vdetelweb/vdetelweb.c

   1 /*
   2  *   VDETELWEB: VDE telnet and WEB interface
   3  *
   4  *   vdetelweb.c: main
   5  *
   6  *   Copyright 2005,2008 Virtual Square Team University of Bologna - Italy
   7  *   2005 written by Renzo Davoli
   8  *   --pidfile/-p and cleanup management by Mattia Belletti (C) 2004
   9  *                            (copied from vde_switch code).
  10  *   2008 updated Renzo Davoli
  11  *   2008 sha1sum by Marco Dalla Via
  12  *
  13  *   This program is free software; you can redistribute it and/or modify
  14  *   it under the terms of the GNU General Public License as published by
  15  *   the Free Software Foundation; either version 2 of the License, or
  16  *   (at your option) any later version.
  17  *
  18  *   This program is distributed in the hope that it will be useful,
  19  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  *   GNU General Public License for more details.
  22  *
  23  *   You should have received a copy of the GNU General Public License along
  24  *   with this program; if not, write to the Free Software Foundation, Inc.,
  25  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  26  *
  27  *   $Id$
  28  *
  29  */
  30 #include <config.h>
  31 #include <stdio.h>
  32 #include <signal.h>
  33 #include <stdarg.h>
  34 #include <syslog.h>
  35 #include <errno.h>
  36 #include <unistd.h>
  37 #include <netdb.h>
  38 #include <libgen.h>
  39 #include <unistd.h>
  40 #include <sys/types.h>
  41 #include <sys/socket.h>
  42 #include <sys/select.h>
  43 #include <sys/poll.h>
  44 #include <sys/wait.h>
  45 #include <sys/utsname.h>
  46 #include <linux/un.h>
  47 #include <netinet/in.h>
  48 #include <arpa/inet.h>
  49 #include <string.h>
  50 #include <getopt.h>
  51 #include <sys/stat.h>
  52 #include <fcntl.h>
  53 #include "vdetelweb.h"
  54 #include <lwipv6.h>
  55
  56 int daemonize;
  57 int telnet;
  58 int web;
  59 char *mgmt;
  60 char *banner;
  61 char *progname;
  62 char *prompt;
  63 int logok;
  64 static char *passwd;
  65 static char *pidfile = NULL;
  66 static char pidfile_path[_POSIX_PATH_MAX];
  67 struct stack *lwipstack;
  68
  69 #define MAXFD 16
  70 #define HASH_SIZE 40
  71 int npfd=0;
  72 struct pollfd pfd[MAXFD];
  73 voidfun fpfd[MAXFD];
  74 void *status[MAXFD];
  75
  76 #define ROOTCONFFILE "/etc/vde/vdetelwebrc"
  77
  78 /* This will be prefixed by getenv("HOME") */
  79 #define USERCONFFILE "/.vde/vdetelwebrc"
  80
  81 void printlog(int priority, const char *format, ...)
