vdetelweb-1.2.1/0000755000175000017500000000000011664673604012565 5ustar renzorenzovdetelweb-1.2.1/vdetelweb.c0000644000175000017500000003713411664673364014725 0ustar renzorenzo/* * VDETELWEB: VDE telnet and WEB interface * * vdetelweb.c: main * * Copyright 2005,2008 Virtual Square Team University of Bologna - Italy * 2005 written by Renzo Davoli * --pidfile/-p and cleanup management by Mattia Belletti (C) 2004 * (copied from vde_switch code). * 2008 updated Renzo Davoli * 2008 sha1sum by Marco Dalla Via * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY 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. * * $Id: vdetelweb.c 516 2011-11-28 11:44:35Z rd235 $ * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "vdetelweb.h" #include #include #include int daemonize; int telnet; int web; char *mgmt; char *banner; char *progname; char *prompt; int logok; static char *passwd; static char *pidfile = NULL; static char pidfile_path[_POSIX_PATH_MAX]; struct stack *lwipstack; #define MAXFD 16 #define HASH_SIZE 40 int npfd=0; struct pollfd pfd[MAXFD]; voidfun fpfd[MAXFD]; void *status[MAXFD]; #define ROOTCONFFILE "/etc/vde/vdetelwebrc" /* This will be prefixed by getenv("HOME") */ #define USERCONFFILE "/.vde/vdetelwebrc" void printlog(int priority, const char *format, ...) { va_list arg; va_start (arg, format); if (logok) vsyslog(priority,format,arg); else { fprintf(stderr,"%s: ",progname); vfprintf(stderr,format,arg); fprintf(stderr,"\n"); } va_end (arg); } static void cleanup(void) { if (lwipstack) lwip_stack_free(lwipstack); if((pidfile != NULL) && unlink(pidfile_path) < 0) { printlog(LOG_WARNING,"Couldn't remove pidfile '%s': %s", pidfile, strerror(errno)); } } static char hex[]="0123456789abcdef"; int sha1passwdok(const char *pw) { unsigned char out[mhash_get_block_size(MHASH_SHA1)]; char outstr[mhash_get_block_size(MHASH_SHA1)*2+1]; int i; MHASH td; td=mhash_init(MHASH_SHA1); mhash(td, pw, strlen(pw)); mhash_deinit(td, out); for (i=0; i> 4]; outstr[2*i+1]=hex[out[i] & 0xf]; } outstr[2*i]=0; return (memcmp(outstr,passwd,mhash_get_block_size(MHASH_SHA1))==0); } static void sig_handler(int sig) { cleanup(); signal(sig, SIG_DFL); kill(getpid(), sig); } static void setsighandlers(void) { /* setting signal handlers. * * sets clean termination for SIGHUP, SIGINT and SIGTERM, and simply * * ignores all the others signals which could cause termination. */ struct { int sig; const char *name; int ignore; } signals[] = { { SIGHUP, "SIGHUP", 0 }, { SIGINT, "SIGINT", 0 }, { SIGPIPE, "SIGPIPE", 1 }, { SIGALRM, "SIGALRM", 1 }, { SIGTERM, "SIGTERM", 0 }, { SIGUSR1, "SIGUSR1", 1 }, { SIGUSR2, "SIGUSR2", 1 }, { SIGPOLL, "SIGPOLL", 1 }, { SIGPROF, "SIGPROF", 1 }, { SIGVTALRM, "SIGVTALRM", 1 }, #ifdef SIGSTKFLT { SIGSTKFLT, "SIGSTKFLT", 1 }, #endif { SIGIO, "SIGIO", 1 }, { SIGPWR, "SIGPWR", 1 }, #ifdef SIGUNUSED { SIGUNUSED, "SIGUNUSED", 1 }, #endif { 0, NULL, 0 } }; int i; for(i = 0; signals[i].sig != 0; i++) if(signal(signals[i].sig, signals[i].ignore ? SIG_IGN : sig_handler) < 0) perror("Setting handler"); } static void usage(char *progname) { fprintf (stderr,"Usage: %s [-w] [-t] [-d] [-n nodename] [-p pidfile] mgmt_socket\n" " %s [--web] [--telnet] [--daemon] [--nodename nodename] [--pidfile pidfile] mgmt_socket\n",progname,progname); exit(-1); } void setprompt(char *ctrl,char *nodename) { char buf[BUFSIZE]; if (nodename==NULL) { struct utsname un; uname(&un); snprintf(buf,BUFSIZE,"VDE2@%s[%s]: ",un.nodename,ctrl); } else snprintf(buf,BUFSIZE,"VDE2@%s[%s]: ",nodename,ctrl); prompt=strdup(buf); } int openextravdem(void) { struct sockaddr_un sun; int fd,n; char buf[BUFSIZE+1]; sun.sun_family=PF_UNIX; snprintf(sun.sun_path,UNIX_PATH_MAX,"%s",mgmt); fd=socket(PF_UNIX,SOCK_STREAM,0); if (connect(fd,(struct sockaddr *)(&sun),sizeof(sun)) < 0) { printlog(LOG_ERR,"Error connecting to the management socket '%s': %s", mgmt, strerror(errno)); return(-1); } if ((n=read(fd,buf,BUFSIZE))<=0) { printlog(LOG_ERR,"banner %s",strerror(errno)); return(-1); } return fd; } int openvdem(char *mgmt,char *progname, struct netif **nif,char *nodename) { struct sockaddr_un sun; int fd,n; char buf[BUFSIZE+1],*line2,*ctrl; sun.sun_family=PF_UNIX; snprintf(sun.sun_path,UNIX_PATH_MAX,"%s",mgmt); fd=socket(PF_UNIX,SOCK_STREAM,0); if (connect(fd,(struct sockaddr *)(&sun),sizeof(sun)) < 0) { printlog(LOG_ERR,"Error connecting to the management socket '%s': %s", mgmt, strerror(errno)); exit(-1); } if ((n=read(fd,buf,BUFSIZE))<=0) { printlog(LOG_ERR,"Error reading banner from VDE switch: %s",strerror(errno)); exit(-1); } buf[n]=0; if ((ctrl=rindex(buf,'\n')) != NULL) *ctrl=0; banner=strdup(buf); write(fd,"ds/showinfo\n",13); if ((n=read(fd,buf,BUFSIZE))<=0) { printlog(LOG_ERR,"Error reading ctl socket from VDE switch: %s",strerror(errno)); exit(-1); } buf[n]=0; if ((line2=index(buf,'\n')) == NULL) { printlog(LOG_ERR,"Error parsing first line of ctl socket information"); exit(-1); } line2++; if (strncmp(line2,"ctl dir ",8) != 0) { printlog(LOG_ERR,"Error parsing ctl socket information"); exit(-1); } for(ctrl=line2+8;*ctrl!='\n' && ctrl= 8) addr[i]=255; else if (bitno <= 0) addr[i]=0; else addr[i]=256 - (1<<(8-bitno)); } } static void sockaddr2ip_6addr(struct ip_addr *ipaddrp,unsigned char *addr) { IP6_ADDR(ipaddrp, (addr[0]<<8)|addr[1], (addr[2]<<8)|addr[3], (addr[4]<<8)|addr[5], (addr[6]<<8)|addr[7], (addr[8]<<8)|addr[9], (addr[10]<<8)|addr[11], (addr[12]<<8)|addr[13], (addr[14]<<8)|addr[15]); } static void readip(char *arg,struct netif *nif,int af) { char *bit=rindex(arg,'/'); if (bit == 0) printlog(LOG_ERR,"IP addresses must include the netmask i.e. addr/maskbits"); else { int bitno=atoi(bit+1); *bit=0; struct addrinfo *res,hint; struct ip_addr ipaddr,netmask; int err; memset(&hint,0,sizeof(hint)); hint.ai_family=af; if ((err=getaddrinfo(arg,NULL,&hint,&res))!=0) printlog(LOG_ERR,"IP address %s error %s",arg,gai_strerror(err)); else { switch(res->ai_family) { case PF_INET: { struct sockaddr_in *in=(struct sockaddr_in *)res->ai_addr; int addrh=ntohl(in->sin_addr.s_addr); unsigned char i,addr[4]; for (i=0;i<4;i++,addrh>>=8) addr[3-i]=addrh; IP64_ADDR(&ipaddr, addr[0],addr[1],addr[2],addr[3]); bitno2mask(addr,bitno,4); IP64_MASKADDR(&netmask, addr[0],addr[1],addr[2],addr[3]); lwip_add_addr(nif,&ipaddr,&netmask); } break; case PF_INET6: { struct sockaddr_in6 *in=(struct sockaddr_in6 *)res->ai_addr; unsigned char *addr=in->sin6_addr.s6_addr; sockaddr2ip_6addr(&ipaddr,addr); bitno2mask(addr,bitno,16); sockaddr2ip_6addr(&netmask,addr); lwip_add_addr(nif,&ipaddr,&netmask); } break; default: printlog(LOG_ERR,"Unsupported Address Family: %s",arg); } freeaddrinfo(res); } } } static void readdefroute(char *arg,struct netif *nif,int af) { struct addrinfo *res,hint; struct ip_addr ipaddr; int err; memset(&hint,0,sizeof(hint)); hint.ai_family=af; if ((err=getaddrinfo(arg,NULL,&hint,&res))!