tcp_debug.c

一款类linux的操作系统源码

/*
 *  Roadrunner/pk
 *    Copyright (C) 1989-2002  Cornfed Systems, Inc.
 *
 *  The Roadrunner/pk operating system is free software; you can
 *  redistribute and/or modify it under the terms of the GNU General
 *  Public License, version 2, as published by the Free Software
 *  Foundation.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public
 *  License along with this program; if not, write to the Free
 *  Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 *  MA 02111-1307 USA
 *
 *  More information about the Roadrunner/pk operating system of
 *  which this file is a part is available on the World-Wide Web
 *  at: http://www.cornfed.com.
 *
 */

#include <net/ether.h>
#include <net/tcp.h>
#include <stdio.h>
#include <stdlib.h>

#if _DEBUG_TCP

char *tcb_states[] = {
    "CLOSED",
    "LISTEN",
    "SYN_SENT",
    "SYN_RECEIVED",
    "ESTABLISHED",
    "CLOSE_WAIT",
    "FIN_WAIT_1",
    "CLOSING",
    "LAST_ACK",
    "FIN_WAIT_2",
    "TIME_WAIT"
};

void
tcp_dump_segment(char *func, tcphdr_t th)
{
    kprintf("%s: sport %u dport %u seq %u ack %u win %u",
	    func, th->sport, th->dport, th->seq, th->ack, th->win);
    if (th->flags & TF_FIN)
	kprintf(" FIN");
    if (th->flags & TF_SYN)
	kprintf(" SYN");
    if (th->flags & TF_RST)
	kprintf(" RST");
    if (th->flags & TF_PSH)
	kprintf(" PSH");
    if (th->flags & TF_ACK)
	kprintf(" ACK");
    if (th->flags & TF_URG)
	kprintf(" URG");
    kprintf("\n");
}

static void
tcp_dump_reass(char *s, buf_t b)
{
    etherhdr_t eh;
    iphdr_t ih;
    tcphdr_t th;
    int segcnt = 0;

    for (; b != NULL; b = b->next) {
	if (segcnt++ == 0)
	    kprintf("%s:", s);

	eh = (etherhdr_t) bstart(b);
	ih = (iphdr_t) eh->data;
	th = (tcphdr_t) (eh->data + IP_HLEN(ih));

	kprintf(" [%u,%u]", th->seq,
		th->seq + (ih->len - IP_HLEN(ih) - TCP_HLEN(th)) - 1);
    }
    if (segcnt > 0)
	kprintf("\n");
}
#endif

#if _DEBUG_RETR
void
tcp_dump_retr(char *s, buf_t b)
{
    etherhdr_t eh;
    iphdr_t ih;
    tcphdr_t th;
    int datalen, segcnt = 0;

    for (; b != NULL; b = b->next) {
	if (segcnt++ == 0)
	    kprintf("%s:", s);

	eh = (etherhdr_t) bstart(b);
	ih = (iphdr_t) eh->data;
	th = (tcphdr_t) (eh->data + IP_HLEN(ih));
	datalen = NET2HS(ih->len) - IP_HLEN(ih) - TCP_HLEN(th);

	kprintf(" <");
	if (th->flags & TF_SYN)
	    kprintf("SYN,");
	if (th->flags & TF_FIN)
	    kprintf("FIN,");
	kprintf("%u,", NET2HL(th->seq));
	if (datalen > 0)
	    kprintf("%u>", NET2HL(th->seq) + datalen - 1);
	else
	    kprintf("->");
    }
    if (segcnt > 0)
	kprintf("\n");
}
#endif