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-rw-r--r--print-olsr.c719
1 files changed, 719 insertions, 0 deletions
diff --git a/print-olsr.c b/print-olsr.c
new file mode 100644
index 000000000000..e67988dfd8cb
--- /dev/null
+++ b/print-olsr.c
@@ -0,0 +1,719 @@
+/*
+ * 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
+ * distributions retain the above copyright notice and this paragraph
+ * in its entirety, and (2) distributions including binary code include
+ * the above copyright notice and this paragraph in its entirety in
+ * the documentation or other materials provided with the distribution.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND
+ * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
+ * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE.
+ *
+ * Original code by Hannes Gredler <hannes@gredler.at>
+ * IPv6 additions by Florian Forster <octo at verplant.org>
+ */
+
+/* \summary: Optimized Link State Routing Protocol (OLSR) printer */
+
+/* specification: RFC 3626 */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <netdissect-stdinc.h>
+
+#include "netdissect.h"
+#include "addrtoname.h"
+#include "extract.h"
+
+/*
+ * RFC 3626 common header
+ *
+ * 0 1 2 3
+ * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Packet Length | Packet Sequence Number |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Message Type | Vtime | Message Size |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Originator Address |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Time To Live | Hop Count | Message Sequence Number |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | |
+ * : MESSAGE :
+ * | |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Message Type | Vtime | Message Size |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Originator Address |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Time To Live | Hop Count | Message Sequence Number |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | |
+ * : MESSAGE :
+ * | |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * : :
+ */
+
+struct olsr_common {
+ uint8_t packet_len[2];
+ uint8_t packet_seq[2];
+};
+
+#define OLSR_HELLO_MSG 1 /* rfc3626 */
+#define OLSR_TC_MSG 2 /* rfc3626 */
+#define OLSR_MID_MSG 3 /* rfc3626 */
+#define OLSR_HNA_MSG 4 /* rfc3626 */
+#define OLSR_POWERINFO_MSG 128
+#define OLSR_NAMESERVICE_MSG 130
+#define OLSR_HELLO_LQ_MSG 201 /* LQ extensions olsr.org */
+#define OLSR_TC_LQ_MSG 202 /* LQ extensions olsr.org */
+
+static const struct tok olsr_msg_values[] = {
+ { OLSR_HELLO_MSG, "Hello" },
+ { OLSR_TC_MSG, "TC" },
+ { OLSR_MID_MSG, "MID" },
+ { OLSR_HNA_MSG, "HNA" },
+ { OLSR_POWERINFO_MSG, "Powerinfo" },
+ { OLSR_NAMESERVICE_MSG, "Nameservice" },
+ { OLSR_HELLO_LQ_MSG, "Hello-LQ" },
+ { OLSR_TC_LQ_MSG, "TC-LQ" },
+ { 0, NULL}
+};
+
+struct olsr_msg4 {
+ uint8_t msg_type;
+ uint8_t vtime;
+ uint8_t msg_len[2];
+ uint8_t originator[4];
+ uint8_t ttl;
+ uint8_t hopcount;
+ uint8_t msg_seq[2];
+};
+
+struct olsr_msg6 {
+ uint8_t msg_type;
+ uint8_t vtime;
+ uint8_t msg_len[2];
+ uint8_t originator[16];
+ uint8_t ttl;
+ uint8_t hopcount;
+ uint8_t msg_seq[2];
+};
+
+struct olsr_hello {
+ uint8_t res[2];
+ uint8_t htime;
+ uint8_t will;
+};
+
