/* mtcp.c - mtcp */ #include <conf.h> #include <kernel.h> #include <deqna.h> #include <ether.h> #include <ip.h> #include <ctype.h> #include "../h/tcp.h" #include "../h/network.h" #include "../h/monitor.h" extern struct epacket *epptr; extern Bool match; extern Bool found; struct sign tcp_tab[] = {TCPS}; #define TCPHLEN 20 /*------------------------------------------------------ * mtcp - print TCP packet information *------------------------------------------------------ */ mtcp(stdin, stdout, stderr, nargs, args) int stdin, stdout, stderr, nargs; char *args[]; { int i, j, length; char str[80]; unsigned *fport, *tport; struct ip *ipptr; struct tcp *tcpptr; struct sign *faddptr; struct sign *taddptr; switch(net2hs(epptr->e_ptype)){ case EP_IP: break; default: userret(); } ipptr = (struct ip *) epptr->ep_data; switch(ipptr->i_proto){ case IPRO_TCP: break; default: userret(); } tcpptr = (struct tcp *)ipptr->i_data; length = 8; for (i=1; i<nargs; i++){ switch(args[i][0]){ case 'F': args[i] += 1; if(!(faddptr=checkname(tcp_tab,args[i]))){ fprintf(stderr,"Unknown port name\n"); found = FALSE; userret(); } *fport = faddptr->s_number; fprintf(0,"number=%d\n",faddptr->s_number); fprintf(0,"fport=%u\n",*fport); if(*fport != net2hs(tcpptr->tc_sport)){ userret(); } break; case 'f': args[i] += 1; if(udpparse(fport,args[i]) == SYSERR){ fprintf(stderr,"Invalid port number\n"); found = FALSE; userret(); } fprintf(0,"fport=%u, sport=%u\n",*fport,net2hs(tcpptr->tc_sport)); if(*fport != net2hs(tcpptr->tc_sport)){ userret(); } break; case 'T': args[i] += 1; if(!(taddptr=checkname(tcp_tab,args[i]))){ fprintf(stderr,"Unknown port number\n"); found = FALSE; userret(); } *tport = taddptr->s_number; if(*tport != net2hs(tcpptr->tc_dport)){ userret(); } break; case 't': args[i] += 1; if(udpparse(tport,args[i]) == SYSERR){ fprintf(stderr,"Invalid port number\n"); found = FALSE; userret(); } fprintf(0,"port=%u\n",*tport); if(*tport != net2hs(tcpptr->tc_dport)){ userret(); } break; case 'l': args[i] += 1; length = atoi(args[i]); if(length > (EMAXPAK-IPHLEN-TCPHLEN)){ fprintf(stderr,"Invalid data length\n"); found = FALSE; userret(); } break; default: fprintf(stderr,"Syntax error\n"); found = FALSE; userret(); } } match = TRUE; sprintf(str,"%d.%d.%d.%d -> %d.%d.%d.%d\n",ipptr->i_src[0]&0377,ipptr->i_src[1]&0377,ipptr->i_src[2]&0377,ipptr->i_src[3]&0377,ipptr->i_dest[0]&0377,ipptr->i_dest[1]&0377,ipptr->i_dest[2]&0377,ipptr->i_dest[3]&0377); write(stdout, str, strlen(str)); faddptr = checknum(tcp_tab, net2hs(tcpptr->tc_sport)); taddptr = checknum(tcp_tab, net2hs(tcpptr->tc_dport)); sprintf(str,"%9s(%4u) -> %9s(%4u)\n",faddptr->s_lname,net2hs(tcpptr->tc_sport),taddptr->s_lname,net2hs(tcpptr->tc_dport)); write(stdout,str,strlen(str)); sprintf(str,"seq=%ul ack=%ul off=%o flag=%o win=%u sum=%u urp=%u\n",net2hl(tcpptr->tc_seq),net2hl(tcpptr->tc_ack),tcpptr->tc_off,tcpptr->tc_flags,net2hs(tcpptr->tc_win),net2hs(tcpptr->tc_sum),net2hs(tcpptr->tc_urp)); write(stdout, str, strlen(str)); for(i=0; i<length; i++) fprintf(stdout,"%03o ",tcpptr->tc_data[i]&0xff); fprintf(stdout,"\n"); return(OK); }