* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
-#define NETDISSECT_REWORKED
+/* \summary: Distance Vector Multicast Routing Protocol printer */
+
#ifdef HAVE_CONFIG_H
-#include "config.h"
+#include <config.h>
#endif
-#include <tcpdump-stdinc.h>
+#include "netdissect-stdinc.h"
-#include "interface.h"
+#include "netdissect.h"
#include "extract.h"
#include "addrtoname.h"
/*
+ * See: RFC 1075 and draft-ietf-idmr-dvmrp-v3
+ *
* DVMRP message types and flag values shamelessly stolen from
* mrouted/dvmrp.h.
*/
static int print_probe(netdissect_options *, const u_char *, const u_char *, u_int);
static int print_report(netdissect_options *, const u_char *, const u_char *, u_int);
static int print_neighbors(netdissect_options *, const u_char *, const u_char *, u_int);
-static int print_neighbors2(netdissect_options *, const u_char *, const u_char *, u_int);
+static int print_neighbors2(netdissect_options *, const u_char *, const u_char *, u_int, uint8_t, uint8_t);
static int print_prune(netdissect_options *, const u_char *);
static int print_graft(netdissect_options *, const u_char *);
static int print_graft_ack(netdissect_options *, const u_char *);
-static uint32_t target_level;
-
void
dvmrp_print(netdissect_options *ndo,
- register const u_char *bp, register u_int len)
+ const u_char *bp, u_int len)
{
- register const u_char *ep;
- register u_char type;
+ const u_char *ep;
+ u_char type;
+ uint8_t major_version, minor_version;
- ep = (const u_char *)ndo->ndo_snapend;
+ ndo->ndo_protocol = "dvmrp";
+ ep = ndo->ndo_snapend;
if (bp >= ep)
return;
- ND_TCHECK(bp[1]);
- type = bp[1];
+ ND_TCHECK_1(bp + 1);
+ type = GET_U_1(bp + 1);
/* Skip IGMP header */
bp += 8;
switch (type) {
case DVMRP_PROBE:
- ND_PRINT((ndo, " Probe"));
+ ND_PRINT(" Probe");
if (ndo->ndo_vflag) {
if (print_probe(ndo, bp, ep, len) < 0)
goto trunc;
break;
case DVMRP_REPORT:
- ND_PRINT((ndo, " Report"));
+ ND_PRINT(" Report");
if (ndo->ndo_vflag > 1) {
if (print_report(ndo, bp, ep, len) < 0)
goto trunc;
break;
case DVMRP_ASK_NEIGHBORS:
- ND_PRINT((ndo, " Ask-neighbors(old)"));
+ ND_PRINT(" Ask-neighbors(old)");
break;
case DVMRP_NEIGHBORS:
- ND_PRINT((ndo, " Neighbors(old)"));
+ ND_PRINT(" Neighbors(old)");
if (print_neighbors(ndo, bp, ep, len) < 0)
goto trunc;
break;
case DVMRP_ASK_NEIGHBORS2:
- ND_PRINT((ndo, " Ask-neighbors2"));
+ ND_PRINT(" Ask-neighbors2");
break;
case DVMRP_NEIGHBORS2:
- ND_PRINT((ndo, " Neighbors2"));
+ ND_PRINT(" Neighbors2");
/*
- * extract version and capabilities from IGMP group
- * address field
+ * extract version from IGMP group address field
*/
bp -= 4;
- ND_TCHECK2(bp[0], 4);
- target_level = (bp[0] << 24) | (bp[1] << 16) |
- (bp[2] << 8) | bp[3];
+ ND_TCHECK_4(bp);
+ major_version = GET_U_1(bp + 3);
+ minor_version = GET_U_1(bp + 2);
bp += 4;
- if (print_neighbors2(ndo, bp, ep, len) < 0)
+ if (print_neighbors2(ndo, bp, ep, len, major_version,
+ minor_version) < 0)
goto trunc;
break;
case DVMRP_PRUNE:
- ND_PRINT((ndo, " Prune"));
+ ND_PRINT(" Prune");
if (print_prune(ndo, bp) < 0)
goto trunc;
break;
case DVMRP_GRAFT:
- ND_PRINT((ndo, " Graft"));
+ ND_PRINT(" Graft");
if (print_graft(ndo, bp) < 0)
goto trunc;
break;
case DVMRP_GRAFT_ACK:
- ND_PRINT((ndo, " Graft-ACK"));
+ ND_PRINT(" Graft-ACK");
if (print_graft_ack(ndo, bp) < 0)