=0) printlog(LOG_ERR,"IP address %s error %s",arg,gai_strerror(err)); else { switch(res->ai_family) { case PF_INET: { struct sockaddr_in *in=(struct sockaddr_in *)res->ai_addr; int addrh=ntohl(in->sin_addr.s_addr); unsigned char i,addr[4]; for (i=0;i<4;i++,addrh>>=8) addr[3-i]=addrh; IP64_ADDR(&ipaddr, addr[0],addr[1],addr[2],addr[3]); lwip_add_route(lwipstack,IP_ADDR_ANY,IP_ADDR_ANY,&ipaddr,nif,0); } break; case PF_INET6: { struct sockaddr_in6 *in=(struct sockaddr_in6 *)res->ai_addr; sockaddr2ip_6addr(&ipaddr,in->sin6_addr.s6_addr); lwip_add_route(lwipstack,IP_ADDR_ANY,IP_ADDR_ANY,&ipaddr,nif,0); } break; default: printlog(LOG_ERR,"Unsupported Address Family: %s",arg); } freeaddrinfo(res); } } static void readpassword(char *arg,int unused) { passwd=strdup(arg); } struct cf { char *tag; void (*f)(); int arg; } cft[]= { {"ip4",readip,PF_INET}, {"ip6",readip,PF_INET6}, {"ip",readip,0}, {"defroute4",readdefroute,PF_INET}, {"defroute6",readdefroute,PF_INET6}, {"defroute",readdefroute,0}, {"password",readpassword,0}, {NULL,NULL,0}}; int readconffile(char *path,struct netif *nif) { FILE *f; char buf[BUFSIZE],*s; int line = 0; if (path==NULL) return -1; if((f=fopen(path,"r"))==NULL) return -1; while (fgets(buf,BUFSIZE,f) != NULL) { line++; if ((s=rindex(buf,'\n')) != NULL) *s=0; for(s=buf;*s == ' ' || *s == '\t';s++); if (*s != '#' && *s != '\n' && *s != '\0') { struct cf *scf; for (scf=cft;scf->tag != NULL;scf++) if(strncmp(s,scf->tag,strlen(scf->tag)) == 0) { s+=strlen(scf->tag); for(;*s == ' ' || *s == '\t';s++); if (*s == '=') s++; for(;*s == ' ' || *s == '\t';s++); scf->f(s,nif,scf->arg); break; } if (scf->tag == NULL) printlog(LOG_ERR,"Error parsing configuration file: line %d: %s", line, buf); } } return 0; } int addpfd(int fd,voidfun cb) { if (npfd < MAXFD) { pfd[npfd].fd=fd; pfd[npfd].events=POLLIN|POLLHUP; pfd[npfd].revents=0; fpfd[npfd]=cb; npfd++; } return npfd-1; } void delpfd(int fn) { int i=fn; for (i=fn;imax) max=pfd[i].fd; } return max+1; } #endif static void save_pidfile(void) { if(pidfile[0] != '/') strncat(pidfile_path, pidfile, _POSIX_PATH_MAX - strlen(pidfile_path)); else strcpy(pidfile_path, pidfile); int fd = open(pidfile_path, O_WRONLY | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH); FILE *f; if(fd == -1) { printlog(LOG_ERR, "Error in pidfile creation: %s", strerror(errno)); exit(1); } if((f = fdopen(fd, "w")) == NULL) { printlog(LOG_ERR, "Error in FILE* construction: %s", strerror(errno)); exit(1); } if(fprintf(f, "%ld\n", (long int)getpid()) <= 0) { printlog(LOG_ERR, "Error in writing pidfile"); exit(1); } fclose(f); } /* this custom version of daemon(3) continue to receive stderr messages * until the end of the startup phase, the foreground process terminates * when stderr gets closed*/ static int special_daemon(void) { int fd; int errorpipe[2]; char buf[256]; int n; if (pipe(errorpipe)) return -1; switch (fork()) { case -1: return (-1); case 0: break; default: close(errorpipe[1]); while ((n=read(errorpipe[0],buf,128)) > 0) { write(STDERR_FILENO,buf,n); } _exit(0); } close(errorpipe[0]); if (setsid() == -1) return (-1); (void)chdir("/"); if ((fd = open("/dev/null", O_RDWR, 0)) != -1) { (void)dup2(fd, STDIN_FILENO); (void)dup2(fd, STDOUT_FILENO); (void)dup2(errorpipe[1], STDERR_FILENO); close(errorpipe[1]); if (fd > 2) (void)close (fd); } return 0; } int main(int argc, char *argv[]) { struct netif *nif; int vdefd; char *conffile=NULL; char *nodename=NULL; int c; progname=argv[0]; while (1) { int option_index = 0; static struct option long_options[] = { {"daemon", 0, 0, 'd'}, {"mgmt", 1, 0, 'M'}, {"telnet", 0, 0, 't'}, {"web", 0, 0, 'w'}, {"help",0,0,'h'}, {"rcfile",1,0,'f'}, {"nodename",1,0,'n'}, {"pidfile", 1, 0, 'p'}, {0, 0, 0, 0} }; c = getopt_long_only (argc, argv, "hdwtM:f:n:", long_options, &option_index); if (c == -1) break; switch (c) { case 'M': mgmt=strdup(optarg); break; case 'f': conffile=strdup(optarg); break; case 'n': nodename=strdup(optarg); break; case 't': telnet=1; break; case 'w': web=1; break; case 'd': daemonize=1; break; case 'p': pidfile=strdup(optarg); break; case 'h': usage(argv[0]); //implies exit break; } } if (optind < argc && mgmt==NULL) mgmt=argv[optind]; if (mgmt==NULL) { printlog(LOG_ERR,"mgmt_socket not defined"); exit(-1); } if (telnet==0 && web==0) { printlog(LOG_ERR,"at least one service option (-t -w) must be specified"); exit(-1); } atexit(cleanup); setsighandlers(); /* saves current path in pidfile_path, because otherwise with daemonize() we * forget it */ if(getcwd(pidfile_path, _POSIX_PATH_MAX-1) == NULL) { printlog(LOG_ERR, "getcwd: %s", strerror(errno)); exit(1); } strcat(pidfile_path, "/"); /* call daemon before starting the stack otherwise the stack threads * does not get inherited by the forked process */ if (daemonize && special_daemon()) { printlog(LOG_ERR,"daemon: %s",strerror(errno)); exit(1); } lwipstack=lwip_stack_new(); lwip_stack_set(lwipstack); vdefd = openvdem(mgmt, argv[0], &nif, nodename); /* If rcfile is specified, try it and nothing else */ if (conffile && readconffile(conffile,nif) < 0) { printlog(LOG_ERR, "Error reading configuration file '%s': %s", conffile, strerror(errno)); exit(1); } /* Else try default ones */ else if (!conffile) { int rv; char *homedir = getenv("HOME"); if (homedir) { int len = strlen(homedir) + strlen(USERCONFFILE) + 1; conffile = malloc(len); snprintf(conffile, len, "%s%s", homedir, USERCONFFILE); if ((rv = readconffile(conffile, nif)) >= 0) free(conffile); } if (!homedir || rv < 0) rv = readconffile(conffile = ROOTCONFFILE, nif); if (rv < 0) { printlog(LOG_ERR, "Error reading configuration file '%s': %s", conffile, strerror(errno)); exit(1); } } /* once here, we're sure we're the true process which will continue as a * server: save PID file if needed */ if(pidfile) save_pidfile(); if (telnet) telnet_init(vdefd); if (web) web_init(vdefd); if (daemonize) { int fd; if ((fd=open("/dev/null",O_RDWR)) >= 0) { close(STDERR_FILENO); dup2(fd,STDERR_FILENO); close(fd); openlog(basename(argv[0]), LOG_PID, 0); logok=1; } printlog(LOG_INFO,"VDETELWEB started"); } while (1) { int i; int m=lwip_poll(pfd,npfd,-1); for (i=0;i0;i++) { if (pfd[i].revents) { m--; fpfd[i](i,pfd[i].fd,vdefd); } } } } vdetelweb-1.2.1/config.h.in0000644000175000017500000000672111664673405014615 0ustar renzorenzo/* config.h.in. Generated from configure.ac by autoheader. */ /* Define to 1 if you have the header file. */ #undef HAVE_ARPA_INET_H /* Define to 1 if you have the `atexit' function. */ #undef HAVE_ATEXIT /* Define to 1 if you have the `bzero' function. */ #undef HAVE_BZERO /* Define to 1 if you don't have `vprintf' but do have `_doprnt.' */ #undef HAVE_DOPRNT /* Define to 1 if you have the header file. */ #undef HAVE_FCNTL_H /* Define to 1 if you have the `getcwd' function. */ #undef HAVE_GETCWD /* Define to 1 if you have the header file. */ #undef HAVE_INTTYPES_H /* Define to 1 if you have the `lwipv6' library (-llwipv6). */ #undef HAVE_LIBLWIPV6 /* Define to 1 if you have the `mhash' library (-lmhash). */ #undef HAVE_LIBMHASH /* Define to 1 if you have the header file. */ #undef HAVE_LWIPV6_H /* Define to 1 if your system has a GNU libc compatible `malloc' function, and to 0 otherwise. */ #undef HAVE_MALLOC /* Define to 1 if you have the header file. */ #undef HAVE_MEMORY_H /* Define to 1 if you have the `memset' function. */ #undef HAVE_MEMSET /* Define to 1 if you have the header file. */ #undef HAVE_NETDB_H /* Define to 1 if you have the header file. */ #undef HAVE_NETINET_IN_H /* Define to 1 if you have the `socket' function. */ #undef HAVE_SOCKET /* Define to 1 if you have the header file. */ #undef HAVE_STDINT_H /* Define to 1 if you have the header file. */ #undef HAVE_STDLIB_H /* Define to 