/*
* Copyright (c) 1998-2007 The TCPDUMP project
+ * Copyright (c) 2009 Florian Forster
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code
* Optimized Link State Protocl (OLSR) as per rfc3626
*
+ * IPv6 additions by Florian Forster <octo at verplant.org>
*/
#ifdef HAVE_CONFIG_H
#include "interface.h"
#include "addrtoname.h"
-#include "extract.h"
-#include "nlpid.h"
+#include "extract.h"
+#include "ip.h"
/*
* RFC 3626 common header
{ 0, NULL}
};
-struct olsr_msg {
+struct olsr_msg4 {
u_int8_t msg_type;
u_int8_t vtime;
u_int8_t msg_len[2];
u_int8_t msg_seq[2];
};
-struct olsr_hello_lq {
+struct olsr_msg6 {
+ u_int8_t msg_type;
+ u_int8_t vtime;
+ u_int8_t msg_len[2];
+ u_int8_t originator[16];
+ u_int8_t ttl;
+ u_int8_t hopcount;
+ u_int8_t msg_seq[2];
+};
+
+struct olsr_hello {
u_int8_t res[2];
u_int8_t htime;
u_int8_t will;
};
-struct olsr_hello_lq_link {
+struct olsr_hello_link {
u_int8_t link_code;
u_int8_t res;
u_int8_t len[2];
};
+struct olsr_tc {
+ u_int8_t ans_seq[2];
+ u_int8_t res[2];
+};
+
+struct olsr_hna4 {
+ u_int8_t network[4];
+ u_int8_t mask[4];
+};
+
+struct olsr_hna6 {
+ u_int8_t network[16];
+ u_int8_t mask[16];
+};
+
+
#define OLSR_EXTRACT_LINK_TYPE(link_code) (link_code & 0x3)
#define OLSR_EXTRACT_NEIGHBOR_TYPE(link_code) (link_code >> 2)
{ 0, NULL}
};
-struct olsr_hello_lq_neighbor {
+struct olsr_lq_neighbor4 {
u_int8_t neighbor[4];
u_int8_t link_quality;
u_int8_t neighbor_link_quality;
u_int8_t res[2];
};
+struct olsr_lq_neighbor6 {
+ u_int8_t neighbor[16];
+ u_int8_t link_quality;
+ u_int8_t neighbor_link_quality;
+ u_int8_t res[2];
+};
+
/*
* macro to convert the 8-bit mantissa/exponent to a double float
- * taken from olsr.org code.
+ * taken from olsr.org.
*/
#define VTIME_SCALE_FACTOR 0.0625
#define ME_TO_DOUBLE(me) \
(double)(VTIME_SCALE_FACTOR*(1+(double)(me>>4)/16)*(double)(1<<(me&0x0F)))
+/*
+ * print a neighbor list with LQ extensions.
+ */
+static void
+olsr_print_lq_neighbor4 (const u_char *msg_data, u_int hello_len)
+{
+ struct olsr_lq_neighbor4 *lq_neighbor;
+
+ while (hello_len >= sizeof(struct olsr_lq_neighbor4)) {
+
+ lq_neighbor = (struct olsr_lq_neighbor4 *)msg_data;
+
+ printf("\n\t neighbor %s, link-quality %.2lf%%"
+ ", neighbor-link-quality %.2lf%%",
+ ipaddr_string(lq_neighbor->neighbor),
+ ((double)lq_neighbor->link_quality/2.55),
+ ((double)lq_neighbor->neighbor_link_quality/2.55));
+
+ msg_data += sizeof(struct olsr_lq_neighbor4);
+ hello_len -= sizeof(struct olsr_lq_neighbor4);
+ }
+}
+
+#if INET6
+static void
+olsr_print_lq_neighbor6 (const u_char *msg_data, u_int hello_len)
+{
+ struct olsr_lq_neighbor6 *lq_neighbor;
+
+ while (hello_len >= sizeof(struct olsr_lq_neighbor6)) {
+
+ lq_neighbor = (struct olsr_lq_neighbor6 *)msg_data;
+
+ printf("\n\t neighbor %s, link-quality %.2lf%%"
+ ", neighbor-link-quality %.2lf%%",
+ ip6addr_string(lq_neighbor->neighbor),
+ ((double)lq_neighbor->link_quality/2.55),
+ ((double)lq_neighbor->neighbor_link_quality/2.55));
+
+ msg_data += sizeof(struct olsr_lq_neighbor6);
+ hello_len -= sizeof(struct olsr_lq_neighbor6);
+ }
+}
+#endif /* INET6 */
+
+/*
+ * print a neighbor list.
