removing the obsolete op/ code

svn:r45

src/op/.cvsignore

@@ -1,2 +0,0 @@
-Makefile
-Makefile.in

src/op/Makefile.am

@@ -1,11 +0,0 @@
-
-bin_PROGRAMS = op
-
-op_LDADD = -L../common -lor
-
-op_SOURCES = args.c config.c op.c routers.c auth.c ss.c \
-             buffers.c crypto.c
-
-noinst_HEADERS = args.h auth.h buffers.h config.h crypto.h op.h \
-                 routers.h ss.h
-

src/op/args.c

@@ -1,121 +0,0 @@
-/**
- * args.c 
- * Routines for processing command-line arguments.
- *
- * Matej Pfajfar <mp292@cam.ac.uk>
- */
-
-/*
- * Changes :
- * $Log$
- * Revision 1.1  2002/06/26 22:45:50  arma
- * Initial revision
- *
- * Revision 1.3  2002/01/26 22:08:40  mp292
- * Reviewed according to Secure-Programs-HOWTO.
- *
- * Revision 1.2  2001/12/14 11:26:23  badbytes
- * Tested
- *
- * Revision 1.1  2001/12/13 15:15:10  badbytes
- * Started coding the onion proxy.
- *
- */
-
-#include <unistd.h>
-#include <ctype.h>
-
-#include "../common/log.h"
-#include "args.h"
-
-/* prints help on using op */
-void print_usage()
-{
-  char *program = "op";
-  
-  printf("\n%s - Onion Proxy for Onion Routing.\nUsage : %s -f config -p port [-l loglevel -h]\n-h : display this help\n-f config : config file\n-p port : port number which %s should bind to\n-l loglevel : logging threshold; one of alert|crit|err|warning|notice|info|debug\n\n", program,program,program);
-}
-
-/* get command-line arguments */
-int getargs(int argc, char *argv[], char *args, unsigned short *p, char **conf_filename, int *loglevel)
-{
-  char c; /* next option character */
-  char *errtest = NULL; /* for detecting strtoul() errors */
-  int gotf=0; int gotp=0;
-  
-  if ((!args) || (!conf_filename) || (!loglevel)) /* invalid parameters */
-    return -1;
-  
-  while ((c = getopt(argc,argv,args)) != -1)
-  {
-    switch(c)
-    {
-     case 'f': /* config file */
-      *conf_filename = optarg;
-      gotf=1;
-      break;
-     case 'p':
-      *p = (u_short)strtoul(optarg,&errtest,0);
-      if (errtest == optarg) /* error */
-      {
-	log(LOG_ERR,"Error : -p must be followed by an unsigned positive integer value. See help (-h).");
-        return -1;
-      }
-      gotp=1;
-      break;
-     case 'h':
-      print_usage();
-      exit(0);
-     case 'l':
-      if (!strcmp(optarg,"emerg"))
-	*loglevel = LOG_EMERG;
-      else if (!strcmp(optarg,"alert"))
-	*loglevel = LOG_ALERT;
-      else if (!strcmp(optarg,"crit"))
-	*loglevel = LOG_CRIT;
-      else if (!strcmp(optarg,"err"))
-	*loglevel = LOG_ERR;
-      else if (!strcmp(optarg,"warning"))
-	*loglevel = LOG_WARNING;
-      else if (!strcmp(optarg,"notice"))
-	*loglevel = LOG_NOTICE;
-      else if (!strcmp(optarg,"info"))
-	*loglevel = LOG_INFO;
-      else if (!strcmp(optarg,"debug"))
-	*loglevel = LOG_DEBUG;
-      else
-      {
-	log(LOG_ERR,"Error : argument to -l must be one of alert|crit|err|warning|notice|info|debug.");
-	print_usage();
-	return -1;
-      }
-      break;
-     case '?':
-      if (isprint(c))
-	log(LOG_ERR,"Missing argument or unknown option '-%c'. See help (-h).",optopt);
-      else
-	log(LOG_ERR,"Unknown option character 'x%x'. See help (-h).",optopt);
-      print_usage();
-      return -1;
-      break;
-     default:
-      return -1;
-    }
-  }
-  
-  /* the -f option is mandatory */
-  if (!gotf)
-  {
-    log(LOG_ERR,"You must specify a config file with the -f option. See help (-h).");
-    return -1;
-  }
-  
-  /* the -p option is mandatory */
-  if (!gotp)
-  {
-    log(LOG_ERR,"You must specify a port with the -p option. See help (-h).");
-    return -1;
-  }
-    
-  return 0;
-}

src/op/args.h

@@ -1,41 +0,0 @@
-/**
- * args.h 
- * Routines for processing command-line arguments.
- *
- * Matej Pfajfar <mp292@cam.ac.uk>
- */
-
-/*
- * Changes :
- * $Log$
- * Revision 1.1  2002/06/26 22:45:50  arma
- * Initial revision
- *
- * Revision 1.4  2002/01/26 22:22:09  mp292
- * Prevented duplicate definitions.
- *
- * Revision 1.3  2002/01/26 22:08:40  mp292
- * Reviewed according to Secure-Programs-HOWTO.
- *
- * Revision 1.2  2001/12/14 11:26:23  badbytes
- * Tested
- *
- * Revision 1.1  2001/12/13 15:15:10  badbytes
- * Started coding the onion proxy.
- *
- */
-
-#ifndef __ARGS_H
-
-#define __ARGS_H
-
-#include <stdlib.h>
-#include <stdio.h>
-
-/* print help */
-void print_usage();
-
-/* get command-line arguments */
-int getargs(int argc,char *argv[], char *args, unsigned short *p, char **conf_filename, int *loglevel);
-
-#endif

src/op/auth.c

@@ -1,85 +0,0 @@
-/**
- * auth.h
- * Key exchange with an onion router.
- *
- * Matej Pfajfar <mp292@cam.ac.uk>
- */
-
-/*
- * Changes :
- * $Log$
- * Revision 1.1  2002/06/26 22:45:50  arma
- * Initial revision
- *
- * Revision 1.1  2002/03/28 11:00:57  badbytes
- * Key exchange with an onion router.
- *
- */
-#include <openssl/rand.h>
-#include <string.h>
-#include <unistd.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-
-#include "../common/log.h"
-
-#include "auth.h"
-
-/* send session keys and bandwidth info to the router */
-int send_auth(int or_sock, uint32_t bandwidth, RSA *pkey, unsigned char *f_session_key, unsigned char *b_session_key)
-{
-  int retval;
-  int x;
-  unsigned char message[20]; /* bandwidth(32bits), forward key(64bits), backward key(64bits) */
-  unsigned char cipher[128];
-  if ((or_sock <= 0) || (bandwidth <= 0) || !pkey || !f_session_key || !b_session_key) /* invalid parameters */
-    return -1;
-  
-  bandwidth = htonl(bandwidth); /* convert to network order */
-  
-  /* generate the session keys */
-  retval = RAND_bytes(f_session_key, 8);
-  if (!retval)
-  {
-    log(LOG_ERR,"Not enough randomness to generate a session key.");
-    return -1;
-  }
-  retval = RAND_bytes(b_session_key, 8);
-  if (!retval)
-  {
-    log(LOG_ERR,"Not enough randomness to generate a session key.");
-    return -1;
-  }
-  
-  /* compose the message */
-  memcpy((void *)message, (void *)&bandwidth, 4);
-  memcpy((void *)(message + 4), (void *)f_session_key, 8);
-  memcpy((void *)(message + 12), (void *)b_session_key, 8);
-  printf("f_session_key: ");
-  for(x=0;x<8;x++) {
-    printf("%d ",f_session_key[x]);
-  }
-  printf("\nb_session_key: ");
-  for(x=0;x<8;x++) {
-    printf("%d ",b_session_key[x]);
-  }
-  printf("\n");
-  
-  /* encrypt with RSA */
-  retval = RSA_public_encrypt(20, message, cipher, pkey, RSA_PKCS1_PADDING);
-  if (retval == -1)
-  {
-    log(LOG_ERR,"Public key encryption failed.");
-    return -1;
-  }
-  
-  /* send the ciphertext */
-  retval = send(or_sock, cipher, 128, 0);
-  if (retval < 128)
-  {
-    log(LOG_ERR,"Connection to router lost while exchanging session keys.");
-    return -1;
-  }
-  
-  return 0;
-}