+struct olsr_hello_link {
+ uint8_t link_code;
+ uint8_t res;
+ uint8_t len[2];
+};
+
+struct olsr_tc {
+ uint8_t ans_seq[2];
+ uint8_t res[2];
+};
+
+struct olsr_hna4 {
+ uint8_t network[4];
+ uint8_t mask[4];
+};
+
+struct olsr_hna6 {
+ uint8_t network[16];
+ uint8_t mask[16];
+};
+
+
+/** gateway HNA flags */
+enum gateway_hna_flags {
+ GW_HNA_FLAG_LINKSPEED = 1 << 0,
+ GW_HNA_FLAG_IPV4 = 1 << 1,
+ GW_HNA_FLAG_IPV4_NAT = 1 << 2,
+ GW_HNA_FLAG_IPV6 = 1 << 3,
+ GW_HNA_FLAG_IPV6PREFIX = 1 << 4
+};
+
+/** gateway HNA field byte offsets in the netmask field of the HNA */
+enum gateway_hna_fields {
+ GW_HNA_PAD = 0,
+ GW_HNA_FLAGS = 1,
+ GW_HNA_UPLINK = 2,
+ GW_HNA_DOWNLINK = 3,
+ GW_HNA_V6PREFIXLEN = 4,
+ GW_HNA_V6PREFIX = 5
+};
+
+
+#define OLSR_EXTRACT_LINK_TYPE(link_code) (link_code & 0x3)
+#define OLSR_EXTRACT_NEIGHBOR_TYPE(link_code) (link_code >> 2)
+
+static const struct tok olsr_link_type_values[] = {
+ { 0, "Unspecified" },
+ { 1, "Asymmetric" },
+ { 2, "Symmetric" },
+ { 3, "Lost" },
+ { 0, NULL}
+};
+
+static const struct tok olsr_neighbor_type_values[] = {
+ { 0, "Not-Neighbor" },
+ { 1, "Symmetric" },
+ { 2, "Symmetric-MPR" },
+ { 0, NULL}
+};
+
+struct olsr_lq_neighbor4 {
+ uint8_t neighbor[4];
+ uint8_t link_quality;
+ uint8_t neighbor_link_quality;
+ uint8_t res[2];
+};
+
+struct olsr_lq_neighbor6 {
+ uint8_t neighbor[16];
+ uint8_t link_quality;
+ uint8_t neighbor_link_quality;
+ uint8_t res[2];
+};
+
+#define MAX_SMARTGW_SPEED 320000000
+
+/**
+ * Convert an encoded 1 byte transport value (5 bits mantissa, 3 bits exponent)
+ * to an uplink/downlink speed value
+ *
+ * @param value the encoded 1 byte transport value
+ * @return the uplink/downlink speed value (in kbit/s)
+ */
+static uint32_t deserialize_gw_speed(uint8_t value) {
+ uint32_t speed;
+ uint32_t exp;
+
+ if (!value) {
+ return 0;
+ }
+
+ if (value == UINT8_MAX) {
+ /* maximum value: also return maximum value */
+ return MAX_SMARTGW_SPEED;
+ }
+
+ speed = (value >> 3) + 1;
+ exp = value & 7;
+
+ while (exp-- > 0) {
+ speed *= 10;
+ }
+ return speed;
+}
+
+/*
+ * macro to convert the 8-bit mantissa/exponent to a double float
+ * 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 int
+olsr_print_lq_neighbor4(netdissect_options *ndo,
+ const u_char *msg_data, u_int hello_len)
+{
+ const struct olsr_lq_neighbor4 *lq_neighbor;
+
+ while (hello_len >= sizeof(struct olsr_lq_neighbor4)) {
+
+ lq_neighbor = (const struct olsr_lq_neighbor4 *)msg_data;
+ if (!ND_TTEST(*lq_neighbor))
+ return (-1);
+
+ ND_PRINT((ndo, "\n\t neighbor %s, link-quality %.2f%%"
+ ", neighbor-link-quality %.2f%%",
+ ipaddr_string(ndo, 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);
+ }
+ return (0);
+}
+
+static int
+olsr_print_lq_neighbor6(netdissect_options *ndo,
+ const u_char *msg_data, u_int hello_len)
+{
+ const struct olsr_lq_neighbor6 *lq_neighbor;
+
+ while (hello_len >= sizeof(struct olsr_lq_neighbor6)) {
+
+ lq_neighbor = (const struct olsr_lq_neighbor6 *)msg_data;
+ if (!ND_TTEST(*lq_neighbor))
+ return (-1);
+
+ ND_PRINT((ndo, "\n\t neighbor %s, link-quality %.2f%%"
+ ", neighbor-link-quality %.2f%%",
+ ip6addr_string(ndo, 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);
+ }
+ return (0);
+}
+
+/*
+ * print a neighbor list.
