/* * PPP User command processing module * * Written by Toshiharu OHNO (tony-o@iij.ad.jp) * * Copyright (C) 1993, Internet Initiative Japan, Inc. All rights reserverd. * * Redistribution and use in source and binary forms are permitted * provided that the above copyright notice and this paragraph are * duplicated in all such forms and that any documentation, * advertising materials, and other materials related to such * distribution and use acknowledge that the software was developed * by the Internet Initiative Japan, Inc. The name of the * IIJ may not be used to endorse or promote products derived * from this software without specific prior written permission. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. * * $Id: command.c,v 1.15 1996/03/08 09:03:04 ache Exp $ * */ #include #include #include #include #include #include "fsm.h" #include "phase.h" #include "lcp.h" #include "ipcp.h" #include "modem.h" #include "filter.h" #include "command.h" #include "hdlc.h" #include "vars.h" #include "auth.h" #include #include #include #include #include "os.h" #include extern int MakeArgs(); extern void Cleanup(), TtyTermMode(), PacketMode(); extern int EnableCommand(), DisableCommand(), DisplayCommand(); extern int AcceptCommand(), DenyCommand(); extern int LocalAuthCommand(); extern int LoadCommand(), SaveCommand(); extern int ChangeParity(char *); extern int SelectSystem(); extern int ShowRoute(); extern void TtyOldMode(), TtyCommandMode(); extern struct pppvars pppVars; extern struct cmdtab const SetCommands[]; struct in_addr ifnetmask; static int ShowCommand(), TerminalCommand(), QuitCommand(); static int CloseCommand(), DialCommand(), DownCommand(); static int SetCommand(), AddCommand(), DeleteCommand(); static int ShellCommand(); static int HelpCommand(list, argc, argv, plist) struct cmdtab *list; int argc; char **argv; struct cmdtab *plist; { struct cmdtab *cmd; int n; char c; if (argc > 0) { for (cmd = plist; cmd->name; cmd++) { if (strcmp(cmd->name, *argv) == 0 && (cmd->lauth & VarLocalAuth)) { if (plist == SetCommands) printf("set "); printf("%s %s\n", cmd->name, cmd->syntax); return(1); } } return(1); } n = 0; for (cmd = plist; cmd->func; cmd++) { if (cmd->name && (cmd->lauth & VarLocalAuth)) { c = (n & 1)? '\n' : '\t'; printf(" %-8s: %-20s%c", cmd->name, cmd->helpmes, c); n++; } } if (n & 1) printf("\n"); return(1); } int IsInteractive() { char *mes = NULL; if (mode & MODE_AUTO) mes = "Working in auto mode."; else if (mode & MODE_DIRECT) mes = "Working in direct mode."; else if (mode & MODE_DEDICATED) mes = "Working in dedicated mode."; if (mes) { printf("%s\n", mes); return(0); } return(1); } static int DialCommand(cmdlist, argc, argv) struct cmdtab *cmdlist; int argc; char **argv; { int tries; if (LcpFsm.state > ST_CLOSED) { printf("LCP state is [%s]\n", StateNames[LcpFsm.state]); return(1); } if (!IsInteractive()) return(1); if (argc > 0) { if (SelectSystem(*argv, CONFFILE) < 0) { printf("%s: not found.\n", *argv); return(1); } } tries = 0; do { printf("Dial attempt %u\n", ++tries); modem = OpenModem(mode); if (modem < 0) { printf("failed to open modem.