* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
-#define NETDISSECT_REWORKED
+/* \summary: IPv6 Internet Control Message Protocol (ICMPv6) printer */
+
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
-#ifdef INET6
-
-#include <tcpdump-stdinc.h>
+#include <netdissect-stdinc.h>
#include <stdio.h>
#include <string.h>
-#include "interface.h"
+#include "netdissect.h"
#include "addrtoname.h"
+#include "addrtostr.h"
#include "extract.h"
#include "ip6.h"
#define ND_OPT_DNSSL 31
struct nd_opt_prefix_info { /* prefix information */
- uint8_t nd_opt_pi_type;
- uint8_t nd_opt_pi_len;
- uint8_t nd_opt_pi_prefix_len;
- uint8_t nd_opt_pi_flags_reserved;
- uint8_t nd_opt_pi_valid_time[4];
- uint8_t nd_opt_pi_preferred_time[4];
- uint8_t nd_opt_pi_reserved2[4];
+ nd_uint8_t nd_opt_pi_type;
+ nd_uint8_t nd_opt_pi_len;
+ nd_uint8_t nd_opt_pi_prefix_len;
+ nd_uint8_t nd_opt_pi_flags_reserved;
+ nd_uint32_t nd_opt_pi_valid_time;
+ nd_uint32_t nd_opt_pi_preferred_time;
+ nd_uint32_t nd_opt_pi_reserved2;
struct in6_addr nd_opt_pi_prefix;
};
}
}
-static int icmp6_cksum(const struct ip6_hdr *ip6, const struct icmp6_hdr *icp,
- u_int len)
+static int icmp6_cksum(netdissect_options *ndo, const struct ip6_hdr *ip6,
+ const struct icmp6_hdr *icp, u_int len)
{
- return nextproto6_cksum(ip6, (const uint8_t *)(void *)icp, len, len,
+ return nextproto6_cksum(ndo, ip6, (const uint8_t *)(const void *)icp, len, len,
IPPROTO_ICMPV6);
}
-const struct tok rpl_mop_values[] = {
+static const struct tok rpl_mop_values[] = {
{ RPL_DIO_NONSTORING, "nonstoring"},
{ RPL_DIO_STORING, "storing"},
{ RPL_DIO_NONSTORING_MULTICAST, "nonstoring-multicast"},
{ 0, NULL},
};
-const struct tok rpl_subopt_values[] = {
+static const struct tok rpl_subopt_values[] = {
{ RPL_OPT_PAD0, "pad0"},
{ RPL_OPT_PADN, "padN"},
{ RPL_DIO_METRICS, "metrics"},
{ 0, NULL},
};
-static void
-rpl_format_dagid(char dagid_str[65], const u_char *dagid)
-{
- char *d = dagid_str;
- int i;
-
- for(i=0;i<16;i++) {
- if(isprint(dagid[i])) {
- *d++ = dagid[i];
- } else {
- snprintf(d,4,"0x%02x", dagid[i]);
- d += 4;
- }
- }
- *d++ = '\0';
-}
-
static void
rpl_dio_printopt(netdissect_options *ndo,
const struct rpl_dio_genoption *opt,
ND_TCHECK(opt->rpl_dio_len);
while((opt->rpl_dio_type == RPL_OPT_PAD0 &&
- (u_char *)opt < ndo->ndo_snapend) ||
+ (const u_char *)opt < ndo->ndo_snapend) ||
ND_TTEST2(*opt,(opt->rpl_dio_len+2))) {
unsigned int optlen = opt->rpl_dio_len+2;
ND_PRINT((ndo, " opt:pad0"));
} else {
ND_PRINT((ndo, " opt:%s len:%u ",
- tok2str(rpl_subopt_values, "%subopt:%u", opt->rpl_dio_type),
+ tok2str(rpl_subopt_values, "subopt:%u", opt->rpl_dio_type),
optlen));
if(ndo->ndo_vflag > 2) {
unsigned int paylen = opt->rpl_dio_len;
