* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
+/* \summary: IP printer */
+
#ifdef HAVE_CONFIG_H
-#include "config.h"
+#include <config.h>
#endif
-#include <tcpdump-stdinc.h>
+#include "netdissect-stdinc.h"
-#include <stdio.h>
-#include <stdlib.h>
#include <string.h>
+#include "netdissect.h"
#include "addrtoname.h"
-#include "interface.h"
-#include "extract.h" /* must come after interface.h */
+#include "extract.h"
#include "ip.h"
#include "ipproto.h"
-static const char tstr[] = "[|ip]";
static const struct tok ip_option_values[] = {
{ IPOPT_EOL, "EOL" },
/*
* print the recorded route in an IP RR, LSRR or SSRR option.
*/
-static void
-ip_printroute(register const u_char *cp, u_int length)
+static int
+ip_printroute(netdissect_options *ndo,
+ const u_char *cp, u_int length)
{
- register u_int ptr;
- register u_int len;
+ u_int ptr;
+ u_int len;
if (length < 3) {
- printf(" [bad length %u]", length);
- return;
+ ND_PRINT(" [bad length %u]", length);
+ return (0);
}
if ((length + 1) & 3)
- printf(" [bad length %u]", length);
- ptr = cp[2] - 1;
+ ND_PRINT(" [bad length %u]", length);
+ ND_TCHECK_1(cp + 2);
+ ptr = EXTRACT_U_1(cp + 2) - 1;
if (ptr < 3 || ((ptr + 1) & 3) || ptr > length + 1)
- printf(" [bad ptr %u]", cp[2]);
+ ND_PRINT(" [bad ptr %u]", EXTRACT_U_1(cp + 2));
for (len = 3; len < length; len += 4) {
- printf(" %s", ipaddr_string(&cp[len]));
- if (ptr > len)
- printf(",");
+ ND_TCHECK_4(cp + len);
+ ND_PRINT(" %s", ipaddr_string(ndo, cp + len));
+ if (ptr > len)
+ ND_PRINT(",");
}
+ return (0);
+
+trunc:
+ return (-1);
}
/*
* This is used for UDP and TCP pseudo-header in the checksum
* calculation.
*/
-static u_int32_t
-ip_finddst(const struct ip *ip)
+static uint32_t
+ip_finddst(netdissect_options *ndo,
+ const struct ip *ip)
{
- int length;
- int len;
+ u_int length;
+ u_int len;
const u_char *cp;
- u_int32_t retval;
cp = (const u_char *)(ip + 1);
- length = (IP_HL(ip) << 2) - sizeof(struct ip);
+ length = (IP_HL(ip) << 2);
+ if (length < sizeof(struct ip))
+ goto trunc;
+ length -= sizeof(struct ip);
- for (; length > 0; cp += len, length -= len) {
+ for (; length != 0; cp += len, length -= len) {
int tt;
- TCHECK(*cp);
- tt = *cp;
+ ND_TCHECK_1(cp);
+ tt = EXTRACT_U_1(cp);
if (tt == IPOPT_EOL)
break;
else if (tt == IPOPT_NOP)
len = 1;
else {
- TCHECK(cp[1]);
- len = cp[1];
+ ND_TCHECK_1(cp + 1);
+ len = EXTRACT_U_1(cp + 1);
if (len < 2)
break;
}
- TCHECK2(*cp, len);
+ if (length < len)
+ goto trunc;
+ ND_TCHECK_LEN(cp, len);
switch (tt) {
case IPOPT_SSRR:
case IPOPT_LSRR:
if (len < 7)
break;
- UNALIGNED_MEMCPY(&retval, cp + len - 4, 4);
- return retval;
+ return (EXTRACT_IPV4_TO_NETWORK_ORDER(cp + len - 4));
}
}
trunc:
- UNALIGNED_MEMCPY(&retval, &ip->ip_dst.s_addr, sizeof(u_int32_t));
- return retval;
+ return (EXTRACT_IPV4_TO_NETWORK_ORDER(ip->ip_dst));
}
/*
* Compute a V4-style checksum by building a pseudoheader.