\n"); modem = 0; break; } if (DialModem()) { sleep(1); ModemTimeout(); PacketMode(); break; } } while (VarDialTries == 0 || tries < VarDialTries); return(1); } static int ShellCommand(cmdlist, argc, argv) struct cmdtab *cmdlist; int argc; char **argv; { const char *shell; pid_t shpid; if((shell = getenv("SHELL")) == 0) { shell = _PATH_BSHELL; } #ifndef HAVE_SHELL_CMD_WITH_ANY_MODE if( mode != MODE_INTER) { fprintf(stdout, "Can start an shell only in interactive mode\n"); return(1); } #else if(argc == 0 && !(mode & MODE_INTER)) { fprintf(stderr, "Can start an interactive shell only in interactive mode\n"); return(1); } #endif /* HAVE_SHELL_CMD_WITH_ANY_MODE */ if((shpid = fork()) == 0) { int i; for(i = 3; i < getdtablesize(); i++) (void)close(i); /* * We are running setuid, we should change to * real user for avoiding security problems. */ setgid( getgid() ); setuid( getuid() ); TtyOldMode(); if(argc > 0) execvp(argv[0], argv); else execl(shell, shell, NULL); fprintf(stdout, "exec() of %s failed\n", argc > 0? argv[0]: shell); exit(255); } if( shpid == (pid_t)-1 ) { fprintf(stdout, "Fork failed\n"); } else { int status; (void)waitpid(shpid, &status, 0); } TtyCommandMode(1); return(0); } static char StrOption[] = "option .."; static char StrRemote[] = "[remote]"; char StrNull[] = ""; struct cmdtab const Commands[] = { { "accept", NULL, AcceptCommand, LOCAL_AUTH, "accept option request", StrOption}, { "add", NULL, AddCommand, LOCAL_AUTH, "add route", "dest mask gateway"}, { "close", NULL, CloseCommand, LOCAL_AUTH, "Close connection", StrNull}, { "delete", NULL, DeleteCommand, LOCAL_AUTH, "delete route", "ALL | dest gateway [mask]"}, { "deny", NULL, DenyCommand, LOCAL_AUTH, "Deny option request", StrOption}, { "dial", "call", DialCommand, LOCAL_AUTH, "Dial and login", StrRemote}, { "disable", NULL, DisableCommand, LOCAL_AUTH, "Disable option", StrOption}, { "display", NULL, DisplayCommand, LOCAL_AUTH, "Display option configs", StrNull}, { "enable", NULL, EnableCommand, LOCAL_AUTH, "Enable option", StrOption}, { "passwd", NULL, LocalAuthCommand,LOCAL_NO_AUTH, "Password for manipulation", StrOption}, { "load", NULL, LoadCommand, LOCAL_AUTH, "Load settings", StrRemote}, { "save", NULL, SaveCommand, LOCAL_AUTH, "Save settings", StrNull}, { "set", "setup", SetCommand, LOCAL_AUTH, "Set parameters", "var value"}, { "shell", "!", ShellCommand, LOCAL_AUTH, "Run a subshell", "[sh command]"}, { "show", NULL, ShowCommand, LOCAL_AUTH, "Show status and statictics", "var"}, { "term", NULL, TerminalCommand,LOCAL_AUTH, "Enter to terminal mode", StrNull}, { "quit", "bye", QuitCommand, LOCAL_AUTH | LOCAL_NO_AUTH, "Quit PPP program", "[all]"}, { "help", "?", HelpCommand, LOCAL_AUTH | LOCAL_NO_AUTH, "Display this message", "[command]", (void *)Commands }, { NULL, "down", DownCommand, LOCAL_AUTH, "Generate down event", StrNull}, { NULL, NULL, NULL }, }; extern int ReportCcpStatus(); extern int ReportLcpStatus(); extern int ReportIpcpStatus(); extern int ReportProtStatus(); extern int ReportCompress(); extern int ShowModemStatus(); extern int ReportHdlcStatus(); extern int ShowMemMap(); static char *LogLevelName[] = { LM_PHASE, LM_CHAT, LM_LQM, LM_LCP, LM_TCPIP, LM_HDLC, LM_ASYNC, }; static int ShowDebugLevel() { int i; printf("%02x: ", loglevel); for (i = LOG_PHASE; i < MAXLOGLEVEL; i++) { if (loglevel & (1 << i)) printf("%s ", LogLevelName[i]); } printf("\n"); return(1); } static int