/* \summary: Internet Control Message Protocol (ICMP) printer */
#ifdef HAVE_CONFIG_H
-#include "config.h"
+#include <config.h>
#endif
-#include <netdissect-stdinc.h>
+#include "netdissect-stdinc.h"
#include <stdio.h>
#include <string.h>
nd_uint8_t icmp_code; /* type sub code */
nd_uint16_t icmp_cksum; /* ones complement cksum of struct */
union {
- nd_uint8_t ih_pptr; /* ICMP_PARAMPROB */
- struct in_addr ih_gwaddr; /* ICMP_REDIRECT */
+ nd_uint8_t ih_pptr; /* ICMP_PARAMPROB */
+ nd_ipv4 ih_gwaddr; /* ICMP_REDIRECT */
struct ih_idseq {
nd_uint16_t icd_id;
nd_uint16_t icd_seq;
{ 0, NULL }
};
-/* Formats for most of the ICMP_UNREACH codes */
-static const struct tok unreach2str[] = {
- { ICMP_UNREACH_NET, "net %s unreachable" },
- { ICMP_UNREACH_HOST, "host %s unreachable" },
- { ICMP_UNREACH_SRCFAIL,
- "%s unreachable - source route failed" },
- { ICMP_UNREACH_NET_UNKNOWN, "net %s unreachable - unknown" },
- { ICMP_UNREACH_HOST_UNKNOWN, "host %s unreachable - unknown" },
- { ICMP_UNREACH_ISOLATED,
- "%s unreachable - source host isolated" },
- { ICMP_UNREACH_NET_PROHIB,
- "net %s unreachable - admin prohibited" },
- { ICMP_UNREACH_HOST_PROHIB,
- "host %s unreachable - admin prohibited" },
- { ICMP_UNREACH_TOSNET,
- "net %s unreachable - tos prohibited" },
- { ICMP_UNREACH_TOSHOST,
- "host %s unreachable - tos prohibited" },
- { ICMP_UNREACH_FILTER_PROHIB,
- "host %s unreachable - admin prohibited filter" },
- { ICMP_UNREACH_HOST_PRECEDENCE,
- "host %s unreachable - host precedence violation" },
- { ICMP_UNREACH_PRECEDENCE_CUTOFF,
- "host %s unreachable - precedence cutoff" },
- { 0, NULL }
-};
-
-/* Formats for the ICMP_REDIRECT codes */
-static const struct tok type2str[] = {
- { ICMP_REDIRECT_NET, "redirect %s to net %s" },
- { ICMP_REDIRECT_HOST, "redirect %s to host %s" },
- { ICMP_REDIRECT_TOSNET, "redirect-tos %s to net %s" },
- { ICMP_REDIRECT_TOSHOST, "redirect-tos %s to host %s" },
- { 0, NULL }
-};
-
/* rfc1191 */
struct mtu_discovery {
nd_uint16_t unused;
* draft-bonica-internet-icmp-08
*
* The Destination Unreachable, Time Exceeded
- * and Parameter Problem messages are slighly changed as per
+ * and Parameter Problem messages are slightly changed as per
* the above draft. A new Length field gets added to give
* the caller an idea about the length of the piggypacked
* IP packet before the MPLS extension header starts.
uint8_t icmp_type, icmp_code;
const struct icmp_ext_t *ext_dp;
const struct ip *ip;
- const char *str, *fmt;
+ const char *str;
const struct ip *oip;
uint8_t ip_proto;
const struct udphdr *ouh;
uint32_t raw_label;
const u_char *snapend_save;
const struct icmp_mpls_ext_object_header_t *icmp_mpls_ext_object_header;
- u_int hlen, dport, mtu, obj_tlen, obj_class_num, obj_ctype;
+ u_int hlen, mtu, obj_tlen, obj_class_num, obj_ctype;
+ uint16_t dport;
char buf[MAXHOSTNAMELEN + 100];
struct cksum_vec vec[1];
+ ndo->ndo_protocol = "icmp";
dp = (const struct icmp *)bp;
ext_dp = (const struct icmp_ext_t *)bp;
ip = (const struct ip *)bp2;
str = buf;
- ND_TCHECK(dp->icmp_code);
- icmp_type = EXTRACT_U_1(dp->icmp_type);
- icmp_code = EXTRACT_U_1(dp->icmp_code);
+ icmp_type = GET_U_1(dp->icmp_type);
+ icmp_code = GET_U_1(dp->icmp_code);
switch (icmp_type) {
case ICMP_ECHO:
case ICMP_ECHOREPLY:
- ND_TCHECK(dp->icmp_seq);
(void)snprintf(buf, sizeof(buf), "echo %s, id %u, seq %u",
icmp_type == ICMP_ECHO ?