+ */
+static int
+olsr_print_neighbor(netdissect_options *ndo,
+ const u_char *msg_data, u_int hello_len)
+{
+ int neighbor;
+
+ ND_PRINT((ndo, "\n\t neighbor\n\t\t"));
+ neighbor = 1;
+
+ while (hello_len >= sizeof(struct in_addr)) {
+
+ if (!ND_TTEST2(*msg_data, sizeof(struct in_addr)))
+ return (-1);
+ /* print 4 neighbors per line */
+
+ ND_PRINT((ndo, "%s%s", ipaddr_string(ndo, msg_data),
+ neighbor % 4 == 0 ? "\n\t\t" : " "));
+
+ msg_data += sizeof(struct in_addr);
+ hello_len -= sizeof(struct in_addr);
+ }
+ return (0);
+}
+
+
+void
+olsr_print(netdissect_options *ndo,
+ const u_char *pptr, u_int length, int is_ipv6)
+{
+ union {
+ const struct olsr_common *common;
+ 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;
+ uint16_t name_entry_type, name_entry_len;
+ u_int name_entry_padding;
+ uint8_t link_type, neighbor_type;
+ const u_char *tptr, *msg_data;
+
+ tptr = pptr;
+
+ if (length < sizeof(struct olsr_common)) {
+ goto trunc;
+ }
+
+ ND_TCHECK2(*tptr, sizeof(struct olsr_common));
+
+ ptr.common = (const struct olsr_common *)tptr;
+ length = min(length, EXTRACT_16BITS(ptr.common->packet_len));
+
+ ND_PRINT((ndo, "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 (ndo->ndo_vflag < 1) {
+ return;
+ }
+
+ while (tptr < (pptr+length)) {
+ union
+ {
+ const struct olsr_msg4 *v4;
+ const struct olsr_msg6 *v6;
+ } msgptr;
+ int msg_len_valid = 0;
+
+ if (is_ipv6)
+ {
+ ND_TCHECK2(*tptr, sizeof(struct olsr_msg6));
+ msgptr.v6 = (const 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;
+ }
+
+ ND_PRINT((ndo, "\n\t%s Message (%#04x), originator %s, ttl %u, hop %u"
+ "\n\t vtime %.3fs, msg-seq 0x%04x, length %u%s",
+ tok2str(olsr_msg_values, "Unknown", msg_type),
+ msg_type, ip6addr_string(ndo, 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)" : ""));
+ if (!msg_len_valid) {
+ return;
+ }
+
+ msg_tlen = msg_len - sizeof(struct olsr_msg6);
+ msg_data = tptr + sizeof(struct olsr_msg6);
+ }
+ else /* (!is_ipv6) */
+ {
+ ND_TCHECK2(*tptr, sizeof(struct olsr_msg4));
+ msgptr.v4 = (const 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;
+ }
+
+ ND_PRINT((ndo, "\n\t%s Message (%#04x), originator %s, ttl %u, hop %u"
+ "\n\t vtime %.3fs, msg-seq 0x%04x, length %u%s",
+ tok2str(olsr_msg_values, "Unknown", msg_type),
+ msg_type, ipaddr_string(ndo, 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)" : ""));
+ if (!msg_len_valid) {
+ return;
+ }
+
+ 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:
+ if (msg_tlen < sizeof(struct olsr_hello))
+ goto trunc;
+ ND_TCHECK2(*msg_data, sizeof(struct olsr_hello));
+
+ ptr.hello = (const struct olsr_hello *)msg_data;
+ ND_PRINT((ndo, "\n\t hello-time %.3fs, MPR willingness %u",
+ 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_link)) {
+ int hello_len_valid = 0;
+
+ /*
+ * link-type.