  82 {
  83         va_list arg;
  84
  85         va_start (arg, format);
  86
  87         if (logok)
  88                 vsyslog(priority,format,arg);
  89         else {
  90                 fprintf(stderr,"%s: ",progname);
  91                 vfprintf(stderr,format,arg);
  92                 fprintf(stderr,"\n");
  93         }
  94         va_end (arg);
  95 }
  96
  97
  98 static void cleanup(void)
  99 {
 100         if (lwipstack)
 101                 lwip_stack_free(lwipstack);
 102         if((pidfile != NULL) && unlink(pidfile_path) < 0) {
 103                 printlog(LOG_WARNING,"Couldn't remove pidfile '%s': %s", pidfile, strerror(errno));
 104         }
 105 }
 106
 107 int sha1passwdok(const char *pw) {
 108         char buf[HASH_SIZE + 1];
 109         int pfd_fc[2];
 110         int pfd_cf[2];
 111         pid_t pid;
 112
 113         pipe(pfd_fc);
 114         pipe(pfd_cf);
 115         pid = fork();
 116
 117         if (!pid) {
 118                 close(pfd_fc[1]);
 119                 close(pfd_cf[0]);
 120                 dup2(pfd_fc[0], STDIN_FILENO);
 121                 dup2(pfd_cf[1], STDOUT_FILENO);
 122
 123                 execl("/usr/bin/sha1sum", "/usr/bin/sha1sum", NULL);
 124                 exit(1);
 125         } else {
 126                 close(pfd_cf[1]);
 127                 close(pfd_fc[0]);
 128
 129                 write(pfd_fc[1], pw, strlen(pw));
 130                 close(pfd_fc[1]);
 131                 read(pfd_cf[0], buf, sizeof(buf));
 132                 close(pfd_cf[0]);
 133
 134                 waitpid(pid, NULL, 0);
 135                 return (strncmp(buf,passwd,strlen(passwd))==0);
 136         }
 137 }
 138
 139 static void sig_handler(int sig)
 140 {
 141         cleanup();
 142         signal(sig, SIG_DFL);
 143         kill(getpid(), sig);
 144 }
 145
 146 static void setsighandlers(void)
 147 {
 148         /* setting signal handlers.
 149          *    * sets clean termination for SIGHUP, SIGINT and SIGTERM, and simply
 150          *       * ignores all the others signals which could cause termination. */
 151         struct { int sig; const char *name; int ignore; } signals[] = {
 152                 { SIGHUP, "SIGHUP", 0 },
 153                 { SIGINT, "SIGINT", 0 },
 154                 { SIGPIPE, "SIGPIPE", 1 },
 155                 { SIGALRM, "SIGALRM", 1 },
 156                 { SIGTERM, "SIGTERM", 0 },
 157                 { SIGUSR1, "SIGUSR1", 1 },
 158                 { SIGUSR2, "SIGUSR2", 1 },
 159                 { SIGPOLL, "SIGPOLL", 1 },
 160                 { SIGPROF, "SIGPROF", 1 },
 161                 { SIGVTALRM, "SIGVTALRM", 1 },
 162 #ifdef SIGSTKFLT
 163                 { SIGSTKFLT, "SIGSTKFLT", 1 },
 164 #endif
 165                 { SIGIO, "SIGIO", 1 },
 166                 { SIGPWR, "SIGPWR", 1 },
 167 #ifdef SIGUNUSED
 168                 { SIGUNUSED, "SIGUNUSED", 1 },
 169 #endif
 170                 { 0, NULL, 0 }
 171         };
 172
 173         int i;
 174         for(i = 0; signals[i].sig != 0; i++)
 175                 if(signal(signals[i].sig,
 176                                         signals[i].ignore ? SIG_IGN : sig_handler) < 0)
 177                         perror("Setting handler");
 178 }
 179
 180 static void usage(char *progname) {
 181         fprintf (stderr,"Usage: %s [-w] [-t] [-d] [-n nodename] [-p pidfile] mgmt_socket\n"
 182                         "       %s [--web] [--telnet] [--daemon] [--nodename nodename] [--pidfile pidfile] mgmt_socket\n",progname,progname);
 183         exit(-1);
 184 }
 185
 186 void setprompt(char *ctrl,char *nodename)
 187 {
 188         char buf[BUFSIZE];
 189         if (nodename==NULL) {
 190                 struct utsname un;
 191                 uname(&un);
 192                 snprintf(buf,BUFSIZE,"VDE2@%s[%s]: ",un.nodename,ctrl);
 193         } else
 194                 snprintf(buf,BUFSIZE,"VDE2@%s[%s]: ",nodename,ctrl);
 195         prompt=strdup(buf);
 196 }
 197
 198 int openextravdem(void)
 199 {
 200         struct sockaddr_un sun;
