C++ (Cpp) geneve_opts_printの例

コード例 #1

ファイル: print-geneve.c プロジェクト: fenner/tcpdump

void
geneve_print(netdissect_options *ndo, const u_char *bp, u_int len)
{
    uint8_t ver_opt;
    u_int version;
    uint8_t flags;
    uint16_t prot;
    uint32_t vni;
    uint8_t reserved;
    u_int opts_len;

    ndo->ndo_protocol = "geneve";
    ND_PRINT("Geneve");

    ND_TCHECK_8(bp);

    ver_opt = GET_U_1(bp);
    bp += 1;
    len -= 1;

    version = ver_opt >> VER_SHIFT;
    if (version != 0) {
        ND_PRINT(" ERROR: unknown-version %u", version);
        return;
    }

    flags = GET_U_1(bp);
    bp += 1;
    len -= 1;

    prot = GET_BE_U_2(bp);
    bp += 2;
    len -= 2;

    vni = GET_BE_U_3(bp);
    bp += 3;
    len -= 3;

    reserved = GET_U_1(bp);
    bp += 1;
    len -= 1;

    ND_PRINT(", Flags [%s]",
              bittok2str_nosep(geneve_flag_values, "none", flags));
    ND_PRINT(", vni 0x%x", vni);

    if (reserved)
        ND_PRINT(", rsvd 0x%x", reserved);

    if (ndo->ndo_eflag)
        ND_PRINT(", proto %s (0x%04x)",
                  tok2str(ethertype_values, "unknown", prot), prot);

    opts_len = (ver_opt & HDR_OPTS_LEN_MASK) * 4;

    if (len < opts_len) {
        ND_PRINT(" truncated-geneve - %u bytes missing",
                  opts_len - len);
        return;
    }

    ND_TCHECK_LEN(bp, opts_len);

    if (opts_len > 0) {
        ND_PRINT(", options [");

        if (ndo->ndo_vflag)
            geneve_opts_print(ndo, bp, opts_len);
        else
            ND_PRINT("%u bytes", opts_len);

        ND_PRINT("]");
    }

    bp += opts_len;
    len -= opts_len;

    if (ndo->ndo_vflag < 1)
        ND_PRINT(": ");
    else
        ND_PRINT("\n\t");

    if (ethertype_print(ndo, prot, bp, len, ND_BYTES_AVAILABLE_AFTER(bp), NULL, NULL) == 0) {
        if (prot == ETHERTYPE_TEB)
            ether_print(ndo, bp, len, ND_BYTES_AVAILABLE_AFTER(bp), NULL, NULL);
        else
            ND_PRINT("geneve-proto-0x%x", prot);
    }

    return;

trunc:
    nd_print_trunc(ndo);
}

コード例 #2

ファイル: print-geneve.c プロジェクト: LXiong/tcpdump

void
geneve_print(netdissect_options *ndo, const u_char *bp, u_int len)
{
    uint8_t ver_opt;
    u_int version;
    uint8_t flags;
    uint16_t prot;
    uint32_t vni;
    uint8_t reserved;
    u_int opts_len;

    ND_PRINT((ndo, "Geneve"));

    ND_TCHECK2(*bp, 8);

    ver_opt = *bp;
    bp += 1;
    len -= 1;

    version = ver_opt >> VER_SHIFT;
    if (version != 0) {
        ND_PRINT((ndo, " ERROR: unknown-version %u", version));
        return;
    }

    flags = *bp;
    bp += 1;
    len -= 1;

    prot = EXTRACT_16BITS(bp);
    bp += 2;
    len -= 2;

    vni = EXTRACT_24BITS(bp);
    bp += 3;
    len -= 3;

    reserved = *bp;
    bp += 1;
    len -= 1;

    ND_PRINT((ndo, ", Flags [%s]",
              bittok2str_nosep(geneve_flag_values, "none", flags)));
    ND_PRINT((ndo, ", vni 0x%x", vni));

    if (reserved)
        ND_PRINT((ndo, ", rsvd 0x%x", reserved));

    if (ndo->ndo_eflag)
        ND_PRINT((ndo, ", proto %s (0x%04x)",
                  tok2str(ethertype_values, "unknown", prot), prot));

    opts_len = (ver_opt & HDR_OPTS_LEN_MASK) * 4;

    if (len < opts_len) {
        ND_PRINT((ndo, " truncated-geneve - %u bytes missing",
                  opts_len - len));
        return;
    }

    ND_TCHECK2(*bp, opts_len);

    if (opts_len > 0) {
        ND_PRINT((ndo, ", options ["));

        if (ndo->ndo_vflag)
            geneve_opts_print(ndo, bp, opts_len);
        else
            ND_PRINT((ndo, "%u bytes", opts_len));

        ND_PRINT((ndo, "]"));
    }

    bp += opts_len;
    len -= opts_len;

    if (ndo->ndo_vflag < 1)
        ND_PRINT((ndo, ": "));
    else
        ND_PRINT((ndo, "\n\t"));

    if (ethertype_print(ndo, prot, bp, len, len) == 0) {
        if (prot == ETHERTYPE_TEB)
            ether_print(ndo, bp, len, len, NULL, NULL);
        else
            ND_PRINT((ndo, "geneve-proto-0x%x", prot));
    }

    return;

trunc:
    ND_PRINT((ndo, " [|geneve]"));
}