1 if you have the `strdup' function. */ #undef HAVE_STRDUP /* Define to 1 if you have the `strerror' function. */ #undef HAVE_STRERROR /* Define to 1 if you have the header file. */ #undef HAVE_STRINGS_H /* Define to 1 if you have the header file. */ #undef HAVE_STRING_H /* Define to 1 if you have the `strndup' function. */ #undef HAVE_STRNDUP /* Define to 1 if you have the `strstr' function. */ #undef HAVE_STRSTR /* Define to 1 if you have the header file. */ #undef HAVE_SYSLOG_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_IOCTL_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_SOCKET_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_STAT_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_TYPES_H /* Define to 1 if you have the `uname' function. */ #undef HAVE_UNAME /* Define to 1 if you have the header file. */ #undef HAVE_UNISTD_H /* Define to 1 if you have the `vprintf' function. */ #undef HAVE_VPRINTF /* Name of package */ #undef PACKAGE /* Define to the address where bug reports for this package should be sent. */ #undef PACKAGE_BUGREPORT /* Define to the full name of this package. */ #undef PACKAGE_NAME /* Define to the full name and version of this package. */ #undef PACKAGE_STRING /* Define to the one symbol short name of this package. */ #undef PACKAGE_TARNAME /* Define to the home page for this package. */ #undef PACKAGE_URL /* Define to the version of this package. */ #undef PACKAGE_VERSION /* Define as the return type of signal handlers (`int' or `void'). */ #undef RETSIGTYPE /* Define to 1 if you have the ANSI C header files. */ #undef STDC_HEADERS /* Version number of package */ #undef VERSION /* Define to empty if `const' does not conform to ANSI C. */ #undef const /* Define to rpl_malloc if the replacement function should be used. */ #undef malloc vdetelweb-1.2.1/vdetelweb.10000644000175000017500000000546211664673364014642 0ustar renzorenzo.\" Copyright (c) 2004-2005 Renzo Davoli, 2008 Ludovico Gardenghi .\" .\" This is free documentation; you can redistribute it and/or .\" modify it under the terms of the GNU General Public License as .\" published by the Free Software Foundation; either version 2 of .\" the License, or (at your option) any later version. .\" .\" The GNU General Public License's references to "object code" .\" and "executables" are to be interpreted as the output of any .\" document formatting or typesetting system, including .\" intermediate and printed output. .\" .\" This manual is distributed in the hope that it will be useful, .\" but WITHOUT ANY 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 manual; if not, write to the Free .\" Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, .\" USA. .TH VDETELWEB 1 "June 16, 2008" "Virtual Distributed Ethernet" .SH NAME vdetelweb \- Virtual Distributed Ethernet Telnet and/or Web management module .SH SYNOPSIS .B vdetelweb [ .BI \-\-web ] [ .BI \-\-telnet ] [ .BI \-\-nodename .I nodename ] [ .BI \-\-daemon ] [ .BI \-\-rcfile .I rcfile ] .I mgmt_socket .br .SH DESCRIPTION \fBvdetelweb\fP implements a tiny telnet server and/or a tiny web server for the remote management of a VDE2 switch. .br .SH OPTIONS .TP .B \-w, \-\-web start the web server. At least one of \fB\-\-web\fP or \fB\-\-telnet\fP \fImust\fP be set. .TP .B \-t, \-\-telnet start the telnet server. At least one of \fB\-\-web\fP or \fB\-\-telnet\fP \fImust\fP be set. .TP .B \-n, \-\-nodename \fInodename\fP specify the nodename as seen from remote connections (e.g. in the command prompt or in the web page title). uname nodename is used when this option is not specified. .TP .B \-d, \-\-daemon run as a daemon, using syslog for logging. .TP .B \-f, \-\-rcfile \fIrcfile\fP rc file to set the initial switch configuration. When not specified, vdetelweb searches for \fI~/.vde/vdetelwebrc\fP and \fI/etc/vde/vdetelwebrc\fP. At leas one rc file must exist and be readable. .TP .B \-h, \-\-help print help. please use it for a more complete list of options. .TP .B \fImgmt_socket\fP is the managemnt socket used to communicate with the vde_switch. (This option must match the path used in the -M option for the vde_switch). .SH NOTICE Virtual Distributed Ethernet is not related in any way with www.vde.com ("Verband der Elektrotechnik, Elektronik und Informationstechnik" i.e. the German "Association for Electrical, Electronic & Information Technologies"). .SH SEE ALSO .BR vde_switch (1), .BR vde_plug (1), .BR vdeq (1). .BR dpipe (1). .BR unixterm (1). .br .SH AUTHOR VDE is a project by Renzo Davoli vdetelweb-1.2.1/vdetelwebrc0000644000175000017500000000116311664673364015022 0ustar renzorenzo### vdetelweb sample configuration file ## IP address and default gateway for the telnet/web server, using the default ## address family (probably IPv4) ip=192.168.250.6/24 defroute=192.168.250.1 ## The same but for specific address families # ip4=10.0.0.1/24 # defroute4=192.168.250.1 # ip6=2001:760:2e00:ff00::5556/64 # defroute6=2001:760:2e00:ff00::1 ## Password SHA1 hash for the "admin" telnet/web user. To create a new ## password use the following command: ## ## $ echo -n new_password | sha1sum ## ## and paste here the output. The sample password is "piripicchio". password=e8b32ad31b34a21d9fa638c2ee6cf52d46d5106b vdetelweb-1.2.1/README0000644000175000017500000000235511664673364013455 0ustar renzorenzoVDETELWEB Telnet and WEB interface for VDE2 Depends on the LWIPv6a library, available as a GPLv2 project from http://savannah.nongnu.org/projects/view-os How to install: % make # make install How to use: Create a vdetelwebrc file. the program searches for /etc/vde/vdetelwebrc and ~/etc/vde/vdetelwebrc. Different path for the rc file can be given by the -f option. *********************** Sample vdetelwebrc file ************************** #vdetelweb rc sample ip4=192.168.0.253/24 defroute4=192.168.0.1 password=e8b32ad31b34a21d9fa638c2ee6cf52d46d5106b *********************** END Sample vdetelwebrc file ************************** The password in the example is "piripicchio". The hash of the password has been obtained by the following command: $ echo -n piripicchio | sha1sum VDETELWEB creates a telnet and/or web interface to a running VDE switch. The switch must have been started with the remote mgmt option (-m). % vde_switch -M /tmp/vde.mgmt -daemon Launch the tool: % vdetelweb -t -w -f vdetelwebrc /tmp/vde.mgmt Now it is possible to use telnet or a browser to manage the switch. (c) 2005 Renzo Davoli - Department of Computer Science. University of Bologna. (c) 2008 Renzo Davoli, Marco Dalla Via. Editing of commands and sha1 passwd vdetelweb-1.2.1/install-sh0000755000175000017500000003253711664673406014603 0ustar renzorenzo#!