if(paylen > length) paylen = length;
hex_print(ndo,
" ",
- ((uint8_t *)opt) + RPL_DIO_GENOPTION_LEN, /* content of DIO option */
+ ((const uint8_t *)opt) + RPL_DIO_GENOPTION_LEN, /* content of DIO option */
paylen);
}
}
- opt = (struct rpl_dio_genoption *)(((char *)opt) + optlen);
+ opt = (const struct rpl_dio_genoption *)(((const char *)opt) + optlen);
length -= optlen;
}
return;
rpl_dio_print(netdissect_options *ndo,
const u_char *bp, u_int length)
{
- const struct nd_rpl_dio *dio = (struct nd_rpl_dio *)bp;
- char dagid_str[65];
+ const struct nd_rpl_dio *dio = (const struct nd_rpl_dio *)bp;
+ const char *dagid_str;
ND_TCHECK(*dio);
- rpl_format_dagid(dagid_str, dio->rpl_dagid);
+ dagid_str = ip6addr_string (ndo, dio->rpl_dagid);
ND_PRINT((ndo, " [dagid:%s,seq:%u,instance:%u,rank:%u,%smop:%s,prf:%u]",
dagid_str,
RPL_DIO_PRF(dio->rpl_mopprf)));
if(ndo->ndo_vflag > 1) {
- struct rpl_dio_genoption *opt = (struct rpl_dio_genoption *)&dio[1];
+ const struct rpl_dio_genoption *opt = (const struct rpl_dio_genoption *)&dio[1];
rpl_dio_printopt(ndo, opt, length);
}
return;
rpl_dao_print(netdissect_options *ndo,
const u_char *bp, u_int length)
{
- const struct nd_rpl_dao *dao = (struct nd_rpl_dao *)bp;
- char dagid_str[65];
+ const struct nd_rpl_dao *dao = (const struct nd_rpl_dao *)bp;
+ const char *dagid_str = "<elided>";
ND_TCHECK(*dao);
if (length < ND_RPL_DAO_MIN_LEN)
goto tooshort;
- strcpy(dagid_str,"<elided>");
bp += ND_RPL_DAO_MIN_LEN;
length -= ND_RPL_DAO_MIN_LEN;
if(RPL_DAO_D(dao->rpl_flags)) {
ND_TCHECK2(dao->rpl_dagid, DAGID_LEN);
if (length < DAGID_LEN)
goto tooshort;
- rpl_format_dagid(dagid_str, dao->rpl_dagid);
+ dagid_str = ip6addr_string (ndo, dao->rpl_dagid);
bp += DAGID_LEN;
length -= DAGID_LEN;
}
dao->rpl_flags));
if(ndo->ndo_vflag > 1) {
- const struct rpl_dio_genoption *opt = (struct rpl_dio_genoption *)bp;
+ const struct rpl_dio_genoption *opt = (const struct rpl_dio_genoption *)bp;
rpl_dio_printopt(ndo, opt, length);
}
return;
rpl_daoack_print(netdissect_options *ndo,
const u_char *bp, u_int length)
{
- const struct nd_rpl_daoack *daoack = (struct nd_rpl_daoack *)bp;
- char dagid_str[65];
+ const struct nd_rpl_daoack *daoack = (const struct nd_rpl_daoack *)bp;
+ const char *dagid_str = "<elided>";
ND_TCHECK2(*daoack, ND_RPL_DAOACK_MIN_LEN);
if (length < ND_RPL_DAOACK_MIN_LEN)
goto tooshort;
- strcpy(dagid_str,"<elided>");
bp += ND_RPL_DAOACK_MIN_LEN;
length -= ND_RPL_DAOACK_MIN_LEN;
if(RPL_DAOACK_D(daoack->rpl_flags)) {
- ND_TCHECK2(daoack->rpl_dagid, 16);
+ ND_TCHECK2(daoack->rpl_dagid, DAGID_LEN);
if (length < DAGID_LEN)
goto tooshort;
- rpl_format_dagid(dagid_str, daoack->rpl_dagid);
+ dagid_str = ip6addr_string (ndo, daoack->rpl_dagid);
bp += DAGID_LEN;