 201         int fd,n;
 202         char buf[BUFSIZE+1];
 203         sun.sun_family=PF_UNIX;
 204         snprintf(sun.sun_path,UNIX_PATH_MAX,"%s",mgmt);
 205         fd=socket(PF_UNIX,SOCK_STREAM,0);
 206         if (connect(fd,(struct sockaddr *)(&sun),sizeof(sun)) < 0) {
 207                 printlog(LOG_ERR,"Error connecting to the management socket '%s': %s", mgmt, strerror(errno));
 208                 return(-1);
 209         }
 210         if ((n=read(fd,buf,BUFSIZE))<=0) {
 211                 printlog(LOG_ERR,"banner %s",strerror(errno));
 212                 return(-1);
 213         }
 214         return fd;
 215 }
 216
 217 int openvdem(char *mgmt,char *progname, struct netif **nif,char *nodename)
 218 {
 219         struct sockaddr_un sun;
 220         int fd,n;
 221         char buf[BUFSIZE+1],*line2,*ctrl;
 222         sun.sun_family=PF_UNIX;
 223         snprintf(sun.sun_path,UNIX_PATH_MAX,"%s",mgmt);
 224         fd=socket(PF_UNIX,SOCK_STREAM,0);
 225         if (connect(fd,(struct sockaddr *)(&sun),sizeof(sun)) < 0) {
 226                 printlog(LOG_ERR,"Error connecting to the management socket '%s': %s", mgmt, strerror(errno));
 227                 exit(-1);
 228         }
 229         if ((n=read(fd,buf,BUFSIZE))<=0) {
 230                 printlog(LOG_ERR,"Error reading banner from VDE switch: %s",strerror(errno));
 231                 exit(-1);
 232         }
 233         buf[n]=0;
 234         if ((ctrl=rindex(buf,'\n')) != NULL)
 235                 *ctrl=0;
 236         banner=strdup(buf);
 237         write(fd,"ds/showinfo\n",13);
 238         if ((n=read(fd,buf,BUFSIZE))<=0) {
 239                 printlog(LOG_ERR,"Error reading ctl socket from VDE switch: %s",strerror(errno));
 240                 exit(-1);
 241         }
 242         buf[n]=0;
 243         if ((line2=index(buf,'\n')) == NULL) {
 244                 printlog(LOG_ERR,"Error parsing first line of ctl socket information");
 245                 exit(-1);
 246         }
 247         line2++;
 248         if (strncmp(line2,"ctl dir ",8) != 0) {
 249                 printlog(LOG_ERR,"Error parsing ctl socket information");
 250                 exit(-1);
 251         }
 252         for(ctrl=line2+8;*ctrl!='\n' && ctrl<buf+n;ctrl++)
 253                 ;
 254         *ctrl=0;
 255         ctrl=line2+8;
 256         setprompt(ctrl,nodename);
 257         strcat(ctrl,"[0]");
 258         *nif=lwip_vdeif_add(lwipstack,ctrl);
 259         if (*nif == NULL) {
 260                 printlog(LOG_ERR,"Cannot connect to the VDE switch");
 261                 exit(-1);
 262         }
 263         lwip_ifup(*nif);
 264
 265         return fd;
 266 }
 267
 268 static void bitno2mask(unsigned char *addr,int bitno,int len)
 269 {
 270         int i;
 271         for(i=0;i<len;i++,bitno -= 8) {
 272                 if (bitno >= 8)
 273                         addr[i]=255;
 274                 else if (bitno <= 0)
 275                         addr[i]=0;
 276                 else
 277                         addr[i]=256 - (1<<(8-bitno));
 278         }
 279 }
 280
 281 static void sockaddr2ip_6addr(struct ip_addr *ipaddrp,unsigned char *addr)
 282 {
 283         IP6_ADDR(ipaddrp,
 284                         (addr[0]<<8)|addr[1],
 285                         (addr[2]<<8)|addr[3],
 286                         (addr[4]<<8)|addr[5],
 287                         (addr[6]<<8)|addr[7],
 288                         (addr[8]<<8)|addr[9],
 289                         (addr[10]<<8)|addr[11],
 290                         (addr[12]<<8)|addr[13],
 291                         (addr[14]<<8)|addr[15]);
 292 }
 293
 294 static void readip(char *arg,struct netif *nif,int af)
 295 {
 296         char *bit=rindex(arg,'/');
 297         if (bit == 0)
 298                 printlog(LOG_ERR,"IP addresses must include the netmask i.e. addr/maskbits");
 299         else {
 300                 int bitno=atoi(bit+1);
 301                 *bit=0;
 302                 struct addrinfo *res,hint;
 303                 struct ip_addr ipaddr,netmask;