src/op/auth.h

@@ -1,23 +0,0 @@
-/**
- * auth.h
- * Key exchange with an onion router.
- *
- * Matej Pfajfar <mp292@cam.ac.uk>
- */
-
-/*
- * Changes :
- * $Log$
- * Revision 1.1  2002/06/26 22:45:50  arma
- * Initial revision
- *
- * Revision 1.1  2002/03/28 11:00:57  badbytes
- * Key exchange with an onion router.
- *
- */
-
-#include <openssl/rsa.h>
-#include <stdint.h>
-
-/* send session keys and bandwidth info to the router */
-int send_auth(int or_sock, uint32_t bandwidth, RSA *pkey, unsigned char *f_session_key, unsigned char *b_session_key);

src/op/buffers.c

@@ -1,146 +0,0 @@
-/**
- * buffers.c
- * Buffers.
- *
- * Matej Pfajfar <mp292@cam.ac.uk>
- */
-
-/*
- * Changes :
- * $Log$
- * Revision 1.1  2002/06/26 22:45:50  arma
- * Initial revision
- *
- * Revision 1.1  2002/04/02 14:28:01  badbytes
- * Final finishes.
- *
- */
-
-
-#include <unistd.h>
-#include <openssl/evp.h>
-
-#include "../common/cell.h"
-#include "../common/log.h"
-
-#include "buffers.h"
-#include "crypto.h"
-#include "op.h"
-
-int buffer_data(uint16_t aci, unsigned char *buf, size_t buflen, unsigned char **outbuf, size_t *outbuflen, size_t *outbuf_dataoffset, size_t *outbuf_datalen, crypt_path_t **cpath, size_t cpathlen)
-{
-  int retval;
-  int i;
-  cell_t *cellbuf;
-  cell_t *c;
-  size_t cellbuflen;
-  size_t cells;
-  unsigned char *tmpbuf; /* temporary buffer for realloc() operations */
-  
-  if (!buf || !outbuf || !outbuflen) /* invalid parameters */
-    return -1;
-  
-  /* split the plaintext into DATA cells */
-  retval = pack_data(aci,buf, buflen, (unsigned char **)&cellbuf, &cellbuflen);
-  if (retval == -1)
-  {
-    log(LOG_DEBUG,"buffer_data() : Could not pack data into cells.");
-    return -1;
-  }
-  log(LOG_DEBUG,"buffer_data() : DATA cells created.");
-  
-  cells = cellbuflen/(sizeof(cell_t));
-  /* encrypt the cells */
-  for (i=0; i<cells; i++)
-  {
-    c = cellbuf+i;
-    /* encrypt the payload length */
-    retval = crypt_f((unsigned char *)&c->length, 1, cpath, cpathlen);
-    if (retval == -1)
-    {
-      log(LOG_ERR,"Could not encrypt the payload length of a DATA cell.");
-      free((void *)cellbuf);
-      return -1;
-    }
-    /* encrypt the payload */
-    retval = crypt_f((unsigned char *)c->payload, CELL_PAYLOAD_SIZE, cpath, cpathlen);
-    if (retval == -1)
-    {
-      log(LOG_ERR,"Could not encrypt the payload of a DATA cell.");
-      free((void *)cellbuf);
-      return -1;
-    }
-  }
-
-  /* now copy the cells into the output buffer */
-  if (*outbuflen-*outbuf_dataoffset-*outbuf_datalen < cellbuflen) /* increase the buffer size if necessary */
-  {
-    /* allocate a new buffer (in OP_DEFAULT_BUFSIZE chunks)*/
-    tmpbuf = (unsigned char *)malloc(((cellbuflen+*outbuf_datalen)/OP_DEFAULT_BUFSIZE+1)*OP_DEFAULT_BUFSIZE);
-    if (!tmpbuf)
-    {
-      log(LOG_ERR,"Error allocating memory.");
-      free((void *)cellbuf);
-      return -1;
-    }
-    /* copy old data to the new buffer */
-    memcpy((void *)tmpbuf,(void *)(*outbuf+*outbuf_dataoffset),*outbuf_datalen);
-    /* replace the old buffer with the new one */
-    if (*outbuf)
-      free((void *)*outbuf);
-    *outbuf = tmpbuf;
-    *outbuflen = ((cellbuflen+*outbuf_datalen)/OP_DEFAULT_BUFSIZE+1) * OP_DEFAULT_BUFSIZE;
-    *outbuf_dataoffset = 0;
-  }
-  memcpy((void *)(*outbuf + *outbuf_dataoffset + *outbuf_datalen), (void *)cellbuf, cellbuflen);
-  *outbuf_datalen += cellbuflen;
-  
-  return 0;
-}
-
-int buffer_create(uint16_t aci, unsigned char *onion, size_t onionlen, unsigned char **outbuf, size_t *outbuflen, size_t *outbuf_dataoffset, size_t *outbuf_datalen, crypt_path_t **cpath, size_t cpathlen)
-{
-  int retval;
-  cell_t *cellbuf;
-  size_t cells;
-  size_t cellbuflen;
-  unsigned char *tmpbuf; /* temporary buffer for realloc() operations */
-  
-  if (!onion || !outbuf || !outbuflen || !outbuf_dataoffset || !outbuf_datalen) /* invalid parameters */
-    return -1;
-  
-  retval = pack_create(aci,onion, onionlen, (unsigned char **)&cellbuf, &cellbuflen);
-  if (retval == -1)
-  {
-    log(LOG_DEBUG,"buffer_create() : Could not pack the onion into cells.");
-    return -1;
-  }
-  log(LOG_DEBUG,"buffer_create() : CREATE cells created.");
-
-  cells = cellbuflen/(sizeof(cell_t));
-
-  /* now copy the cells into the output buffer */
-  if (*outbuflen-*outbuf_dataoffset-*outbuf_datalen < cellbuflen) /* increase the buffer size if necessary */
-  {
-    /* allocate a new buffer (in OP_DEFAULT_BUFSIZE chunks)*/
-    tmpbuf = (unsigned char *)malloc(((cellbuflen+*outbuf_datalen)/OP_DEFAULT_BUFSIZE+1)*OP_DEFAULT_BUFSIZE);
-    if (!tmpbuf)
-    {
-      log(LOG_ERR,"Error allocating memory.");
-      free((void *)cellbuf);
-      return -1;
-    }
-    /* copy old data to the new buffer */
-    memcpy((void *)tmpbuf,(void *)(*outbuf+*outbuf_dataoffset),*outbuf_datalen);
-    /* replace the old buffer with the new one */
-    if (*outbuf)
-      free((void *)*outbuf);
-    *outbuf = tmpbuf;
-    *outbuflen = ((cellbuflen+*outbuf_datalen)/OP_DEFAULT_BUFSIZE+1) * OP_DEFAULT_BUFSIZE;
-    *outbuf_dataoffset = 0;
-  }
-  memcpy((void *)(*outbuf + *outbuf_dataoffset + *outbuf_datalen), (void *)cellbuf, cellbuflen);
-  *outbuf_datalen += cellbuflen;
-  
-  return 0;
-}