"request" : "reply",
- EXTRACT_BE_U_2(dp->icmp_id),
- EXTRACT_BE_U_2(dp->icmp_seq));
+ GET_BE_U_2(dp->icmp_id),
+ GET_BE_U_2(dp->icmp_seq));
break;
case ICMP_UNREACH:
- ND_TCHECK(dp->icmp_ip.ip_dst);
switch (icmp_code) {
+ case ICMP_UNREACH_NET:
+ (void)snprintf(buf, sizeof(buf),
+ "net %s unreachable",
+ GET_IPADDR_STRING(dp->icmp_ip.ip_dst));
+ break;
+
+ case ICMP_UNREACH_HOST:
+ (void)snprintf(buf, sizeof(buf),
+ "host %s unreachable",
+ GET_IPADDR_STRING(dp->icmp_ip.ip_dst));
+ break;
+
case ICMP_UNREACH_PROTOCOL:
- ND_TCHECK_1(dp->icmp_ip.ip_p);
(void)snprintf(buf, sizeof(buf),
- "%s protocol %d unreachable",
- ipaddr_string(ndo, &dp->icmp_ip.ip_dst),
- EXTRACT_U_1(dp->icmp_ip.ip_p));
+ "%s protocol %u unreachable",
+ GET_IPADDR_STRING(dp->icmp_ip.ip_dst),
+ GET_U_1(dp->icmp_ip.ip_p));
break;
case ICMP_UNREACH_PORT:
- ND_TCHECK(dp->icmp_ip.ip_p);
+ ND_TCHECK_1(dp->icmp_ip.ip_p);
oip = &dp->icmp_ip;
hlen = IP_HL(oip) * 4;
ouh = (const struct udphdr *)(((const u_char *)oip) + hlen);
- ND_TCHECK(ouh->uh_dport);
- dport = EXTRACT_BE_U_2(ouh->uh_dport);
- ip_proto = EXTRACT_U_1(oip->ip_p);
+ dport = GET_BE_U_2(ouh->uh_dport);
+ ip_proto = GET_U_1(oip->ip_p);
switch (ip_proto) {
case IPPROTO_TCP:
(void)snprintf(buf, sizeof(buf),
"%s tcp port %s unreachable",
- ipaddr_string(ndo, &oip->ip_dst),
+ GET_IPADDR_STRING(oip->ip_dst),
tcpport_string(ndo, dport));
break;
case IPPROTO_UDP:
(void)snprintf(buf, sizeof(buf),
"%s udp port %s unreachable",
- ipaddr_string(ndo, &oip->ip_dst),
+ GET_IPADDR_STRING(oip->ip_dst),
udpport_string(ndo, dport));
break;
default:
(void)snprintf(buf, sizeof(buf),
"%s protocol %u port %u unreachable",
- ipaddr_string(ndo, &oip->ip_dst),
+ GET_IPADDR_STRING(oip->ip_dst),
ip_proto, dport);
break;
}
{
const struct mtu_discovery *mp;
mp = (const struct mtu_discovery *)(const u_char *)&dp->icmp_void;
- mtu = EXTRACT_BE_U_2(mp->nexthopmtu);
+ mtu = GET_BE_U_2(mp->nexthopmtu);
if (mtu) {
(void)snprintf(buf, sizeof(buf),
- "%s unreachable - need to frag (mtu %d)",
- ipaddr_string(ndo, &dp->icmp_ip.ip_dst), mtu);
+ "%s unreachable - need to frag (mtu %u)",
+ GET_IPADDR_STRING(dp->icmp_ip.ip_dst), mtu);
} else {
(void)snprintf(buf, sizeof(buf),
"%s unreachable - need to frag",
- ipaddr_string(ndo, &dp->icmp_ip.ip_dst));
+ GET_IPADDR_STRING(dp->icmp_ip.ip_dst));
}
}
break;
+ case ICMP_UNREACH_SRCFAIL:
+ (void)snprintf(buf, sizeof(buf),
+ "%s unreachable - source route failed",
+ GET_IPADDR_STRING(dp->icmp_ip.ip_dst));
+ break;
+
+ case ICMP_UNREACH_NET_UNKNOWN:
+ (void)snprintf(buf, sizeof(buf),
+ "net %s unreachable - unknown",
+ GET_IPADDR_STRING(dp->icmp_ip.ip_dst));
+ break;
+
+ case ICMP_UNREACH_HOST_UNKNOWN:
+ (void)snprintf(buf, sizeof(buf),
