/*
 * Copyright (c) 1995 Danny Gasparovski.
 * Portions copyright (c) 2000 Kelly Price.
 *
 * Please read the file COPYRIGHT for the
 * terms and conditions of the copyright.
 */

#include "slirp/slirp.h"

FILE *dfd = NULL;
#ifdef SLIRP_DEBUG
int dostats = 1;
#else
int dostats = 0;
#endif
int slirp_debug = 0;

extern char *strerror _P((int));

/* Carry over one item from main.c so that the tty's restored.
 * Only done when the tty being used is /dev/tty --RedWolf */
extern struct termios slirp_tty_settings;
extern int slirp_tty_restore;

void debug_init(file, dbg) char *file;
int dbg;
{
        /* Close the old debugging file */
        if (dfd)
                fclose(dfd);

        dfd = fopen(file, "w");
        if (dfd != NULL) {
#if 1
                fprintf(dfd, "Slirp %s - Debugging Started.\n", SLIRP_VERSION);
#endif
                fprintf(dfd, "Debugging Started level %i.\r\n", dbg);
                fflush(dfd);
                slirp_debug = dbg;
        } else {
                lprint("Error: Debugging file \"%s\" could not be opened: %s\r\n", file, strerror(errno));
        }
}

/*
 * Dump a packet in the same format as tcpdump -x
 */
#ifdef SLIRP_DEBUG
void dump_packet(dat, n) void *dat;
int n;
{
        u_char *pptr = (u_char *)dat;
        int j, k;

        n /= 16;
        n++;
        DEBUG_MISC((dfd, "PACKET DUMPED: \n"));
        for (j = 0; j < n; j++) {
                for (k = 0; k < 6; k++)
                        DEBUG_MISC((dfd, "%02x ", *pptr++));
                DEBUG_MISC((dfd, "\n"));
                fflush(dfd);
        }
}
#endif

#if 0
/*
 * Statistic routines
 * 
 * These will print statistics to the screen, the debug file (dfd), or
 * a buffer, depending on "type", so that the stats can be sent over
 * the link as well.
 */

void
ttystats(ttyp)
	struct ttys *ttyp;
{
	struct slirp_ifstats *is = &ttyp->ifstats;
	char buff[512];
	
	lprint(" \r\n");
	
	if (if_comp & IF_COMPRESS)
	   strcpy(buff, "on");
	else if (if_comp & IF_NOCOMPRESS)
	   strcpy(buff, "off");
	else
	   strcpy(buff, "off (for now)");
	lprint("Unit %d:\r\n", ttyp->unit);
	lprint("  using %s encapsulation (VJ compression is %s)\r\n", (
#ifdef USE_PPP
	       ttyp->proto==PROTO_PPP?"PPP":
#endif
	       "SLIP"), buff);
	lprint("  %d baudrate\r\n", ttyp->baud);
	lprint("  interface is %s\r\n", ttyp->up?"up":"down");
	lprint("  using fd %d, guardian pid is %d\r\n", ttyp->fd, ttyp->pid);
#ifndef FULL_BOLT
	lprint("  towrite is %d bytes\r\n", ttyp->towrite);
#endif
	if (ttyp->zeros)
	   lprint("  %d zeros have been typed\r\n", ttyp->zeros);
	else if (ttyp->ones)
	   lprint("  %d ones have been typed\r\n", ttyp->ones);
	lprint("Interface stats:\r\n");
	lprint("  %6d output packets sent (%d bytes)\r\n", is->out_pkts, is->out_bytes);
	lprint("  %6d output packets dropped (%d bytes)\r\n", is->out_errpkts, is->out_errbytes);
	lprint("  %6d input packets received (%d bytes)\r\n", is->in_pkts, is->in_bytes);
	lprint("  %6d input packets dropped (%d bytes)\r\n", is->in_errpkts, is->in_errbytes);
	lprint("  %6d bad input packets\r\n", is->in_mbad);
}

void
allttystats()
{
	struct ttys *ttyp;
	
	for (ttyp = ttys; ttyp; ttyp = ttyp->next)
	   ttystats(ttyp);
}
#endif

void ipstats() {
        lprint(" \r\n");