src/op/buffers.h

@@ -1,25 +0,0 @@
-/**
- * buffers.h
- * Buffers.
- *
- * Matej Pfajfar <mp292@cam.ac.uk>
- */
-
-/*
- * Changes :
- * $Log$
- * Revision 1.1  2002/06/26 22:45:50  arma
- * Initial revision
- *
- * Revision 1.1  2002/04/02 14:28:01  badbytes
- * Final finishes.
- *
- */
-
-
-#include <stdint.h>
-
-#include "../common/onion.h"
-
-int buffer_data(uint16_t aci, unsigned char *buf, size_t buflen, unsigned char **outbuf, size_t *outbuflen, size_t *outbuf_dataoffset, size_t *outbuf_datalen, crypt_path_t **cpath, size_t cpathlen);
-int buffer_create(uint16_t aci, unsigned char *onion, size_t onionlen, unsigned char **outbuf, size_t *outbuflen, size_t *outbuf_dataoffset, size_t *outbuf_datalen, crypt_path_t **cpath, size_t cpathlen);

src/op/config.c

@@ -1,49 +0,0 @@
-/**
- * config.c 
- * Routines for loading the configuration file.
- *
- * Matej Pfajfar <mp292@cam.ac.uk>
- */
-
-/*
- * Changes :
- * $Log$
- * Revision 1.1  2002/06/26 22:45:50  arma
- * Initial revision
- *
- * Revision 1.3  2002/04/02 14:28:01  badbytes
- * Final finishes.
- *
- * Revision 1.2  2002/01/26 22:09:53  mp292
- * Reviewed according to Secure-Programs-HOWTO.
- *
- * Revision 1.1  2001/12/13 15:15:10  badbytes
- * Started coding the onion proxy.
- *
- */
-
-#include "config.h"
-#include "../common/log.h"
-
-/* loads the configuration file */
-int getconfig(char *conf_filename, config_opt_t *options)
-{
-  FILE *cf = NULL;
-  int retval = 0;
-
-  if ((!conf_filename) || (!options))
-    return -1;
-  
-  /* load config file */
-  cf = open_config(conf_filename);
-  if (!cf)
-  {
-    log(LOG_ERR,"Could not open configuration file %s.",conf_filename);
-    return -1;
-  }
-  retval = parse_config(cf,options);
-  if (retval)
-    return -1;
-
-  return 0;
-}

src/op/config.h

@@ -1,30 +0,0 @@
-/**
- * config.h 
- * Routines for loading the configuration file.
- *
- * Matej Pfajfar <mp292@cam.ac.uk>
- */
-
-/*
- * Changes :
- * $Log$
- * Revision 1.1  2002/06/26 22:45:50  arma
- * Initial revision
- *
- * Revision 1.4  2002/04/02 14:28:01  badbytes
- * Final finishes.
- *
- * Revision 1.3  2002/01/26 22:55:11  mp292
- * *** empty log message ***
- *
- * Revision 1.2  2002/01/26 22:22:09  mp292
- * Prevented duplicate definitions.
- *
- * Revision 1.1  2001/12/13 15:15:10  badbytes
- * Started coding the onion proxy.
- *
- */
-#include "../common/config.h"
-
-/* loads the configuration file */
-int getconfig(char *filename, config_opt_t *options);

src/op/crypto.c

@@ -1,104 +0,0 @@
-/**
- * crypto.c
- * Crypto calls.
- *
- * Matej Pfajfar <mp292@cam.ac.uk>
- */
-
-/*
- * Changes :
- * $Log$
- * Revision 1.1  2002/06/26 22:45:50  arma
- * Initial revision
- *
- * Revision 1.1  2002/04/02 14:28:01  badbytes
- * Final finishes.
- *
- */
-
-#include <malloc.h>
-#include <unistd.h>
-#include <openssl/err.h>
-#include <openssl/evp.h>
-
-#include "../common/log.h"
-
-#include "crypto.h"
-
-int crypt_f(unsigned char *buf, size_t buflen, crypt_path_t **cpath, size_t cpathlen)
-{
-  int i=0;
-  int retval = 0;
-  unsigned char *ciphertext = NULL;
-  crypt_path_t *thishop;
-  
-  /* allocate the ciphertext buffer */
-  ciphertext = (unsigned char *)malloc(buflen);
-  if (!ciphertext)
-  {
-    log(LOG_ERR,"Error allocating memory.");
-    return -1;
-  }
-  
-  for (i=0; i < cpathlen; i++) /* moving from last to first hop 
-				* Remember : cpath is in reverse order, i.e. last hop first
-				*/
-  {
-    log(LOG_DEBUG,"crypt_f() : Processing hop %u",cpathlen-i);
-    thishop = cpath[i];
-    
-    /* encrypt */
-    retval = EVP_EncryptUpdate(&thishop->f_ctx,ciphertext, &buflen, buf, buflen);
-    if (!retval) /* error */
-    {
-      log(LOG_ERR,"Error performing encryption:%s",ERR_reason_error_string(ERR_get_error()));
-      free(ciphertext);
-      return -1;
-    }
-    
-    /* copy ciphertext back to buf */
-    memcpy((void *)buf,(void *)ciphertext,buflen);
-  }
-  free((void *)ciphertext);
-
-  return 0;
-}
- 
-int crypt_b(unsigned char *buf, size_t buflen, crypt_path_t **cpath, size_t cpathlen)
-{
-  int i=0;
-  int retval=0;
-  unsigned char *plaintext=NULL;
-  crypt_path_t *thishop;
-
-  /* allocate the plaintext buffer */
-  plaintext = (unsigned char *)malloc(buflen);
-  if (!plaintext)
-  {
-    log(LOG_ERR,"Error allocating memory.");
-    return -1;
-  }
-  
-  for (i=cpathlen-1; i >= 0; i--) /* moving from first to last hop 
-				* Remember : cpath is in reverse order, i.e. last hop first
-				*/
-  {
-    thishop = cpath[i];
-    
-    /* encrypt */
-    retval = EVP_DecryptUpdate(&thishop->b_ctx,plaintext, &buflen, buf, buflen);
-    if (!retval) /* error */
-    {
-      log(LOG_ERR,"Error performing decryption:%s",ERR_reason_error_string(ERR_get_error()));
-      free(plaintext);
-      return -1;
-    }
-    
-    /* copy plaintext back to buf */
-    memcpy((void *)buf,(void *)plaintext,buflen);
-  }
-  
-  free(plaintext);
-  
-  return 0;
-}

src/op/crypto.h

@@ -1,23 +0,0 @@
-/**
- * crypto.h
- * Crypto calls.
- *
- * Matej Pfajfar <mp292@cam.ac.uk>
- */
-
-/*
- * Changes :
- * $Log$
- * Revision 1.1  2002/06/26 22:45:50  arma
- * Initial revision
- *
- * Revision 1.1  2002/04/02 14:28:01  badbytes
- * Final finishes.
- *
- */
-
-#include "../common/onion.h"
-
-int crypt_f(unsigned char *buf, size_t buflen, crypt_path_t **cpath, size_t cpathlen);
-
-int crypt_b(unsigned char *buf, size_t buflen, crypt_path_t **cpath, size_t cpathlen);