ShowEscape() { int code, bit; if (EscMap[32]) { for (code = 0; code < 32; code++) { if (EscMap[code]) { for (bit = 0; bit < 8; bit++) { if (EscMap[code] & (1<= 0) { printf(" %d seconds, ", VarRedialTimeout); } else { printf(" Random 0 - %d seconds, ", REDIAL_PERIOD); } if (VarDialTries) printf("%d dial tries", VarDialTries); printf("\n"); return(1); } extern int ShowIfilter(), ShowOfilter(), ShowDfilter(), ShowAfilter(); struct cmdtab const ShowCommands[] = { { "afilter", NULL, ShowAfilter, LOCAL_AUTH, "Show keep Alive filters", StrOption}, { "auth", NULL, ShowAuthKey, LOCAL_AUTH, "Show auth name/key", StrNull}, { "ccp", NULL, ReportCcpStatus, LOCAL_AUTH, "Show CCP status", StrNull}, { "compress", NULL, ReportCompress, LOCAL_AUTH, "Show compression statictics", StrNull}, { "debug", NULL, ShowDebugLevel, LOCAL_AUTH, "Show current debug level", StrNull}, { "dfilter", NULL, ShowDfilter, LOCAL_AUTH, "Show Demand filters", StrOption}, { "escape", NULL, ShowEscape, LOCAL_AUTH, "Show escape characters", StrNull}, { "hdlc", NULL, ReportHdlcStatus, LOCAL_AUTH, "Show HDLC error summary", StrNull}, { "ifilter", NULL, ShowIfilter, LOCAL_AUTH, "Show Input filters", StrOption}, { "ipcp", NULL, ReportIpcpStatus, LOCAL_AUTH, "Show IPCP status", StrNull}, { "lcp", NULL, ReportLcpStatus, LOCAL_AUTH, "Show LCP status", StrNull}, { "log", NULL, ShowLogList, LOCAL_AUTH, "Show log records", StrNull}, { "mem", NULL, ShowMemMap, LOCAL_AUTH, "Show memory map", StrNull}, { "modem", NULL, ShowModemStatus, LOCAL_AUTH, "Show modem setups", StrNull}, { "ofilter", NULL, ShowOfilter, LOCAL_AUTH, "Show Output filters", StrOption}, { "proto", NULL, ReportProtStatus, LOCAL_AUTH, "Show protocol summary", StrNull}, { "route", NULL, ShowRoute, LOCAL_AUTH, "Show routing table", StrNull}, { "timeout", NULL, ShowTimeout, LOCAL_AUTH, "Show Idle timeout value", StrNull}, { "redial", NULL, ShowRedial, LOCAL_AUTH, "Show Redial timeout value", StrNull}, { "version", NULL, ShowVersion, LOCAL_NO_AUTH | LOCAL_AUTH, "Show version string", StrNull}, { "help", "?", HelpCommand, LOCAL_NO_AUTH | LOCAL_AUTH, "Display this message", StrNull, (void *)ShowCommands}, { NULL, NULL, NULL }, }; struct cmdtab * FindCommand(cmds, str, pmatch) struct cmdtab *cmds; char *str; int *pmatch; { int nmatch = 0; int len = strlen(str); struct cmdtab *found = NULL; while (cmds->func) { if (cmds->name && strncmp(str, cmds->name, len) == 0) { nmatch++; found = cmds; } else if (cmds->alias && strncmp(str, cmds->alias, len) == 0) { nmatch++; found = cmds; } cmds++; } *pmatch = nmatch; return(found); } int FindExec(cmdlist, argc, argv) struct cmdtab *cmdlist; int argc; char **argv; { struct cmdtab *cmd; int val = 1; int nmatch; cmd = FindCommand(cmdlist, *argv, &nmatch); if (nmatch > 1) printf("Ambiguous.\n"); else if (cmd && ( cmd->lauth & VarLocalAuth ) ) val = (cmd->func)(cmd, --argc, ++argv, cmd->args); else printf("what?\n"); return(val); } void Prompt(flag) int flag; { char *pconnect, *pauth; if (!