length -= DAGID_LEN;
}
/* no officially defined options for DAOACK, but print any we find */
if(ndo->ndo_vflag > 1) {
- const struct rpl_dio_genoption *opt = (struct rpl_dio_genoption *)bp;
+ const struct rpl_dio_genoption *opt = (const struct rpl_dio_genoption *)bp;
rpl_dio_printopt(ndo, opt, length);
}
return;
const u_char *ep;
u_int prot;
- dp = (struct icmp6_hdr *)bp;
- ip = (struct ip6_hdr *)bp2;
- oip = (struct ip6_hdr *)(dp + 1);
+ dp = (const struct icmp6_hdr *)bp;
+ ip = (const struct ip6_hdr *)bp2;
+ oip = (const struct ip6_hdr *)(dp + 1);
/* 'ep' points to the end of available data. */
ep = ndo->ndo_snapend;
if (ND_TTEST2(bp[0], length)) {
udp_sum = EXTRACT_16BITS(&dp->icmp6_cksum);
- sum = icmp6_cksum(ip, dp, length);
+ sum = icmp6_cksum(ndo, ip, dp, length);
if (sum != 0)
ND_PRINT((ndo,"[bad icmp6 cksum 0x%04x -> 0x%04x!] ",
udp_sum,
ip6addr_string(ndo, &oip->ip6_src)));
break;
case ICMP6_DST_UNREACH_NOPORT:
- if ((ouh = get_upperlayer(ndo, (u_char *)oip, &prot))
+ if ((ouh = get_upperlayer(ndo, (const u_char *)oip, &prot))
== NULL)
goto trunc;
case IPPROTO_TCP:
ND_PRINT((ndo,", %s tcp port %s",
ip6addr_string(ndo, &oip->ip6_dst),
- tcpport_string(dport)));
+ tcpport_string(ndo, dport)));
break;
case IPPROTO_UDP:
ND_PRINT((ndo,", %s udp port %s",
ip6addr_string(ndo, &oip->ip6_dst),
- udpport_string(dport)));
+ udpport_string(ndo, dport)));
break;
default:
ND_PRINT((ndo,", %s protocol %d port %d unreachable",
case ND_ROUTER_ADVERT:
#define RTADVLEN 16
if (ndo->ndo_vflag) {
- struct nd_router_advert *p;
+ const struct nd_router_advert *p;
- p = (struct nd_router_advert *)dp;
+ p = (const struct nd_router_advert *)dp;
ND_TCHECK(p->nd_ra_retransmit);
ND_PRINT((ndo,"\n\thop limit %u, Flags [%s]" \
", pref %s, router lifetime %us, reachable time %us, retrans time %us",
break;
case ND_NEIGHBOR_SOLICIT:
{
- struct nd_neighbor_solicit *p;
- p = (struct nd_neighbor_solicit *)dp;
+ const struct nd_neighbor_solicit *p;
+ p = (const struct nd_neighbor_solicit *)dp;
ND_TCHECK(p->nd_ns_target);
ND_PRINT((ndo,", who has %s", ip6addr_string(ndo, &p->nd_ns_target)));
if (ndo->ndo_vflag) {
break;
case ND_NEIGHBOR_ADVERT:
{
- struct nd_neighbor_advert *p;
+ const struct nd_neighbor_advert *p;
- p = (struct nd_neighbor_advert *)dp;
+ p = (const struct nd_neighbor_advert *)dp;
ND_TCHECK(p->nd_na_target);
ND_PRINT((ndo,", tgt is %s",
ip6addr_string(ndo, &p->nd_na_target)));
}
break;
case ND_REDIRECT:
-#define RDR(i) ((struct nd_redirect *)(i))
+#define RDR(i) ((const struct nd_redirect *)(i))
ND_TCHECK(RDR(dp)->nd_rd_dst);
- ND_PRINT((ndo,", %s", getname6(ndo, (const u_char *)&RDR(dp)->nd_rd_dst)));
+ ND_PRINT((ndo,", %s", ip6addr_string(ndo, &RDR(dp)->nd_rd_dst)));