src/op/op.c

@@ -1,920 +0,0 @@
-/**
- * op.c 
- * Onion Proxy
- *
- * Matej Pfajfar <mp292@cam.ac.uk>
- */
-
-/*
- * Changes :
- * $Log$
- * Revision 1.2  2002/07/12 18:14:16  montrose
- * removed loglevel from global namespace. severity level is set using log() with a NULL format argument now. example: log(LOG_ERR,NULL);
- *
- * Revision 1.1.1.1  2002/06/26 22:45:50  arma
- * initial commit: current code
- *
- * Revision 1.37  2002/06/14 20:45:56  mp292
- * *** empty log message ***
- *
- * Revision 1.36  2002/04/02 14:28:01  badbytes
- * Final finishes.
- *
- * Revision 1.35  2002/04/02 10:21:07  badbytes
- * *** empty log message ***
- *
- * Revision 1.34  2002/03/29 08:35:12  badbytes
- * Link encryption is now done on the entire cell header for simplicity.
- *
- * Revision 1.33  2002/03/28 17:57:59  badbytes
- * Bug fix.
- *
- * Revision 1.32  2002/03/28 11:01:43  badbytes
- * Now does link-encryption and link-padding.
- *
- * Revision 1.31  2002/03/12 23:40:32  mp292
- * Started on op<->router connection padding.
- *
- * Revision 1.30  2002/01/29 02:22:58  mp292
- * Put a timeout on all network I/O.
- *
- * Revision 1.29  2002/01/26 23:01:55  mp292
- * Reviewed according to Secure-Programs-HOWTO.
- *
- * Revision 1.28  2002/01/18 20:42:06  mp292
- * Reflects changes to common/onion.c:new_route()
- *
- * Revision 1.27  2002/01/17 23:49:15  mp292
- * Added size of public key to one of the debugging messages.
- *
- * Revision 1.26  2002/01/16 23:01:58  mp292
- * First phase of system testing completed (main functionality).
- *
- * Revision 1.25  2002/01/16 17:01:56  mp292
- * There was a bug in checking whether the incoming connection is local or not.
- *
- * Revision 1.24  2002/01/16 16:09:32  mp292
- * A pointer cast was missing. Fixed.
- *
- * Revision 1.23  2002/01/14 13:05:39  badbytes
- * System testing in progress.
- *
- * Revision 1.22  2002/01/11 15:47:25  badbytes
- * *** empty log message ***
- *
- * Revision 1.21  2002/01/09 09:18:35  badbytes
- * Now handles EINTR error from accept().
- *
- * Revision 1.20  2002/01/09 07:57:18  badbytes
- * Ciphers got out of sync, hopefully fixed.
- *
- * Revision 1.19  2001/12/19 11:15:41  badbytes
- * Corrected AF_INET to PF_INET in socket() calls.
- *
- * Revision 1.18  2001/12/19 08:38:38  badbytes
- * Zombie problems hopefully fixed.
- *
- * Revision 1.17  2001/12/19 08:29:29  badbytes
- * Tested. Still some problems with zombies in both op and smtpap.
- *
- * Revision 1.16  2001/12/18 15:51:58  badbytes
- * Connection with onion router established. Will continue testing tomorrow.
- *
- * Revision 1.15  2001/12/18 14:12:05  badbytes
- * Tested up to connect() to onion router.
- *
- * Revision 1.14  2001/12/18 12:21:11  badbytes
- * Forgot to convert port to network order :-)
- *
- * Revision 1.13  2001/12/18 11:52:27  badbytes
- * Coding completed. Proceeding to test.
- *
- * Revision 1.12  2001/12/17 13:36:15  badbytes
- * Writing handle_connection()
- *
- * Revision 1.11  2001/12/17 08:42:44  badbytes
- * getrouters() now returns an array of routers and also writes the length of the array to an int*.
- *
- * Revision 1.10  2001/12/14 14:45:13  badbytes
- * Added range checking for CoinWeight.
- *
- * Revision 1.9  2001/12/14 14:08:50  badbytes
- * getrouters() now returns an array of pointers rather than a linked list
- *
- * Revision 1.8  2001/12/14 13:31:20  badbytes
- * *** empty log message ***
- *
- * Revision 1.7  2001/12/14 13:17:12  badbytes
- * Corrected references to types.h
- *
- * Revision 1.6  2001/12/14 13:00:30  badbytes
- * Changed my mind, routers.c and routers.h stay where they are :-)
- *
- * Revision 1.5  2001/12/14 12:56:55  badbytes
- * Moved routers* to common/
- *
- * Revision 1.4  2001/12/14 12:42:50  badbytes
- * References to onion.h and onion.o now point to the common/ directory.
- *
- * Revision 1.3  2001/12/14 12:40:26  badbytes
- * Was being stupid - op doesn't need a private key!! Have removed ...
- *
- * Revision 1.2  2001/12/14 11:27:16  badbytes
- * Configuration and server setup completed.
- *
- * Revision 1.1  2001/12/13 15:15:11  badbytes
- * Started coding the onion proxy.
- *
- */
-
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <sys/time.h>
-#include <sys/resource.h>
-#include <netinet/in.h>
-#include <netdb.h>
-#include <arpa/inet.h>
-#include <errno.h>
-#include <ctype.h>
-#include <stdio.h>
-#include <unistd.h>
-#include <signal.h>
-#include <wait.h>
-
-#include <openssl/err.h>
-#include <openssl/rsa.h>
-#include <openssl/pem.h>
-#include <openssl/evp.h>
-#include <openssl/rand.h>
-
-#include "../common/log.h"
-#include "../common/version.h"
-#include "../common/onion.h"
-#include "../common/utils.h"
-#include "../common/cell.h"
-#include "../common/scheduler.h"
-
-#include "config.h"
-#include "routers.h"
-#include "args.h"
-#include "auth.h"
-#include "op.h"
-#include "ss.h"
-#include "crypto.h"
-#include "buffers.h"
-
-/* global variables */
-
-/* default logging threshold */
-struct timeval conn_tout;
-struct timeval *conn_toutp = &conn_tout; 
-
-/* valid command-line options */
-static char *args = "hf:p:l:";
-
-/* valid config file options */
-static config_opt_t options[] =
-{
-  {"RouterFile", CONFIG_TYPE_STRING, {0}, 0},
-  {"CoinWeight", CONFIG_TYPE_DOUBLE, {0}, 0},
-  {"MaxConn", CONFIG_TYPE_INT, {0}, 0},
-  {"ConnTimeout", CONFIG_TYPE_INT, {0}, 0},
-  {"Bandwidth", CONFIG_TYPE_INT, {0}, 0},
-  {0}
-};
-enum opts {
-  RouterFile=0, CoinWeight, MaxConn, ConnTimeout, Bandwidth
-};
-
-int connections = 0; /* number of active connections */
-
-/* local host info */
-struct hostent *local_host;
-char local_hostname[512];
-  
-struct sockaddr_in local, remote; /* local and remote address info */
-struct sockaddr_in or_addr; /* onion router address */
-
-int request_sock; /* where we listen for connections */
-int new_sock; /* for accepted connections */
-int or_sock; /* for connecting to the first onion router */
-
-/* router array */
-routent_t **routerarray = NULL;
-int rarray_len = 0;
-
-/* end of global variables */
-
-void send_to_router(int s,unsigned char **outbuf, size_t *outbuflen, size_t *outbuf_dataoffset, size_t *outbuf_datalen, struct timeval *lastsend, struct timeval *interval, sched_t *scheduler, EVP_CIPHER_CTX *ctx)
-{
-  int retval;
-  int cells;
-  int datacells;
-  int paddingcells;
-  int i;
-  int x;
-  char *px;
-  struct timeval now;
-  cell_t cipher;
-  cell_t *padding;
-  int cipherlen;
-  unsigned long elapsed;
-  
-  /* calculate the number of cells that need to be sent */
-  retval = gettimeofday(&now,NULL);
-  if (retval == -1)
-  {
-    log(LOG_ERR,"Could not get current time!");
-    return;
-  }
-  
-  elapsed = 1000000*(now.tv_sec-lastsend->tv_sec) + now.tv_usec-lastsend->tv_usec;
-  
-  if (elapsed < 1000000)
-  {
-    cells = ((options[Bandwidth].r.i) * 512) / /* number of bytes per second, divided by two */
-      (1000000/elapsed);  /* fractions of second since last send */
-  }
-  else
-  {
-    cells = ((options[Bandwidth].r.i) * 512) * /* number of bytes per second, divided by two */
