#ifndef lint
static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-icmp6.c,v 1.50 2001-06-01 03:32:28 itojun Exp $";
+ "@(#) $Header: /tcpdump/master/tcpdump/print-icmp6.c,v 1.51 2001-06-01 03:49:02 itojun Exp $";
#endif
#ifdef HAVE_CONFIG_H
#include "udp.h"
#include "ah.h"
+static const char *get_rtpref(u_int);
+static const char *get_lifetime(u_int32_t);
void icmp6_opt_print(const u_char *, int);
void mld6_print(const u_char *);
static struct udphdr *get_upperlayer(u_char *, int *);
#define abs(a) ((0 < (a)) ? (a) : -(a))
#endif
-static char *rtpref_str[] = {
- "medium", /* 00 */
- "high", /* 01 */
- "rsv", /* 10 */
- "low" /* 11 */
-};
+#ifndef ND_RA_FLAG_RTPREF_MASK
+#define ND_RA_FLAG_RTPREF_MASK 0x18
+#endif
+
+static const char *
+get_rtpref(u_int v)
+{
+ static const char *rtpref_str[] = {
+ "medium", /* 00 */
+ "high", /* 01 */
+ "rsv", /* 10 */
+ "low" /* 11 */
+ };
+
+ return rtpref_str[((v & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff];
+}
+
+static const char *
+get_lifetime(u_int32_t v)
+{
+ static char buf[20];
+
+ if (v == (u_int32_t)~0UL)
+ return "infinity";
+ else {
+ snprintf(buf, sizeof(buf), "%u", v);
+ return buf;
+ }
+}
void
icmp6_print(const u_char *bp, const u_char *bp2)
printf("icmp6: router advertisement");
if (vflag) {
struct nd_router_advert *p;
- int rtpref;
p = (struct nd_router_advert *)dp;
TCHECK(p->nd_ra_retransmit);
#endif
if (p->nd_ra_flags_reserved & ND_RA_FLAG_HA)
printf("H");
-#ifndef ND_RA_FLAG_RTPREF_MASK
-#define ND_RA_FLAG_RTPREF_MASK 0x18
-#endif
if ((p->nd_ra_flags_reserved & ~ND_RA_FLAG_RTPREF_MASK)
!= 0)
printf(" ");
- rtpref = ((p->nd_ra_flags_reserved & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff;
- printf("pref=%s, ", rtpref_str[rtpref]);
+ printf("pref=%s, ",
+ get_rtpref(p->nd_ra_flags_reserved));
printf("router_ltime=%d, ", ntohs(p->nd_ra_router_lifetime));
printf("reachable_time=%u, ",
const struct nd_opt_mtu *opm;
const struct nd_opt_advinterval *opa;
const struct nd_opt_route_info *opri;
- const u_char *ep;
+ const u_char *cp, *ep;
int opts_len;
struct in6_addr in6, *in6p;
- u_int32_t lifetime;
-#if 0
- const struct ip6_hdr *ip;
- const char *str;
- const struct ip6_hdr *oip;
- const struct udphdr *ouh;
- int hlen, dport;
- char buf[256];
-#endif
#define ECHECK(var) if ((u_char *)&(var) > ep - sizeof(var)) return
- op = (struct nd_opt_hdr *)bp;
-#if 0
- ip = (struct ip6_hdr *)bp2;
- oip = &dp->icmp6_ip6;
- str = buf;
-#endif
+ cp = bp;
/* 'ep' points to the end of available data. */
ep = snapend;
- ECHECK(op->nd_opt_len);
- if (resid <= 0)
- return;
- switch (op->nd_opt_type) {
- case ND_OPT_SOURCE_LINKADDR:
- opl = (struct nd_opt_hdr *)op;
-#if 1
- if ((u_char *)opl + (opl->nd_opt_len << 3) > ep)
+ while (cp < ep) {
+ op = (struct nd_opt_hdr *)cp;
+
+ ECHECK(op->nd_opt_len);
+ if (resid <= 0)
+ return;
+ if (op->nd_opt_len == 0)
goto trunc;
-#else
- TCHECK((u_char *)opl + (opl->nd_opt_len << 3) - 1);
-#endif
- printf("(src lladdr: %s", /*)*/
- etheraddr_string((u_char *)(opl + 1)));
- if (opl->nd_opt_len != 1)
- printf("!");
- /*(*/
- printf(")");
- icmp6_opt_print((const u_char *)op + (op->nd_opt_len << 3),
- resid - (op->nd_opt_len << 3));
- break;