+ */
+ ND_TCHECK2(*msg_data, sizeof(struct olsr_hello_link));
+
+ ptr.hello_link = (const struct olsr_hello_link *)msg_data;
+
+ 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);
+
+ if ((hello_len <= msg_tlen)
+ && (hello_len >= sizeof(struct olsr_hello_link)))
+ hello_len_valid = 1;
+
+ ND_PRINT((ndo, "\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_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);
+
+ ND_TCHECK2(*msg_data, hello_len);
+ if (msg_type == OLSR_HELLO_MSG) {
+ if (olsr_print_neighbor(ndo, msg_data, hello_len) == -1)
+ goto trunc;
+ } else {
+ if (is_ipv6) {
+ if (olsr_print_lq_neighbor6(ndo, msg_data, hello_len) == -1)
+ goto trunc;
+ } else {
+ if (olsr_print_lq_neighbor4(ndo, msg_data, hello_len) == -1)
+ goto trunc;
+ }
+ }
+
+ msg_data += hello_len;
+ msg_tlen -= hello_len;
+ }
+ break;
+
+ case OLSR_TC_MSG:
+ case OLSR_TC_LQ_MSG:
+ if (msg_tlen < sizeof(struct olsr_tc))
+ goto trunc;
+ ND_TCHECK2(*msg_data, sizeof(struct olsr_tc));
+
+ ptr.tc = (const struct olsr_tc *)msg_data;
+ ND_PRINT((ndo, "\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) {
+ if (olsr_print_neighbor(ndo, msg_data, msg_tlen) == -1)
+ goto trunc;
+ } else {
+ if (is_ipv6) {
+ if (olsr_print_lq_neighbor6(ndo, msg_data, msg_tlen) == -1)
+ goto trunc;
+ } else {
+ if (olsr_print_lq_neighbor4(ndo, msg_data, msg_tlen) == -1)
+ goto trunc;
+ }
+ }
+ break;
+
+ case OLSR_MID_MSG:
+ {
+ size_t addr_size = sizeof(struct in_addr);
+
+ if (is_ipv6)
+ addr_size = sizeof(struct in6_addr);
+
+ while (msg_tlen >= addr_size) {
+ ND_TCHECK2(*msg_data, addr_size);
+ ND_PRINT((ndo, "\n\t interface address %s",
+ is_ipv6 ? ip6addr_string(ndo, msg_data) :
+ ipaddr_string(ndo, msg_data)));
+
+ msg_data += addr_size;
+ msg_tlen -= addr_size;
+ }
+ break;
+ }
+
+ case OLSR_HNA_MSG:
+ if (is_ipv6)
+ {
+ int i = 0;
+
+ ND_PRINT((ndo, "\n\t Advertised networks (total %u)",
+ (unsigned int) (msg_tlen / sizeof(struct olsr_hna6))));
+
+ while (msg_tlen >= sizeof(struct olsr_hna6)) {
+ const struct olsr_hna6 *hna6;
+
+ ND_TCHECK2(*msg_data, sizeof(struct olsr_hna6));
+
+ hna6 = (const struct olsr_hna6 *)msg_data;
+
+ ND_PRINT((ndo, "\n\t #%i: %s/%u",
+ i, ip6addr_string(ndo, hna6->network),
+ mask62plen (hna6->mask)));
+
+ msg_data += sizeof(struct olsr_hna6);
+ msg_tlen -= sizeof(struct olsr_hna6);
+ }
+ }
+ else
+ {
+ int col = 0;
+
+ ND_PRINT((ndo, "\n\t Advertised networks (total %u)",
+ (unsigned int) (msg_tlen / sizeof(struct olsr_hna4))));
+
+ while (msg_tlen >= sizeof(struct olsr_hna4)) {
+ ND_TCHECK2(*msg_data, sizeof(struct olsr_hna4));
+
+ ptr.hna = (const struct olsr_hna4 *)msg_data;
+
+ /* print 4 prefixes per line */
+ if (!ptr.hna->network[0] && !ptr.hna->network[1] &&