/bin/sh # install - install a program, script, or datafile scriptversion=2009-04-28.21; # UTC # This originates from X11R5 (mit/util/scripts/install.sh), which was # later released in X11R6 (xc/config/util/install.sh) with the # following copyright and license. # # Copyright (C) 1994 X Consortium # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to # deal in the Software without restriction, including without limitation the # rights to use, copy, modify, merge, publish, distribute, sublicense, and/or # sell copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 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[-T] SRCFILE DSTFILE or: $0 [OPTION]... SRCFILES... DIRECTORY or: $0 [OPTION]... -t DIRECTORY SRCFILES... or: $0 [OPTION]... -d DIRECTORIES... In the 1st form, copy SRCFILE to DSTFILE. In the 2nd and 3rd, copy all SRCFILES to DIRECTORY. In the 4th, create DIRECTORIES. Options: --help display this help and exit. --version display version info and exit. -c (ignored) -C install only if different (preserve the last data modification time) -d create directories instead of installing files. -g GROUP $chgrpprog installed files to GROUP. -m MODE $chmodprog installed files to MODE. -o USER $chownprog installed files to USER. -s $stripprog installed files. -t DIRECTORY install into DIRECTORY. -T report an error if DSTFILE is a directory. Environment variables override the default commands: CHGRPPROG CHMODPROG CHOWNPROG CMPPROG CPPROG MKDIRPROG MVPROG RMPROG STRIPPROG " while test $# -ne 0; do case $1 in -c) ;; -C) copy_on_change=true;; -d) dir_arg=true;; -g) chgrpcmd="$chgrpprog $2" shift;; --help) echo "$usage"; exit $?;; -m) mode=$2 case $mode in *' '* | *' '* | *' '* | *'*'* | *'?'* | *'['*) echo "$0: invalid mode: $mode" >&2 exit 1;; esac shift;; -o) chowncmd="$chownprog $2" shift;; -s) stripcmd=$stripprog;; -t) dst_arg=$2 shift;; -T) no_target_directory=true;; --version) echo "$0 $scriptversion"; exit $?;; --) shift break;; -*) echo "$0: invalid option: $1" >&2 exit 1;; *) break;; esac shift done if test $# -ne 0 && test -z "$dir_arg$dst_arg"; then # When -d is used, all remaining arguments are directories to create. # When -t is used, the destination is already specified. # Otherwise, the last argument is the destination. Remove it from $@. for arg do if test -n "$dst_arg"; then # $@ is not empty: it contains at least $arg. set fnord "$@" "$dst_arg" shift # fnord fi shift # arg dst_arg=$arg done fi if test $# -eq 0; then if test -z "$dir_arg"; then echo "$0: no input file specified." >&2 exit 1 fi # It's OK to call `install-sh -d' without argument. # This can happen when creating conditional directories. exit 0 fi if test -z "$dir_arg"; then trap '(exit $?); exit' 1 2 13 15 # Set umask so as not to create temps with too-generous modes. # However, 'strip' requires both read and write access to temps. case $mode in # Optimize common cases. *644) cp_umask=133;; *755) cp_umask=22;; *[0-7]) if test -z "$stripcmd"; then u_plus_rw= else u_plus_rw='% 200' fi cp_umask=`expr '(' 777 - $mode % 1000 ')' $u_plus_rw`;; *) if test -z "$stripcmd"; then u_plus_rw= else u_plus_rw=,u+rw fi cp_umask=$mode$u_plus_rw;; esac fi for src do # Protect names starting with `-'. case $src in -*) src=./$src;; esac if test -n "$dir_arg"; then dst=$src dstdir=$dst test -d "$dstdir" dstdir_status=$? else # Waiting for this to be detected by the "$cpprog $src $dsttmp" command # might cause directories to be created, which would be especially bad # if $src (and thus $dsttmp) contains '*'. if test ! -f "$src" && test ! -d "$src"; then echo "$0: $src does not exist." >&2 exit 1 fi if test -z "$dst_arg"; then echo "$0: no destination specified." >&2 exit 1 fi dst=$dst_arg # Protect names starting with `-'. case $dst in -*) dst=./$dst;; esac # If destination is a directory, append the input filename; won't work # if double slashes aren't ignored. if test -d "$dst"; then if test -n "$no_target_directory"; then echo "$0: $dst_arg: Is a directory" >&2 exit 1 fi dstdir=$dst dst=$dstdir/`basename "$src"` dstdir_status=0 else # Prefer dirname, but fall back on a substitute if dirname fails. dstdir=` (dirname "$dst") 2>/dev/null || expr X"$dst" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \ X"$dst" : 'X\(//\)[^/]' \| \ X"$dst" : 'X\(//\)$' \| \ X"$dst" : 'X\(/\)' \| . 2>/dev/null || echo X"$dst" | sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{ s//\1/ q } /^X\(\/\/\)[^/].*/{ s//\1/ q } /^X\(\/\/\)$/{ s//\1/ q } /^X\(\/\).*/{ s//\1/ q } s/.*/./; q' ` test -d "$dstdir" dstdir_status=$? fi fi obsolete_mkdir_used=false if test $dstdir_status != 0; then case $posix_mkdir in '') # Create intermediate dirs using mode 755 as modified by the umask. # This is like FreeBSD 'install' as of 1997-10-28. umask=`umask` case $stripcmd.$umask in # Optimize common cases. *[2367][2367]) mkdir_umask=$umask;; .*0[02][02] | .[02][02] | .[02]) mkdir_umask=22;; *[0-7]) mkdir_umask=`expr $umask + 22 \ - $umask % 100 % 40 + $umask % 20 \ - $umask % 10 % 4 + $umask % 2 `;; *) mkdir_umask=$umask,go-w;; esac # With -d, create the new directory with the user-specified mode. # Otherwise, rely on $mkdir_umask. if test -n "$dir_arg"; then mkdir_mode=-m$mode else mkdir_mode= fi posix_mkdir=false case $umask in *[123567][0-7][0-7]) # POSIX mkdir -p sets u+wx bits regardless of umask, which # is incompatible with FreeBSD 'install' when (umask & 300) != 0. ;; *) tmpdir=${TMPDIR-/tmp}/ins$RANDOM-$$ trap 'ret=$?; rmdir "$tmpdir/d" "$tmpdir" 2>/dev/null; exit $ret' 0 if (umask $mkdir_umask && exec $mkdirprog $mkdir_mode -p -- "$tmpdir/d") >/dev/null 2>&1 then if test -z "$dir_arg" || { # Check for POSIX incompatibilities with -m. # HP-UX 11.23 and IRIX 6.5 mkdir -m -p sets group- or # other-writeable bit of parent directory when it shouldn't. # FreeBSD 6.1 mkdir -m -p sets mode of existing directory. ls_ld_tmpdir=`ls -ld "$tmpdir"` case $ls_ld_tmpdir in d????-?r-*) different_mode=700;; d????-?--*) different_mode=755;; *) false;; esac && $mkdirprog -m$different_mode -p -- "$tmpdir" && { ls_ld_tmpdir_1=`ls -ld "$tmpdir"` test "$ls_ld_tmpdir" = "$ls_ld_tmpdir_1" } } then posix_mkdir=: fi rmdir "$tmpdir/d" "$tmpdir" else # Remove any dirs left behind by ancient mkdir implementations. rmdir ./$mkdir_mode ./-p ./-- 2>/dev/null fi trap '' 0;; esac;; esac if $posix_mkdir && ( umask $mkdir_umask && $doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir" ) then : else # The umask is ridiculous, or mkdir does not conform to POSIX, # or it failed possibly due to a race condition. Create the # directory the slow way, step by step, checking for races as we go. case $dstdir in /*) prefix='/';; -*) prefix='./';; *) prefix='';; esac eval "$initialize_posix_glob" oIFS=$IFS IFS=/ $posix_glob set -f set fnord $dstdir shift $posix_glob set +f IFS=$oIFS prefixes= for d do test -z "$d" && continue prefix=$prefix$d if test -d "$prefix"; then prefixes= else if $posix_mkdir; then (umask=$mkdir_umask && $doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir") && break # Don't fail if two instances are running concurrently. test -d "$prefix" || exit 1 else case $prefix in *\'*) qprefix=`echo "$prefix" | sed "s/'/'\\\\\\\\''/g"`;; *) qprefix=$prefix;; esac prefixes="$prefixes '$qprefix'" fi fi prefix=$prefix/ done if test -n "$prefixes"; then # Don't fail if two instances are running concurrently. (umask $mkdir_umask && eval "\$doit_exec \$mkdirprog $prefixes") || test -d "$dstdir" || exit 1 obsolete_mkdir_used=true fi fi fi if test -n "$dir_arg"; then { test -z "$chowncmd" || $doit $chowncmd "$dst"; } && { test -z "$chgrpcmd" || $doit $chgrpcmd "$dst"; } && { test "$obsolete_mkdir_used$chowncmd$chgrpcmd" = false || test -z "$chmodcmd" || $doit $chmodcmd $mode "$dst"; } || exit 1 else # Make a couple of temp file names in the proper directory. dsttmp=$dstdir/_inst.$$_ rmtmp=$dstdir/_rm.