bgp: Parse BGP extended message support capability

[tcpdump] / print-nflog.c

diff --git a/print-nflog.c b/print-nflog.c
index 63cdbc9a07219b4807ef8ef586f2a119fd02fd69..1e75561b967dc01b60e62e3af432f246ae5696b4 100644 (file)
--- a/print-nflog.c
+++ b/print-nflog.c
@@ -40,7 +40,7 @@
 
 /*
  * Structure of an NFLOG header and TLV parts, as described at
- * http://www.tcpdump.org/linktypes/LINKTYPE_NFLOG.html
+ * https://www.tcpdump.org/linktypes/LINKTYPE_NFLOG.html
  *
  * The NFLOG header is big-endian.
  *
@@ -55,12 +55,16 @@ typedef struct nflog_hdr {
        nd_uint16_t     nflog_rid;              /* resource ID */
 } nflog_hdr_t;
 
+#define NFLOG_HDR_LEN sizeof(nflog_hdr_t)
+
 typedef struct nflog_tlv {
        nd_uint16_t     tlv_length;             /* tlv length */
        nd_uint16_t     tlv_type;               /* tlv type */
        /* value follows this */
 } nflog_tlv_t;
 
+#define NFLOG_TLV_LEN sizeof(nflog_tlv_t)
+
 typedef struct nflog_packet_hdr {
        nd_uint16_t     hw_protocol;    /* hw protocol */
        nd_uint8_t      hook;           /* netfilter hook */
@@ -101,9 +105,7 @@ typedef struct nflog_timestamp {
 
 static const struct tok nflog_values[] = {
        { AF_INET,              "IPv4" },
-#ifdef AF_INET6
        { AF_INET6,             "IPv6" },
-#endif /*AF_INET6*/
        { 0,                    NULL }
 };
 
@@ -111,81 +113,85 @@ static void
 nflog_hdr_print(netdissect_options *ndo, const nflog_hdr_t *hdr, u_int length)
 {
        ND_PRINT("version %u, resource ID %u",
-           EXTRACT_U_1(hdr->nflog_version), EXTRACT_BE_U_2(hdr->nflog_rid));
+           GET_U_1(hdr->nflog_version), GET_BE_U_2(hdr->nflog_rid));
 
        if (!ndo->ndo_qflag) {
                ND_PRINT(", family %s (%u)",
                         tok2str(nflog_values, "Unknown",
-                                EXTRACT_U_1(hdr->nflog_family)),
-                        EXTRACT_U_1(hdr->nflog_family));
+                                GET_U_1(hdr->nflog_family)),
+                        GET_U_1(hdr->nflog_family));
                } else {
                ND_PRINT(", %s",
                         tok2str(nflog_values,
                                 "Unknown NFLOG (0x%02x)",
-                        EXTRACT_U_1(hdr->nflog_family)));
+                        GET_U_1(hdr->nflog_family)));
                }
 
        ND_PRINT(", length %u: ", length);
 }
 
-u_int
+void
 nflog_if_print(netdissect_options *ndo,
-                          const struct pcap_pkthdr *h, const u_char *p)
+              const struct pcap_pkthdr *h, const u_char *p)
 {
        const nflog_hdr_t *hdr = (const nflog_hdr_t *)p;
        uint16_t size;
-       uint16_t h_size = sizeof(nflog_hdr_t);
+       uint16_t h_size = NFLOG_HDR_LEN;
        u_int caplen = h->caplen;
        u_int length = h->len;
 
-       ndo->ndo_protocol = "nflog_if";
-       if (caplen < sizeof(nflog_hdr_t) || length < sizeof(nflog_hdr_t))
-               goto trunc;
+       ndo->ndo_protocol = "nflog";
+       if (caplen < NFLOG_HDR_LEN) {
+               nd_print_trunc(ndo);
+               ndo->ndo_ll_hdr_len += caplen;
+               return;
+       }
+       ndo->ndo_ll_hdr_len += NFLOG_HDR_LEN;
 