*/
int
-nextproto4_cksum(const struct ip *ip, const u_int8_t *data,
- u_int len, u_int covlen, u_int next_proto)
+nextproto4_cksum(netdissect_options *ndo,
+ const struct ip *ip, const uint8_t *data,
+ u_int len, u_int covlen, u_int next_proto)
{
struct phdr {
- u_int32_t src;
- u_int32_t dst;
+ uint32_t src;
+ uint32_t dst;
u_char mbz;
u_char proto;
- u_int16_t len;
+ uint16_t len;
} ph;
struct cksum_vec vec[2];
/* pseudo-header.. */
- ph.len = htons((u_int16_t)len);
+ ph.len = htons((uint16_t)len);
ph.mbz = 0;
ph.proto = next_proto;
- UNALIGNED_MEMCPY(&ph.src, &ip->ip_src.s_addr, sizeof(u_int32_t));
+ ph.src = EXTRACT_IPV4_TO_NETWORK_ORDER(ip->ip_src);
if (IP_HL(ip) == 5)
- UNALIGNED_MEMCPY(&ph.dst, &ip->ip_dst.s_addr, sizeof(u_int32_t));
+ ph.dst = EXTRACT_IPV4_TO_NETWORK_ORDER(ip->ip_dst);
else
- ph.dst = ip_finddst(ip);
+ ph.dst = ip_finddst(ndo, ip);
- vec[0].ptr = (const u_int8_t *)(void *)&ph;
+ vec[0].ptr = (const uint8_t *)(void *)&ph;
vec[0].len = sizeof(ph);
vec[1].ptr = data;
vec[1].len = covlen;
return (in_cksum(vec, 2));
}
-static void
-ip_printts(register const u_char *cp, u_int length)
+static int
+ip_printts(netdissect_options *ndo,
+ const u_char *cp, u_int length)
{
- register u_int ptr;
- register u_int len;
- int hoplen;
+ u_int ptr;
+ u_int len;
+ u_int hoplen;
const char *type;
if (length < 4) {
- printf("[bad length %u]", length);
- return;
+ ND_PRINT("[bad length %u]", length);
+ return (0);
}
- printf(" TS{");
- hoplen = ((cp[3]&0xF) != IPOPT_TS_TSONLY) ? 8 : 4;
+ ND_PRINT(" TS{");
+ ND_TCHECK_1(cp + 3);
+ hoplen = ((EXTRACT_U_1(cp + 3) & 0xF) != IPOPT_TS_TSONLY) ? 8 : 4;
if ((length - 4) & (hoplen-1))
- printf("[bad length %u]", length);
- ptr = cp[2] - 1;
+ ND_PRINT("[bad length %u]", length);
+ ND_TCHECK_1(cp + 2);
+ ptr = EXTRACT_U_1(cp + 2) - 1;
len = 0;
if (ptr < 4 || ((ptr - 4) & (hoplen-1)) || ptr > length + 1)
- printf("[bad ptr %u]", cp[2]);
- switch (cp[3]&0xF) {
+ ND_PRINT("[bad ptr %u]", EXTRACT_U_1(cp + 2));
+ ND_TCHECK_1(cp + 3);
+ switch (EXTRACT_U_1(cp + 3)&0xF) {
case IPOPT_TS_TSONLY:
- printf("TSONLY");
+ ND_PRINT("TSONLY");
break;
case IPOPT_TS_TSANDADDR:
- printf("TS+ADDR");
+ ND_PRINT("TS+ADDR");
break;
/*
* prespecified should really be 3, but some ones might send 2
*/
case 2:
- printf("PRESPEC2.0");
+ ND_PRINT("PRESPEC2.0");
break;
case 3: /* IPOPT_TS_PRESPEC */
- printf("PRESPEC");
+ ND_PRINT("PRESPEC");
break;
default:
- printf("[bad ts type %d]", cp[3]&0xF);
+ ND_PRINT("[bad ts type %u]", EXTRACT_U_1(cp + 3)&0xF);
goto done;
}
for (len = 4; len < length; len += hoplen) {
if (ptr == len)
type = " ^ ";
- printf("%s%d@%s", type, EXTRACT_32BITS(&cp[len+hoplen-4]),
- hoplen!=8 ? "" : ipaddr_string(&cp[len]));
+ ND_TCHECK_LEN(cp + len, hoplen);
+ ND_PRINT("%s%u@%s", type, EXTRACT_BE_U_4(cp + len + hoplen - 4),
+ hoplen!=8 ? "" : ipaddr_string(ndo, cp + len));
type = " ";
}
done:
- printf("%s", ptr == len ? " ^ " : "");
+ ND_PRINT("%s", ptr == len ? " ^ " : "");
- if (cp[3]>>4)
- printf(" [%d hops not recorded]} ", cp[3]>>4);
+ if (EXTRACT_U_1(cp + 3) >> 4)
+ ND_PRINT(" [%u hops not recorded]} ", EXTRACT_U_1(cp + 3)>>4);
else
- printf("}");
+ ND_PRINT("}");
+ return (0);
+
+trunc:
+ return (-1);
}
/*
* print IP options.
