diff options
Diffstat (limited to 'freebsd/contrib/tcpdump/print-dvmrp.c')
| -rw-r--r-- | freebsd/contrib/tcpdump/print-dvmrp.c | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/freebsd/contrib/tcpdump/print-dvmrp.c b/freebsd/contrib/tcpdump/print-dvmrp.c index bf391603..f4454f97 100644 --- a/freebsd/contrib/tcpdump/print-dvmrp.c +++ b/freebsd/contrib/tcpdump/print-dvmrp.c @@ -38,6 +38,8 @@ #include "addrtoname.h" /* + * See: RFC 1075 and draft-ietf-idmr-dvmrp-v3 + * * DVMRP message types and flag values shamelessly stolen from * mrouted/dvmrp.h. */ @@ -64,19 +66,18 @@ 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) { register const u_char *ep; register u_char type; + uint8_t major_version, minor_version; ep = (const u_char *)ndo->ndo_snapend; if (bp >= ep) @@ -124,15 +125,15 @@ dvmrp_print(netdissect_options *ndo, case DVMRP_NEIGHBORS2: ND_PRINT((ndo, " 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]; + major_version = *(bp + 3); + minor_version = *(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; @@ -236,7 +237,7 @@ print_probe(netdissect_options *ndo, ND_PRINT((ndo, " [|}")); return (0); } - genid = (bp[0] << 24) | (bp[1] << 16) | (bp[2] << 8) | bp[3]; + genid = EXTRACT_32BITS(bp); bp += 4; len -= 4; ND_PRINT((ndo, ndo->ndo_vflag > 1 ? "\n\t" : " ")); @@ -289,15 +290,14 @@ trunc: static int print_neighbors2(netdissect_options *ndo, register const u_char *bp, register const u_char *ep, - register u_int len) + register u_int len, uint8_t major_version, + uint8_t minor_version) { const u_char *laddr; register u_char metric, thresh, flags; register int ncount; - ND_PRINT((ndo, " (v %d.%d):", - (int)target_level & 0xff, - (int)(target_level >> 8) & 0xff)); + ND_PRINT((ndo, " (v %d.%d):", major_version, minor_version)); while (len > 0 && bp < ep) { ND_TCHECK2(bp[0], 8); |