-      (elapsed/1000000); /* 1/fractions of second since last send */
-  }
-  cells /= sizeof(cell_t);
-
-  datacells = (*outbuf_datalen)/sizeof(cell_t); /* number of data cells available */
-  if (datacells > cells)
-    datacells = cells;
-  paddingcells = cells - datacells;
-  
-  /* send the data cells first */
-  for (i=0; i<datacells; i++)
-  {
-    /* link-encrypt the cell header */
-    printf("Cell header plaintext: ");
-    for(x=0;x<8;x++) {
-      printf("%u ",*(char *)(*outbuf+*outbuf_dataoffset+x));
-    }
-    printf("\n");
-    retval = EVP_EncryptUpdate(ctx, (unsigned char *)&cipher, &cipherlen, *outbuf+*outbuf_dataoffset, 8);
-    if (!retval)
-    {
-      log(LOG_ERR,"Link encryption failed. Exiting.");
-      exit(-1);
-    }
-    printf("Cell header crypttext: ");
-    px = (char *)&cipher;
-    for(x=0;x<8;x++) {
-      printf("%u ",px[x]);
-    }
-    printf("\n");
-
-    /* copy the payload */
-    memcpy((void *)cipher.payload, (void *)(*outbuf+*outbuf_dataoffset+8), CELL_PAYLOAD_SIZE);
-    
-    /* send the cell */
-    log(LOG_DEBUG,"send_to_router(): Trying to send a data/create cell to router.");
-    retval = write_tout(s,(unsigned char *)&cipher, sizeof(cell_t), conn_toutp);
-    if (retval < sizeof(cell_t))
-    {
-      log(LOG_ERR,"Connection to the router seems to be lost. Exiting.");
-      exit(-1);
-    }
-    *outbuf_dataoffset += sizeof(cell_t);
-    *outbuf_datalen -= sizeof(cell_t);
-    
-  }
-  
-  /* send padding */
-  for (i=0; i<cells-datacells; i++)
-  {
-    padding = new_padding_cell();
-    if (!padding)
-    {
-      log(LOG_ERR,"Memory allocation error. Exiting.");
-      exit(-1);
-    }
-    
-    /* link encrypt the cell header */
-    retval = EVP_EncryptUpdate(ctx, (unsigned char *)&cipher, &cipherlen, (unsigned char *)padding, 8);
-    if (!retval)
-    {
-      log(LOG_ERR,"Link encryption failed. Exiting.");
-      exit(-1);
-    }
-    
-    /* copy the payload */
-    memcpy((void *)cipher.payload, (void *)((unsigned char *)padding+8), CELL_PAYLOAD_SIZE);
-    
-    /* send the cell */
-    log(LOG_DEBUG,"send_to_router(): Trying to send a padding cell to router.");
-    retval = write_tout(s, (unsigned char *)&cipher, sizeof(cell_t), conn_toutp);
-    if (retval < sizeof(cell_t))
-    {
-      log(LOG_ERR,"Connection to the router seems to be lost. Exiting.");
-      exit(-1);
-    }
-    
-    free((void *)padding);
-  }
-  
-  /* update scheduler state, if we've sent anything to the router */
-  if (cells)
-  {
-    retval = update_sched_entry(scheduler, *lastsend, *interval, now, *interval);
-    if (retval == -1)
-    {
-      log(LOG_ERR,"Scheduler error. Exiting.");
-      exit(-1);
-    }
-    memcpy((void *)lastsend,(void *)&now, sizeof(struct timeval));
-  }
-  
-}
-
-/* deal with a client */
-int handle_connection()
-{
-  int retval = 0;
-  int routelen = 0; /* length of the route */
-  unsigned int *route = NULL; /* hops in the route as an array of indexes into rarray */
-  routent_t *firsthop = NULL;
-  
-  uint32_t aci; /* ACI for this connection */
-  
-  unsigned char *onion = NULL; /* holds the onion */
-  int onionlen = 0; /* onion length in host order */
-
-  crypt_path_t **cpath = NULL; /* defines the crypt operations that need to be performed on incoming/outgoing data */
-  char *dest_addr = NULL; /* destination address in ASCII format */
-  
-  int dest_addrlen = 0;
-  char *dest_port = NULL; /* destination port in ASCII format */
-  int dest_portlen = 0;
-  ss_t *ss; /* standard structure */
-  
-  uint32_t router_addr_net; /* address of the first onion router in network order */
-  
-  unsigned char inbuf[1024]; /* buffer for forwarding data between ap and or */
-  
-  unsigned char *outbuf = NULL; /* buffer for cells which are to be transmitted to the first core onion router in the route */
-  size_t outbuflen = 0;
-  size_t outbuf_dataoffset = 0; /* offset to the beginning of the data */
-  size_t outbuf_datalen = 0; /* length of the data stored in the buffer */
-  
-  cell_t cellbuf;
-  int cellbuflen = 0;
-  
-  struct timeval lastsend; /* time of last transmission to the onion router */
-  struct timeval interval; /* transmission interval */
-  
-  /* link encryption */
-  unsigned char f_session_key[8];
-  unsigned char f_session_iv[8] = {0,0,0,0,0,0,0,0};
-  unsigned char b_session_key[8];
-  unsigned char b_session_iv[8] = {0,0,0,0,0,0,0,0};
-  EVP_CIPHER_CTX f_ctx;
-  EVP_CIPHER_CTX b_ctx;
-  
-  /* scheduler */
-  sched_t *scheduler;
-  
-  /* for use with select() */
-  fd_set rmask, mask;
-  int maxfd;
-  struct timeval *timeout;
-  
-  /* get the standard structure */
-  retval = process_ss(new_sock, conn_toutp, &ss,&dest_addr, &dest_addrlen, &dest_port, &dest_portlen);
-  if (retval == -1)
-  {
-    log(LOG_ERR,"Error processing the standard structure.");
-    return -1;
-  }
-  log(LOG_DEBUG,"handle_connection() : Destination = %s:%s",dest_addr,dest_port);
-  
-  /* choose a route */
-  route = (unsigned int *)new_route(options[CoinWeight].r.d, routerarray,rarray_len, &routelen);
-  if (!route)
-  {
-    log(LOG_ERR,"Error choosing a route through the OR network.");
-    return -1;
-  }
-  log(LOG_DEBUG,"handle_connection() : Chosen a route of length %u : ",routelen);
-  for (retval=routelen-1;retval>=0;retval--)
-  {
-    log(LOG_DEBUG,"handle_connection() : %u : %s:%u, %u",routelen-retval,(routerarray[route[retval]])->address,ntohs((routerarray[route[retval]])->port),RSA_size((routerarray[route[retval]])->pkey));
-  }
-  
-  /* allocate memory for the crypt path */
-  cpath = malloc(routelen * sizeof(crypt_path_t *));
-  if (!cpath)
-  {
-    log(LOG_ERR,"Error allocating memory.");
-    free(route);
-    return -1;
-  }
-  /* create an onion and calculate crypto keys */
-  onion = create_onion(routerarray,rarray_len,route,routelen,&onionlen,cpath);
-  if (!onion)
-  {
-    log(LOG_ERR,"Error creating an onion.");
-    free(route);
-    return -1;
-  }
-  log(LOG_DEBUG,"handle_connection() : Created an onion of size %u bytes.",onionlen);
-  log(LOG_DEBUG,"handle_connection() : Crypt path :");
-  for (retval=0;retval<routelen;retval++)
-  {
-    log(LOG_DEBUG,"handle_connection() : %u/%u",(cpath[retval])->forwf, (cpath[retval])->backf);
-  }
-  
-  /* connect to first onion router */
-  or_sock = socket(PF_INET,SOCK_STREAM,IPPROTO_TCP);
-  if (or_sock < 0)
-  {
-    free(route);
-    free(onion);
-    free(cpath);
-    close(new_sock);
-    log(LOG_ERR,"Error creating socket.");
-    return -1;
-  }
-  log(LOG_DEBUG,"handle_connection() : Socket created.");
-
-  firsthop = routerarray[route[routelen-1]];
-  memset((void *)&or_addr,0,sizeof(or_addr));
-  or_addr.sin_family=AF_INET;
-  or_addr.sin_port=firsthop->entry_port;
-  router_addr_net = firsthop->addr;
-  memcpy(&or_addr.sin_addr,&router_addr_net,sizeof(struct sockaddr_in));
-  log(LOG_DEBUG,"handle_connection() : Trying to connect to %s:%u",inet_ntoa(or_addr.sin_addr), ntohs(or_addr.sin_port));
-  retval = connect(or_sock,(struct sockaddr *)&or_addr, sizeof(or_addr));
-  if (retval == -1)
-  {