 304                 int err;
 305                 memset(&hint,0,sizeof(hint));
 306                 hint.ai_family=af;
 307                 if ((err=getaddrinfo(arg,NULL,&hint,&res))!=0)
 308                         printlog(LOG_ERR,"IP address %s error %s",arg,gai_strerror(err));
 309                 else {
 310                         switch(res->ai_family) {
 311                                 case PF_INET:
 312                                         {
 313                                                 struct sockaddr_in *in=(struct sockaddr_in *)res->ai_addr;
 314                                                 int addrh=ntohl(in->sin_addr.s_addr);
 315                                                 unsigned char i,addr[4];
 316                                                 for (i=0;i<4;i++,addrh>>=8)
 317                                                         addr[3-i]=addrh;
 318                                                 IP64_ADDR(&ipaddr, addr[0],addr[1],addr[2],addr[3]);
 319                                                 bitno2mask(addr,bitno,4);
 320                                                 IP64_MASKADDR(&netmask, addr[0],addr[1],addr[2],addr[3]);
 321                                                 lwip_add_addr(nif,&ipaddr,&netmask);
 322                                         }
 323                                         break;
 324                                 case PF_INET6:
 325                                         {
 326                                                 struct sockaddr_in6 *in=(struct sockaddr_in6 *)res->ai_addr;
 327                                                 unsigned char *addr=in->sin6_addr.s6_addr;
 328                                                 sockaddr2ip_6addr(&ipaddr,addr);
 329                                                 bitno2mask(addr,bitno,16);
 330                                                 sockaddr2ip_6addr(&netmask,addr);
 331                                                 lwip_add_addr(nif,&ipaddr,&netmask);
 332                                         }
 333                                         break;
 334                                 default:
 335                                         printlog(LOG_ERR,"Unsupported Address Family: %s",arg);
 336                         }
 337                         freeaddrinfo(res);
 338                 }
 339         }
 340 }
 341
 342 static void readdefroute(char *arg,struct netif *nif,int af)
 343 {
 344         struct addrinfo *res,hint;
 345         struct ip_addr ipaddr;
 346         int err;
 347         memset(&hint,0,sizeof(hint));
 348         hint.ai_family=af;
 349         if ((err=getaddrinfo(arg,NULL,&hint,&res))!=0)
 350                 printlog(LOG_ERR,"IP address %s error %s",arg,gai_strerror(err));
 351         else {
 352                 switch(res->ai_family) {
 353                         case PF_INET:
 354                                 {
 355                                         struct sockaddr_in *in=(struct sockaddr_in *)res->ai_addr;
 356                                         int addrh=ntohl(in->sin_addr.s_addr);
 357                                         unsigned char i,addr[4];
 358                                         for (i=0;i<4;i++,addrh>>=8)
 359                                                 addr[3-i]=addrh;
 360                                         IP64_ADDR(&ipaddr, addr[0],addr[1],addr[2],addr[3]);
 361                                         lwip_add_route(lwipstack,IP_ADDR_ANY,IP_ADDR_ANY,&ipaddr,nif,0);
 362                                 }
 363                                 break;
 364                         case PF_INET6:
 365                                 {
 366                                         struct sockaddr_in6 *in=(struct sockaddr_in6 *)res->ai_addr;
 367                                         sockaddr2ip_6addr(&ipaddr,in->sin6_addr.s6_addr);
 368                                         lwip_add_route(lwipstack,IP_ADDR_ANY,IP_ADDR_ANY,&ipaddr,nif,0);
