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- #include <stdio.h>
- #include "global.h"
- #include "timer.h"
- #include "mbuf.h"
- #include "netuser.h"
- #include "internet.h"
- #include "tcp.h"
- #include "cmdparse.h"
-
- /* TCP connection states */
- char *tcpstates[] = {
- "Closed",
- "Listen",
- "SYN sent",
- "SYN received",
- "Established",
- "FIN wait 1",
- "FIN wait 2",
- "Close wait",
- "Closing",
- "Last ACK",
- "Time wait"
- };
-
- /* TCP closing reasons */
- char *reasons[] = {
- "Normal",
- "Reset",
- "Timeout",
- "ICMP"
- };
- /* TCP subcommand table */
- int domss(),doirtt(),dortt(),dotcpstat(),dowindow(),dotcpkick(),dotcpreset();
- struct cmds tcpcmds[] = {
- "irtt", doirtt, 0, NULLCHAR, NULLCHAR,
- "kick", dotcpkick, 2, "tcp kick <tcb>",
- NULLCHAR,
- "mss", domss, 0, NULLCHAR, NULLCHAR,
- "reset", dotcpreset, 2, "tcp reset <tcb>",
- NULLCHAR,
- "rtt", dortt, 3, "tcp rtt <tcb> <val>",
- NULLCHAR,
- "status", dotcpstat, 0, NULLCHAR, NULLCHAR,
- "window", dowindow, 0, NULLCHAR, NULLCHAR,
- NULLCHAR, NULLFP, 0,
- "tcp subcommands: irtt kick mss reset rtt status window",
- NULLCHAR,
- };
- int
- dotcp(argc,argv)
- int argc;
- char *argv[];
- {
- return subcmd(tcpcmds,argc,argv);
- }
-
- /* Eliminate a TCP connection */
- static int
- dotcpreset(argc,argv)
- int argc;
- char *argv[];
- {
- register struct tcb *tcb;
- extern char notval[];
- long htol();
-
- tcb = (struct tcb *)htol(argv[1]);
- if(!tcpval(tcb)){
- printf(notval);
- return 1;
- }
- close_self(tcb,RESET);
- return 0;
- }
-
- /* Set initial round trip time for new connections */
- static int
- doirtt(argc,argv)
- int argc;
- char *argv[];
- {
- if(argc < 2)
- printf("%d\n",tcp_irtt);
- else
- tcp_irtt = atoi(argv[1]);
- return 0;
- }
-
- /* Set smoothed round trip time for specified TCB */
- static int
- dortt(argc,argv)
- int argc;
- char *argv[];
- {
- register struct tcb *tcb;
- extern char notval[];
- long htol(),atol();
-
- tcb = (struct tcb *)htol(argv[1]);
- if(!tcpval(tcb)){
- printf(notval);
- return 1;
- }
- tcb->srtt = atol(argv[2]);
- return 0;
- }
-
- /* Force a retransmission */
- static int
- dotcpkick(argc,argv)
- int argc;
- char *argv[];
- {
- register struct tcb *tcb;
- extern char notval[];
- long htol();
-
- tcb = (struct tcb *)htol(argv[1]);
- if(kick_tcp(tcb) == -1){
- printf(notval);
- return 1;
- }
- return 0;
- }
-
- /* Set default maximum segment size */
- static int
- domss(argc,argv)
- int argc;
- char *argv[];
- {
- if(argc < 2)
- printf("%d\n",tcp_mss);
- else
- tcp_mss = atoi(argv[1]);
- return 0;
- }
-
- /* Set default window size */
- static int
- dowindow(argc,argv)
- int argc;
- char *argv[];
- {
- if(argc < 2)
- printf("%d\n",tcp_window);
- else
- tcp_window = atoi(argv[1]);
- return 0;
- }
-
- /* Display status of TCBs */
- static int
- dotcpstat(argc,argv)
- int argc;
- char *argv[];
- {
- long htol();
- register struct tcb *tcb;
- extern char notval[];
-
- if(argc < 2){
- tstat();
- } else {
- tcb = (struct tcb *)htol(argv[1]);
- if(tcpval(tcb))
- state_tcp(tcb);
- else
- printf(notval);
- }
- return 0;
- }
-
- /* Dump TCP stats and summary of all TCBs
- * &TCB Rcv-Q Snd-Q Local socket Remote socket State