-    log(LOG_ERR,"Could not connect to onion router.");
-    free(route);
-    free(onion);
-    free(cpath);
-    close(or_sock);
-    close(new_sock);
-    return -1;
-  }
-  log(LOG_DEBUG,"handle_connection() : Connected to first onion router.");
-
-  /* send session key and bandwidth info */
-  retval = send_auth(or_sock, options[Bandwidth].r.i, firsthop->pkey, f_session_key, b_session_key);
-  if (retval == -1)
-  {
-    close(or_sock);
-    close(new_sock);
-    log(LOG_ERR,"Lost connection to an onion router. Exiting.");
-    return -1;
-  }
-  /* initialize crypto engines */
-  EVP_CIPHER_CTX_init(&f_ctx);
-  EVP_CIPHER_CTX_init(&b_ctx);
-  EVP_EncryptInit(&f_ctx, EVP_des_ofb(), f_session_key, f_session_iv);
-  EVP_DecryptInit(&b_ctx, EVP_des_ofb(), b_session_key, b_session_iv);
-  
-  /* chose an ACI */
-  do
-  {
-    retval = RAND_pseudo_bytes((unsigned char *)&aci, 2);
-    if (retval==-1)
-    {
-      log(LOG_ERR,"Random data generator doesn't seem to work. Exiting.");
-      return -1;
-    }
-  } while(!aci); /* don't allow zero ACIs */
-  log(LOG_DEBUG,"handle_connection() : ACI %u chosen.",aci);
-  
-  /* initialize last time of transmission to now */
-  retval = gettimeofday(&lastsend, NULL);
-  if (retval == -1)
-  {
-    log(LOG_ERR,"Could not get current time.");
-    return -1;
-  }
-  /* calculate the transmission interval */
-  interval.tv_sec = 0;
-  interval.tv_usec = 250000/options[Bandwidth].r.i;
-  /* initialize the scheduler */
-  scheduler = new_sched();
-  if (!scheduler)
-  {
-    log(LOG_ERR,"Could not initialize scheduler.");
-    return -1;
-  }
-  retval = add_sched_entry(scheduler, lastsend, interval);
-  if (retval == -1)
-  {
-    log(LOG_ERR,"Could not initialize scheduler.");
-    return -1;
-  }
-  timeout = NULL;
-  
-  /* write the onion into the output buffer */
-  retval = buffer_create(aci, (unsigned char *)onion, onionlen, &outbuf, &outbuflen, &outbuf_dataoffset, &outbuf_datalen, cpath, routelen);
-  if (retval == -1)
-  {
-    log(LOG_DEBUG,"handle_connection() : Could not buffer the onion.");
-    close(or_sock);
-    return -1;
-  }
-  log(LOG_DEBUG,"handle_connection() : Onion buffered for output.");
-
-  /* send standard structure */
-  log(LOG_DEBUG,"handle_connection() : Calling send_crypt ... routelen=%u, sizeof(SS) = %u",routelen,sizeof(ss_t));
-  retval = buffer_data(aci, (unsigned char *)ss, sizeof(ss_t), &outbuf, &outbuflen, &outbuf_dataoffset, &outbuf_datalen, cpath, routelen);
-  if (retval == -1)
-  {
-    log(LOG_DEBUG,"handle_connection() : Could not buffer the standard structure for output.");
-    close(or_sock);
-    return -1;
-  }
-  log(LOG_DEBUG,"handle_connection() : Buffered the standard structure header.");
-  retval = buffer_data(aci, dest_addr,dest_addrlen, &outbuf, &outbuflen, &outbuf_dataoffset, &outbuf_datalen, cpath, routelen);
-  if (retval == -1)
-  {
-    log(LOG_DEBUG,"handle_connection() : Could not buffer the standard structure (dest. address) for output.");
-    close(or_sock);
-    return -1;
-  }
-  log(LOG_DEBUG,"handle_connection() : Buffered the destination address.");
-  retval = buffer_data(aci, dest_port, dest_portlen, &outbuf, &outbuflen, &outbuf_dataoffset, &outbuf_datalen, cpath, routelen);
-  if (retval == -1)
-  {
-    log(LOG_DEBUG,"handle_connection() : Could not buffer the standard structure (dest. port) for output.");
-    close(or_sock);
-    return -1;
-  }
-  log(LOG_DEBUG,"handle_connection() : Buffered the destination port.");
-
-  
-  /* forward data in both directions, crypt as necessary */
-  /* use select() */
-
-  FD_ZERO(&mask);
-  FD_SET(new_sock, &mask);
-  FD_SET(or_sock, &mask);
-  if (new_sock > or_sock)
-    maxfd = new_sock;
-  else
-    maxfd = or_sock;
-
-  while(1)
-  {
-    rmask = mask;
-    
-    /* delete old timeout */
-    if (timeout)
-      free((void *)timeout);
-    /* get the new one */
-    retval = sched_trigger(scheduler, &timeout);
-    if (retval == -1)
-    {
-      log(LOG_DEBUG,"Scheduler error.");
-      break;
-    }
-    retval = select(maxfd+1,&rmask,NULL,NULL,timeout);
-    if (retval < 0)
-    {
-      log(LOG_DEBUG,"handle_connection() : select() returned negative integer");
-      break;
-    }
-    
-    if (FD_ISSET(new_sock,&rmask))
-    {
-      log(LOG_DEBUG,"handle_connection() : FD_ISSET(new_sock)");
-      retval = read_tout(new_sock, inbuf, 1024, 0, conn_toutp);
-      if (retval <= 0)
-      {
-	log(LOG_DEBUG,"handle_connection() : Received EOF on new_sock.");
-	break;
-      }
-      log(LOG_DEBUG,"handle_connection() : Received %u bytes from client.",retval);
-      retval = buffer_data(aci, inbuf, retval, &outbuf, &outbuflen, &outbuf_dataoffset, &outbuf_datalen, cpath, routelen);
-     
-      if (retval < 0)
-      {
-	log(LOG_DEBUG,"handle_connection() : Could not buffer data for output to OR.");
-	break;
-      }
-      log(LOG_DEBUG,"handle_connection() : Buffered %u bytes for output to the OR.",retval);
-    }
-    
-    if (FD_ISSET(or_sock, &rmask))
-    {
-      log(LOG_DEBUG,"handle_connection() : FD_ISSET(or_sock)");
-      /* read the remainder of the cell (or whatever we can get) */
-      retval = read_tout(or_sock, ((unsigned char *)&cellbuf)+cellbuflen, sizeof(cell_t) - cellbuflen, 0, conn_toutp);
-      if (retval <= 0)
-      {
-	log(LOG_DEBUG,"handle_connection() : Received EOF on or_sock.");
-	break;
-      }
-      log(LOG_DEBUG,"handle_connection() : Received %u bytes from router.",retval);
-      cellbuflen += retval;
-      
-      if (cellbuflen == sizeof(cell_t)) /* received an entire cell */
-      {
-	/* link decrypt the cell header */
-	retval = EVP_DecryptUpdate(&b_ctx, (unsigned char *)inbuf, &cellbuflen, (unsigned char *)&cellbuf, 8);
-	if (!retval)
-	{
-	  log(LOG_ERR,"Decryption error. Closing the connection and exiting.");
-	  break;
-	}
-	
-	if (((cell_t *)inbuf)->command == CELL_PADDING) /* padding, discard */
-	{
-	  log(LOG_DEBUG,"Received a PADDING cell. Discarding.");
-	  ; /* discard */
-	}
-	else if (((cell_t *)inbuf)->command == CELL_DATA) /* only process DATA cells , discard otherwise */
-	{
-	  /* decrypt the payload length */
-	  retval = crypt_b((unsigned char *)&((cell_t *)inbuf)->length, 1, cpath, routelen);
-	  if (retval == -1)
-	  {
-	    log(LOG_ERR,"Decryption error. Closing the connection and exiting.");
-	    break;
-	  }
-	  
-	  /* decrypt the payload */
-	  retval = crypt_b((unsigned char *)cellbuf.payload, CELL_PAYLOAD_SIZE, cpath, routelen);
-	  if (retval == -1)
-	  {
-	    log(LOG_ERR,"Decryption error. Closing the connection and exiting.");
-	    break;
-	  }
-	  
-	  /* send the payload to the application proxy */
-	  retval = write_tout(new_sock, (unsigned char *)cellbuf.payload, ((cell_t *)inbuf)->length, conn_toutp);
-	  if (retval < ((cell_t *)inbuf)->length)
-	  {
-	    log(LOG_ERR,"Connection to the application proxy seems to be lost.");
-	    break;
-	  }
-	  log(LOG_DEBUG,"handle_connection() : Sent %u bytes to client.",retval);
-	}
-	else
-	  log(LOG_DEBUG,"handle_connection() : Recived cell has incorrect command or ACI. Discarding.");