ND_TCHECK(RDR(dp)->nd_rd_target);
ND_PRINT((ndo," to %s",
- getname6(ndo, (const u_char*)&RDR(dp)->nd_rd_target)));
+ ip6addr_string(ndo, &RDR(dp)->nd_rd_target)));
#define REDIRECTLEN 40
if (ndo->ndo_vflag) {
icmp6_opt_print(ndo, (const u_char *)dp + REDIRECTLEN,
break;
case ICMP6_HADISCOV_REPLY:
if (ndo->ndo_vflag) {
- struct in6_addr *in6;
- u_char *cp;
+ const struct in6_addr *in6;
+ const u_char *cp;
ND_TCHECK(dp->icmp6_data16[0]);
ND_PRINT((ndo,", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0])));
- cp = (u_char *)dp + length;
- in6 = (struct in6_addr *)(dp + 1);
- for (; (u_char *)in6 < cp; in6++) {
+ cp = (const u_char *)dp + length;
+ in6 = (const struct in6_addr *)(dp + 1);
+ for (; (const u_char *)in6 < cp; in6++) {
ND_TCHECK(*in6);
ND_PRINT((ndo,", %s", ip6addr_string(ndo, in6)));
}
get_upperlayer(netdissect_options *ndo, const u_char *bp, u_int *prot)
{
const u_char *ep;
- const struct ip6_hdr *ip6 = (struct ip6_hdr *)bp;
+ const struct ip6_hdr *ip6 = (const struct ip6_hdr *)bp;
const struct udphdr *uh;
const struct ip6_hbh *hbh;
const struct ip6_frag *fragh;
switch(nh) {
case IPPROTO_UDP:
case IPPROTO_TCP:
- uh = (struct udphdr *)bp;
+ uh = (const struct udphdr *)bp;
if (ND_TTEST(uh->uh_dport)) {
*prot = nh;
return(uh);
case IPPROTO_HOPOPTS:
case IPPROTO_DSTOPTS:
case IPPROTO_ROUTING:
- hbh = (struct ip6_hbh *)bp;
+ hbh = (const struct ip6_hbh *)bp;
if (!ND_TTEST(hbh->ip6h_len))
return(NULL);
nh = hbh->ip6h_nxt;
break;
case IPPROTO_FRAGMENT: /* this should be odd, but try anyway */
- fragh = (struct ip6_frag *)bp;
+ fragh = (const struct ip6_frag *)bp;
if (!ND_TTEST(fragh->ip6f_offlg))
return(NULL);
/* fragments with non-zero offset are meaningless */
break;
case IPPROTO_AH:
- ah = (struct ah *)bp;
+ ah = (const struct ah *)bp;
if (!ND_TTEST(ah->ah_len))
return(NULL);
nh = ah->ah_nxt;
const struct nd_opt_homeagent_info *oph;
const struct nd_opt_route_info *opri;
const u_char *cp, *ep, *domp;
- struct in6_addr in6, *in6p;
+ struct in6_addr in6;
+ const struct in6_addr *in6p;
size_t l;
u_int i;
-#define ECHECK(var) if ((u_char *)&(var) > ep - sizeof(var)) return
+#define ECHECK(var) if ((const u_char *)&(var) > ep - sizeof(var)) return
cp = bp;
/* 'ep' points to the end of available data. */
ep = ndo->ndo_snapend;
while (cp < ep) {
- op = (struct nd_opt_hdr *)cp;
+ op = (const struct nd_opt_hdr *)cp;
ECHECK(op->nd_opt_len);
if (resid <= 0)
print_lladdr(ndo, cp + 2, l);
break;
case ND_OPT_PREFIX_INFORMATION:
- opp = (struct nd_opt_prefix_info *)op;
+ opp = (const struct nd_opt_prefix_info *)op;
ND_TCHECK(opp->nd_opt_pi_prefix);
ND_PRINT((ndo,"%s/%u%s, Flags [%s], valid time %s",
ip6addr_string(ndo, &opp->nd_opt_pi_prefix),
/* xxx */
break;
case ND_OPT_MTU:
- opm = (struct nd_opt_mtu *)op;
+ opm = (const struct nd_opt_mtu *)op;
ND_TCHECK(opm->nd_opt_mtu_mtu);
ND_PRINT((ndo," %u%s",
EXTRACT_32BITS(&opm->nd_opt_mtu_mtu),
(op->nd_opt_len != 1) ? "bad option length" : "" ));
break;
case ND_OPT_RDNSS:
- oprd = (struct nd_opt_rdnss *)op;
+ oprd = (const struct nd_opt_rdnss *)op;
l = (op->nd_opt_len - 1) / 2;
ND_PRINT((ndo," lifetime %us,",
EXTRACT_32BITS(&oprd->nd_opt_rdnss_lifetime)));
}
break;
case ND_OPT_DNSSL:
- opds = (struct nd_opt_dnssl *)op;
+ opds = (const struct nd_opt_dnssl *)op;
ND_PRINT((ndo," lifetime %us, domain(s):",
EXTRACT_32BITS(&opds->nd_opt_dnssl_lifetime)));
domp = cp + 8; /* domain names, variable-sized, RFC1035-encoded */
}
break;
case ND_OPT_ADVINTERVAL:
- opa = (struct nd_opt_advinterval *)op;
+ opa = (const struct nd_opt_advinterval *)op;
ND_TCHECK(opa->nd_opt_adv_interval);
ND_PRINT((ndo," %ums", EXTRACT_32BITS(&opa->nd_opt_adv_interval)));
break;
case ND_OPT_HOMEAGENT_INFO:
- oph = (struct nd_opt_homeagent_info *)op;
+ oph = (const struct nd_opt_homeagent_info *)op;
ND_TCHECK(oph->nd_opt_hai_lifetime);
ND_PRINT((ndo," preference %u, lifetime %u",
EXTRACT_16BITS(&oph->nd_opt_hai_preference),
EXTRACT_16BITS(&oph->nd_opt_hai_lifetime)));
break;
case ND_OPT_ROUTE_INFO:
- opri = (struct nd_opt_route_info *)op;
+ opri = (const struct nd_opt_route_info *)op;
ND_TCHECK(opri->nd_opt_rti_lifetime);
memset(&in6, 0, sizeof(in6));
- in6p = (struct in6_addr *)(opri + 1);
+ in6p = (const struct in6_addr *)(opri + 1);
switch (op->nd_opt_len) {
case 1:
break;
static void
mld6_print(netdissect_options *ndo, const u_char *bp)
{
- const struct mld6_hdr *mp = (struct mld6_hdr *)bp;
+ const struct mld6_hdr *mp = (const struct mld6_hdr *)bp;
const u_char *ep;
/* 'ep' points to the end of available data. */
ep = ndo->ndo_snapend;
- if ((u_char *)mp + sizeof(*mp) > ep)
+ if ((const u_char *)mp + sizeof(*mp) > ep)
return;
ND_PRINT((ndo,"max resp delay: %d ", EXTRACT_16BITS(&mp->mld6_maxdelay)));
static void
mldv2_report_print(netdissect_options *ndo, const u_char *bp, u_int len)
{
- struct icmp6_hdr *icp = (struct icmp6_hdr *) bp;
+ const struct icmp6_hdr *icp = (const struct icmp6_hdr *) bp;
u_int group, nsrcs, ngroups;
u_int i, j;
static void
mldv2_query_print(netdissect_options *ndo, const u_char *bp, u_int len)
{
- struct icmp6_hdr *icp = (struct icmp6_hdr *) bp;
+ const struct icmp6_hdr *icp = (const struct icmp6_hdr *) bp;
u_int mrc;
int mrt, qqi;
u_int nsrcs;
if (ep < bp)
return;
- dp = (struct icmp6_hdr *)bp;
- ni6 = (struct icmp6_nodeinfo *)bp;
+ dp = (const struct icmp6_hdr *)bp;
+ ni6 = (const struct icmp6_nodeinfo *)bp;
siz = ep - bp;
switch (ni6->ni_type) {
ND_PRINT((ndo," node information query"));
ND_TCHECK2(*dp, sizeof(*ni6));