        lprint("IP stats:\r\n");
        lprint("  %6d total packets received (%d were unaligned)\r\n", ipstat.ips_total, ipstat.ips_unaligned);
        lprint("  %6d with incorrect version\r\n", ipstat.ips_badvers);
        lprint("  %6d with bad header checksum\r\n", ipstat.ips_badsum);
        lprint("  %6d with length too short (len < sizeof(iphdr))\r\n", ipstat.ips_tooshort);
        lprint("  %6d with length too small (len < ip->len)\r\n", ipstat.ips_toosmall);
        lprint("  %6d with bad header length\r\n", ipstat.ips_badhlen);
        lprint("  %6d with bad packet length\r\n", ipstat.ips_badlen);
        lprint("  %6d fragments received\r\n", ipstat.ips_fragments);
        lprint("  %6d fragments dropped\r\n", ipstat.ips_fragdropped);
        lprint("  %6d fragments timed out\r\n", ipstat.ips_fragtimeout);
        lprint("  %6d packets reassembled ok\r\n", ipstat.ips_reassembled);
        lprint("  %6d outgoing packets fragmented\r\n", ipstat.ips_fragmented);
        lprint("  %6d total outgoing fragments\r\n", ipstat.ips_ofragments);
        lprint("  %6d with bad protocol field\r\n", ipstat.ips_noproto);
        lprint("  %6d total packets delivered\r\n", ipstat.ips_delivered);
}

#if 0
void
vjstats()
{
	lprint(" \r\n");
	
	lprint("VJ compression stats:\r\n");
	
	lprint("  %6d outbound packets (%d compressed)\r\n",
	       comp_s.sls_packets, comp_s.sls_compressed);
	lprint("  %6d searches for connection stats (%d misses)\r\n",
	       comp_s.sls_searches, comp_s.sls_misses);
	lprint("  %6d inbound uncompressed packets\r\n", comp_s.sls_uncompressedin);
	lprint("  %6d inbound compressed packets\r\n", comp_s.sls_compressedin);
	lprint("  %6d inbound unknown type packets\r\n", comp_s.sls_errorin);
	lprint("  %6d inbound packets tossed due to error\r\n", comp_s.sls_tossed);
}
#endif

void tcpstats() {
        lprint(" \r\n");

        lprint("TCP stats:\r\n");

        lprint("  %6d packets sent\r\n", tcpstat.tcps_sndtotal);
        lprint("          %6d data packets (%d bytes)\r\n", tcpstat.tcps_sndpack, tcpstat.tcps_sndbyte);
        lprint("          %6d data packets retransmitted (%d bytes)\r\n", tcpstat.tcps_sndrexmitpack, tcpstat.tcps_sndrexmitbyte);
        lprint("          %6d ack-only packets (%d delayed)\r\n", tcpstat.tcps_sndacks, tcpstat.tcps_delack);
        lprint("          %6d URG only packets\r\n", tcpstat.tcps_sndurg);
        lprint("          %6d window probe packets\r\n", tcpstat.tcps_sndprobe);
        lprint("          %6d window update packets\r\n", tcpstat.tcps_sndwinup);
        lprint("          %6d control (SYN/FIN/RST) packets\r\n", tcpstat.tcps_sndctrl);
        lprint("          %6d times tcp_output did nothing\r\n", tcpstat.tcps_didnuttin);

        lprint("  %6d packets received\r\n", tcpstat.tcps_rcvtotal);
        lprint("          %6d acks (for %d bytes)\r\n", tcpstat.tcps_rcvackpack, tcpstat.tcps_rcvackbyte);
        lprint("          %6d duplicate acks\r\n", tcpstat.tcps_rcvdupack);
        lprint("          %6d acks for unsent data\r\n", tcpstat.tcps_rcvacktoomuch);
        lprint("          %6d packets received in sequence (%d bytes)\r\n", tcpstat.tcps_rcvpack, tcpstat.tcps_rcvbyte);
        lprint("          %6d completely duplicate packets (%d bytes)\r\n", tcpstat.tcps_rcvduppack, tcpstat.tcps_rcvdupbyte);

        lprint("          %6d packets with some duplicate data (%d bytes duped)\r\n", tcpstat.tcps_rcvpartduppack,
               tcpstat.tcps_rcvpartdupbyte);
        lprint("          %6d out-of-order packets (%d bytes)\r\n", tcpstat.tcps_rcvoopack, tcpstat.tcps_rcvoobyte);
        lprint("          %6d packets of data after window (%d bytes)\r\n", tcpstat.tcps_rcvpackafterwin,
               tcpstat.tcps_rcvbyteafterwin);
        lprint("          %6d window probes\r\n", tcpstat.tcps_rcvwinprobe);
        lprint("          %6d window update packets\r\n", tcpstat.tcps_rcvwinupd);
        lprint("          %6d packets received after close\r\n", tcpstat.tcps_rcvafterclose);
        lprint("          %6d discarded for bad checksums\r\n", tcpstat.tcps_rcvbadsum);
        lprint("          %6d discarded for bad header offset fields\r\n", tcpstat.tcps_rcvbadoff);