-	
-	cellbuflen = 0; /* get ready for the next cell */
-      }
-    }
-
-    /* send cells to the router */
-    send_to_router(or_sock,&outbuf, &outbuflen, &outbuf_dataoffset, &outbuf_datalen, &lastsend, &interval, scheduler, &f_ctx);
-  }
-  
-  /* clean up */
-  log(LOG_DEBUG,"handle_connection() : handle_connection() exiting.");
-  close(or_sock);
-  
-  return 0;
-}
-
-/* used for reaping zombie processes */
-void sigchld_handler(int s)
-{
-  while (wait(NULL) > 0);
-  connections--;
-}
-
-int main(int argc, char *argv[])
-{
-  int one = 1;
-  int retval = 0;
-  
-  char *cp; /* temporary storage */
-  int i=0; /* iteration counter */
-  
-  char *conf_filename = NULL; /* configuration file */
-
-  size_t sin_size; /* for accept() calls */
-  
-  u_short p; /* onion proxy port */
-  
-  /* used for reaping zombie processes */
-  struct sigaction sa;
-
-  int islocal = 0; /* is the incoming connection local? */
-
-  struct rlimit cd_limit; /* resource limit to prevent core dumps */
-
-  log(LOG_ERR,NULL);  /* assign severity level for logger */
-  
-  /* prevent core dump */
-  retval = getrlimit(RLIMIT_CORE, &cd_limit);
-  if (retval == -1)
-  {
-    log(LOG_ERR,"Could not tell the OS to prevent core dumps for the process.");
-    return -1;
-  }
-  cd_limit.rlim_cur = 0;
-  retval = setrlimit(RLIMIT_CORE, &cd_limit);
-  if (retval == -1)
-  {
-    log(LOG_ERR,"Could not tell the OS to prevent core dumps for the process.");
-    return -1;
-  }
-  
-  /* get command-line arguments */
-  retval = getargs(argc,argv,args,&p,&conf_filename,&loglevel);
-  if (retval == -1)
-  {
-    log(LOG_ERR,"Error processing command-line arguments.");
-    exit(1);
-  }
-  
-  /* load config file */
-  retval = getconfig(conf_filename,options);
-  if (retval == -1)
-  {
-    log(LOG_ERR,"Error loading configuration file.");
-    exit(1);
-  }
-  
-  if (options[RouterFile].err != 1)
-  {
-    log(LOG_ERR,"RouterFile option required, but not found.");
-    exit(1);
-  }
-  
-  if (options[CoinWeight].err == -1)
-  {
-    log(LOG_ERR,"Error reading the CoinWeight option.");
-    exit(1);
-  }
-  
-  if (options[CoinWeight].err == 0)
-  {
-    /* this is optional, so if not found, set default value */
-    options[CoinWeight].r.d = OP_DEFAULT_COIN_WEIGHT;
-  }
-  else if ((options[CoinWeight].r.d < 0) || (options[CoinWeight].r.d >= 1))
-  {
-    /* must be a value in [0,1) */
-    log(LOG_ERR,"CoinWeight option must be >= 0 and < 1.");
-    exit(1);
-  }
-  
-  if (options[Bandwidth].err == 0)
-  {
-    /* optional, set to default */
-    options[Bandwidth].r.i = OP_DEFAULT_BANDWIDTH;
-  }
-  else if (options[Bandwidth].r.i <= 0)
-  {
-    log(LOG_ERR,"The Bandwidth option must be an integer greater than zero.");
-    exit(1);
-  }
-  
-  if (options[ConnTimeout].err != 1)
-  {
-    conn_tout.tv_sec = OP_DEFAULT_CONN_TIMEOUT;
-    conn_tout.tv_usec = 0;
-  }
-  else
-  {
-    if (!options[ConnTimeout].r.i)
-      conn_toutp = NULL;
-    else
-      conn_tout.tv_sec = options[ConnTimeout].r.i;
-    conn_tout.tv_usec = 0;
-  }
-  
-  /* load the routers file */
-  routerarray = getrouters(options[RouterFile].r.str,&rarray_len);
-  if (!routerarray)
-  {
-    log(LOG_ERR,"Error loading router list.");
-    exit(1);
-  }
-  
-  /* get local address so that we know where to allow connections from*/
-  retval = gethostname(local_hostname, (size_t)512);
-  if (retval < 0)
-  {
-    log(LOG_ERR,"Error getting local hostname.");
-    return -1;
-  }
-  local_host = gethostbyname(local_hostname);
-  if (!local_host)
-  {
-    log(LOG_ERR,"Error getting local address.");
-    return -1;
-  }
-  log(LOG_DEBUG,"main() : Got local address : %s.",local_hostname);
-  
-  /* get the server up and running */
-  request_sock = socket(PF_INET,SOCK_STREAM,IPPROTO_TCP);
-  if (request_sock < 0)
-  {
-    log(LOG_ERR,"Error opening socket.");
-    return -1;
-  }
-  setsockopt(request_sock, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
-  log(LOG_DEBUG,"main() : Socket opened.");
-  
-  memset((void *)&local,0,sizeof(local)); /* clear the structure first */
-  /* set up the sockaddr_in structure */
-  local.sin_family=AF_INET;
-  local.sin_addr.s_addr = INADDR_ANY;
-  local.sin_port=htons(p);
-  /* bind it to the socket */
-  retval = bind(request_sock,(struct sockaddr *)&local, sizeof(local));
-  if (retval < 0)
-  {
-    log(LOG_ERR,"Error binding socket to local port %d.",p);
-    return retval;
-  }
-  log(LOG_DEBUG,"main() : Socket bound to port %d.",p);
-  /* listen for connections */
-  retval = listen(request_sock,SOMAXCONN);
-  if (retval < 0)
-  {
-    log(LOG_ERR,"Could not listen for connections.");
-    return retval;
-  }
-  log(LOG_DEBUG,"main() : Listening for connections.");
-  /* server should now be up and running */
-
-  /* install the signal handler for making sure zombie processes are killed */
-  sa.sa_handler = sigchld_handler;
-  sigemptyset(&sa.sa_mask);
-  sa.sa_flags = SA_RESTART;
-  retval = sigaction(SIGCHLD,&sa,NULL);
-  if (retval < 0)
-  {
-    log(LOG_ERR,"Could not install a signal handler.");
-    return -1;
-  }
-
-  /* main server loop */
-  /* I use a forking server technique - this isn't the most efficient way to do it,
-   * but it is simpler. */
-  while(1)
-  {
-    sin_size = sizeof(struct sockaddr_in);
-    new_sock = accept(request_sock,(struct sockaddr *)&remote,&sin_size);
-    if (new_sock == -1)
-    {
-      if (errno != EINTR)
-	log(LOG_ERR,"Could not accept socket connection.");
-      else
-	log(LOG_DEBUG,"main() : Interrupt received.");
-      continue;
-    }
-    
-    if (connections == options[MaxConn].r.i)
-    {
-      close(new_sock);
-      log(LOG_NOTICE,"Maximum connection limit exceeded. Rejecting incoming request.");
-    }
-    connections++;
-    log(LOG_DEBUG,"main() : Accepted a connection from %s.",inet_ntoa(remote.sin_addr));
-    
-    /* see if the connection is local, otherwise reject */
-    /* first check that the connection is from the local host, otherwise reject */
-    if (*(uint32_t *)&remote.sin_addr == inet_addr("127.0.0.1"))
-      islocal=1;
-    for (i=0; (local_host->h_addr_list[i] != NULL) && (!islocal); i++)
-    {
-      cp = local_host->h_addr_list[i];
-      if (!memcmp(&remote.sin_addr, cp,sizeof(struct in_addr)))
-	islocal = 1;
-    }
-    
-    if (!islocal)
-    {
-      log(LOG_DEBUG,"main() : Incoming connection is not local. Will reject.");
-      close(new_sock);
-    }
-    else
-    {
-      log(LOG_DEBUG,"main() : Incoming connection seems to be local. Will accept.");
-      /* fork a process to deal with the customer */
-      if (!fork()) /* this is the child process */
-      { 
-	close(request_sock); /* the child doesn't need the request socket anymore */
-	
-	/* Main logic of op. */
-	retval = handle_connection();
-	log(LOG_DEBUG,"main() : Handle connection returned %d.",retval);
-	/* End main logic */
-	
-	exit(retval); /* done, exit */
-      } 
-    
-      close(new_sock); /* don't need this anymore */
-    }
-  }
-
-  return retval;
-
-}
-