+ "host %s unreachable - unknown",
+ GET_IPADDR_STRING(dp->icmp_ip.ip_dst));
+ break;
+
+ case ICMP_UNREACH_ISOLATED:
+ (void)snprintf(buf, sizeof(buf),
+ "%s unreachable - source host isolated",
+ GET_IPADDR_STRING(dp->icmp_ip.ip_dst));
+ break;
+
+ case ICMP_UNREACH_NET_PROHIB:
+ (void)snprintf(buf, sizeof(buf),
+ "net %s unreachable - admin prohibited",
+ GET_IPADDR_STRING(dp->icmp_ip.ip_dst));
+ break;
+
+ case ICMP_UNREACH_HOST_PROHIB:
+ (void)snprintf(buf, sizeof(buf),
+ "host %s unreachable - admin prohibited",
+ GET_IPADDR_STRING(dp->icmp_ip.ip_dst));
+ break;
+
+ case ICMP_UNREACH_TOSNET:
+ (void)snprintf(buf, sizeof(buf),
+ "net %s unreachable - tos prohibited",
+ GET_IPADDR_STRING(dp->icmp_ip.ip_dst));
+ break;
+
+ case ICMP_UNREACH_TOSHOST:
+ (void)snprintf(buf, sizeof(buf),
+ "host %s unreachable - tos prohibited",
+ GET_IPADDR_STRING(dp->icmp_ip.ip_dst));
+ break;
+
+ case ICMP_UNREACH_FILTER_PROHIB:
+ (void)snprintf(buf, sizeof(buf),
+ "host %s unreachable - admin prohibited filter",
+ GET_IPADDR_STRING(dp->icmp_ip.ip_dst));
+ break;
+
+ case ICMP_UNREACH_HOST_PRECEDENCE:
+ (void)snprintf(buf, sizeof(buf),
+ "host %s unreachable - host precedence violation",
+ GET_IPADDR_STRING(dp->icmp_ip.ip_dst));
+ break;
+
+ case ICMP_UNREACH_PRECEDENCE_CUTOFF:
+ (void)snprintf(buf, sizeof(buf),
+ "host %s unreachable - precedence cutoff",
+ GET_IPADDR_STRING(dp->icmp_ip.ip_dst));
+ break;
+
default:
- fmt = tok2str(unreach2str, "#%d %%s unreachable",
+ (void)snprintf(buf, sizeof(buf),
+ "%s unreachable - #%u",
+ GET_IPADDR_STRING(dp->icmp_ip.ip_dst),
icmp_code);
- (void)snprintf(buf, sizeof(buf), fmt,
- ipaddr_string(ndo, &dp->icmp_ip.ip_dst));
break;
}
break;
case ICMP_REDIRECT:
- ND_TCHECK(dp->icmp_ip.ip_dst);
- fmt = tok2str(type2str, "redirect-#%d %%s to net %%s",
- icmp_code);
- (void)snprintf(buf, sizeof(buf), fmt,
- ipaddr_string(ndo, &dp->icmp_ip.ip_dst),
- ipaddr_string(ndo, &dp->icmp_gwaddr));
+ switch (icmp_code) {
+
+ case ICMP_REDIRECT_NET:
+ (void)snprintf(buf, sizeof(buf),
+ "redirect %s to net %s",
+ GET_IPADDR_STRING(dp->icmp_ip.ip_dst),
+ GET_IPADDR_STRING(dp->icmp_gwaddr));
+ break;
+
+ case ICMP_REDIRECT_HOST:
+ (void)snprintf(buf, sizeof(buf),
+ "redirect %s to host %s",
+ GET_IPADDR_STRING(dp->icmp_ip.ip_dst),
+ GET_IPADDR_STRING(dp->icmp_gwaddr));
+ break;
+
+ case ICMP_REDIRECT_TOSNET:
+ (void)snprintf(buf, sizeof(buf),
+ "redirect-tos %s to net %s",
+ GET_IPADDR_STRING(dp->icmp_ip.ip_dst),
+ GET_IPADDR_STRING(dp->icmp_gwaddr));
+ break;
+
+ case ICMP_REDIRECT_TOSHOST:
+ (void)snprintf(buf, sizeof(buf),
+ "redirect-tos %s to host %s",
+ GET_IPADDR_STRING(dp->icmp_ip.ip_dst),
+ GET_IPADDR_STRING(dp->icmp_gwaddr));
+ break;
+