+ If truncated return -1, else 0.
*/
-static void
-ip_optprint(register const u_char *cp, u_int length)
+static int
+ip_optprint(netdissect_options *ndo,
+ const u_char *cp, u_int length)
{
- register u_int option_len;
+ u_int option_len;
const char *sep = "";
for (; length > 0; cp += option_len, length -= option_len) {
u_int option_code;
- printf("%s", sep);
+ ND_PRINT("%s", sep);
sep = ",";
- TCHECK(*cp);
- option_code = *cp;
+ ND_TCHECK_1(cp);
+ option_code = EXTRACT_U_1(cp);
- printf("%s",
- tok2str(ip_option_values,"unknown %u",option_code));
+ ND_PRINT("%s",
+ tok2str(ip_option_values,"unknown %u",option_code));
if (option_code == IPOPT_NOP ||
option_code == IPOPT_EOL)
option_len = 1;
else {
- TCHECK(cp[1]);
- option_len = cp[1];
+ ND_TCHECK_1(cp + 1);
+ option_len = EXTRACT_U_1(cp + 1);
if (option_len < 2) {
- printf(" [bad length %u]", option_len);
- return;
+ ND_PRINT(" [bad length %u]", option_len);
+ return 0;
}
}
if (option_len > length) {
- printf(" [bad length %u]", option_len);
- return;
+ ND_PRINT(" [bad length %u]", option_len);
+ return 0;
}
- TCHECK2(*cp, option_len);
+ ND_TCHECK_LEN(cp, option_len);
switch (option_code) {
case IPOPT_EOL:
- return;
+ return 0;
case IPOPT_TS:
- ip_printts(cp, option_len);
+ if (ip_printts(ndo, cp, option_len) == -1)
+ goto trunc;
break;
case IPOPT_RR: /* fall through */
case IPOPT_SSRR:
case IPOPT_LSRR:
- ip_printroute(cp, option_len);
+ if (ip_printroute(ndo, cp, option_len) == -1)
+ goto trunc;
break;
case IPOPT_RA:
if (option_len < 4) {
- printf(" [bad length %u]", option_len);
+ ND_PRINT(" [bad length %u]", option_len);
break;
}
- TCHECK(cp[3]);
- if (EXTRACT_16BITS(&cp[2]) != 0)
- printf(" value %u", EXTRACT_16BITS(&cp[2]));
+ ND_TCHECK_1(cp + 3);
+ if (EXTRACT_BE_U_2(cp + 2) != 0)
+ ND_PRINT(" value %u", EXTRACT_BE_U_2(cp + 2));
break;
case IPOPT_NOP: /* nothing to print - fall through */
break;
}
}
- return;
+ return 0;
trunc:
- printf("%s", tstr);
+ return -1;
}
#define IP_RES 0x8000
ip_print_demux(netdissect_options *ndo,
struct ip_print_demux_state *ipds)
{
- struct protoent *proto;
- struct cksum_vec vec[1];
+ const char *p_name;
again:
switch (ipds->nh) {
case IPPROTO_AH:
- ipds->nh = *ipds->cp;
- ipds->advance = ah_print(ipds->cp);
+ if (!ND_TTEST_1(ipds->cp)) {
+ ND_PRINT("[|AH]");
+ break;
+ }
+ ipds->nh = EXTRACT_U_1(ipds->cp);
+ ipds->advance = ah_print(ndo, ipds->cp);
if (ipds->advance <= 0)
break;
ipds->cp += ipds->advance;
case IPPROTO_ESP:
{
- int enh, padlen;
+ u_int enh, padlen;
ipds->advance = esp_print(ndo, ipds->cp, ipds->len,
(const u_char *)ipds->ip,
&enh, &padlen);
case IPPROTO_IPCOMP:
{
- int enh;
- ipds->advance = ipcomp_print(ipds->cp, &enh);
- if (ipds->advance <= 0)
- break;
- ipds->cp += ipds->advance;
- ipds->len -= ipds->advance;
- ipds->nh = enh & 0xff;
- goto again;
+ ipcomp_print(ndo, ipds->cp);
+ /*
+ * Either this has decompressed the payload and
+ * printed it, in which case there's nothing more
+ * to do, or it hasn't, in which case there's
+ * nothing more to do.