goto trunc;
break;
default:
- ND_PRINT((ndo, " [type %d]", type));
+ ND_PRINT(" [type %u]", type);
break;
}
return;
trunc:
- ND_PRINT((ndo, "[|dvmrp]"));
+ nd_print_trunc(ndo);
return;
}
static int
print_report(netdissect_options *ndo,
- register const u_char *bp, register const u_char *ep,
- register u_int len)
+ const u_char *bp, const u_char *ep,
+ u_int len)
{
- register uint32_t mask, origin;
- register int metric, done;
- register u_int i, width;
+ uint32_t mask, origin;
+ u_int metric, done;
+ u_int i, width;
while (len > 0) {
if (len < 3) {
- ND_PRINT((ndo, " [|]"));
+ ND_PRINT(" [|]");
return (0);
}
- ND_TCHECK2(bp[0], 3);
- mask = (uint32_t)0xff << 24 | bp[0] << 16 | bp[1] << 8 | bp[2];
+ ND_TCHECK_3(bp);
+ mask = (uint32_t)0xff << 24 | GET_U_1(bp) << 16 |
+ GET_U_1(bp + 1) << 8 | GET_U_1(bp + 2);
width = 1;
- if (bp[0])
+ if (GET_U_1(bp))
width = 2;
- if (bp[1])
+ if (GET_U_1(bp + 1))
width = 3;
- if (bp[2])
+ if (GET_U_1(bp + 2))
width = 4;
- ND_PRINT((ndo, "\n\tMask %s", intoa(htonl(mask))));
+ ND_PRINT("\n\tMask %s", intoa(htonl(mask)));
bp += 3;
len -= 3;
do {
if (bp + width + 1 > ep) {
- ND_PRINT((ndo, " [|]"));
+ ND_PRINT(" [|]");
return (0);
}
if (len < width + 1) {
- ND_PRINT((ndo, "\n\t [Truncated Report]"));
+ ND_PRINT("\n\t [Truncated Report]");
return (0);
}
origin = 0;
for (i = 0; i < width; ++i) {
- ND_TCHECK(*bp);
- origin = origin << 8 | *bp++;
+ ND_TCHECK_1(bp);
+ origin = origin << 8 | GET_U_1(bp);
+ bp++;
}
for ( ; i < 4; ++i)
origin <<= 8;
- ND_TCHECK(*bp);
- metric = *bp++;
+ ND_TCHECK_1(bp);
+ metric = GET_U_1(bp);
+ bp++;
done = metric & 0x80;
metric &= 0x7f;
- ND_PRINT((ndo, "\n\t %s metric %d", intoa(htonl(origin)),
- metric));
+ ND_PRINT("\n\t %s metric %u", intoa(htonl(origin)),
+ metric);
len -= width + 1;
} while (!done);
}
static int
print_probe(netdissect_options *ndo,
- register const u_char *bp, register const u_char *ep,
- register u_int len)
+ const u_char *bp, const u_char *ep,
+ u_int len)
{
- register uint32_t genid;
+ uint32_t genid;
- ND_TCHECK2(bp[0], 4);
+ ND_TCHECK_4(bp);
if ((len < 4) || ((bp + 4) > ep)) {
/* { (ctags) */
- ND_PRINT((ndo, " [|}"));
+ ND_PRINT(" [|}");
return (0);
}
- genid = (bp[0] << 24) | (bp[1] << 16) | (bp[2] << 8) | bp[3];
+ genid = GET_BE_U_4(bp);
bp += 4;
len -= 4;
- ND_PRINT((ndo, ndo->ndo_vflag > 1 ? "\n\t" : " "));
- ND_PRINT((ndo, "genid %u", genid));
+ ND_PRINT(ndo->ndo_vflag > 1 ? "\n\t" : " ");
+ ND_PRINT("genid %u", genid);
if (ndo->ndo_vflag < 2)
return (0);
while ((len > 0) && (bp < ep)) {
- ND_TCHECK2(bp[0], 4);
- ND_PRINT((ndo, "\n\tneighbor %s", ipaddr_string(ndo, bp)));
+ ND_TCHECK_4(bp);
+ ND_PRINT("\n\tneighbor %s", ipaddr_string(ndo, bp));
bp += 4; len -= 4;
}
return (0);
static int
print_neighbors(netdissect_options *ndo,
- register const u_char *bp, register const u_char *ep,
- register u_int len)
+ const u_char *bp, const u_char *ep,
+ u_int len)
{
const u_char *laddr;
- register u_char metric;
- register u_char thresh;
- register int ncount;
+ u_char metric;
+ u_char thresh;
+ int ncount;
while (len > 0 && bp < ep) {
- ND_TCHECK2(bp[0], 7);
+ ND_TCHECK_7(bp);
laddr = bp;
bp += 4;
- metric = *bp++;
- thresh = *bp++;
- ncount = *bp++;
+ metric = GET_U_1(bp);
+ bp++;
+ thresh = GET_U_1(bp);
+ bp++;
+ ncount = GET_U_1(bp);