+ default:
+ (void)snprintf(buf, sizeof(buf),
+ "redirect-#%u %s to %s", icmp_code,
+ GET_IPADDR_STRING(dp->icmp_ip.ip_dst),
+ GET_IPADDR_STRING(dp->icmp_gwaddr));
+ break;
+ }
break;
case ICMP_ROUTERADVERT:
ND_TCHECK_SIZE(ihp);
(void)strncpy(cp, " lifetime ", sizeof(buf) - (cp - buf));
cp = buf + strlen(buf);
- lifetime = EXTRACT_BE_U_2(ihp->ird_lifetime);
+ lifetime = GET_BE_U_2(ihp->ird_lifetime);
if (lifetime < 60) {
(void)snprintf(cp, sizeof(buf) - (cp - buf), "%u",
lifetime);
}
cp = buf + strlen(buf);
- num = EXTRACT_U_1(ihp->ird_addrnum);
- (void)snprintf(cp, sizeof(buf) - (cp - buf), " %d:", num);
+ num = GET_U_1(ihp->ird_addrnum);
+ (void)snprintf(cp, sizeof(buf) - (cp - buf), " %u:", num);
cp = buf + strlen(buf);
- size = EXTRACT_U_1(ihp->ird_addrsiz);
+ size = GET_U_1(ihp->ird_addrsiz);
if (size != 2) {
(void)snprintf(cp, sizeof(buf) - (cp - buf),
- " [size %d]", size);
+ " [size %u]", size);
break;
}
idp = (const struct id_rdiscovery *)&dp->icmp_data;
- while (num-- > 0) {
+ while (num > 0) {
ND_TCHECK_SIZE(idp);
(void)snprintf(cp, sizeof(buf) - (cp - buf), " {%s %u}",
- ipaddr_string(ndo, &idp->ird_addr),
- EXTRACT_BE_U_4(idp->ird_pref));
+ GET_IPADDR_STRING(idp->ird_addr),
+ GET_BE_U_4(idp->ird_pref));
cp = buf + strlen(buf);
++idp;
+ num--;
}
}
break;
case ICMP_TIMXCEED:
- ND_TCHECK(dp->icmp_ip.ip_dst);
+ ND_TCHECK_4(dp->icmp_ip.ip_dst);
switch (icmp_code) {
case ICMP_TIMXCEED_INTRANS:
(void)snprintf(buf, sizeof(buf),
"parameter problem - code %u", icmp_code);
else {
- ND_TCHECK(dp->icmp_pptr);
(void)snprintf(buf, sizeof(buf),
- "parameter problem - octet %u", EXTRACT_U_1(dp->icmp_pptr));
+ "parameter problem - octet %u",
+ GET_U_1(dp->icmp_pptr));
}
break;
case ICMP_MASKREPLY:
- ND_TCHECK(dp->icmp_mask);
(void)snprintf(buf, sizeof(buf), "address mask is 0x%08x",
- EXTRACT_BE_U_4(dp->icmp_mask));
+ GET_BE_U_4(dp->icmp_mask));
break;
case ICMP_TSTAMP:
- ND_TCHECK(dp->icmp_seq);
(void)snprintf(buf, sizeof(buf),
"time stamp query id %u seq %u",
- EXTRACT_BE_U_2(dp->icmp_id),
- EXTRACT_BE_U_2(dp->icmp_seq));
+ GET_BE_U_2(dp->icmp_id),
+ GET_BE_U_2(dp->icmp_seq));
break;
case ICMP_TSTAMPREPLY:
- ND_TCHECK(dp->icmp_ttime);
+ ND_TCHECK_4(dp->icmp_ttime);
(void)snprintf(buf, sizeof(buf),
"time stamp reply id %u seq %u: org %s",
- EXTRACT_BE_U_2(dp->icmp_id),
- EXTRACT_BE_U_2(dp->icmp_seq),
- icmp_tstamp_print(EXTRACT_BE_U_4(dp->icmp_otime)));
+ GET_BE_U_2(dp->icmp_id),
+ GET_BE_U_2(dp->icmp_seq),
+ icmp_tstamp_print(GET_BE_U_4(dp->icmp_otime)));
(void)snprintf(buf+strlen(buf),sizeof(buf)-strlen(buf),", recv %s",
- icmp_tstamp_print(EXTRACT_BE_U_4(dp->icmp_rtime)));
+ icmp_tstamp_print(GET_BE_U_4(dp->icmp_rtime)));
(void)snprintf(buf+strlen(buf),sizeof(buf)-strlen(buf),", xmit %s",
