__RCSID("$NetBSD: print-tcp.c,v 1.8 2007/07/24 11:53:48 drochner Exp $");
#endif
-#ifdef HAVE_CONFIG_H
#include <config.h>
-#endif
#include "netdissect-stdinc.h"
{ TH_URG, "U" },
{ TH_ECNECHO, "E" },
{ TH_CWR, "W" },
+ { TH_AE, "e" },
{ 0, NULL }
};
{
const struct tcphdr *tp;
const struct ip *ip;
- u_char flags;
+ uint16_t flags;
u_int hlen;
char ch;
uint16_t sport, dport, win, urp;
return;
}
- flags = GET_U_1(tp->th_flags);
+ flags = tcp_get_flags(tp);
ND_PRINT("Flags [%s]", bittok2str_nosep(tcp_flag_values, "none", flags));
if (!ndo->ndo_Sflag && (flags & TH_ACK)) {
}
}
- if (flags & TH_ACK) {
+ if (flags & TH_ACK)
ND_PRINT(", ack %u", ack);
- }
+ else
+ if (ndo->ndo_vflag > 1 && ack != 0)
+ ND_PRINT(", [ack %u != 0 while ACK flag not set]", ack);
ND_PRINT(", win %u", win);
if (flags & TH_URG)
ND_PRINT(", urg %u", urp);
+ else
+ if (ndo->ndo_vflag > 1 && urp != 0)
+ ND_PRINT(", [urg %u != 0 while URG flag not set]", urp);
/*
* Handle any options.
*/
nd_trunc_longjmp(ndo);
}
bp += header_len;
- if ((flags & TH_RST) && ndo->ndo_vflag) {
- print_tcp_rst_data(ndo, bp, length);
+ if (flags & TH_RST) {
+ if (ndo->ndo_vflag)
+ print_tcp_rst_data(ndo, bp, length);
+ else
+ ND_TCHECK_LEN(bp, length);
return;
}
print_tcp_rst_data(netdissect_options *ndo,
const u_char *sp, u_int length)
{
- ND_PRINT(ND_TTEST_LEN(sp, length) ? " [RST" : " [!RST");
- if (length > MAX_RST_DATA_LEN) {
- length = MAX_RST_DATA_LEN; /* can use -X for longer */
+ ND_PRINT(" [RST");
+ if (length > MAX_RST_DATA_LEN) /* can use -X for longer */
ND_PRINT("+"); /* indicate we truncate */
- }
ND_PRINT(" ");
- (void)nd_printn(ndo, sp, length, ndo->ndo_snapend);
+ nd_printjn(ndo, sp, ND_MIN(length, MAX_RST_DATA_LEN));
ND_PRINT("]");
+ ND_TCHECK_LEN(sp, length);
}
static void