+ bp++;
len -= 7;
while (--ncount >= 0) {
- ND_TCHECK2(bp[0], 4);
- ND_PRINT((ndo, " [%s ->", ipaddr_string(ndo, laddr)));
- ND_PRINT((ndo, " %s, (%d/%d)]",
- ipaddr_string(ndo, bp), metric, thresh));
+ ND_TCHECK_4(bp);
+ ND_PRINT(" [%s ->", ipaddr_string(ndo, laddr));
+ ND_PRINT(" %s, (%u/%u)]",
+ ipaddr_string(ndo, bp), metric, thresh);
bp += 4;
len -= 4;
}
static int
print_neighbors2(netdissect_options *ndo,
- register const u_char *bp, register const u_char *ep,
- register u_int len)
+ const u_char *bp, const u_char *ep,
+ u_int len, uint8_t major_version,
+ uint8_t minor_version)
{
const u_char *laddr;
- register u_char metric, thresh, flags;
- register int ncount;
+ u_char metric, thresh, flags;
+ int ncount;
- ND_PRINT((ndo, " (v %d.%d):",
- (int)target_level & 0xff,
- (int)(target_level >> 8) & 0xff));
+ ND_PRINT(" (v %u.%u):", major_version, minor_version);
while (len > 0 && bp < ep) {
- ND_TCHECK2(bp[0], 8);
+ ND_TCHECK_8(bp);
laddr = bp;
bp += 4;
- metric = *bp++;
- thresh = *bp++;
- flags = *bp++;
- ncount = *bp++;
+ metric = GET_U_1(bp);
+ bp++;
+ thresh = GET_U_1(bp);
+ bp++;
+ flags = GET_U_1(bp);
+ bp++;
+ ncount = GET_U_1(bp);
+ bp++;
len -= 8;
while (--ncount >= 0 && (len >= 4) && (bp + 4) <= ep) {
- ND_PRINT((ndo, " [%s -> ", ipaddr_string(ndo, laddr)));
- ND_PRINT((ndo, "%s (%d/%d", ipaddr_string(ndo, bp),
- metric, thresh));
+ ND_PRINT(" [%s -> ", ipaddr_string(ndo, laddr));
+ ND_PRINT("%s (%u/%u", ipaddr_string(ndo, bp),
+ metric, thresh);
if (flags & DVMRP_NF_TUNNEL)
- ND_PRINT((ndo, "/tunnel"));
+ ND_PRINT("/tunnel");
if (flags & DVMRP_NF_SRCRT)
- ND_PRINT((ndo, "/srcrt"));
+ ND_PRINT("/srcrt");
if (flags & DVMRP_NF_QUERIER)
- ND_PRINT((ndo, "/querier"));
+ ND_PRINT("/querier");
if (flags & DVMRP_NF_DISABLED)
- ND_PRINT((ndo, "/disabled"));
+ ND_PRINT("/disabled");
if (flags & DVMRP_NF_DOWN)
- ND_PRINT((ndo, "/down"));
- ND_PRINT((ndo, ")]"));
+ ND_PRINT("/down");
+ ND_PRINT(")]");
bp += 4;
len -= 4;
}
if (ncount != -1) {
- ND_PRINT((ndo, " [|]"));
+ ND_PRINT(" [|]");
return (0);
}
}
static int
print_prune(netdissect_options *ndo,
- register const u_char *bp)
+ const u_char *bp)
{
- ND_TCHECK2(bp[0], 12);
- ND_PRINT((ndo, " src %s grp %s", ipaddr_string(ndo, bp), ipaddr_string(ndo, bp + 4)));
+ ND_TCHECK_LEN(bp, 12);
+ ND_PRINT(" src %s grp %s", ipaddr_string(ndo, bp), ipaddr_string(ndo, bp + 4));
bp += 8;
- ND_PRINT((ndo, " timer "));
- relts_print(ndo, EXTRACT_32BITS(bp));
+ ND_PRINT(" timer ");
+ unsigned_relts_print(ndo, GET_BE_U_4(bp));
return (0);
trunc:
return (-1);
static int
print_graft(netdissect_options *ndo,
- register const u_char *bp)
+ const u_char *bp)
{
- ND_TCHECK2(bp[0], 8);
- ND_PRINT((ndo, " src %s grp %s", ipaddr_string(ndo, bp), ipaddr_string(ndo, bp + 4)));
+ ND_TCHECK_8(bp);
+ ND_PRINT(" src %s grp %s", ipaddr_string(ndo, bp), ipaddr_string(ndo, bp + 4));
return (0);
trunc:
return (-1);
static int
print_graft_ack(netdissect_options *ndo,
- register const u_char *bp)
+ const u_char *bp)
{
- ND_TCHECK2(bp[0], 8);
- ND_PRINT((ndo, " src %s grp %s", ipaddr_string(ndo, bp), ipaddr_string(ndo, bp + 4)));
+ ND_TCHECK_8(bp);
+ ND_PRINT(" src %s grp %s", ipaddr_string(ndo, bp), ipaddr_string(ndo, bp + 4));
return (0);
trunc:
return (-1);
projects / tcpdump / blobdiff