+ */
+static void
+olsr_print_neighbor (const u_char *msg_data, u_int hello_len)
+{
+ int neighbor;
+
+ printf("\n\t neighbor\n\t\t");
+ neighbor = 1;
+
+ while (hello_len >= sizeof(struct in_addr)) {
+
+ /* print 4 neighbors per line */
+
+ printf("%s%s", ipaddr_string(msg_data),
+ neighbor % 4 == 0 ? "\n\t\t" : " ");
+
+ msg_data += sizeof(struct in_addr);
+ hello_len -= sizeof(struct in_addr);
+ }
+}
+
+
void
-olsr_print (const u_char *pptr, u_int length)
+olsr_print (const u_char *pptr, u_int length, int is_ipv6)
{
union {
const struct olsr_common *common;
- const struct olsr_msg *msg;
- const struct olsr_hello_lq *hello_lq;
- const struct olsr_hello_lq_link *hello_lq_link;
- const struct olsr_hello_lq_neighbor *hello_lq_neighbor;
+ const struct olsr_msg4 *msg4;
+ const struct olsr_msg6 *msg6;
+ const struct olsr_hello *hello;
+ const struct olsr_hello_link *hello_link;
+ const struct olsr_tc *tc;
+ const struct olsr_hna4 *hna;
} ptr;
u_int msg_type, msg_len, msg_tlen, hello_len;
+ u_int16_t name_entry_type, name_entry_len;
+ u_int name_entry_padding;
u_int8_t link_type, neighbor_type;
const u_char *tptr, *msg_data;
- tptr = pptr;
+ tptr = pptr;
if (length < sizeof(struct olsr_common)) {
goto trunc;
}
if (!TTEST2(*tptr, sizeof(struct olsr_common))) {
- goto trunc;
+ goto trunc;
}
ptr.common = (struct olsr_common *)tptr;
length = MIN(length, EXTRACT_16BITS(ptr.common->packet_len));
- printf("OLSR, seq 0x%04x, length %u",
- EXTRACT_16BITS(ptr.common->packet_seq),
- length);
+ printf("OLSRv%i, seq 0x%04x, length %u",
+ (is_ipv6 == 0) ? 4 : 6,
+ EXTRACT_16BITS(ptr.common->packet_seq),
+ length);
tptr += sizeof(struct olsr_common);
* In non-verbose mode, just print version.
*/
if (vflag < 1) {
- return;
+ return;
}
while (tptr < (pptr+length)) {
-
- if (!TTEST2(*tptr, sizeof(struct olsr_msg)))
+ union
+ {
+ struct olsr_msg4 *v4;
+ struct olsr_msg6 *v6;
+ } msgptr;
+ int msg_len_valid = 0;
+
+ if (!TTEST2(*tptr, sizeof(struct olsr_msg4)))
goto trunc;
- ptr.msg = (struct olsr_msg *)tptr;
-
- msg_type = ptr.msg->msg_type;
- msg_len = EXTRACT_16BITS(ptr.msg->msg_len);
+#if INET6
+ if (is_ipv6)
+ {
+ msgptr.v6 = (struct olsr_msg6 *) tptr;
+ msg_type = msgptr.v6->msg_type;
+ msg_len = EXTRACT_16BITS(msgptr.v6->msg_len);
+ if ((msg_len >= sizeof (struct olsr_msg6))
+ && (msg_len <= length))
+ msg_len_valid = 1;
+
+ /* infinite loop check */
+ if (msg_type == 0 || msg_len == 0) {
+ return;
+ }
- /* infinite loop check */
- if (msg_type == 0 || msg_len == 0) {