+ */
+ break;
}
case IPPROTO_SCTP:
- sctp_print(ipds->cp, (const u_char *)ipds->ip, ipds->len);
+ sctp_print(ndo, ipds->cp, (const u_char *)ipds->ip, ipds->len);
break;
case IPPROTO_DCCP:
- dccp_print(ipds->cp, (const u_char *)ipds->ip, ipds->len);
+ dccp_print(ndo, ipds->cp, (const u_char *)ipds->ip, ipds->len);
break;
case IPPROTO_TCP:
/* pass on the MF bit plus the offset to detect fragments */
- tcp_print(ipds->cp, ipds->len, (const u_char *)ipds->ip,
+ tcp_print(ndo, ipds->cp, ipds->len, (const u_char *)ipds->ip,
ipds->off & (IP_MF|IP_OFFMASK));
break;
case IPPROTO_UDP:
/* pass on the MF bit plus the offset to detect fragments */
- udp_print(ipds->cp, ipds->len, (const u_char *)ipds->ip,
+ udp_print(ndo, ipds->cp, ipds->len, (const u_char *)ipds->ip,
ipds->off & (IP_MF|IP_OFFMASK));
break;
case IPPROTO_ICMP:
/* pass on the MF bit plus the offset to detect fragments */
- icmp_print(ipds->cp, ipds->len, (const u_char *)ipds->ip,
+ icmp_print(ndo, ipds->cp, ipds->len, (const u_char *)ipds->ip,
ipds->off & (IP_MF|IP_OFFMASK));
break;
* match was the current protocol number
* assignments say.
*/
- igrp_print(ipds->cp, ipds->len, (const u_char *)ipds->ip);
+ igrp_print(ndo, ipds->cp, ipds->len);
break;
case IPPROTO_EIGRP:
- eigrp_print(ipds->cp, ipds->len);
+ eigrp_print(ndo, ipds->cp, ipds->len);
break;
case IPPROTO_ND:
- ND_PRINT((ndo, " nd %d", ipds->len));
+ ND_PRINT(" nd %u", ipds->len);
break;
case IPPROTO_EGP:
- egp_print(ipds->cp, ipds->len);
+ egp_print(ndo, ipds->cp, ipds->len);
break;
case IPPROTO_OSPF:
- ospf_print(ipds->cp, ipds->len, (const u_char *)ipds->ip);
+ ospf_print(ndo, ipds->cp, ipds->len, (const u_char *)ipds->ip);
break;
case IPPROTO_IGMP:
- igmp_print(ipds->cp, ipds->len);
+ igmp_print(ndo, ipds->cp, ipds->len);
break;
case IPPROTO_IPV4:
/* DVMRP multicast tunnel (ip-in-ip encapsulation) */
ip_print(ndo, ipds->cp, ipds->len);
- if (! vflag) {
- ND_PRINT((ndo, " (ipip-proto-4)"));
+ if (! ndo->ndo_vflag) {
+ ND_PRINT(" (ipip-proto-4)");
return;
}
break;
-#ifdef INET6
case IPPROTO_IPV6:
/* ip6-in-ip encapsulation */
ip6_print(ndo, ipds->cp, ipds->len);
break;
-#endif /*INET6*/
case IPPROTO_RSVP:
- rsvp_print(ipds->cp, ipds->len);
+ rsvp_print(ndo, ipds->cp, ipds->len);
break;
case IPPROTO_GRE:
/* do it */
- gre_print(ipds->cp, ipds->len);
+ gre_print(ndo, ipds->cp, ipds->len);
break;
case IPPROTO_MOBILE:
- mobile_print(ipds->cp, ipds->len);
+ mobile_print(ndo, ipds->cp, ipds->len);
break;
case IPPROTO_PIM:
- vec[0].ptr = ipds->cp;
- vec[0].len = ipds->len;
- pim_print(ipds->cp, ipds->len, in_cksum(vec, 1));
+ pim_print(ndo, ipds->cp, ipds->len, (const u_char *)ipds->ip);
break;
case IPPROTO_VRRP:
- if (packettype == PT_CARP) {
- if (vflag)
- (void)printf("carp %s > %s: ",
- ipaddr_string(&ipds->ip->ip_src),