(mode & MODE_INTER)) return; if (flag) printf("\n"); if ( VarLocalAuth == LOCAL_AUTH ) pauth = " ON "; else pauth = " on "; if (IpcpFsm.state == ST_OPENED && phase == PHASE_NETWORK) pconnect = "PPP"; else pconnect = "ppp"; printf("%s%s%s> ", pconnect, pauth, VarShortHost); fflush(stdout); } void DecodeCommand(buff, nb, prompt) char *buff; int nb; int prompt; { char *vector[20]; char **argv; int argc, val; char *cp; val = 1; if (nb > 0) { cp = buff + strcspn(buff, "\r\n"); if (cp) *cp = '\0'; { argc = MakeArgs(buff, &vector); argv = vector; if (argc > 0) val = FindExec(Commands, argc, argv); } } if (val && prompt) Prompt(0); } static int ShowCommand(list, argc, argv) struct cmdtab *list; int argc; char **argv; { int val = 1; if (argc > 0) val = FindExec(ShowCommands, argc, argv); else printf("Use ``show ?'' to get a list.\n"); return(val); } static int TerminalCommand() { if (LcpFsm.state > ST_CLOSED) { printf("LCP state is [%s]\n", StateNames[LcpFsm.state]); return(1); } if (!IsInteractive()) return(1); modem = OpenModem(mode); if (modem < 0) { printf("failed to open modem.\n"); modem = 0; return(1); } printf("Enter to terminal mode.\n"); printf("Type `~?' for help.\n"); TtyTermMode(); return(0); } static int QuitCommand(list, argc, argv) struct cmdtab *list; int argc; char **argv; { if (mode & (MODE_DIRECT|MODE_DEDICATED|MODE_AUTO)) { if (argc > 0 && (VarLocalAuth & LOCAL_AUTH)) { Cleanup(EX_NORMAL); } else { VarLocalAuth = LOCAL_NO_AUTH; close(netfd); close(1); dup2(2, 1); /* Have to have something here or the modem will be 1 */ netfd = -1; mode &= ~MODE_INTER; } } else Cleanup(EX_NORMAL); return(1); } static int CloseCommand() { LcpClose(); return(1); } static int DownCommand() { LcpDown(); return(1); } static int SetModemSpeed(list, argc, argv) struct cmdtab *list; int argc; char **argv; { int speed; if (argc > 0) { if (strcmp(*argv, "sync") == 0) { VarSpeed = 0; return(1); } speed = atoi(*argv); if (IntToSpeed(speed) != B0) { VarSpeed = speed; return(1); } printf("invalid speed.\n"); } return(1); } static int SetRedialTimeout(list, argc, argv) struct cmdtab *list; int argc; char **argv; { int timeout; int tries; if (argc == 1 || argc == 2 ) { if (strcasecmp(argv[0], "random") == 0) { VarRedialTimeout = -1; printf("Using random redial timeout.\n"); srandom(time(0)); } else { timeout = atoi(argv[0]); if (timeout >= 0) { VarRedialTimeout = timeout; } else { printf("invalid redial timeout\n"); printf("Usage: %s %s\n", list->name, list->syntax); } } if (argc == 2) { tries = atoi(argv[1]); if (tries >= 0) { VarDialTries = tries; } else { printf("invalid retry value\n"); printf("Usage: %s %s\n", list->name, list->syntax); } } } else { printf("Usage: %s %s\n", list->name, list->syntax); } return(1); } static int SetModemParity(list, argc, argv) struct cmdtab *list; int argc; char **argv; { int parity; if (argc > 0) { parity = ChangeParity(*argv); if (parity < 0) printf("Invalid parity.\n"); else VarParity = parity; } return(1); } static int SetDebugLevel(list, argc, argv) struct cmdtab *list; int argc; char **argv; { int level, w; for (level = 0; argc-- > 0; argv++) { if (isdigit(**argv)) { w = atoi(*argv); if (w < 0 || w >= MAXLOGLEVEL) { printf("invalid log level.\n"); break; } else level |= (1 << w); } else { for (w = 0; w < MAXLOGLEVEL; w++) { if (strcasecmp(*argv, LogLevelName[w]) == 0) { level |= (1 << w); continue; } } } } loglevel = level; return(1); } static int SetEscape(list, argc, argv) struct cmdtab *list; int argc; char **argv; { int code; for (code = 0; code < 33; code++) EscMap[code] = 0; while (argc-- > 0) { sscanf(*argv++, "%x", &code); code &= 0xff; EscMap[code >> 3] |= (1 << (code&7)); EscMap[32] = 1; } return(1); } static int SetInitialMRU(list, argc, argv) struct cmdtab *list; int argc; char **argv; { int mru; if (argc > 0) { mru = atoi(*argv); if (mru < 100) printf("given value is too small.