- ni6 = (struct icmp6_nodeinfo *)dp;
+ ni6 = (const struct icmp6_nodeinfo *)dp;
ND_PRINT((ndo," (")); /*)*/
switch (EXTRACT_16BITS(&ni6->ni_qtype)) {
case NI_QTYPE_NOOP:
break;
}
ND_PRINT((ndo,", subject=%s",
- getname6(ndo, (const u_char *)(ni6 + 1))));
+ ip6addr_string(ndo, ni6 + 1)));
break;
case ICMP6_NI_SUBJ_FQDN:
ND_PRINT((ndo,", subject=DNS name"));
break;
}
ND_PRINT((ndo,", subject=%s",
- getname(ndo, (const u_char *)(ni6 + 1))));
+ ipaddr_string(ndo, ni6 + 1)));
break;
default:
ND_PRINT((ndo,", unknown subject"));
needcomma = 0;
- ni6 = (struct icmp6_nodeinfo *)dp;
+ ni6 = (const struct icmp6_nodeinfo *)dp;
ND_PRINT((ndo," node information reply"));
ND_PRINT((ndo," (")); /*)*/
switch (ni6->ni_code) {
} else
dnsname_print(ndo, cp, ep);
if ((EXTRACT_16BITS(&ni6->ni_flags) & 0x01) != 0)
- ND_PRINT((ndo," [TTL=%u]", *(uint32_t *)(ni6 + 1)));
+ ND_PRINT((ndo," [TTL=%u]", EXTRACT_32BITS(ni6 + 1)));
break;
case NI_QTYPE_NODEADDR:
if (needcomma)
while (i < siz) {
if (i + sizeof(struct in6_addr) + sizeof(int32_t) > siz)
break;
- ND_PRINT((ndo," %s", getname6(ndo, bp + i)));
+ ND_PRINT((ndo," %s", ip6addr_string(ndo, bp + i)));
i += sizeof(struct in6_addr);
ND_PRINT((ndo,"(%d)", (int32_t)EXTRACT_32BITS(bp + i)));
i += sizeof(int32_t);
{
const struct icmp6_router_renum *rr6;
const char *cp;
- struct rr_pco_match *match;
- struct rr_pco_use *use;
+ const struct rr_pco_match *match;
+ const struct rr_pco_use *use;
char hbuf[NI_MAXHOST];
int n;
if (ep < bp)
return;
- rr6 = (struct icmp6_router_renum *)bp;
+ rr6 = (const struct icmp6_router_renum *)bp;
cp = (const char *)(rr6 + 1);
ND_TCHECK(rr6->rr_reserved);
}
if (rr6->rr_code == ICMP6_ROUTER_RENUMBERING_COMMAND) {
- match = (struct rr_pco_match *)cp;
+ match = (const struct rr_pco_match *)cp;
cp = (const char *)(match + 1);
ND_TCHECK(match->rpm_prefix);
ND_PRINT((ndo,",min=%u", match->rpm_minlen));
ND_PRINT((ndo,",max=%u", match->rpm_maxlen));
}
- if (inet_ntop(AF_INET6, &match->rpm_prefix, hbuf, sizeof(hbuf)))
+ if (addrtostr6(&match->rpm_prefix, hbuf, sizeof(hbuf)))
ND_PRINT((ndo,",%s/%u", hbuf, match->rpm_matchlen));
else
ND_PRINT((ndo,",?/%u", match->rpm_matchlen));
goto trunc;
n /= 4;
while (n-- > 0) {
- use = (struct rr_pco_use *)cp;
+ use = (const struct rr_pco_use *)cp;
cp = (const char *)(use + 1);
ND_TCHECK(use->rpu_prefix);
ND_PRINT((ndo,"pltime=%u,",
EXTRACT_32BITS(&use->rpu_pltime)));
}
- if (inet_ntop(AF_INET6, &use->rpu_prefix, hbuf,
- sizeof(hbuf)))
+ if (addrtostr6(&use->rpu_prefix, hbuf, sizeof(hbuf)))
ND_PRINT((ndo,"%s/%u/%u", hbuf, use->rpu_uselen,
use->rpu_keeplen));
else
ND_PRINT((ndo,"[|icmp6]"));
}
-#endif /* INET6 */
-
/*
* Local Variables:
* c-style: whitesmith
projects / tcpdump / blobdiff