- ipaddr_string(&ipds->ip->ip_dst));
- carp_print(ipds->cp, ipds->len, ipds->ip->ip_ttl);
+ if (ndo->ndo_packettype == PT_CARP) {
+ if (ndo->ndo_vflag)
+ ND_PRINT("carp %s > %s: ",
+ ipaddr_string(ndo, ipds->ip->ip_src),
+ ipaddr_string(ndo, ipds->ip->ip_dst));
+ carp_print(ndo, ipds->cp, ipds->len,
+ EXTRACT_U_1(ipds->ip->ip_ttl));
} else {
- if (vflag)
- (void)printf("vrrp %s > %s: ",
- ipaddr_string(&ipds->ip->ip_src),
- ipaddr_string(&ipds->ip->ip_dst));
- vrrp_print(ipds->cp, ipds->len, ipds->ip->ip_ttl);
+ if (ndo->ndo_vflag)
+ ND_PRINT("vrrp %s > %s: ",
+ ipaddr_string(ndo, ipds->ip->ip_src),
+ ipaddr_string(ndo, ipds->ip->ip_dst));
+ vrrp_print(ndo, ipds->cp, ipds->len,
+ (const u_char *)ipds->ip,
+ EXTRACT_U_1(ipds->ip->ip_ttl));
}
break;
case IPPROTO_PGM:
- pgm_print(ipds->cp, ipds->len, (const u_char *)ipds->ip);
+ pgm_print(ndo, ipds->cp, ipds->len, (const u_char *)ipds->ip);
break;
default:
- if (ndo->ndo_nflag==0 && (proto = getprotobynumber(ipds->nh)) != NULL)
- ND_PRINT((ndo, " %s", proto->p_name));
+ if (ndo->ndo_nflag==0 && (p_name = netdb_protoname(ipds->nh)) != NULL)
+ ND_PRINT(" %s", p_name);
else
- ND_PRINT((ndo, " ip-proto-%d", ipds->nh));
- ND_PRINT((ndo, " %d", ipds->len));
+ ND_PRINT(" ip-proto-%u", ipds->nh);
+ ND_PRINT(" %u", ipds->len);
break;
}
}
void
-ip_print_inner(netdissect_options *ndo,
+ip_inner_print(netdissect_options *ndo,
const u_char *bp,
u_int length, u_int nh,
const u_char *bp2)
const u_char *ipend;
u_int hlen;
struct cksum_vec vec[1];
- u_int16_t sum, ip_sum;
- struct protoent *proto;
+ uint8_t ip_tos, ip_ttl, ip_proto;
+ uint16_t sum, ip_sum;
+ const char *p_name;
+ int truncated = 0;
+ ndo->ndo_protocol = "ip";
ipds->ip = (const struct ip *)bp;
- if (IP_V(ipds->ip) != 4) { /* print version if != 4 */
- printf("IP%u ", IP_V(ipds->ip));
+ ND_TCHECK_1(ipds->ip->ip_vhl);
+ if (IP_V(ipds->ip) != 4) { /* print version and fail if != 4 */
if (IP_V(ipds->ip) == 6)
- printf(", wrong link-layer encapsulation");
+ ND_PRINT("IP6, wrong link-layer encapsulation");
+ else
+ ND_PRINT("IP%u", IP_V(ipds->ip));
+ ND_PRINT("%s", istr);
+ return;
}
- else if (!eflag)
- printf("IP ");
+ if (!ndo->ndo_eflag)
+ ND_PRINT("IP ");
- if ((u_char *)(ipds->ip + 1) > ndo->ndo_snapend) {
- printf("%s", tstr);
- return;
- }
+ ND_TCHECK_SIZE(ipds->ip);
if (length < sizeof (struct ip)) {
- (void)printf("truncated-ip %u", length);
+ ND_PRINT("truncated-ip %u", length);
return;
}
hlen = IP_HL(ipds->ip) * 4;
if (hlen < sizeof (struct ip)) {
- (void)printf("bad-hlen %u", hlen);
+ ND_PRINT("bad-hlen %u", hlen);
return;
}
- ipds->len = EXTRACT_16BITS(&ipds->ip->ip_len);
+ ipds->len = EXTRACT_BE_U_2(ipds->ip->ip_len);
if (length < ipds->len)
- (void)printf("truncated-ip - %u bytes missing! ",