- return;
+ printf("\n\t%s Message (%#04x), originator %s, ttl %u, hop %u"
+ "\n\t vtime %.3lfs, msg-seq 0x%04x, length %u%s",
+ tok2str(olsr_msg_values, "Unknown", msg_type),
+ msg_type, ip6addr_string(msgptr.v6->originator),
+ msgptr.v6->ttl,
+ msgptr.v6->hopcount,
+ ME_TO_DOUBLE(msgptr.v6->vtime),
+ EXTRACT_16BITS(msgptr.v6->msg_seq),
+ msg_len, (msg_len_valid == 0) ? " (invalid)" : "");
+
+ msg_tlen = msg_len - sizeof(struct olsr_msg6);
+ msg_data = tptr + sizeof(struct olsr_msg6);
}
+ else /* (!is_ipv6) */
+#endif /* INET6 */
+ {
+ msgptr.v4 = (struct olsr_msg4 *) tptr;
+ msg_type = msgptr.v4->msg_type;
+ msg_len = EXTRACT_16BITS(msgptr.v4->msg_len);
+ if ((msg_len >= sizeof (struct olsr_msg4))
+ && (msg_len <= length))
+ msg_len_valid = 1;
+
+ /* infinite loop check */
+ if (msg_type == 0 || msg_len == 0) {
+ return;
+ }
- printf("\n\t%s Message (%u), originator %s, ttl %u, hop %u"
- "\n\t vtime %.3lfs, msg-seq 0x%04x, length %u",
- tok2str(olsr_msg_values, "Unknown", msg_type),
- msg_type, ipaddr_string(ptr.msg->originator),
- ptr.msg->ttl,
- ptr.msg->hopcount,
- ME_TO_DOUBLE(ptr.msg->vtime),
- EXTRACT_16BITS(ptr.msg->msg_seq),
- msg_len);
-
- msg_tlen = msg_len - sizeof(struct olsr_msg);
- msg_data = tptr + sizeof(struct olsr_msg);
+ printf("\n\t%s Message (%#04x), originator %s, ttl %u, hop %u"
+ "\n\t vtime %.3lfs, msg-seq 0x%04x, length %u%s",
+ tok2str(olsr_msg_values, "Unknown", msg_type),
+ msg_type, ipaddr_string(msgptr.v4->originator),
+ msgptr.v4->ttl,
+ msgptr.v4->hopcount,
+ ME_TO_DOUBLE(msgptr.v4->vtime),
+ EXTRACT_16BITS(msgptr.v4->msg_seq),
+ msg_len, (msg_len_valid == 0) ? " (invalid)" : "");
+
+ msg_tlen = msg_len - sizeof(struct olsr_msg4);
+ msg_data = tptr + sizeof(struct olsr_msg4);
+ }
switch (msg_type) {
+ case OLSR_HELLO_MSG:
case OLSR_HELLO_LQ_MSG:
- ptr.hello_lq = (struct olsr_hello_lq *)msg_data;
+ if (!TTEST2(*msg_data, sizeof(struct olsr_hello)))
+ goto trunc;
+
+ ptr.hello = (struct olsr_hello *)msg_data;
printf("\n\t hello-time %.3lfs, MPR willingness %u",
- ME_TO_DOUBLE(ptr.hello_lq->htime),
- ptr.hello_lq->will);
- msg_data += sizeof(struct olsr_hello_lq);
- msg_tlen -= sizeof(struct olsr_hello_lq);
+ ME_TO_DOUBLE(ptr.hello->htime), ptr.hello->will);
+ msg_data += sizeof(struct olsr_hello);
+ msg_tlen -= sizeof(struct olsr_hello);
- while (msg_tlen >= sizeof(struct olsr_hello_lq_link)) {
+ while (msg_tlen >= sizeof(struct olsr_hello_link)) {
+ int hello_len_valid = 0;
/*
* link-type.