\n"); else if (mru > MAX_MRU) printf("given value is too big.\n"); else VarMRU = mru; } return(1); } static int SetIdleTimeout(list, argc, argv) struct cmdtab *list; int argc; char **argv; { if (argc-- > 0) { VarIdleTimeout = atoi(*argv++); if (argc-- > 0) { VarLqrTimeout = atoi(*argv++); if (VarLqrTimeout < 1) VarLqrTimeout = 30; if (argc > 0) { VarRetryTimeout = atoi(*argv); if (VarRetryTimeout < 1 || VarRetryTimeout > 10) VarRetryTimeout = 3; } } } return(1); } struct in_addr GetIpAddr(cp) char *cp; { struct hostent *hp; struct in_addr ipaddr; hp = gethostbyname(cp); if (hp && hp->h_addrtype == AF_INET) bcopy(hp->h_addr, &ipaddr, hp->h_length); else if (inet_aton(cp, &ipaddr) == 0) ipaddr.s_addr = 0; return(ipaddr); } static int SetInterfaceAddr(list, argc, argv) struct cmdtab *list; int argc; char **argv; { DefMyAddress.ipaddr.s_addr = DefHisAddress.ipaddr.s_addr = 0L; if (argc > 0) { ParseAddr(argc, argv++, &DefMyAddress.ipaddr, &DefMyAddress.mask, &DefMyAddress.width); if (--argc > 0) { ParseAddr(argc, argv++, &DefHisAddress.ipaddr, &DefHisAddress.mask, &DefHisAddress.width); if (--argc > 0) { ifnetmask = GetIpAddr(*argv); if (--argc > 0) { ParseAddr(argc, argv++, &DefTriggerAddress.ipaddr, &DefTriggerAddress.mask, &DefTriggerAddress.width); } } } } /* * For backwards compatibility, 0.0.0.0 means any address. */ if (DefMyAddress.ipaddr.s_addr == 0) { DefMyAddress.mask.s_addr = 0; DefMyAddress.width = 0; } if (DefHisAddress.ipaddr.s_addr == 0) { DefHisAddress.mask.s_addr = 0; DefHisAddress.width = 0; } if ((mode & MODE_AUTO) || ((mode & MODE_DEDICATED) && dstsystem)) { OsSetIpaddress(DefMyAddress.ipaddr, DefHisAddress.ipaddr, ifnetmask); } return(1); } #define VAR_AUTHKEY 0 #define VAR_DIAL 1 #define VAR_LOGIN 2 #define VAR_AUTHNAME 3 #define VAR_DEVICE 4 #define VAR_ACCMAP 5 #define VAR_PHONE 6 static int SetVariable(list, argc, argv, param) struct cmdtab *list; int argc; char **argv; int param; { u_long map; if (argc > 0) { switch (param) { case VAR_AUTHKEY: strncpy(VarAuthKey, *argv, sizeof(VarAuthKey)-1); break; case VAR_AUTHNAME: strncpy(VarAuthName, *argv, sizeof(VarAuthName)-1); break; case VAR_DIAL: strncpy(VarDialScript, *argv, sizeof(VarDialScript)-1); break; case VAR_LOGIN: strncpy(VarLoginScript, *argv, sizeof(VarDialScript)-1); break; case VAR_DEVICE: strncpy(VarDevice, *argv, sizeof(VarDevice)-1); break; case VAR_ACCMAP: sscanf(*argv, "%lx", &map); VarAccmap = map; break; case VAR_PHONE: strncpy(VarPhoneList, *argv, sizeof(VarPhoneList)-1); strcpy(VarPhoneCopy, VarPhoneList); VarNextPhone = VarPhoneCopy; break; } } return(1); } static int SetOpenMode(list, argc, argv) struct cmdtab *list; int argc; char **argv; { if (argc > 0) { if (strcmp(*argv, "active") == 0) VarOpenMode = OPEN_ACTIVE; else if (strcmp(*argv, "passive") == 0) VarOpenMode = OPEN_PASSIVE; else printf("Invalid mode.