        lprint("  %6d connection requests\r\n", tcpstat.tcps_connattempt);
        lprint("  %6d connection accepts\r\n", tcpstat.tcps_accepts);
        lprint("  %6d connections established (including accepts)\r\n", tcpstat.tcps_connects);
        lprint("  %6d connections closed (including %d drop)\r\n", tcpstat.tcps_closed, tcpstat.tcps_drops);
        lprint("  %6d embryonic connections dropped\r\n", tcpstat.tcps_conndrops);
        lprint("  %6d segments we tried to get rtt (%d succeeded)\r\n", tcpstat.tcps_segstimed, tcpstat.tcps_rttupdated);
        lprint("  %6d retransmit timeouts\r\n", tcpstat.tcps_rexmttimeo);
        lprint("          %6d connections dropped by rxmt timeout\r\n", tcpstat.tcps_timeoutdrop);
        lprint("  %6d persist timeouts\r\n", tcpstat.tcps_persisttimeo);
        lprint("  %6d keepalive timeouts\r\n", tcpstat.tcps_keeptimeo);
        lprint("          %6d keepalive probes sent\r\n", tcpstat.tcps_keepprobe);
        lprint("          %6d connections dropped by keepalive\r\n", tcpstat.tcps_keepdrops);
        lprint("  %6d correct ACK header predictions\r\n", tcpstat.tcps_predack);
        lprint("  %6d correct data packet header predictions\n", tcpstat.tcps_preddat);
        lprint("  %6d TCP cache misses\r\n", tcpstat.tcps_socachemiss);

        /*	lprint("    Packets received too short:		%d\r\n", tcpstat.tcps_rcvshort); */
        /*	lprint("    Segments dropped due to PAWS:	%d\r\n", tcpstat.tcps_pawsdrop); */
}

void udpstats() {
        lprint(" \r\n");

        lprint("UDP stats:\r\n");
        lprint("  %6d datagrams received\r\n", udpstat.udps_ipackets);
        lprint("  %6d with packets shorter than header\r\n", udpstat.udps_hdrops);
        lprint("  %6d with bad checksums\r\n", udpstat.udps_badsum);
        lprint("  %6d with data length larger than packet\r\n", udpstat.udps_badlen);
        lprint("  %6d UDP socket cache misses\r\n", udpstat.udpps_pcbcachemiss);
        lprint("  %6d datagrams sent\r\n", udpstat.udps_opackets);
}

void icmpstats() {
        lprint(" \r\n");
        lprint("ICMP stats:\r\n");
        lprint("  %6d ICMP packets received\r\n", icmpstat.icps_received);
        lprint("  %6d were too short\r\n", icmpstat.icps_tooshort);
        lprint("  %6d with bad checksums\r\n", icmpstat.icps_checksum);
        lprint("  %6d with type not supported\r\n", icmpstat.icps_notsupp);
        lprint("  %6d with bad type feilds\r\n", icmpstat.icps_badtype);
        lprint("  %6d ICMP packets sent in reply\r\n", icmpstat.icps_reflect);
}

void mbufstats() {
        struct SLIRPmbuf *m;
        int i;

        lprint(" \r\n");

        lprint("Mbuf stats:\r\n");

        lprint("  %6d mbufs allocated (%d max)\r\n", mbuf_alloced, mbuf_max);

        i = 0;
        for (m = m_freelist.m_next; m != &m_freelist; m = m->m_next)
                i++;
        lprint("  %6d mbufs on free list\r\n", i);

        i = 0;
        for (m = m_usedlist.m_next; m != &m_usedlist; m = m->m_next)
                i++;
        lprint("  %6d mbufs on used list\r\n", i);
        lprint("  %6d mbufs queued as packets\r\n\r\n", if_queued);
}

void sockstats(void) {
        char buff[256];
        int n;
        struct SLIRPsocket *so;

        lprint(" \r\n");

        lprint("Proto[state]     Sock     Local Address, Port  Remote Address, Port RecvQ SendQ\r\n");