+ !ptr.hna->network[2] && !ptr.hna->network[3] &&
+ !ptr.hna->mask[GW_HNA_PAD] &&
+ ptr.hna->mask[GW_HNA_FLAGS]) {
+ /* smart gateway */
+ ND_PRINT((ndo, "%sSmart-Gateway:%s%s%s%s%s %u/%u",
+ col == 0 ? "\n\t " : ", ", /* indent */
+ /* sgw */
+ /* LINKSPEED */
+ (ptr.hna->mask[GW_HNA_FLAGS] &
+ GW_HNA_FLAG_LINKSPEED) ? " LINKSPEED" : "",
+ /* IPV4 */
+ (ptr.hna->mask[GW_HNA_FLAGS] &
+ GW_HNA_FLAG_IPV4) ? " IPV4" : "",
+ /* IPV4-NAT */
+ (ptr.hna->mask[GW_HNA_FLAGS] &
+ GW_HNA_FLAG_IPV4_NAT) ? " IPV4-NAT" : "",
+ /* IPV6 */
+ (ptr.hna->mask[GW_HNA_FLAGS] &
+ GW_HNA_FLAG_IPV6) ? " IPV6" : "",
+ /* IPv6PREFIX */
+ (ptr.hna->mask[GW_HNA_FLAGS] &
+ GW_HNA_FLAG_IPV6PREFIX) ? " IPv6-PREFIX" : "",
+ /* uplink */
+ (ptr.hna->mask[GW_HNA_FLAGS] &
+ GW_HNA_FLAG_LINKSPEED) ?
+ deserialize_gw_speed(ptr.hna->mask[GW_HNA_UPLINK]) : 0,
+ /* downlink */
+ (ptr.hna->mask[GW_HNA_FLAGS] &
+ GW_HNA_FLAG_LINKSPEED) ?
+ deserialize_gw_speed(ptr.hna->mask[GW_HNA_DOWNLINK]) : 0
+ ));
+ } else {
+ /* normal route */
+ ND_PRINT((ndo, "%s%s/%u",
+ col == 0 ? "\n\t " : ", ",
+ ipaddr_string(ndo, ptr.hna->network),
+ mask2plen(EXTRACT_32BITS(ptr.hna->mask))));
+ }
+
+ msg_data += sizeof(struct olsr_hna4);
+ msg_tlen -= sizeof(struct olsr_hna4);
+
+ col = (col + 1) % 4;
+ }
+ }
+ break;
+
+ case OLSR_NAMESERVICE_MSG:
+ {
+ u_int name_entries;
+ u_int addr_size;
+ int name_entries_valid;
+ u_int i;
+
+ if (msg_tlen < 4)
+ goto trunc;
+ ND_TCHECK2(*msg_data, 4);
+
+ name_entries = EXTRACT_16BITS(msg_data+2);
+ addr_size = 4;
+ if (is_ipv6)
+ addr_size = 16;
+
+ name_entries_valid = 0;
+ if ((name_entries > 0)
+ && ((name_entries * (4 + addr_size)) <= msg_tlen))
+ name_entries_valid = 1;
+
+ ND_PRINT((ndo, "\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;
+ ND_TCHECK2(*msg_data, 4);
+
+ 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;
+
+ ND_PRINT((ndo, "\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;
+
+ ND_TCHECK2(*msg_data, addr_size + name_entry_len + name_entry_padding);
+
+ if (is_ipv6)
+ ND_PRINT((ndo, ", address %s, name \"",
+ ip6addr_string(ndo, msg_data)));
+ else
+ ND_PRINT((ndo, ", address %s, name \"",
+ ipaddr_string(ndo, msg_data)));
+ (void)fn_printn(ndo, msg_data + addr_size, name_entry_len, NULL);
+ ND_PRINT((ndo, "\""));
+
+ 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_POWERINFO_MSG:
+ default:
+ print_unknown_data(ndo, msg_data, "\n\t ", msg_tlen);
+ break;
+ } /* switch (msg_type) */
+ tptr += msg_len;
+ } /* while (tptr < (pptr+length)) */
+
+ return;
+
+ trunc:
+ ND_PRINT((ndo, "[|olsr]"));
+}
+
+/*
+ * Local Variables:
+ * c-style: whitesmith
+ * c-basic-offset: 4
+ * End:
+ */
generated by cgit v1.3 (git 2.53.0) at 2026-04-23 00:12:42 +0000