- icmp_tstamp_print(EXTRACT_BE_U_4(dp->icmp_ttime)));
+ icmp_tstamp_print(GET_BE_U_4(dp->icmp_ttime)));
break;
default:
- str = tok2str(icmp2str, "type-#%d", icmp_type);
+ str = tok2str(icmp2str, "type-#%u", icmp_type);
break;
}
ND_PRINT("ICMP %s, length %u", str, plen);
vec[0].len = plen;
sum = in_cksum(vec, 1);
if (sum != 0) {
- uint16_t icmp_sum = EXTRACT_BE_U_2(dp->icmp_cksum);
+ uint16_t icmp_sum = GET_BE_U_2(dp->icmp_cksum);
ND_PRINT(" (wrong icmp cksum %x (->%x)!)",
icmp_sum,
in_cksum_shouldbe(icmp_sum, sum));
ND_PRINT("\n\t");
ip = (const struct ip *)bp;
snapend_save = ndo->ndo_snapend;
- ND_TCHECK_2(ip->ip_len);
- ip_print(ndo, bp, EXTRACT_BE_U_2(ip->ip_len));
+ ip_print(ndo, bp, GET_BE_U_2(ip->ip_len));
ndo->ndo_snapend = snapend_save;
}
+ /* ndo_protocol reassignment after ip_print() call */
+ ndo->ndo_protocol = "icmp";
+
/*
* Attempt to decode the MPLS extensions only for some ICMP types.
*/
* to check if an extension header is present. This is expedient,
* however not all implementations set the length field proper.
*/
- if (EXTRACT_U_1(ext_dp->icmp_length) == 0 &&
+ if (GET_U_1(ext_dp->icmp_length) == 0 &&
ND_TTEST_LEN(ext_dp->icmp_ext_version_res, plen - ICMP_EXTD_MINLEN)) {
vec[0].ptr = (const uint8_t *)(const void *)&ext_dp->icmp_ext_version_res;
vec[0].len = plen - ICMP_EXTD_MINLEN;
vec[0].ptr = (const uint8_t *)(const void *)&ext_dp->icmp_ext_version_res;
vec[0].len = hlen;
ND_PRINT(", checksum 0x%04x (%scorrect), length %u",
- EXTRACT_BE_U_2(ext_dp->icmp_ext_checksum),
+ GET_BE_U_2(ext_dp->icmp_ext_checksum),
in_cksum(vec, 1) ? "in" : "",
hlen);
}
icmp_mpls_ext_object_header = (const struct icmp_mpls_ext_object_header_t *)obj_tptr;
ND_TCHECK_SIZE(icmp_mpls_ext_object_header);
- obj_tlen = EXTRACT_BE_U_2(icmp_mpls_ext_object_header->length);
- obj_class_num = EXTRACT_U_1(icmp_mpls_ext_object_header->class_num);
- obj_ctype = EXTRACT_U_1(icmp_mpls_ext_object_header->ctype);
+ obj_tlen = GET_BE_U_2(icmp_mpls_ext_object_header->length);
+ obj_class_num = GET_U_1(icmp_mpls_ext_object_header->class_num);
+ obj_ctype = GET_U_1(icmp_mpls_ext_object_header->ctype);
obj_tptr += sizeof(struct icmp_mpls_ext_object_header_t);
ND_PRINT("\n\t %s Object (%u), Class-Type: %u, length %u",
case 1:
switch(obj_ctype) {
case 1:
- ND_TCHECK_4(obj_tptr);
- raw_label = EXTRACT_BE_U_4(obj_tptr);
+ raw_label = GET_BE_U_4(obj_tptr);
ND_PRINT("\n\t label %u, exp %u", MPLS_LABEL(raw_label), MPLS_EXP(raw_label));
if (MPLS_STACK(raw_label))
ND_PRINT(", [S]");
return;
trunc:
- ND_PRINT("[|icmp]");
+ nd_print_trunc(ndo);
}
-/*
- * Local Variables:
- * c-style: whitesmith
- * c-basic-offset: 8
- * End:
- */
projects / tcpdump / blobdiff