 369                                 }
 370                                 break;
 371                         default:
 372                                 printlog(LOG_ERR,"Unsupported Address Family: %s",arg);
 373                 }
 374                 freeaddrinfo(res);
 375         }
 376 }
 377
 378 static void readpassword(char *arg,int unused)
 379 {
 380         passwd=strdup(arg);
 381 }
 382
 383 struct cf {
 384         char *tag;
 385         void (*f)();
 386         int arg;
 387 } cft[]= {
 388         {"ip4",readip,PF_INET},
 389         {"ip6",readip,PF_INET6},
 390         {"ip",readip,0},
 391         {"defroute4",readdefroute,PF_INET},
 392         {"defroute6",readdefroute,PF_INET6},
 393         {"defroute",readdefroute,0},
 394         {"password",readpassword,0},
 395         {NULL,NULL,0}};
 396
 397 int readconffile(char *path,struct netif *nif)
 398 {
 399         FILE *f;
 400         char buf[BUFSIZE],*s;
 401         int line = 0;
 402
 403         if (path==NULL)
 404                 return -1;
 405         if((f=fopen(path,"r"))==NULL)
 406                 return -1;
 407         while (fgets(buf,BUFSIZE,f) != NULL)
 408         {
 409                 line++;
 410
 411                 if ((s=rindex(buf,'\n')) != NULL)
 412                         *s=0;
 413
 414                 for(s=buf;*s == ' ' || *s == '\t';s++);
 415
 416                 if (*s != '#' && *s != '\n' && *s != '\0')
 417                 {
 418                         struct cf *scf;
 419                         for (scf=cft;scf->tag != NULL;scf++)
 420                                 if(strncmp(s,scf->tag,strlen(scf->tag)) == 0)
 421                                 {
 422                                         s+=strlen(scf->tag);
 423                                         for(;*s == ' ' || *s == '\t';s++);
 424                                         if (*s == '=')
 425                                                 s++;
 426                                         for(;*s == ' ' || *s == '\t';s++);
 427                                         scf->f(s,nif,scf->arg);
 428                                         break;
 429                                 }
 430                         if (scf->tag == NULL)
 431                                 printlog(LOG_ERR,"Error parsing configuration file: line %d: %s", line, buf);
 432                 }
 433         }
 434         return 0;
 435 }
 436
 437 int addpfd(int fd,voidfun cb)
 438 {
 439         if (npfd < MAXFD) {
 440                 pfd[npfd].fd=fd;
 441                 pfd[npfd].events=POLLIN|POLLHUP;
 442                 pfd[npfd].revents=0;
 443                 fpfd[npfd]=cb;
 444                 npfd++;
 445         }
 446         return npfd-1;
 447 }
 448
 449 void delpfd(int fn)
 450 {
 451         int i=fn;
 452         for (i=fn;i<npfd-1;i++) {
 453                 pfd[i]=pfd[i+1];
 454                 fpfd[i]=fpfd[i+1];
 455                 status[i]=status[i+1];
 456         }
 457         npfd--;
 458 }
 459
 460 int pfdsearch(int fd)
 461 {
 462         int i;
 463         for (i=0;i<npfd && pfd[i].fd!=fd;i++)
 464                 ;
 465         return i;
 466 }
 467
 468 int setfds(fd_set *rds, fd_set *exc)
 469 {
 470         int i,max=0;
 471         FD_ZERO(rds);
 472         FD_ZERO(exc);
 473         for (i=0;i<npfd;i++) {
 474                 FD_SET(pfd[i].fd,rds);
 475                 FD_SET(pfd[i].fd,exc);
 476                 if (pfd[i].fd>max) max=pfd[i].fd;
 477         }
 478         return max+1;
 479 }
 480
 481 static void save_pidfile(void)
 482 {
 483         if(pidfile[0] != '/')
 484                 strncat(pidfile_path, pidfile, _POSIX_PATH_MAX - strlen(pidfile_path));
 485         else
 486                 strcpy(pidfile_path, pidfile);
 487
 488         int fd = open(pidfile_path,
 489                         O_WRONLY | O_CREAT | O_EXCL,
 490                         S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
 491         FILE *f;
 492
 493         if(fd == -1) {