+ ND_PRINT("truncated-ip - %u bytes missing! ",
ipds->len - length);
if (ipds->len < hlen) {
#ifdef GUESS_TSO
if (ipds->len) {
- (void)printf("bad-len %u", ipds->len);
+ ND_PRINT("bad-len %u", ipds->len);
return;
}
else {
ipds->len = length;
}
#else
- (void)printf("bad-len %u", ipds->len);
+ ND_PRINT("bad-len %u", ipds->len);
return;
#endif /* GUESS_TSO */
}
ipds->len -= hlen;
- ipds->off = EXTRACT_16BITS(&ipds->ip->ip_off);
+ ipds->off = EXTRACT_BE_U_2(ipds->ip->ip_off);
+
+ ip_proto = EXTRACT_U_1(ipds->ip->ip_p);
- if (vflag) {
- (void)printf("(tos 0x%x", (int)ipds->ip->ip_tos);
+ if (ndo->ndo_vflag) {
+ ip_tos = EXTRACT_U_1(ipds->ip->ip_tos);
+ ND_PRINT("(tos 0x%x", ip_tos);
/* ECN bits */
- if (ipds->ip->ip_tos & 0x03) {
- switch (ipds->ip->ip_tos & 0x03) {
- case 1:
- (void)printf(",ECT(1)");
- break;
- case 2:
- (void)printf(",ECT(0)");
- break;
- case 3:
- (void)printf(",CE");
- }
+ switch (ip_tos & 0x03) {
+
+ case 0:
+ break;
+
+ case 1:
+ ND_PRINT(",ECT(1)");
+ break;
+
+ case 2:
+ ND_PRINT(",ECT(0)");
+ break;
+
+ case 3:
+ ND_PRINT(",CE");
+ break;
}
- if (ipds->ip->ip_ttl >= 1)
- (void)printf(", ttl %u", ipds->ip->ip_ttl);
+ ip_ttl = EXTRACT_U_1(ipds->ip->ip_ttl);
+ if (ip_ttl >= 1)
+ ND_PRINT(", ttl %u", ip_ttl);
/*
* for the firewall guys, print id, offset.
* On all but the last stick a "+" in the flags portion.
* For unfragmented datagrams, note the don't fragment flag.
*/
-
- (void)printf(", id %u, offset %u, flags [%s], proto %s (%u)",
- EXTRACT_16BITS(&ipds->ip->ip_id),
+ ND_PRINT(", id %u, offset %u, flags [%s], proto %s (%u)",
+ EXTRACT_BE_U_2(ipds->ip->ip_id),
(ipds->off & 0x1fff) * 8,
bittok2str(ip_frag_values, "none", ipds->off&0xe000),
- tok2str(ipproto_values,"unknown",ipds->ip->ip_p),
- ipds->ip->ip_p);
+ tok2str(ipproto_values, "unknown", ip_proto),
+ ip_proto);
- (void)printf(", length %u", EXTRACT_16BITS(&ipds->ip->ip_len));
+ ND_PRINT(", length %u", EXTRACT_BE_U_2(ipds->ip->ip_len));
if ((hlen - sizeof(struct ip)) > 0) {
- printf(", options (");
- ip_optprint((u_char *)(ipds->ip + 1), hlen - sizeof(struct ip));
- printf(")");
+ ND_PRINT(", options (");
+ if (ip_optprint(ndo, (const u_char *)(ipds->ip + 1),
+ hlen - sizeof(struct ip)) == -1) {
+ ND_PRINT(" [truncated-option]");
+ truncated = 1;
+ }
+ ND_PRINT(")");
}
- if (!Kflag && (u_char *)ipds->ip + hlen <= ndo->ndo_snapend) {
- vec[0].ptr = (const u_int8_t *)(void *)ipds->ip;
+ if (!ndo->ndo_Kflag && (const u_char *)ipds->ip + hlen <= ndo->ndo_snapend) {
+ vec[0].ptr = (const uint8_t *)(const void *)ipds->ip;
vec[0].len = hlen;
sum = in_cksum(vec, 1);
if (sum != 0) {
- ip_sum = EXTRACT_16BITS(&ipds->ip->ip_sum);
- (void)printf(", bad cksum %x (->%x)!", ip_sum,
+ ip_sum = EXTRACT_BE_U_2(ipds->ip->ip_sum);
+ ND_PRINT(", bad cksum %x (->%x)!", ip_sum,