$$_ # Trap to clean up those temp files at exit. trap 'ret=$?; rm -f "$dsttmp" "$rmtmp" && exit $ret' 0 # Copy the file name to the temp name. (umask $cp_umask && $doit_exec $cpprog "$src" "$dsttmp") && # and set any options; do chmod last to preserve setuid bits. # # If any of these fail, we abort the whole thing. If we want to # ignore errors from any of these, just make sure not to ignore # errors from the above "$doit $cpprog $src $dsttmp" command. # { test -z "$chowncmd" || $doit $chowncmd "$dsttmp"; } && { test -z "$chgrpcmd" || $doit $chgrpcmd "$dsttmp"; } && { test -z "$stripcmd" || $doit $stripcmd "$dsttmp"; } && { test -z "$chmodcmd" || $doit $chmodcmd $mode "$dsttmp"; } && # If -C, don't bother to copy if it wouldn't change the file. if $copy_on_change && old=`LC_ALL=C ls -dlL "$dst" 2>/dev/null` && new=`LC_ALL=C ls -dlL "$dsttmp" 2>/dev/null` && eval "$initialize_posix_glob" && $posix_glob set -f && set X $old && old=:$2:$4:$5:$6 && set X $new && new=:$2:$4:$5:$6 && $posix_glob set +f && test "$old" = "$new" && $cmpprog "$dst" "$dsttmp" >/dev/null 2>&1 then rm -f "$dsttmp" else # Rename the file to the real destination. $doit $mvcmd -f "$dsttmp" "$dst" 2>/dev/null || # The rename failed, perhaps because mv can't rename something else # to itself, or perhaps because mv is so ancient that it does not # support -f. { # Now remove or move aside any old file at destination location. # We try this two ways since rm can't unlink itself on some # systems and the destination file might be busy for other # reasons. In this case, the final cleanup might fail but the new # file should still install successfully. { test ! -f "$dst" || $doit $rmcmd -f "$dst" 2>/dev/null || { $doit $mvcmd -f "$dst" "$rmtmp" 2>/dev/null && { $doit $rmcmd -f "$rmtmp" 2>/dev/null; :; } } || { echo "$0: cannot unlink or rename $dst" >&2 (exit 1); exit 1 } } && # Now rename the file to the real destination. $doit $mvcmd "$dsttmp" "$dst" } fi || exit 1 trap '' 0 fi done # Local variables: # eval: (add-hook 'write-file-hooks 'time-stamp) # time-stamp-start: "scriptversion=" # time-stamp-format: "%:y-%02m-%02d.%02H" # time-stamp-time-zone: "UTC" # time-stamp-end: "; # UTC" # End: vdetelweb-1.2.1/telnet.c0000644000175000017500000001035111664673364014227 0ustar renzorenzo/* * VDETELWEB: VDE telnet and WEB interface * * telnet.c: telnet module * * Copyright 2005,2007 Renzo Davoli University of Bologna - Italy * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, version 2 of the License. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY 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. * * $Id: telnet.c 304 2008-07-29 07:44:08Z rd235 $ * */ #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "vdetelweb.h" #include #include #define TELNET_TCP_PORT 23 void telnetdata(int fn,int fd,int vdefd) { struct vdehiststat *vdehst=status[fn]; if (vdehist_term_to_mgmt(vdehst) != 0) { int termfd=vdehist_gettermfd(vdehst); int mgmtfd=vdehist_getmgmtfd(vdehst); delpfd(pfdsearch(termfd)); lwip_close(termfd); if (mgmtfd >= 0) { delpfd(mgmtfd); close(mgmtfd); } vdehist_free(vdehst); } } void telnet_vdedata(int fn,int fd,int vdefd) { struct vdehiststat *vdehst=status[fn]; vdehist_mgmt_to_term(vdehst); } char *telnet_logincmd(char *cmd,int len,struct vdehiststat *st) { int histstatus=vdehist_getstatus(st); int termfd=vdehist_gettermfd(st); switch (histstatus) { case HIST_NOCMD: while (cmd[len-1] == '\n') cmd[--len]=0; if (strcmp(cmd,"admin") != 0) { lwip_write(termfd,"login incorrect\r\n\r\nLogin: ",26); } else { lwip_write(termfd,"Password: ",11); vdehist_setstatus(st,HIST_PASSWDFLAG); } break; case HIST_PASSWDFLAG: case HIST_PASSWDFLAG+1: case HIST_PASSWDFLAG+2: while (cmd[len-1] == '\n') cmd[--len]=0; if (!sha1passwdok(cmd)) { histstatus++; vdehist_setstatus(st,histstatus); if (histstatus < (HIST_PASSWDFLAG + 3)) lwip_write(termfd,"\r\nlogin incorrect\r\n\r\nPassword: ",30); else return "logout"; } else { int newfn; int flags; int mgmtfd; vdehist_setstatus(st,HIST_COMMAND); mgmtfd=openextravdem(); if (mgmtfd >= 0) { vdehist_setmgmtfd(st,mgmtfd); flags = fcntl(mgmtfd, F_GETFL); flags |= O_NONBLOCK; fcntl(mgmtfd, F_SETFL, flags); newfn=addpfd(mgmtfd,telnet_vdedata); status[newfn]=st; } else return "logout"; lwip_write(termfd,"\r\n",2); lwip_write(termfd,prompt,strlen(prompt)); } } return NULL; } void telnetaccept(int fn,int fd,int vdefd) { struct sockaddr_in cli_addr; int newsockfd; unsigned int clilen; int newfn; clilen = sizeof(cli_addr); newsockfd = lwip_accept(fd, (struct sockaddr *) &cli_addr, &clilen); if (newsockfd < 0) { printlog(LOG_ERR,"telnet accept err: %s",strerror(errno)); } newfn=addpfd(newsockfd,telnetdata); status[newfn]=vdehist_new(newsockfd,-1); lwip_write(newsockfd,banner,strlen(banner)); lwip_write(newsockfd,"\r\nLogin: ",9); } void telnet_init(int vdefd) { int sockfd; struct sockaddr_in serv_addr; vdehist_termread=lwip_read; vdehist_termwrite=lwip_write; vdehist_logincmd=telnet_logincmd; sockfd=lwip_socket(AF_INET, SOCK_STREAM, 0); if (!sockfd) { printlog(LOG_ERR,"telnet socket err: %s",strerror(errno)); } bzero((char *) &serv_addr, sizeof(serv_addr)); serv_addr.sin_family = AF_INET; serv_addr.sin_addr.s_addr = htonl(INADDR_ANY); serv_addr.sin_port = htons(TELNET_TCP_PORT); if (lwip_bind(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0) { printlog(LOG_ERR,"telnet bind err: %s",strerror(errno)); } lwip_listen(sockfd, 5); addpfd(sockfd,telnetaccept); } vdetelweb-1.2.1/vdetelweb.h0000644000175000017500000000062611664673364014726 0ustar renzorenzo#ifndef _VDETELWEB_H #define _VDETELWEB_H #define BUFSIZE 1024 typedef void (*voidfun)(); extern void *status[]; extern char *banner; extern char *prompt; int sha1passwdok(const char *pw); int addpfd(int fd,voidfun cb); void delpfd(int fn); int pfdsearch(int fd); int openextravdem(); void telnet_init(int vdefd); void web_init(int vdefd); void printlog(int priority, const char *format, ...); #endif vdetelweb-1.2.1/COPYING0000644000175000017500000004312411664673364013627 0ustar renzorenzo GNU GENERAL PUBLIC LICENSE Version 2, June 1991 Copyright (C) 1989, 1991 Free Software Foundation, Inc. 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. 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If, as a consequence of a court judgment or allegation of patent infringement or for any other reason (not limited to patent issues), conditions are imposed on you (whether by court order, agreement or otherwise) that contradict the conditions of this License, they do not excuse you from the conditions of this License. If you cannot distribute so as to satisfy simultaneously your obligations under this License and any other pertinent obligations, then as a consequence you may not distribute the Program at all. For example, if a patent license would not permit royalty-free redistribution of the Program by all those who receive copies directly or indirectly through you, then the only way you could satisfy both it and this License would be to refrain entirely from distribution of the Program. If any portion of this section is held invalid or unenforceable under any particular circumstance, the balance of the section is intended to apply and the section as a whole is intended to apply in other circumstances. It is not the purpose of this section to induce you to infringe any patents or other property right claims or to contest validity of any such claims; this section has the sole purpose of protecting the integrity of the free software distribution system, which is implemented by public license practices. Many people have made generous contributions to the wide range of software distributed through that system in reliance on consistent application of that system; it is up to the author/donor to decide if he or she is willing to distribute software through any other system and a licensee cannot impose that choice. This section is intended to make thoroughly clear what is believed to be a consequence of the rest of this License. 