        for (so = tcb.so_next; so != &tcb; so = so->so_next) {

                n = sprintf(buff, "tcp[%s]", so->so_tcpcb ? tcpstates[so->so_tcpcb->t_state] : "NONE");
                while (n < 17)
                        buff[n++] = ' ';
                buff[17] = 0;
                lprint("%s %3d   %15s %5d ", buff, so->s, inet_ntoa(so->so_laddr), ntohs(so->so_lport));
                lprint("%15s %5d %5d %5d\r\n", inet_ntoa(so->so_faddr), ntohs(so->so_fport), so->so_rcv.sb_cc, so->so_snd.sb_cc);
        }

        for (so = udb.so_next; so != &udb; so = so->so_next) {

                n = sprintf(buff, "udp[%d sec]", (so->so_expire - curtime) / 1000);
                while (n < 17)
                        buff[n++] = ' ';
                buff[17] = 0;
                lprint("%s %3d  %15s %5d  ", buff, so->s, inet_ntoa(so->so_laddr), ntohs(so->so_lport));
                lprint("%15s %5d %5d %5d\r\n", inet_ntoa(so->so_faddr), ntohs(so->so_fport), so->so_rcv.sb_cc, so->so_snd.sb_cc);
        }
}

void printf_sockstats(void) {
        char buff[256];
        int n;
        struct SLIRPsocket *so;

        printf(" \r\n");

        printf("Proto[state]     Sock     Local Address, Port  Remote Address, Port RecvQ SendQ\r\n");

        for (so = tcb.so_next; so != &tcb; so = so->so_next) {

                n = sprintf(buff, "tcp[%s]", so->so_tcpcb ? tcpstates[so->so_tcpcb->t_state] : "NONE");
                while (n < 17)
                        buff[n++] = ' ';
                buff[17] = 0;
                printf("%s %3d   %15s %5d ", buff, so->s, inet_ntoa(so->so_laddr), ntohs(so->so_lport));
                printf("%15s %5d %5d %5d\r\n", inet_ntoa(so->so_faddr), ntohs(so->so_fport), so->so_rcv.sb_cc, so->so_snd.sb_cc);
        }

        for (so = udb.so_next; so != &udb; so = so->so_next) {

                n = sprintf(buff, "udp[%d sec]", (so->so_expire - curtime) / 1000);
                while (n < 17)
                        buff[n++] = ' ';
                buff[17] = 0;
                printf("%s %3d  %15s %5d  ", buff, so->s, inet_ntoa(so->so_laddr), ntohs(so->so_lport));
                printf("%15s %5d %5d %5d\r\n", inet_ntoa(so->so_faddr), ntohs(so->so_fport), so->so_rcv.sb_cc, so->so_snd.sb_cc);
        }
        printf("\n\n");
}

// Simple code to purge and close open sockets.
// This way we can open/close/open/close..
void purgesocks(void) {
        struct SLIRPsocket *so;

        for (so = tcb.so_next; so != &tcb; so = so->so_next) {

                closesocket(so->s); // close the socket
        }
}

#if 1
void slirp_exit(exit_status) int exit_status;
{
        //	struct ttys *ttyp;

        DEBUG_CALL("slirp_exit");
        DEBUG_ARG("exit_status = %d", exit_status);

        if (dostats) {
                lprint_print = (int(*) _P((void *, const char *, va_list)))vfprintf;
                if (!dfd)
                        debug_init("slirp_stats", 0xf);
                lprint_arg = (char **)&dfd;

                ipstats();
                tcpstats();
                udpstats();
                icmpstats();
                mbufstats();
                sockstats();
                fclose(dfd);
                //		allttystats();
                //		vjstats();
        }

        //	for (ttyp = ttys; ttyp; ttyp = ttyp->next)
        //	   tty_detached(ttyp, 1);

        //	if (slirp_forked) {
        //		/* Menendez time */
        //		if (kill(getppid(), SIGQUIT) < 0)
        //			lprint("Couldn't kill parent process %ld!\n",
        //			    (long) getppid());
        //  	}

        /* Restore the terminal if we gotta */
        //	if(slirp_tty_restore)
        //	  tcsetattr(0,TCSANOW, &slirp_tty_settings);  /* NOW DAMMIT! */
        //	exit(exit_status);

        // This will iterate though the sockets, and close them all (think redirects)
        // PCem will have SLiRP open, close several times, which trips up SLiRP
        // So for now I go through the sockets and close them
        purgesocks();
}
#endif