in_cksum_shouldbe(ip_sum, sum));
}
}
- printf(")\n ");
+ ND_PRINT(")\n ");
+ if (truncated) {
+ ND_PRINT("%s > %s: ",
+ ipaddr_string(ndo, ipds->ip->ip_src),
+ ipaddr_string(ndo, ipds->ip->ip_dst));
+ goto trunc;
+ }
}
/*
*/
if ((ipds->off & 0x1fff) == 0) {
ipds->cp = (const u_char *)ipds->ip + hlen;
- ipds->nh = ipds->ip->ip_p;
+ ipds->nh = EXTRACT_U_1(ipds->ip->ip_p);
if (ipds->nh != IPPROTO_TCP && ipds->nh != IPPROTO_UDP &&
ipds->nh != IPPROTO_SCTP && ipds->nh != IPPROTO_DCCP) {
- (void)printf("%s > %s: ",
- ipaddr_string(&ipds->ip->ip_src),
- ipaddr_string(&ipds->ip->ip_dst));
+ ND_PRINT("%s > %s: ",
+ ipaddr_string(ndo, ipds->ip->ip_src),
+ ipaddr_string(ndo, ipds->ip->ip_dst));
}
ip_print_demux(ndo, ipds);
} else {
- /* Ultra quiet now means that all this stuff should be suppressed */
- if (qflag > 1) return;
+ /*
+ * Ultra quiet now means that all this stuff should be
+ * suppressed.
+ */
+ if (ndo->ndo_qflag > 1)
+ return;
- /*
- * if this isn't the first frag, we're missing the
- * next level protocol header. print the ip addr
- * and the protocol.
- */
- if (ipds->off & 0x1fff) {
- (void)printf("%s > %s:", ipaddr_string(&ipds->ip->ip_src),
- ipaddr_string(&ipds->ip->ip_dst));
- if (!ndo->ndo_nflag && (proto = getprotobynumber(ipds->ip->ip_p)) != NULL)
- (void)printf(" %s", proto->p_name);
+ /*
+ * This isn't the first frag, so we're missing the
+ * next level protocol header. print the ip addr
+ * and the protocol.
+ */
+ ND_PRINT("%s > %s:", ipaddr_string(ndo, ipds->ip->ip_src),
+ ipaddr_string(ndo, ipds->ip->ip_dst));
+ if (!ndo->ndo_nflag && (p_name = netdb_protoname(ip_proto)) != NULL)
+ ND_PRINT(" %s", p_name);
else
- (void)printf(" ip-proto-%d", ipds->ip->ip_p);
- }
+ ND_PRINT(" ip-proto-%u", ip_proto);
}
+ return;
+
+trunc:
+ nd_print_trunc(ndo);
+ return;
}
void
-ipN_print(register const u_char *bp, register u_int length)
+ipN_print(netdissect_options *ndo, const u_char *bp, u_int length)
{
- struct ip hdr;
-
- if (length < 4) {
- (void)printf("truncated-ip %d", length);
+ ndo->ndo_protocol = "ipN";
+ if (length < 1) {
+ ND_PRINT("truncated-ip %u", length);
return;
}
- memcpy (&hdr, bp, 4);
- switch (IP_V(&hdr)) {
- case 4:
- ip_print (gndo, bp, length);
- return;
-#ifdef INET6
- case 6:
- ip6_print (gndo, bp, length);
- return;
-#endif
+
+ ND_TCHECK_1(bp);
+ switch (EXTRACT_U_1(bp) & 0xF0) {
+ case 0x40:
+ ip_print(ndo, bp, length);
+ break;
+ case 0x60:
+ ip6_print(ndo, bp, length);
+ break;
default:
- (void)printf("unknown ip %d", IP_V(&hdr));
- return;
+ ND_PRINT("unknown ip %u", (EXTRACT_U_1(bp) & 0xF0) >> 4);
+ break;
}
-}
-
-/*
- * Local Variables:
- * c-style: whitesmith
- * c-basic-offset: 8
- * End:
- */
-
+ return;
+trunc:
+ nd_print_trunc(ndo);
+ return;
+}
projects / tcpdump / blobdiff