8. If the distribution and/or use of the Program is restricted in certain countries either by patents or by copyrighted interfaces, the original copyright holder who places the Program under this License may add an explicit geographical distribution limitation excluding those countries, so that distribution is permitted only in or among countries not thus excluded. In such case, this License incorporates the limitation as if written in the body of this License. 9. The Free Software Foundation may publish revised and/or new versions of the General Public License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns. Each version is given a distinguishing version number. If the Program specifies a version number of this License which applies to it and "any later version", you have the option of following the terms and conditions either of that version or of any later version published by the Free Software Foundation. If the Program does not specify a version number of this License, you may choose any version ever published by the Free Software Foundation. 10. If you wish to incorporate parts of the Program into other free programs whose distribution conditions are different, write to the author to ask for permission. For software which is copyrighted by the Free Software Foundation, write to the Free Software Foundation; we sometimes make exceptions for this. Our decision will be guided by the two goals of preserving the free status of all derivatives of our free software and of promoting the sharing and reuse of software generally. NO WARRANTY 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. END OF TERMS AND CONDITIONS Appendix: How to Apply These Terms to Your New Programs If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms. To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively convey the exclusion of warranty; and each file should have at least the "copyright" line and a pointer to where the full notice is found. Copyright (C) 19yy This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY 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. Also add information on how to contact you by electronic and paper mail. If the program is interactive, make it output a short notice like this when it starts in an interactive mode: Gnomovision version 69, Copyright (C) 19yy name of author Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details. The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, the commands you use may be called something other than `show w' and `show c'; they could even be mouse-clicks or menu items--whatever suits your program. You should also get your employer (if you work as a programmer) or your school, if any, to sign a "copyright disclaimer" for the program, if necessary. Here is a sample; alter the names: Yoyodyne, Inc., hereby disclaims all copyright interest in the program `Gnomovision' (which makes passes at compilers) written by James Hacker. , 1 April 1989 Ty Coon, President of Vice This General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. 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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. * * $Id: web.c 288 2008-06-17 13:22:02Z rd235 $ * */ #include #include #define __USE_GNU #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "vdetelweb.h" #include #define WEB_TCP_PORT 80 #define WEB_IDENTIFY 0x0 #define WEB_AUTHORIZED 0x1 #define WEB_UNAUTHORIZED 0x2 #define WEB_OP_GET 0x0 #define WEB_OP_POST 0x1 #define WEB_OP_POSTDATA 0x2 const char b64_chars[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; //static char *base64passwd; struct webstat { unsigned char status; unsigned char op; unsigned int bodylen; char linebuf[BUFSIZE]; char path[BUFSIZE]; int bufindex; }; static void lowercase(char *s) { while (*s != 0) { *s = tolower(*s); s++; } } void encode64(const char *from, char *to, int tosize) { int convbuf; int n = strlen(from); while ((n > 0) && (tosize > 3)) { convbuf = *from; from++; n--; convbuf <<= 8; if (n > 0) convbuf |= *from; from++; n--; convbuf <<= 8; if (n > 0) convbuf |= *from; from++; n--; *(to++) = b64_chars[convbuf >> 18]; *(to++) = b64_chars[(convbuf >> 12) & 0x3f]; *(to++) = (n < -1) ? '=' : b64_chars[(convbuf >> 6) & 0x3f]; *(to++) = (n < 0) ? '=' : b64_chars[convbuf & 0x3f]; tosize -= 4; } *to = 0; } void decode64(const char *src, char *dest, int dest_size) { int convbuf; int l = strlen(src); char c_src[l]; char *c; int i, j; strcpy(c_src, src); /* Sostitute '=' (paddings) with 0 ['A'] */ while ((c = strchr(c_src, '=')) != NULL) *c = 'A'; /* Convert 4 byte in 6 bit (64) to 3 byte in 8 bit */ for (i = 0, j = 0; i < l; i += 4, j += 3) { convbuf = (((int)(strchr(b64_chars, c_src[i]) - b64_chars) << 18) + ((int)(strchr(b64_chars, c_src[i + 1]) - b64_chars) << 12) + ((int)(strchr(b64_chars, c_src[i + 2]) - b64_chars) << 6) + ((int)(strchr(b64_chars, c_src[i + 3]) - b64_chars))); dest[j] = ((convbuf >> 16) & 255); dest[j + 1] = ((convbuf >> 8) & 255); dest[j + 2] = ((convbuf & 255)); } dest[j] = '\0'; } #if 0 static void createbase64passwd() { char buf[BUFSIZE]; char buf64[BUFSIZE*4/3]; snprintf(buf,BUFSIZE,"admin:%s",passwd); encode64(buf,buf64,BUFSIZE*4/3); base64passwd=strdup(buf64); } #endif static void lwip_printf(int fd, const char *format, ...) { char outbuf[BUFSIZE]; va_list arg; va_start (arg, format); vsnprintf(outbuf,BUFSIZE,format,arg); lwip_write(fd,outbuf,strlen(outbuf)); } static void web_close(int fn,int fd) { //printf("web_close %d %d\n",fn,fd); free(status[fn]); delpfd(fn); lwip_close(fd); } static int vde_getanswer(voidfun f,void *arg,int vdefd) { char buf[BUFSIZE]; char linebuf[BUFSIZE+1]; int n=0,ib=0,il=0,indata=0,eoa=0; do { n=read(vdefd,buf,BUFSIZE); for(ib=0;ib= '0' && linebuf[1] <= '9' && linebuf[2] >= '0' && linebuf[2] <= '9' && linebuf[3] >= '0' && linebuf[3] <= '9') { f(arg,linebuf+5,il-5,0,atoi(linebuf)); eoa=atoi(linebuf); } } il=0; } } } while (!eoa); return(eoa); } struct vdesub { char *name; char *descr; char *syntax; struct vdesub *next; }; struct vdemenu { char *name; char *descr; struct vdesub *sub; struct vdemenu *next; }; static struct vdemenu *menuhead; static struct vdemenu *vde_findmenu(struct vdemenu *head,char *name) { if (head == NULL) return NULL; else if (strcmp(head->name,name)==0) return head; else return vde_findmenu(head->next,name); } static void vde_addsub(struct vdesub **headp,char *name,char *syntax,char *help) { if (*headp == NULL) { *headp=malloc(sizeof(struct vdesub)); if (*headp != NULL) { (*headp)->name=name; (*headp)->descr=help; (*headp)->syntax=syntax; (*headp)->next=NULL; } } else vde_addsub(&((*headp)->next),name,syntax,help); } static void vde_addcmd(struct vdemenu *head,char *menu,char *name,char *syntax,char *help) { if (head != NULL) { if (strcmp(head->name,menu) == 0) vde_addsub(&(head->sub),name,syntax,help); else vde_addcmd(head->next,menu,name,syntax,help); } } static void vde_addmenu(struct vdemenu **headp,char *name,char *help) { if (*headp == NULL) { *headp=malloc(sizeof(struct vdemenu)); if (*headp != NULL) { (*headp)->name=name; (*headp)->descr=help; (*headp)->sub=NULL; (*headp)->next=NULL; } } else vde_addmenu(&((*headp)->next),name,help); } static void vde_helpline(struct vdemenu **headp,char *buf,int len,int indata,int rv) { static int nl=0; static int syntaxpos,helppos; nl++; if (nl==2) { int i; for (i=0;i 2 && indata && (strncmp(buf,"debug",5) !