const struct dccp_hdr *dh; - const struct ip *ip; -#ifdef INET6 - const struct ip6_hdr *ip6; -#endif - const u_char *cp; - u_short sport, dport; - u_int hlen; - u_int extlen = 0; - - dh = (const struct dccp_hdr *)bp; - - ip = (struct ip *)data2; -#ifdef INET6 - if (IP_V(ip) == 6) - ip6 = (const struct ip6_hdr *)data2; - else - ip6 = NULL; -#endif /*INET6*/ - cp = (const u_char *)(dh + 1); - if (cp > snapend) { - printf("[Invalid packet|dccp]"); - return; - } - - if (len < sizeof(struct dccp_hdr)) { - printf("truncated-dccp - %ld bytes missing!", - (long)len - sizeof(struct dccp_hdr)); - return; - } - - sport = EXTRACT_16BITS(&dh->dccph_sport); - dport = EXTRACT_16BITS(&dh->dccph_dport); - hlen = dh->dccph_doff * 4; - -#ifdef INET6 - if (ip6) { - (void)printf("%s.%d > %s.%d: ", - ip6addr_string(&ip6->ip6_src), sport, - ip6addr_string(&ip6->ip6_dst), dport); - } else -#endif /*INET6*/ - { - (void)printf("%s.%d > %s.%d: ", - ipaddr_string(&ip->ip_src), sport, - ipaddr_string(&ip->ip_dst), dport); - } - fflush(stdout); - - if (qflag) { - (void)printf(" %d", len - hlen); - if (hlen > len) { - (void)printf("dccp [bad hdr length %u - too long, > %u]", - hlen, len); - } - return; - } - - /* other variables in generic header */ - if (vflag) { - (void)printf("CCVal %d, CsCov %d, ", DCCPH_CCVAL(dh), DCCPH_CSCOV(dh)); - } - - /* checksum calculation */ -#ifdef INET6 - if (ip6) { - if (ip6->ip6_plen && vflag) { - u_int16_t sum, dccp_sum; - - sum = dccp6_cksum(ip6, dh, len); - dccp_sum = EXTRACT_16BITS(&dh->dccph_checksum); - printf("cksum 0x%04x", dccp_sum); - if (sum != 0) { - (void)printf(" (incorrect (-> 0x%04x), ",in_cksum_shouldbe(dccp_sum, sum)); - } else - (void)printf(" (correct), "); - } - } else -#endif /* INET6 */ - if (vflag) - { - u_int16_t sum, dccp_sum; - - sum = dccp_cksum(ip, dh, len); - dccp_sum = EXTRACT_16BITS(&dh->dccph_checksum); - printf("cksum 0x%04x", dccp_sum); - if (sum != 0) { - (void)printf(" (incorrect (-> 0x%04x), ",in_cksum_shouldbe(dccp_sum, sum)); - } else - (void)printf(" (correct), "); - } - - switch (DCCPH_TYPE(dh)) { - case DCCP_PKT_REQUEST: { - struct dccp_hdr_request *dhr = - (struct dccp_hdr_request *)(bp + dccp_basic_hdr_len(dh)); - TCHECK(*dhr); - (void)printf("request (service=%d) ", dhr->dccph_req_service); - extlen += 4; - break; - } - case DCCP_PKT_RESPONSE: { - struct dccp_hdr_response *dhr = - (struct dccp_hdr_response *)(bp + dccp_basic_hdr_len(dh)); - TCHECK(*dhr); - (void)printf("response (service=%d, ack=%" PRIu64 ") ", - dhr->dccph_resp_service, - dccp_ack_no(dh,&(dhr->dccph_resp_ack))); - extlen += 12; - break; - } - case DCCP_PKT_DATA: - (void)printf("data "); - break; - case DCCP_PKT_ACK: { - struct dccp_hdr_ack_bits *dha = - (struct dccp_hdr_ack_bits *)(bp + dccp_basic_hdr_len(dh)); - TCHECK(*dha); - (void)printf("ack (ack=%" PRIu64 ") ", - dccp_ack_no(dh,dha)); - extlen += 8; - break; - } - case DCCP_PKT_DATAACK: { - struct dccp_hdr_ack_bits *dha = - (struct dccp_hdr_ack_bits *)(bp + dccp_basic_hdr_len(dh)); - TCHECK(*dha); - (void)printf("dataack (ack=%" PRIu64 ") ", - dccp_ack_no(dh,dha)); - extlen += 8; - break; - } - case DCCP_PKT_CLOSEREQ: - (void)printf("closereq "); - extlen += 8; - break; - case DCCP_PKT_CLOSE: - (void)printf("close "); - extlen += 8; - break; - case DCCP_PKT_RESET: { - struct dccp_hdr_reset *dhr = - (struct dccp_hdr_reset *)(bp + dccp_basic_hdr_len(dh)); - TCHECK(*dhr); - (void)printf("reset (code=%s) ", - dccp_reset_code(dhr->dccph_reset_code)); - extlen += 12; - break; - } - case DCCP_PKT_SYNC: - (void)printf("sync "); - extlen += 8; - break; - case DCCP_PKT_SYNCACK: - (void)printf("syncack "); - extlen += 8; - break; - default: - (void)printf("invalid "); - break; - } - - if (vflag < 2) - return; - - (void)printf("seq %" PRIu64, dccp_seqno(dh)); - - /* process options */ - if (hlen > dccp_basic_hdr_len(dh) + extlen){ - const u_char *cp; - u_int optlen; - cp = bp + dccp_basic_hdr_len(dh) + extlen; - printf(" <"); - - hlen -= dccp_basic_hdr_len(dh) + extlen; - while(1){ - TCHECK(*cp); - optlen = dccp_print_option(cp); - if (!optlen) goto trunc2; - if (hlen <= optlen) break; - hlen -= optlen; - cp += optlen; - printf(", "); - } - printf(">"); - } - return; -trunc: - printf("[|dccp]"); -trunc2: - return; -} - -static int dccp_print_option(const u_char *option) -{ - u_int8_t optlen, i; - u_int32_t *ts; - u_int16_t *var16; - u_int32_t *var32; - - TCHECK(*option); - - if (*option >= 32) { - TCHECK(*(option+1)); - optlen = *(option +1); - if (optlen < 2) { - printf("Option %d optlen too short",*option); - return 1; - } - } else optlen = 1; - - TCHECK2(*option,optlen); - - switch (*option){ - case 0: - printf("nop"); - break; - case 1: - printf("mandatory"); - break; - case 2: - printf("slowreceiver"); - break; - case 32: - printf("change_l"); - if (*(option +2) < 10){ - printf(" %s", dccp_feature_nums[*(option +2)]); - for (i = 0; i < optlen -3; i ++) printf(" %d", *(option +3 + i)); - } - break; - case 33: - printf("confirm_l"); - if (*(option +2) < 10){ - printf(" %s", dccp_feature_nums[*(option +2)]); - for (i = 0; i < optlen -3; i ++) printf(" %d", *(option +3 + i)); - } - break; - case 34: - printf("change_r"); - if (*(option +2) < 10){ - printf(" %s", dccp_feature_nums[*(option +2)]); - for (i = 0; i < optlen -3; i ++) printf(" %d", *(option +3 + i)); - } - break; - case 35: - printf("confirm_r"); - if (*(option +2) < 10){ - printf(" %s", dccp_feature_nums[*(option +2)]); - for (i = 0; i < optlen -3; i ++) printf(" %d", *(option +3 + i)); - } - break; - case 36: - printf("initcookie 0x"); - for (i = 0; i < optlen -2; i ++) printf("%02x", *(option +2 + i)); - break; - case 37: - printf("ndp_count"); - for (i = 0; i < optlen -2; i ++) printf(" %d", *(option +2 + i)); - break; - case 38: - printf("ack_vector0 0x"); - for (i = 0; i < optlen -2; i ++) printf("%02x", *(option +2 + i)); - break; - case 39: - printf("ack_vector1 0x"); - for (i = 0; i < optlen -2; i ++) printf("%02x", *(option +2 + i)); - break; - case 40: - printf("data_dropped 0x"); - for (i = 0; i < optlen -2; i ++) printf("%02x", *(option +2 + i)); - break; - case 41: - ts = (u_int32_t *)(option + 2); - printf("timestamp %u", (u_int32_t)ntohl(*ts)); - break; - case 42: - ts = (u_int32_t *)(option + 2); - printf("timestamp_echo %u", (u_int32_t)ntohl(*ts)); - break; - case 43: - printf("elapsed_time "); - if (optlen == 6){ - ts = (u_int32_t *)(option + 2); - printf("%u", (u_int32_t)ntohl(*ts)); - } else { - var16 = (u_int16_t *)(option + 2); - printf("%u", ntohs(*var16)); - } - break; - case 44: - printf("data_checksum "); - for (i = 0; i < optlen -2; i ++) printf("%02x", *(option +2 + i)); - break; - default : - if (*option >= 128) { - printf("CCID option %d",*option); - switch (optlen) { - case 4: - var16 = (u_int16_t *)(option + 2); - printf(" %u",ntohs(*var16)); - break; - case 6: - var32 = (u_int32_t *)(option + 2); - printf(" %u",(u_int32_t)ntohl(*var32)); - break; - default: - break; - } - break; - } - - printf("unknown_opt %d", *option); - break; - } - - return optlen; -trunc: - printf("[|dccp]"); - return 0; -} |