#include "netdissect-stdinc.h"
+#define ND_LONGJMP_FROM_TCHECK
#include "netdissect.h"
#include "extract.h"
#include "openflow.h"
#include "oui.h"
-#define OF_VER_1_0 0x01
+static const struct tok ofver_str[] = {
+ { OF_VER_1_0, "1.0" },
+ { OF_VER_1_1, "1.1" },
+ { OF_VER_1_2, "1.2" },
+ { OF_VER_1_3, "1.3" },
+ { OF_VER_1_4, "1.4" },
+ { OF_VER_1_5, "1.5" },
+ { 0, NULL }
+};
const struct tok onf_exp_str[] = {
{ ONF_EXP_ONF, "ONF Extensions" },
{ ONF_EXP_WMOB, "Wireless and Mobility Extensions" },
{ ONF_EXP_FABS, "Forwarding Abstractions Extensions" },
{ ONF_EXP_OTRANS, "Optical Transport Extensions" },
+ { ONF_EXP_NBLNCTU, "Network Benchmarking Lab, NCTU" },
+ { ONF_EXP_MPCE, "Mobile Packet Core Extensions" },
+ { ONF_EXP_MPLSTPSPTN, "MPLS-TP OpenFlow Extensions for SPTN" },
{ 0, NULL }
};
return tok2str(table, "unknown", vendor);
}
+void
+of_bitmap_print(netdissect_options *ndo,
+ const struct tok *t, const uint32_t v, const uint32_t u)
+{
+ /* Assigned bits? */
+ if (v & ~u)
+ ND_PRINT(" (%s)", bittok2str(t, "", v));
+ /* Unassigned bits? */
+ if (v & u)
+ ND_PRINT(" (bogus)");
+}
+
+void
+of_data_print(netdissect_options *ndo,
+ const u_char *cp, const u_int len)
+{
+ if (len == 0)
+ return;
+ /* data */
+ ND_PRINT("\n\t data (%u octets)", len);
+ if (ndo->ndo_vflag >= 2)
+ hex_and_ascii_print(ndo, "\n\t ", cp, len);
+ else
+ ND_TCHECK_LEN(cp, len);
+}
+
static void
-of_header_print(netdissect_options *ndo, const uint8_t version, const uint8_t type,
- const uint16_t length, const uint32_t xid)
+of_message_print(netdissect_options *ndo,
+ const u_char *cp, uint16_t len,
+ const struct of_msgtypeinfo *mti)
{
- ND_PRINT("\n\tversion unknown (0x%02x), type 0x%02x, length %u, xid 0x%08x",
- version, type, length, xid);
+ /*
+ * Here "cp" and "len" stand for the message part beyond the common
+ * OpenFlow 1.0 header, if any.
+ *
+ * Most message types are longer than just the header, and the length
+ * constraints may be complex. When possible, validate the constraint
+ * completely here (REQ_FIXLEN), otherwise check that the message is
+ * long enough to begin the decoding (REQ_MINLEN) and have the
+ * type-specific function do any remaining validation.
+ */
+
+ if (!mti)
+ goto tcheck_remainder;
+
+ if ((mti->req_what == REQ_FIXLEN && len != mti->req_value) ||
+ (mti->req_what == REQ_MINLEN && len < mti->req_value))
+ goto invalid;
+
+ if (!ndo->ndo_vflag || !mti->decoder)
+ goto tcheck_remainder;
+
+ mti->decoder(ndo, cp, len);
+ return;
+
+invalid:
+ nd_print_invalid(ndo);
+tcheck_remainder:
+ ND_TCHECK_LEN(cp, len);
}
/* Print a TCP segment worth of OpenFlow messages presuming the segment begins
/* Print a single OpenFlow message. */
uint8_t version, type;
uint16_t length;
- uint32_t xid;
+ const struct of_msgtypeinfo *mti;
- if (len < OF_HEADER_FIXLEN)
- goto invalid;
/* version */
version = GET_U_1(cp);
OF_FWD(1);
+ ND_PRINT("\n\tversion %s",
+ tok2str(ofver_str, "unknown (0x%02x)", version));
/* type */
+ if (len < 1)
+ goto partial_header;
type = GET_U_1(cp);
OF_FWD(1);
+ mti =
+ version == OF_VER_1_0 ? of10_identify_msgtype(type) :
+ version == OF_VER_1_3 ? of13_identify_msgtype(type) :
+ NULL;
+ if (mti && mti->name)
+ ND_PRINT(", type %s", mti->name);
+ else
+ ND_PRINT(", type unknown (0x%02x)", type);
/* length */
+ if (len < 2)
+ goto partial_header;
length = GET_BE_U_2(cp);
OF_FWD(2);
+ ND_PRINT(", length %u%s", length,
+ length < OF_HEADER_FIXLEN ? " (too short!)" : "");
/* xid */
- xid = GET_BE_U_4(cp);
+ if (len < 4)
+ goto partial_header;
+ ND_PRINT(", xid 0x%08x", GET_BE_U_4(cp));
OF_FWD(4);
+
/*
* When a TCP packet can contain several protocol messages,
* and at the same time a protocol message can span several
* the captured packet buffer end, but stay safe even when
* that's somehow not the case.)
*/
- if (length < OF_HEADER_FIXLEN) {
- of_header_print(ndo, version, type, length, xid);
+ if (length < OF_HEADER_FIXLEN)
goto invalid;
- }
- /*
- * Decode known protocol versions further without printing the
- * header (the type decoding is version-specific).
- */
- switch (version) {
- case OF_VER_1_0:
- of10_header_body_print(ndo, cp, type,
- length - OF_HEADER_FIXLEN, xid);
- break;
- default:
- of_header_print(ndo, version, type, length, xid);
- ND_TCHECK_LEN(cp, length - OF_HEADER_FIXLEN);
- }
+
+ of_message_print(ndo, cp, length - OF_HEADER_FIXLEN, mti);
if (length - OF_HEADER_FIXLEN > len)
break;
OF_FWD(length - OF_HEADER_FIXLEN);
} /* while (len) */
return;
+partial_header:
+ ND_PRINT(" (end of TCP payload)");
+ ND_TCHECK_LEN(cp, len);
+ return;
invalid: /* fail the current packet */
nd_print_invalid(ndo);
ND_TCHECK_LEN(cp, len);
- return;
-trunc:
- nd_trunc(ndo);
}
projects / tcpdump / blobdiff