\n"); } return(1); } static char StrChatStr[] = "chat-script"; static char StrValue[] = "value"; extern int SetIfilter(), SetOfilter(), SetDfilter(), SetAfilter(); struct cmdtab const SetCommands[] = { { "accmap", NULL, SetVariable, LOCAL_AUTH, "Set accmap value", "hex-value", (void *)VAR_ACCMAP}, { "afilter", NULL, SetAfilter, LOCAL_AUTH, "Set keep Alive filter", "..."}, { "authkey", "key", SetVariable, LOCAL_AUTH, "Set authentication key", "key", (void *)VAR_AUTHKEY}, { "authname", NULL, SetVariable, LOCAL_AUTH, "Set authentication name", "name", (void *)VAR_AUTHNAME}, { "debug", NULL, SetDebugLevel, LOCAL_AUTH, "Set debug level", StrValue}, { "device", "line", SetVariable, LOCAL_AUTH, "Set modem device name", "device-name", (void *)VAR_DEVICE}, { "dfilter", NULL, SetDfilter, LOCAL_AUTH, "Set demand filter", "..."}, { "dial", NULL, SetVariable, LOCAL_AUTH, "Set dialing script", StrChatStr, (void *)VAR_DIAL}, { "escape", NULL, SetEscape, LOCAL_AUTH, "Set escape characters", "hex-digit ..."}, { "ifaddr", NULL, SetInterfaceAddr, LOCAL_AUTH, "Set destination address", "[src-addr [dst-addr [netmask [trg-addr]]]]"}, { "ifilter", NULL, SetIfilter, LOCAL_AUTH, "Set input filter", "..."}, { "login", NULL, SetVariable, LOCAL_AUTH, "Set login script", StrChatStr, (void *)VAR_LOGIN }, { "mru", "mtu", SetInitialMRU, LOCAL_AUTH, "Set Initial MRU value", StrValue }, { "ofilter", NULL, SetOfilter, LOCAL_AUTH, "Set output filter", "..." }, { "openmode", NULL, SetOpenMode, LOCAL_AUTH, "Set open mode", "[active|passive]"}, { "parity", NULL, SetModemParity, LOCAL_AUTH, "Set modem parity", "[odd|even|none]"}, { "phone", NULL, SetVariable, LOCAL_AUTH, "Set telephone number(s)", "phone1[:phone2[...]]", (void *)VAR_PHONE }, { "speed", NULL, SetModemSpeed, LOCAL_AUTH, "Set modem speed", "speed"}, { "timeout", NULL, SetIdleTimeout, LOCAL_AUTH, "Set Idle timeout", StrValue}, { "redial", NULL, SetRedialTimeout, LOCAL_AUTH, "Set Redial timeout", "value|random [dial_attempts]"}, { "help", "?", HelpCommand, LOCAL_AUTH | LOCAL_NO_AUTH, "Display this message", StrNull, (void *)SetCommands}, { NULL, NULL, NULL }, }; static int SetCommand(list, argc, argv) struct cmdtab *list; int argc; char **argv; { int val = 1; if (argc > 0) val = FindExec(SetCommands, argc, argv); else printf("Use `set ?' to get a list or `set ? ' for syntax help.\n"); return(val); } static int AddCommand(list, argc, argv) struct cmdtab *list; int argc; char **argv; { struct in_addr dest, gateway, netmask; if (argc == 3) { dest = GetIpAddr(argv[0]); netmask = GetIpAddr(argv[1]); if (strcmp(argv[2], "HISADDR") == 0) gateway = IpcpInfo.his_ipaddr; else gateway = GetIpAddr(argv[2]); OsSetRoute(RTM_ADD, dest, gateway, netmask); } else { printf("Usage: %s %s\n", list->name, list->syntax); } return(1); } static int DeleteCommand(list, argc, argv) struct cmdtab *list; int argc; char **argv; { struct in_addr dest, gateway, netmask; if (argc >= 2) { dest = GetIpAddr(argv[0]); if (strcmp(argv[1], "HISADDR") == 0) gateway = IpcpInfo.his_ipaddr; else gateway = GetIpAddr(argv[1]); netmask.s_addr = 0; if (argc == 3) { if (inet_aton(argv[1], &netmask) == 0) { printf("bad netmask value.\n"); return(1); } } OsSetRoute(RTM_DELETE, dest, gateway, netmask); } else if (argc == 1 && strcmp(argv[0], "ALL") == 0) { DeleteIfRoutes(0); } else { printf("Usage: %s %s\n", list->name, list->syntax); } return(1); }