- case ND_OPT_TARGET_LINKADDR:
- opl = (struct nd_opt_hdr *)op;
-#if 1
- if ((u_char *)opl + (opl->nd_opt_len << 3) > ep)
+ if (cp + (op->nd_opt_len << 3) > ep)
goto trunc;
-#else
- TCHECK((u_char *)opl + (opl->nd_opt_len << 3) - 1);
-#endif
- printf("(tgt lladdr: %s", /*)*/
- etheraddr_string((u_char *)(opl + 1)));
- if (opl->nd_opt_len != 1)
- printf("!");
- /*(*/
- printf(")");
- icmp6_opt_print((const u_char *)op + (op->nd_opt_len << 3),
- resid - (op->nd_opt_len << 3));
- break;
- case ND_OPT_PREFIX_INFORMATION:
- opp = (struct nd_opt_prefix_info *)op;
- TCHECK(opp->nd_opt_pi_prefix);
- printf("(prefix info: "); /*)*/
- if (opp->nd_opt_pi_flags_reserved & ND_OPT_PI_FLAG_ONLINK)
- printf("L");
- if (opp->nd_opt_pi_flags_reserved & ND_OPT_PI_FLAG_AUTO)
- printf("A");
- if (opp->nd_opt_pi_flags_reserved & ND_OPT_PI_FLAG_ROUTER)
- printf("R");
- if (opp->nd_opt_pi_flags_reserved)
- printf(" ");
- printf("valid_ltime=");
- if ((u_int32_t)ntohl(opp->nd_opt_pi_valid_time) == ~0U)
- printf("infinity");
- else {
- printf("%u", (u_int32_t)ntohl(opp->nd_opt_pi_valid_time));
- }
- printf(", ");
- printf("preferred_ltime=");
- if ((u_int32_t)ntohl(opp->nd_opt_pi_preferred_time) == ~0U)
- printf("infinity");
- else {
- printf("%u", (u_int32_t)ntohl(opp->nd_opt_pi_preferred_time));
- }
- printf(", ");
- printf("prefix=%s/%d", ip6addr_string(&opp->nd_opt_pi_prefix),
- opp->nd_opt_pi_prefix_len);
- if (opp->nd_opt_pi_len != 4)
- printf("!");
- /*(*/
- printf(")");
- icmp6_opt_print((const u_char *)op + (op->nd_opt_len << 3),
- resid - (op->nd_opt_len << 3));
- break;
- case ND_OPT_REDIRECTED_HEADER:
- opr = (struct icmp6_opts_redirect *)op;
- printf("(redirect)");
- /* xxx */
- icmp6_opt_print((const u_char *)op + (op->nd_opt_len << 3),
- resid - (op->nd_opt_len << 3));
- break;
- case ND_OPT_MTU:
- opm = (struct nd_opt_mtu *)op;
- TCHECK(opm->nd_opt_mtu_mtu);
- printf("(mtu:"); /*)*/
- printf(" mtu=%u", (u_int32_t)ntohl(opm->nd_opt_mtu_mtu));
- if (opm->nd_opt_mtu_len != 1)
- printf("!");
- printf(")");
- icmp6_opt_print((const u_char *)op + (op->nd_opt_len << 3),
- resid - (op->nd_opt_len << 3));
- break;
- case ND_OPT_ADVINTERVAL:
- opa = (struct nd_opt_advinterval *)op;
- TCHECK(opa->nd_opt_adv_interval);
- printf("(advint:"); /*)*/
- printf(" advint=%u",
- (u_int32_t)ntohl(opa->nd_opt_adv_interval));
- /*(*/
- printf(")");
- icmp6_opt_print((const u_char *)op + (op->nd_opt_len << 3),
- resid - (op->nd_opt_len << 3));
- break;
- case ND_OPT_ROUTE_INFO:
- opri = (struct nd_opt_route_info *)op;
- TCHECK(opri->nd_opt_rti_lifetime);
- memset(&in6, 0, sizeof(in6));
- in6p = (struct in6_addr *)(opri + 1);
- switch (op->nd_opt_len) {
- case 1:
+
+ switch (op->nd_opt_type) {
+ case ND_OPT_SOURCE_LINKADDR:
+ opl = (struct nd_opt_hdr *)op;
+ printf("(src lladdr: %s", /*)*/
+ etheraddr_string((u_char *)(opl + 1)));
+ if (opl->nd_opt_len != 1)
+ printf("!");
+ /*(*/
+ printf(")");
+ break;
+ case ND_OPT_TARGET_LINKADDR:
+ opl = (struct nd_opt_hdr *)op;
+ printf("(tgt lladdr: %s", /*)*/
+ etheraddr_string((u_char *)(opl + 1)));
+ if (opl->nd_opt_len != 1)
+ printf("!");
+ /*(*/
+ printf(")");
+ break;
+ case ND_OPT_PREFIX_INFORMATION:
+ opp = (struct nd_opt_prefix_info *)op;