 494                 printlog(LOG_ERR, "Error in pidfile creation: %s", strerror(errno));
 495                 exit(1);
 496         }
 497
 498         if((f = fdopen(fd, "w")) == NULL) {
 499                 printlog(LOG_ERR, "Error in FILE* construction: %s", strerror(errno));
 500                 exit(1);
 501         }
 502
 503         if(fprintf(f, "%ld\n", (long int)getpid()) <= 0) {
 504                 printlog(LOG_ERR, "Error in writing pidfile");
 505                 exit(1);
 506         }
 507
 508         fclose(f);
 509 }
 510
 511 /* this custom version of daemon(3) continue to receive stderr messages
 512  * until the end of the startup phase, the foreground process terminates
 513  * when stderr gets closed*/
 514 static int special_daemon(void)
 515 {
 516         int fd;
 517         int errorpipe[2];
 518         char buf[256];
 519         int n;
 520
 521         if (pipe(errorpipe))
 522                 return -1;
 523
 524         switch (fork()) {
 525                 case -1:
 526                         return (-1);
 527                 case 0:
 528                         break;
 529                 default:
 530                         close(errorpipe[1]);
 531                         while ((n=read(errorpipe[0],buf,128)) > 0) {
 532                                 write(STDERR_FILENO,buf,n);
 533                         }
 534                         _exit(0);
 535         }
 536         close(errorpipe[0]);
 537
 538         if (setsid() == -1)
 539                 return (-1);
 540
 541         (void)chdir("/");
 542
 543         if ((fd = open("/dev/null", O_RDWR, 0)) != -1) {
 544                 (void)dup2(fd, STDIN_FILENO);
 545                 (void)dup2(fd, STDOUT_FILENO);
 546                 (void)dup2(errorpipe[1], STDERR_FILENO);
 547                 close(errorpipe[1]);
 548                 if (fd > 2)
 549                         (void)close (fd);
 550         }
 551         return 0;
 552 }
 553
 554 int main(int argc, char *argv[])
 555 {
 556         struct netif *nif;
 557         int vdefd;
 558         char *conffile=NULL;
 559         char *nodename=NULL;
 560         int c;
 561
 562         progname=argv[0];
 563
 564         while (1) {
 565                 int option_index = 0;
 566
 567                 static struct option long_options[] = {
 568                         {"daemon", 0, 0, 'd'},
 569                         {"mgmt", 1, 0, 'M'},
 570                         {"telnet", 0, 0, 't'},
 571                         {"web", 0, 0, 'w'},
 572                         {"help",0,0,'h'},
 573                         {"rcfile",1,0,'f'},
 574                         {"nodename",1,0,'n'},
 575                         {"pidfile", 1, 0, 'p'},
 576                         {0, 0, 0, 0}
 577                 };
 578                 c = getopt_long_only (argc, argv, "hdwtM:f:n:",
 579                                 long_options, &option_index);
 580                 if (c == -1)
 581                         break;
 582
 583                 switch (c) {
 584                         case 'M':
 585                                 mgmt=strdup(optarg);
 586                                 break;
 587                         case 'f':
 588                                 conffile=strdup(optarg);
 589                                 break;
 590                         case 'n':
 591                                 nodename=strdup(optarg);
 592                                 break;
 593                         case 't':
 594                                 telnet=1;
 595                                 break;
 596                         case 'w':
 597                                 web=1;
 598                                 break;
 599                         case 'd':
 600                                 daemonize=1;
 601                                 break;
 602                         case 'p':
 603                                 pidfile=strdup(optarg);
 604                                 break;
 605                         case 'h':
 606                                 usage(argv[0]); //implies exit