=0 )) { char *name; char *syntax; char *help; int namelen; for (namelen=0;namelen0 && buf[syntaxpos+synlen-1]==' ';synlen--) ; name=strndup(buf+slash,namelen); if (synlen>0) syntax=strndup(buf+syntaxpos,synlen); else syntax=""; help=strndup(buf+helppos,len-helppos-2); vde_addcmd(*headp,buf,name,syntax,help); } } } } static struct vdemenu *vde_gethelp(int vdefd) { struct vdemenu *head=NULL; write(vdefd,"help\n",5); vde_getanswer(vde_helpline,&head,vdefd); return head; } static void lwip_showline(int *fdp,char *buf,int len,int indata,int rv) { if (indata) lwip_write(*fdp,buf,len); } static int lwip_showout(int fd, int vdefd) { return vde_getanswer(lwip_showline,&fd,vdefd); } static int hex2num(int c) { if (c>96) c-=32; c -='0'; if (c>9) c-=7; return c; } static char *uriconv(char *in) { char *s=in; char *t=in; while ((*t=*s) != 0) { if (*s=='+') *t=' '; if (*s=='%') { *t=(hex2num(*(s+1))<<4)+hex2num(*(s+2)); s+=2; } s++;t++; } return in; } static void postdata_parse(int fd,int vdefd,char *menu,char *postdata) { char cmdbuf[BUFSIZE]; int cmdlen,arglen,rv; char *postcmd,*cmd,*endcmd,*arg=NULL; /*printf("PD **%s**\n",postdata);*/ if ((postcmd=strstr(postdata,"X="))!=NULL) { /* enter in a text field (catched through the hidden button) */ cmd=NULL; while(postdata) { char *token=strsep(&postdata,"&"); int l=strlen(token); char *targ=index(token,'='); if(strncmp("X=",token,2) != 0) { if (targ+1 < token+l) { if(cmd==NULL) { char *point; if ((point=strstr(token,".arg")) != NULL) *point=0; cmd=token; arg=targ+1; } else cmd=""; } } } if(cmd!=NULL && *cmd != 0) { strncpy(cmdbuf,menu,BUFSIZE); strncat(cmdbuf,"/",BUFSIZE); strncat(cmdbuf,cmd,BUFSIZE); strncat(cmdbuf," ",BUFSIZE); strncat(cmdbuf,uriconv(arg),BUFSIZE); write(vdefd,cmdbuf,strlen(cmdbuf)); lwip_printf(fd,"

%s %s
",prompt,cmdbuf);
			rv=lwip_showout(fd,vdefd);
			lwip_printf(fd,"
Result: %s\r\n",strerror(rv-1000)); } } else if ((postcmd=strstr(postdata,"COMMAND="))!=NULL) { /* accept button */ postcmd+=8; for(cmdlen=0;postcmd[cmdlen] != '&' && postcmd[cmdlen] != 0; cmdlen++) ; strncpy(cmdbuf,menu,BUFSIZE); strncat(cmdbuf,"/",BUFSIZE); cmd=cmdbuf+strlen(cmdbuf); strncat(cmdbuf,postcmd,(BUFSIZE

%s %s
",prompt,cmdbuf);
		rv=lwip_showout(fd,vdefd);
		lwip_printf(fd,"
Result: %s\r\n",strerror(rv-1000)); } } static char css[]= "\r\n"; static char okmsg[]= "HTTP/1.1 200 OK\r\n" "Content-Type: text/html\r\n" "\r\n"; static char errmsg[]= "HTTP/1.1 404 Not Found\r\n" "Content-Type: text/html\r\n" "\r\n" "\r\n" "404 Not Found\r\n" "\r\n" "

Not Found

\r\n" "The requested URL was not found on this server.\r\n" "
VDE 2.0 WEB MGMT INTERFACE\r\n" "\r\n"; static void web_this_form(int fd,struct vdemenu *this) { struct vdesub *sub; for (sub=this->sub;sub!=NULL;sub=sub->next) { if (*(sub->syntax) == 0) { lwip_printf(fd, "\r\n" "\r\n" "\r\n" "%s\r\n", "COMMAND",sub->name,sub->descr); } else { lwip_printf(fd, "\r\n" "%s\r\n" "\r\n" "%s\r\n", "COMMAND",sub->name,sub->syntax,sub->name,sub->descr); } } } static void web_menu_index(int fd) { struct vdemenu *this; lwip_printf(fd,"

Home Page

\r\n"); for (this=menuhead;this!=NULL;this=this->next) lwip_printf(fd,"

%s

\r\n",this->name,this->name); } static void web_create_page(char *path,int fd,int vdefd,char *postdata) { struct vdemenu *this=NULL; char *tail; if ((tail=strstr(path,".html")) != NULL) *tail=0; if (*path==0 || ((this=vde_findmenu(menuhead,path)) != NULL)) { lwip_write(fd,okmsg,sizeof(okmsg)); lwip_printf(fd, "\r\n" "%s %s\r\n", prompt, (*path==0)?"Home Page":path); lwip_write(fd,css,sizeof(css)); lwip_printf(fd, "\r\n" "

%s %s

\r\n" "
", prompt, (*path==0)?"Home Page":this->descr); web_menu_index(fd); if (*path==0) {/* HOME PAGE */ int rv; write(vdefd,"showinfo\r\n",10); lwip_printf(fd, "
\r\n");
			rv=lwip_showout(fd,vdefd);
			lwip_printf(fd,"
\r\n"); if (rv != 1000) lwip_printf(fd,"%s\r\n",strerror(rv-1000)); } else { lwip_printf(fd, "
\r\n\r\n" "\r\n" "\r\n",path); web_this_form(fd,this); lwip_printf(fd,"
SyntaxArgs\r\n" "Description
\r\n"); if (postdata != NULL) { postdata_parse(fd,vdefd,path,postdata); } } lwip_printf(fd, "
\r\n" "
VDE 2.0 WEB MGMT INTERFACE\r\n" "\r\n"); } else lwip_write(fd,errmsg,sizeof(errmsg)); } static char authmsg[]= "HTTP/1.1 401 Authorization Required\r\n" "WWW-Authenticate: Basic realm=\""; //"Content-Length: 187\r\n" //"Connection: close\r\n" static char authmsg2[]= "\"\r\n" "Content-Type: text/html\r\n" "\r\n" "\r\n" "401 Authorization Required\r\n" "\r\n" "

Authorization Required

\r\n" "Login and Password required\r\n" "
\r\nVDE 2.0 WEB MGMT INTERFACE\r\n" "\r\n"; int web_core(int fn,int fd,int vdefd) { struct webstat *st=status[fn]; //printf("CORE %s\n",st->linebuf); if (st->op==WEB_OP_POSTDATA) { //printf("POSTDATA %s\n",st->linebuf); web_create_page(&(st->path[1]),fd,vdefd,st->linebuf); return 1; } else if (strncmp(st->linebuf,"GET",3) == 0) { //printf("GET %s\n",st->linebuf); sscanf(st->linebuf+4,"%s",st->path); st->op=WEB_OP_GET; return 0; } else if (strncmp(st->linebuf,"POST",3) == 0) { //printf("POST %s\n",st->linebuf); sscanf(st->linebuf+5,"%s",st->path); st->op=WEB_OP_POST; return 0; } else if (strncmp(st->linebuf,"Content-Length: ",16) == 0) { st->bodylen=atoi(st->linebuf+16); //printf("BODYLEN %d\n",st->bodylen); return 0; } else if (strncmp(st->linebuf,"Authorization: Basic",20) == 0) { char passwd_buf[BUFSIZE]; char *passwd_buf_shift; int len=strlen(st->linebuf); int k=20; while (st->linebuf[k] == ' ') k++; while (st->linebuf[len-1] == '\n' || st->linebuf[len-1] == '\r' || st->linebuf[len-1] == ' ') { len--; st->linebuf[len]=0; } /* SHA1 */ decode64((st->linebuf + k), passwd_buf, strlen(st->linebuf + k)); passwd_buf_shift = (char *)(strchr(passwd_buf, ':') + 1); if (sha1passwdok(passwd_buf_shift)) st->status=WEB_AUTHORIZED; return 0; } else if (st->linebuf[0]=='\n' || st->linebuf[0]=='\r') { switch (st->status) { case WEB_IDENTIFY: lwip_write(fd,authmsg,sizeof(authmsg)); lwip_write(fd,prompt,strlen(prompt)); lwip_write(fd,authmsg2,sizeof(authmsg2)); return 1; break; case WEB_AUTHORIZED: lowercase(st->path); if (strcmp(st->path,"/index.html") == 0) st->path[1]=0; if (st->op == WEB_OP_GET) { web_create_page(&(st->path[1]),fd,vdefd,NULL); return 1; } else { st->op=WEB_OP_POSTDATA; return 0; } default: return 0; } } else return 0; } void webdata(int fn,int fd,int vdefd) { char buf[BUFSIZE]; int n,i; struct webstat *st=status[fn]; n=lwip_read(fd,buf,BUFSIZE); if (n==0) { web_close(fn,fd); } else if (n<0) printlog(LOG_ERR,"web read err: %s",strerror(errno)); else { for (i=0;ibufindexlinebuf[(st->bufindex)++]=buf[i]; if (buf[i]=='\n' || (st->op==WEB_OP_POSTDATA && st->bufindex==st->bodylen)) { st->linebuf[(st->bufindex)]=0; if (web_core(fn,fd,vdefd)) { web_close(fn,fd); break; } else st->bufindex=0; } } } } void webaccept(int fn,int fd,int vdefd) { struct sockaddr_in cli_addr; int newsockfd; unsigned int clilen; struct webstat *st; int newfn; clilen = sizeof(cli_addr); newsockfd = lwip_accept(fd, (struct sockaddr *) &cli_addr, &clilen); if (newsockfd < 0) { printlog(LOG_ERR,"web accept err: %s",strerror(errno)); } newfn=addpfd(newsockfd,webdata); status[newfn]=st=malloc(sizeof(struct webstat)); st->status=WEB_IDENTIFY; st->op=0; st->bufindex=0; } void web_init(int vdefd) { int sockfd; struct sockaddr_in serv_addr; sockfd=lwip_socket(AF_INET, SOCK_STREAM, 0); if (!sockfd) { printlog(LOG_ERR,"web socket err: %s",strerror(errno)); } bzero((char *) &serv_addr, sizeof(serv_addr)); serv_addr.sin_family = AF_INET; serv_addr.sin_addr.s_addr = htonl(INADDR_ANY); serv_addr.sin_port = htons(WEB_TCP_PORT); if (lwip_bind(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0) { printlog(LOG_ERR,"web bind err: %s",strerror(errno)); } lwip_listen(sockfd, 5); //createbase64passwd(); menuhead=vde_gethelp(vdefd); addpfd(sockfd,webaccept); } vdetelweb-1.2.1/configure.ac0000644000175000017500000000200311664673364015051 0ustar renzorenzo# -*- Autoconf -*- # Process this file with autoconf to produce a configure script. AC_PREREQ(2.60) AC_INIT([vdetelweb], [1.2.1], [info@v2.cs.unibo.it]) AM_INIT_AUTOMAKE([foreign dist-bzip2]) AC_CONFIG_SRCDIR([vdetelweb.c]) AC_CONFIG_HEADER([config.h]) # Checks for programs. AC_PROG_CC AC_PROG_INSTALL # Checks for header files. AC_HEADER_STDC AC_CHECK_HEADERS([arpa/inet.h fcntl.h netdb.h netinet/in.h string.h sys/ioctl.h sys/socket.h syslog.h lwipv6.h],, AC_MSG_ERROR([required header file missing])) # Checks for typedefs, structures, and compiler characteristics. AC_C_CONST # Checks for library functions. AC_FUNC_MALLOC AC_TYPE_SIGNAL AC_FUNC_VPRINTF AC_CHECK_FUNCS([atexit bzero getcwd memset socket strdup strerror strndup strstr uname]) # Checks for libraries. AC_CHECK_LIB([lwipv6], [lwip_init],, AC_MSG_ERROR([liblwipv6 missing]), [-lpthread]) AC_CHECK_LIB([mhash], [mhash_init],, AC_MSG_ERROR([mhash missing]), [-lmhash]) AC_CONFIG_FILES([Makefile]) AC_OUTPUT vdetelweb-1.2.1/missing0000755000175000017500000002623311664673406014172 0ustar renzorenzo#! /bin/sh # Common stub for a few missing GNU programs while installing. scriptversion=2009-04-28.21; # UTC # Copyright (C) 1996, 1997, 1999, 2000, 2002, 2003, 2004, 2005, 2006, # 2008, 2009 Free Software Foundation, Inc. # Originally by Fran,cois Pinard , 1996. # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2, or (at your option) # any later version. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY 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, see . # As a special exception to the GNU General Public License, if you # distribute this file as part of a program that contains a # configuration script generated by Autoconf, you may include it under # the same distribution terms that you use for the rest of that program. if test $# -eq 0; then echo 1>&2 "Try \`$0 --help' for more information" exit 1 fi run=: sed_output='s/.* --output[ =]\([^ ]*\).*/\1/p' sed_minuso='s/.* -o \([^ ]*\).*/\1/p' # In the cases where this matters, `missing' is being run in the # srcdir already. if test -f configure.ac; then configure_ac=configure.ac else configure_ac=configure.in fi msg="missing on your system" case $1 in --run) # Try to run requested program, and just exit if it succeeds. run= shift "$@" && exit 0 # Exit code 63 means version mismatch. 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# UTC # Copyright (C) 1999, 2000, 2003, 2004, 2005, 2006, 2007, 2009 Free # Software Foundation, Inc. # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2, or (at your option) # any later version. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY 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, see . # As a special exception to the GNU General Public License, if you # distribute this file as part of a program that contains a # configuration script generated by Autoconf, you may include it under # the same distribution terms that you use for the rest of that program. # Originally written by Alexandre Oliva . case $1 in '') echo "$0: No command. Try \`$0 --help' for more information." 1>&2 exit 1; ;; -h | --h*) cat <<\EOF Usage: depcomp [--help] [--version] PROGRAM [ARGS] Run PROGRAMS ARGS to compile a file, generating dependencies as side-effects. Environment variables: depmode Dependency tracking mode. source Source file read by `PROGRAMS ARGS'. object Object file output by `PROGRAMS ARGS'. DEPDIR directory where to store dependencies. depfile Dependency file to output. tmpdepfile Temporary file to use when outputing dependencies. libtool Whether libtool is used (yes/no). Report bugs to . EOF exit $? ;; -v | --v*) echo "depcomp $scriptversion" exit $? ;; esac if test -z "$depmode" || test -z "$source" || test -z "$object"; then echo "depcomp: Variables source, object and depmode must be set" 1>&2 exit 1 fi # Dependencies for sub/bar.o or sub/bar.obj go into sub/.deps/bar.Po. depfile=${depfile-`echo "$object" | sed 's|[^\\/]*$|'${DEPDIR-.deps}'/&|;s|\.\([^.]*\)$|.P\1|;s|Pobj$|Po|'`} tmpdepfile=${tmpdepfile-`echo "$depfile" | sed 's/\.\([^.]*\)$/.T\1/'`} rm -f "$tmpdepfile" # Some modes work just like other modes, but use different flags. We # parameterize here, but still list the modes in the big case below, # to make depend.m4 easier to write. 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Note that the slowdown incurred here ## affects only configure: in makefiles, %FASTDEP% shortcuts this. for arg do case $arg in -c) set fnord "$@" -MT "$object" -MD -MP -MF "$tmpdepfile" "$arg" ;; *) set fnord "$@" "$arg" ;; esac shift # fnord shift # $arg done "$@" stat=$? if test $stat -eq 0; then : else rm -f "$tmpdepfile" exit $stat fi mv "$tmpdepfile" "$depfile" ;; gcc) ## There are various ways to get dependency output from gcc. Here's ## why we pick this rather obscure method: ## - Don't want to use -MD because we'd like the dependencies to end ## up in a subdir. Having to rename by hand is ugly. ## (We might end up doing this anyway to support other compilers.) ## - The DEPENDENCIES_OUTPUT environment variable makes gcc act like ## -MM, not -M (despite what the docs say). ## - Using -M directly means running the compiler twice (even worse ## than renaming). if test -z "$gccflag"; then gccflag=-MD, fi "$@" -Wp,"$gccflag$tmpdepfile" stat=$? if test $stat -eq 0; then : else rm -f "$tmpdepfile" exit $stat fi rm -f "$depfile" echo "$object : \\" > "$depfile" alpha=ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz ## The second -e expression handles DOS-style file names with drive letters. sed -e 's/^[^:]*: / /' \ -e 's/^['$alpha']:\/[^:]*: / /' < "$tmpdepfile" >> "$depfile" ## This next piece of magic avoids the `deleted header file' problem. ## The problem is that when a header file which appears in a .P file ## is deleted, the dependency causes make to die (because there is ## typically no way to rebuild the header). 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