- * 1234 0 0 xxx.xxx.xxx.xxx:xxxxx xxx.xxx.xxx.xxx:xxxxx Established
- */
- static int
- tstat()
- {
- register int i;
- register struct tcb *tcb;
- char *psocket();
-
- printf("conout %u conin %u reset out %u runt %u chksum err %u bdcsts %u\n",
- tcp_stat.conout,tcp_stat.conin,tcp_stat.resets,tcp_stat.runt,
- tcp_stat.checksum,tcp_stat.bdcsts);
- printf(" &TCB Rcv-Q Snd-Q Local socket Remote socket State\n");
- for(i=0;i<NTCB;i++){
- for(tcb=tcbs[i];tcb != NULLTCB;tcb = tcb->next){
- printf("%8lx%6u%6u ",(long)tcb,tcb->rcvcnt,tcb->sndcnt);
- printf("%-23s",psocket(&tcb->conn.local));
- printf("%-23s",psocket(&tcb->conn.remote));
- printf("%-s",tcpstates[tcb->state]);
- if(tcb->state == LISTEN && (tcb->flags & CLONE))
- printf(" (S)");
- printf("\n");
- }
- }
- fflush(stdout);
- return 0;
- }
- /* Dump a TCP control block in detail */
- static void
- state_tcp(tcb)
- struct tcb *tcb;
- {
- int32 sent,recvd;
-
- if(tcb == NULLTCB)
- return;
- /* Compute total data sent and received; take out SYN and FIN */
- sent = tcb->snd.una - tcb->iss; /* Acknowledged data only */
- recvd = tcb->rcv.nxt - tcb->irs;
- switch(tcb->state){
- case LISTEN:
- case SYN_SENT: /* Nothing received or acked yet */
- sent = recvd = 0;
- break;
- case SYN_RECEIVED:
- recvd--; /* Got SYN, no data acked yet */
- sent = 0;
- break;
- case ESTABLISHED: /* Got and sent SYN */
- case FINWAIT1: /* FIN not acked yet */
- sent--;
- recvd--;
- break;
- case FINWAIT2: /* Our SYN and FIN both acked */
- sent -= 2;
- recvd--;
- break;
- case CLOSE_WAIT: /* Got SYN and FIN, our FIN not yet acked */
- case CLOSING:
- case LAST_ACK:
- sent--;
- recvd -= 2;
- break;
- case TIME_WAIT: /* Sent and received SYN/FIN, all acked */
- sent -= 2;
- recvd -= 2;
- break;
- }
- printf("Local: %s",psocket(&tcb->conn.local));
- printf(" Remote: %s",psocket(&tcb->conn.remote));
- printf(" State: %s\n",tcpstates[tcb->state]);
- printf(" Init seq Unack Next WL1 WL2 Wind MSS Queue Total\n");
- printf("Send:");
- printf("%9lx",tcb->iss);
- printf("%9lx",tcb->snd.una);
- printf("%9lx",tcb->snd.nxt);
- printf("%9lx",tcb->snd.wl1);
- printf("%9lx",tcb->snd.wl2);
- printf("%6u",tcb->snd.wnd);
- printf("%6u",tcb->mss);
- printf("%6u",tcb->sndcnt);
- printf("%11lu\n",sent);
-
- printf("Recv:");
- printf("%9lx",tcb->irs);
- printf(" ");
- printf("%9lx",tcb->rcv.nxt);
- printf(" ");
- printf(" ");
- printf("%6u",tcb->rcv.wnd);
- printf(" ");
- printf("%6u",tcb->rcvcnt);
- printf("%11lu\n",recvd);
-
- if(tcb->reseq != (struct reseq *)NULL){
- register struct reseq *rp;
-
- printf("Reassembly queue:\n");
- for(rp = tcb->reseq;rp != (struct reseq *)NULL; rp = rp->next){
- printf(" seq x%lx %u bytes\n",rp->seg.seq,rp->length);
- }
- }
- if(tcb->backoff > 0)
- printf("Backoff %u ",tcb->backoff);
- if(tcb->flags & RETRAN)
- printf("Retrying ");
- switch(tcb->timer.state){
- case TIMER_STOP:
- printf("Timer stopped ");
- break;
- case TIMER_RUN:
- printf("Timer running (%ld/%ld ms) ",
- (long)MSPTICK * (tcb->timer.start - tcb->timer.count),
- (long)MSPTICK * tcb->timer.start);
- break;
- case TIMER_EXPIRE:
- printf("Timer expired ");
- }
- printf("Smoothed round trip time %ld ms\n",tcb->srtt);
- fflush(stdout);
- }
-
-