*/
- ptr.hello_lq_link = (struct olsr_hello_lq_link *)msg_data;
+ if (!TTEST2(*msg_data, sizeof(struct olsr_hello_link)))
+ goto trunc;
+
+ ptr.hello_link = (struct olsr_hello_link *)msg_data;
- hello_len = EXTRACT_16BITS(ptr.hello_lq_link->len);
- link_type = OLSR_EXTRACT_LINK_TYPE(ptr.hello_lq_link->link_code);
- neighbor_type = OLSR_EXTRACT_NEIGHBOR_TYPE(ptr.hello_lq_link->link_code);
+ hello_len = EXTRACT_16BITS(ptr.hello_link->len);
+ link_type = OLSR_EXTRACT_LINK_TYPE(ptr.hello_link->link_code);
+ neighbor_type = OLSR_EXTRACT_NEIGHBOR_TYPE(ptr.hello_link->link_code);
- printf("\n\t link-type %s, neighbor-type %s, len %u",
+ if ((hello_len <= msg_tlen)
+ && (hello_len >= sizeof(struct olsr_hello_link)))
+ hello_len_valid = 1;
+
+ printf("\n\t link-type %s, neighbor-type %s, len %u%s",
tok2str(olsr_link_type_values, "Unknown", link_type),
tok2str(olsr_neighbor_type_values, "Unknown", neighbor_type),
- hello_len);
+ hello_len,
+ (hello_len_valid == 0) ? " (invalid)" : "");
+
+ if (hello_len_valid == 0)
+ break;
+
+ msg_data += sizeof(struct olsr_hello_link);
+ msg_tlen -= sizeof(struct olsr_hello_link);
+ hello_len -= sizeof(struct olsr_hello_link);
+
+ if (msg_type == OLSR_HELLO_MSG) {
+ olsr_print_neighbor(msg_data, hello_len);
+ } else {
+#if INET6
+ if (is_ipv6)
+ olsr_print_lq_neighbor6(msg_data, hello_len);
+ else
+#endif
+ olsr_print_lq_neighbor4(msg_data, hello_len);
+ }
+
+ msg_data += hello_len;
+ msg_tlen -= hello_len;
+ }
+ break;
+
+ case OLSR_TC_MSG:
+ case OLSR_TC_LQ_MSG:
+ if (!TTEST2(*msg_data, sizeof(struct olsr_tc)))
+ goto trunc;
+
+ ptr.tc = (struct olsr_tc *)msg_data;
+ printf("\n\t advertised neighbor seq 0x%04x",
+ EXTRACT_16BITS(ptr.tc->ans_seq));
+ msg_data += sizeof(struct olsr_tc);
+ msg_tlen -= sizeof(struct olsr_tc);
+
+ if (msg_type == OLSR_TC_MSG) {
+ olsr_print_neighbor(msg_data, msg_tlen);
+ } else {
+#if INET6
+ if (is_ipv6)
+ olsr_print_lq_neighbor6(msg_data, msg_tlen);
+ else
+#endif
+ olsr_print_lq_neighbor4(msg_data, msg_tlen);
+ }
+ break;
+
+ case OLSR_MID_MSG:
+ {
+ size_t addr_size = sizeof(struct in_addr);
+
+#if INET6
+ if (is_ipv6)
+ addr_size = sizeof(struct in6_addr);
+#endif
+
+ while (msg_tlen >= addr_size) {
+ if (!TTEST2(*msg_data, addr_size))
+ goto trunc;
+
+ printf("\n\t interface address %s",
+#if INET6
+ is_ipv6 ? ip6addr_string(msg_data) :
+#endif
+ ipaddr_string(msg_data));
+ msg_data += addr_size;
+ msg_tlen -= addr_size;
+ }
+ break;
+ }
+
+ case OLSR_HNA_MSG:
+ printf("\n\t Advertised networks (total %u)",
+ (unsigned int) (msg_tlen / sizeof(struct olsr_hna6)));
+#if INET6
+ if (is_ipv6)
+ {
+ int i = 0;
+ while (msg_tlen >= sizeof(struct olsr_hna6)) {
+ struct olsr_hna6 *hna6;
+
+ if (!TTEST2(*msg_data, sizeof(struct olsr_hna6)))
+ goto trunc;
+
+ hna6 = (struct olsr_hna6 *)msg_data;
+
+ printf("\n\t #%i: %s/%u",
+ i, ip6addr_string(hna6->network),
+ mask62plen (hna6->mask));
+
+ msg_data += sizeof(struct olsr_hna6);
+ msg_tlen -= sizeof(struct olsr_hna6);
+ }
+ }
+ else
+#endif
+ {
+ int col = 0;
+ while (msg_tlen >= sizeof(struct olsr_hna4)) {
+ if (!TTEST2(*msg_data, sizeof(struct olsr_hna4)))
+ goto trunc;
- msg_data += sizeof(struct olsr_hello_lq_link);
- msg_tlen -= sizeof(struct olsr_hello_lq_link);
+ ptr.hna = (struct olsr_hna4 *)msg_data;
- hello_len -= sizeof(struct olsr_hello_lq_link);
- while (hello_len >= sizeof(struct olsr_hello_lq_neighbor)) {
+ /* print 4 prefixes per line */
+ if (col == 0)
+ printf ("\n\t ");
+ else
+ printf (", ");
- /*
- * neighbor.