        ND_TCHECK_SIZE(hdr);
-       if (EXTRACT_U_1(hdr->nflog_version) != 0) {
-               ND_PRINT("version %u (unknown)", EXTRACT_U_1(hdr->nflog_version));
-               return h_size;
+       if (GET_U_1(hdr->nflog_version) != 0) {
+               ND_PRINT("version %u (unknown)", GET_U_1(hdr->nflog_version));
+               return;
        }
 
        if (ndo->ndo_eflag)
                nflog_hdr_print(ndo, hdr, length);
 
-       p += sizeof(nflog_hdr_t);
-       length -= sizeof(nflog_hdr_t);
-       caplen -= sizeof(nflog_hdr_t);
+       p += NFLOG_HDR_LEN;
+       length -= NFLOG_HDR_LEN;
+       caplen -= NFLOG_HDR_LEN;
 
        while (length > 0) {
                const nflog_tlv_t *tlv;
 
                /* We have some data.  Do we have enough for the TLV header? */
-               if (caplen < sizeof(nflog_tlv_t) || length < sizeof(nflog_tlv_t))
+               if (caplen < NFLOG_TLV_LEN)
                        goto trunc;     /* No. */
 
                tlv = (const nflog_tlv_t *) p;
                ND_TCHECK_SIZE(tlv);
-               size = EXTRACT_HE_U_2(tlv->tlv_length);
+               size = GET_HE_U_2(tlv->tlv_length);
                if (size % 4 != 0)
                        size += 4 - size % 4;
 
                /* Is the TLV's length less than the minimum? */
-               if (size < sizeof(nflog_tlv_t))
+               if (size < NFLOG_TLV_LEN)
                        goto trunc;     /* Yes. Give up now. */
 
                /* Do we have enough data for the full TLV? */
-               if (caplen < size || length < size)
+               if (caplen < size)
                        goto trunc;     /* No. */
 
-               if (EXTRACT_HE_U_2(tlv->tlv_type) == NFULA_PAYLOAD) {
+               if (GET_HE_U_2(tlv->tlv_type) == NFULA_PAYLOAD) {
                        /*
                         * This TLV's data is the packet payload.
                         * Skip past the TLV header, and break out
                         * of the loop so we print the packet data.
                         */
-                       p += sizeof(nflog_tlv_t);
-                       h_size += sizeof(nflog_tlv_t);
-                       length -= sizeof(nflog_tlv_t);
-                       caplen -= sizeof(nflog_tlv_t);
+                       p += NFLOG_TLV_LEN;
+                       h_size += NFLOG_TLV_LEN;
+                       length -= NFLOG_TLV_LEN;
+                       caplen -= NFLOG_TLV_LEN;
                        break;
                }
 
@@ -195,32 +201,31 @@ nflog_if_print(netdissect_options *ndo,
                caplen -= size;
        }
 
-       switch (EXTRACT_U_1(hdr->nflog_family)) {
+       switch (GET_U_1(hdr->nflog_family)) {
 
        case AF_INET:
                ip_print(ndo, p, length);
                break;
 
-#ifdef AF_INET6
        case AF_INET6:
                ip6_print(ndo, p, length);
                break;
-#endif /* AF_INET6 */
 
        default:
                if (!ndo->ndo_eflag)
                        nflog_hdr_print(ndo, hdr,
-                               length + sizeof(nflog_hdr_t));
+                                       length + NFLOG_HDR_LEN);
 
                if (!ndo->ndo_suppress_default_print)
                        ND_DEFAULTPRINT(p, caplen);
                break;
        }
 
-       return h_size;
+       ndo->ndo_ll_hdr_len += h_size - NFLOG_HDR_LEN;
+       return;
 trunc:
        nd_print_trunc(ndo);
-       return h_size;
+       ndo->ndo_ll_hdr_len += h_size - NFLOG_HDR_LEN;
 }
 
-#endif /* defined(DLT_NFLOG) && defined(HAVE_PCAP_NFLOG_H) */
+#endif /* DLT_NFLOG */