+ TCHECK(opp->nd_opt_pi_prefix);
+ printf("(prefix info: "); /*)*/
+ if (opp->nd_opt_pi_flags_reserved & ND_OPT_PI_FLAG_ONLINK)
+ printf("L");
+ if (opp->nd_opt_pi_flags_reserved & ND_OPT_PI_FLAG_AUTO)
+ printf("A");
+ if (opp->nd_opt_pi_flags_reserved & ND_OPT_PI_FLAG_ROUTER)
+ printf("R");
+ if (opp->nd_opt_pi_flags_reserved)
+ printf(" ");
+ printf("valid_ltime=%s,",
+ get_lifetime((u_int32_t)ntohl(opp->nd_opt_pi_valid_time)));
+ printf("preferred_ltime=%s,",
+ get_lifetime((u_int32_t)ntohl(opp->nd_opt_pi_preferred_time)));
+ printf("prefix=%s/%d", ip6addr_string(&opp->nd_opt_pi_prefix),
+ opp->nd_opt_pi_prefix_len);
+ if (opp->nd_opt_pi_len != 4)
+ printf("!");
+ /*(*/
+ printf(")");
break;
- case 2:
- TCHECK2(*in6p, 8);
- memcpy(&in6, opri + 1, 8);
+ case ND_OPT_REDIRECTED_HEADER:
+ opr = (struct icmp6_opts_redirect *)op;
+ printf("(redirect)");
+ /* xxx */
+ break;
+ case ND_OPT_MTU:
+ opm = (struct nd_opt_mtu *)op;
+ TCHECK(opm->nd_opt_mtu_mtu);
+ printf("(mtu:"); /*)*/
+ printf(" mtu=%u", (u_int32_t)ntohl(opm->nd_opt_mtu_mtu));
+ if (opm->nd_opt_mtu_len != 1)
+ printf("!");
+ printf(")");
break;
- case 3:
- TCHECK(*in6p);
- memcpy(&in6, opri + 1, sizeof(in6));
+ case ND_OPT_ADVINTERVAL:
+ opa = (struct nd_opt_advinterval *)op;
+ TCHECK(opa->nd_opt_adv_interval);
+ printf("(advint:"); /*)*/
+ printf(" advint=%u",
+ (u_int32_t)ntohl(opa->nd_opt_adv_interval));
+ /*(*/
+ printf(")");
+ break;
+ case ND_OPT_ROUTE_INFO:
+ opri = (struct nd_opt_route_info *)op;
+ TCHECK(opri->nd_opt_rti_lifetime);
+ memset(&in6, 0, sizeof(in6));
+ in6p = (struct in6_addr *)(opri + 1);
+ switch (op->nd_opt_len) {
+ case 1:
+ break;
+ case 2:
+ TCHECK2(*in6p, 8);
+ memcpy(&in6, opri + 1, 8);
+ break;
+ case 3:
+ TCHECK(*in6p);
+ memcpy(&in6, opri + 1, sizeof(in6));
+ break;
+ default:
+ goto trunc;
+ }
+ printf("(rtinfo:"); /*)*/
+ printf(" %s/%u", ip6addr_string(&in6),
+ opri->nd_opt_rti_prefixlen);
+ printf(", pref=%s", get_rtpref(opri->nd_opt_rti_flags));
+ printf(", lifetime=%s",
+ get_lifetime((u_int32_t)ntohl(opri->nd_opt_rti_lifetime)));
+ /*(*/
+ printf(")");
break;
default:
- goto trunc;
+ opts_len = op->nd_opt_len;
+ printf("(unknwon opt_type=%d, opt_len=%d)",
+ op->nd_opt_type, opts_len);
+ if (opts_len == 0)
+ opts_len = 1; /* XXX */
+ break;
}
- printf("(rtinfo:"); /*)*/
- printf(" %s/%u", ip6addr_string(&in6),
- opri->nd_opt_rti_prefixlen);
- printf(", pref=%s",
- rtpref_str[((opri->nd_opt_rti_flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff]);
- printf(", lifetime=");
- lifetime = (u_int32_t)ntohl(opri->nd_opt_rti_lifetime);
- if (lifetime == ~0UL)
- printf("infinity");
- else
- printf("%u", lifetime);
- /*(*/
- printf(")");
- icmp6_opt_print((const u_char *)op + (op->nd_opt_len << 3),
- resid - (op->nd_opt_len << 3));
- break;
- default:
- opts_len = op->nd_opt_len;
- printf("(unknwon opt_type=%d, opt_len=%d)",
- op->nd_opt_type, opts_len);
- if (opts_len == 0)
- opts_len = 1; /* XXX */
- icmp6_opt_print((const u_char *)op + (opts_len << 3),
- resid - (opts_len << 3));
- break;
+
+ cp += op->nd_opt_len << 3;
+ resid -= op->nd_opt_len << 3;
}
return;
+
trunc:
fputs("[ndp opt]", stdout);
return;
projects / tcpdump / blobdiff