- */
- ptr.hello_lq_neighbor =
- (struct olsr_hello_lq_neighbor *)msg_data;
+ printf("%s/%u",
+ ipaddr_string(ptr.hna->network),
+ mask2plen(EXTRACT_32BITS(ptr.hna->mask)));
- printf("\n\t neighbor %s, link-quality %.2lf%%"
- ", neighbor-link-quality %.2lf%%",
- ipaddr_string(ptr.hello_lq_neighbor->neighbor),
- ((double)ptr.hello_lq_neighbor->link_quality/2.55),
- ((double)ptr.hello_lq_neighbor->neighbor_link_quality/2.55));
+ msg_data += sizeof(struct olsr_hna4);
+ msg_tlen -= sizeof(struct olsr_hna4);
- msg_data += sizeof(struct olsr_hello_lq_neighbor);
- msg_tlen -= sizeof(struct olsr_hello_lq_neighbor);
- hello_len -= sizeof(struct olsr_hello_lq_neighbor);
+ col = (col + 1) % 4;
}
}
break;
+ case OLSR_NAMESERVICE_MSG:
+ {
+ u_int name_entries = EXTRACT_16BITS(msg_data+2);
+ u_int addr_size = 4;
+ int name_entries_valid = 0;
+ u_int i;
+
+ if (is_ipv6)
+ addr_size = 16;
+
+ if ((name_entries > 0)
+ && ((name_entries * (4 + addr_size)) <= msg_tlen))
+ name_entries_valid = 1;
+
+ if (msg_tlen < 4)
+ goto trunc;
+ if (!TTEST2(*msg_data, 4))
+ goto trunc;
+
+ printf("\n\t Version %u, Entries %u%s",
+ EXTRACT_16BITS(msg_data),
+ name_entries, (name_entries_valid == 0) ? " (invalid)" : "");
+
+ if (name_entries_valid == 0)
+ break;
+
+ msg_data += 4;
+ msg_tlen -= 4;
+
+ for (i = 0; i < name_entries; i++) {
+ int name_entry_len_valid = 0;
+
+ if (msg_tlen < 4)
+ break;
+ if (!TTEST2(*msg_data, 4))
+ goto trunc;
+
+ name_entry_type = EXTRACT_16BITS(msg_data);
+ name_entry_len = EXTRACT_16BITS(msg_data+2);
+
+ msg_data += 4;
+ msg_tlen -= 4;
+
+ if ((name_entry_len > 0) && ((addr_size + name_entry_len) <= msg_tlen))
+ name_entry_len_valid = 1;
+
+ printf("\n\t #%u: type %#06x, length %u%s",
+ (unsigned int) i, name_entry_type,
+ name_entry_len, (name_entry_len_valid == 0) ? " (invalid)" : "");
+
+ if (name_entry_len_valid == 0)
+ break;
+
+ /* 32-bit alignment */
+ name_entry_padding = 0;
+ if (name_entry_len%4 != 0)
+ name_entry_padding = 4-(name_entry_len%4);
+
+ if (msg_tlen < addr_size + name_entry_len + name_entry_padding)
+ goto trunc;
+
+ if (!TTEST2(*msg_data, addr_size + name_entry_len + name_entry_padding))
+ goto trunc;
+
+#if INET6
+ if (is_ipv6)
+ printf(", address %s, name \"",
+ ip6addr_string(msg_data));
+ else
+#endif
+ printf(", address %s, name \"",
+ ipaddr_string(msg_data));
+ fn_printn(msg_data + addr_size, name_entry_len, NULL);
+ printf("\"");
+
+ msg_data += addr_size + name_entry_len + name_entry_padding;
+ msg_tlen -= addr_size + name_entry_len + name_entry_padding;
+ } /* for (i = 0; i < name_entries; i++) */
+ break;
+ } /* case OLSR_NAMESERVICE_MSG */
+
/*
* FIXME those are the defined messages that lack a decoder
* you are welcome to contribute code ;-)
*/
-
- case OLSR_HELLO_MSG:
- case OLSR_TC_MSG:
- case OLSR_MID_MSG:
- case OLSR_HNA_MSG:
case OLSR_POWERINFO_MSG:
- case OLSR_NAMESERVICE_MSG:
- case OLSR_TC_LQ_MSG:
default:
- print_unknown_data(msg_data, "\n\t ", msg_tlen);
+ print_unknown_data(msg_data, "\n\t ", msg_tlen);
break;
- }
+ } /* switch (msg_type) */
tptr += msg_len;
- }
+ } /* while (tptr < (pptr+length)) */
return;
projects / tcpdump / blobdiff