 607                                 break;
 608                 }
 609         }
 610         if (optind < argc && mgmt==NULL)
 611                 mgmt=argv[optind];
 612
 613         if (mgmt==NULL) {
 614                 printlog(LOG_ERR,"mgmt_socket not defined");
 615                 exit(-1);
 616         }
 617         if (telnet==0 && web==0) {
 618                 printlog(LOG_ERR,"at least one service option (-t -w) must be specified");
 619                 exit(-1);
 620         }
 621
 622         atexit(cleanup);
 623         setsighandlers();
 624
 625         /* saves current path in pidfile_path, because otherwise with daemonize() we
 626          * forget it */
 627         if(getcwd(pidfile_path, _POSIX_PATH_MAX-1) == NULL) {
 628                 printlog(LOG_ERR, "getcwd: %s", strerror(errno));
 629                 exit(1);
 630         }
 631         strcat(pidfile_path, "/");
 632
 633         /* call daemon before starting the stack otherwise the stack threads
 634          * does not get inherited by the forked process */
 635         if (daemonize && special_daemon()) {
 636                 printlog(LOG_ERR,"daemon: %s",strerror(errno));
 637                 exit(1);
 638         }
 639
 640         lwipstack=lwip_stack_new();
 641         lwip_stack_set(lwipstack);
 642
 643         vdefd = openvdem(mgmt, argv[0], &nif, nodename);
 644
 645         /* If rcfile is specified, try it and nothing else */
 646         if (conffile && readconffile(conffile,nif) < 0)
 647         {
 648                 printlog(LOG_ERR, "Error reading configuration file '%s': %s", conffile, strerror(errno));
 649                 exit(1);
 650         }
 651         /* Else try default ones */
 652         else if (!conffile)
 653         {
 654                 int rv;
 655                 char *homedir = getenv("HOME");
 656                 if (homedir)
 657                 {
 658                         int len = strlen(homedir) + strlen(USERCONFFILE) + 1;
 659                         conffile = malloc(len);
 660                         snprintf(conffile, len, "%s%s", homedir, USERCONFFILE);
 661                         if ((rv = readconffile(conffile, nif)) >= 0)
 662                                 free(conffile);
 663                 }
 664                 if (!homedir || rv < 0)
 665                         rv = readconffile(conffile = ROOTCONFFILE, nif);
 666
 667                 if (rv < 0)
 668                 {
 669                         printlog(LOG_ERR, "Error reading configuration file '%s': %s", conffile, strerror(errno));
 670                         exit(1);
 671                 }
 672         }
 673
 674         /* once here, we're sure we're the true process which will continue as a
 675          * server: save PID file if needed */
 676         if(pidfile) save_pidfile();
 677
 678         if (telnet)
 679                 telnet_init(vdefd);
 680         if (web)
 681                 web_init(vdefd);
 682
 683         if (daemonize) {
 684                 int fd;
 685                 if ((fd=open("/dev/null",O_RDWR)) >= 0) {
 686                         close(STDERR_FILENO);
 687                         dup2(fd,STDERR_FILENO);
 688                         close(fd);
 689                         openlog(basename(argv[0]), LOG_PID, 0);
 690                         logok=1;
 691                 }
 692                 printlog(LOG_INFO,"VDETELWEB started");
 693         }
 694
 695         while (1)
 696         {
 697                 int n,m,i;
 698                 fd_set rds,exc;
 699                 int max=setfds(&rds,&exc);
 700                 m=lwip_select(max,&rds,NULL,&exc,NULL);
 701                 for(i=0; m>0 && i<max; i++) {
 702                         if (FD_ISSET(i,&rds) || FD_ISSET(i,&exc)) {
 703                                 n=pfdsearch(i);
 704                                 fpfd[n](n,i,vdefd);
 705                                 m--;
 706                         }
 707                 }
 708         }
 709 }
 710