src/op/op.h

@@ -1,54 +0,0 @@
-/**
- * op.h
- * Onion Proxy
- *
- * Matej Pfajfar <mp292@cam.ac.uk>
- */
-
-/*
- * Changes :
- * $Log$
- * Revision 1.1  2002/06/26 22:45:50  arma
- * Initial revision
- *
- * Revision 1.7  2002/03/28 11:01:43  badbytes
- * Now does link-encryption and link-padding.
- *
- * Revision 1.6  2002/03/12 23:40:32  mp292
- * Started on op<->router connection padding.
- *
- * Revision 1.5  2002/01/29 02:22:58  mp292
- * Put a timeout on all network I/O.
- *
- * Revision 1.4  2002/01/26 23:01:55  mp292
- * Reviewed according to Secure-Programs-HOWTO.
- *
- * Revision 1.3  2001/12/18 11:52:27  badbytes
- * Coding completed. Proceeding to test.
- *
- * Revision 1.2  2001/12/17 13:36:15  badbytes
- * Writing handle_connection()
- *
- * Revision 1.1  2001/12/13 15:15:11  badbytes
- * Started coding the onion proxy.
- *
- */
-
-#ifndef __OP_H
-
-#define __OP_H
-
-/* choosing the length of a route uses a weighted coin
- * this is the default value for it */
-#define OP_DEFAULT_COIN_WEIGHT 0.8
-
-/* default connection timeout */
-#define OP_DEFAULT_CONN_TIMEOUT 120 /* 120s */
-
-/* default connection bandwidth */
-#define OP_DEFAULT_BANDWIDTH 1 /* 1kb/s */
-
-/* default buffer size per connection */
-#define OP_DEFAULT_BUFSIZE 4096 /* 4kb */
-
-#endif

src/op/routers.c

@@ -1,364 +0,0 @@
-/**
- * routers.c 
- * Routines for loading the list of routers and their public RSA keys.
- *
- * Matej Pfajfar <mp292@cam.ac.uk>
- */
-
-/*
- * Changes :
- * $Log$
- * Revision 1.1  2002/06/26 22:45:50  arma
- * Initial revision
- *
- * Revision 1.16  2002/04/02 14:28:01  badbytes
- * Final finishes.
- *
- * Revision 1.15  2002/03/25 10:48:48  badbytes
- * Added explicit dependency on <netinet/in.h>.
- *
- * Revision 1.14  2002/01/27 19:24:33  mp292
- * Fixed a bug in parameter checking.
- *
- * Revision 1.13  2002/01/26 22:19:15  mp292
- * Reviewed according to Secure-Programs-HOWTO.
- *
- * Revision 1.12  2002/01/18 20:42:25  mp292
- * Slight modification to the way keys are read from the route file.
- *
- * Revision 1.11  2002/01/14 13:05:39  badbytes
- * System testing in progress.
- *
- * Revision 1.10  2002/01/11 15:47:25  badbytes
- * *** empty log message ***
- *
- * Revision 1.9  2001/12/18 15:51:58  badbytes
- * Connection with onion router established. Will continue testing tomorrow.
- *
- * Revision 1.8  2001/12/17 13:36:15  badbytes
- * Writing handle_connection()
- *
- * Revision 1.7  2001/12/17 08:42:45  badbytes
- * getrouters() now returns an array of routers and also writes the length of the array to an int*.
- *
- * Revision 1.6  2001/12/14 14:08:50  badbytes
- * getrouters() now returns an array of pointers rather than a linked list
- *
- * Revision 1.5  2001/12/14 14:05:56  badbytes
- * Added routent_t** make_rarray(routent_t* list);
- *
- * Revision 1.4  2001/12/14 13:25:17  badbytes
- * Moved back from common/
- *
- * Revision 1.2  2001/12/14 11:24:57  badbytes
- * Tested.
- *
- * Revision 1.1  2001/12/13 15:15:11  badbytes
- * Started coding the onion proxy.
- *
- */
-
-#include <openssl/pem.h>
-#include <openssl/err.h>
-#include <netdb.h>
-#include <string.h>
-#include <netinet/in.h>
-
-#include "routers.h"
-#include "../common/log.h"
-#include "../common/utils.h"
-#include "../common/config.h"
-
-/* delete a list of routers from memory */
-void delete_routerlist(routent_t *list)
-{
-  routent_t *tmp = NULL;
-  
-  if (!list)
-    return;
-  
-  do
-  {
-    tmp=list->next;
-    free(list->address);
-    RSA_free(list->pkey);
-    free(list);
-    list = tmp;
-  }
-  while (list != NULL);
-  
-  return;
-}
-
-/* create an NULL-terminated array of pointers pointing to elements of a router list */
-/* this is done in two passes through the list - inefficient but irrelevant as this is
- * only done once when op/or start up */
-routent_t **make_rarray(routent_t* list, size_t *len)
-{
-  routent_t *tmp=NULL;
-  int listlen = 0;
-  routent_t **array=NULL;
-  routent_t **p=NULL;
-  
-  if ((!list) || (!len))
-    return NULL;
-  
-  /* get the length of the list */
-  tmp = list;
-  do
-  {
-    listlen++;
-    tmp = tmp->next;
-  }
-  while (tmp != NULL);
-  
-  array = malloc((listlen+1)*sizeof(routent_t *));
-  if (!array)
-  {
-    log(LOG_ERR,"Error allocating memory.");
-    return NULL;
-  }
-  
-  tmp=list;
-  p = array;
-  do
-  {
-    *p = tmp;
-    p++;
-    tmp = tmp->next;
-  }
-  while(tmp != NULL);
-  *p=NULL;
-  
-  *len = listlen;
-  return array;
-}
-
-/* load the router list */
-routent_t **getrouters(char *routerfile, size_t *lenp)
-{
-  int retval = 0;
-  char *retp = NULL;
-  routent_t *router=NULL, *routerlist=NULL, *lastrouter=NULL;
-  FILE *rf; /* router file */
-  fpos_t fpos;
-  char line[512];
-  char *token;
-  char *errtest; /* detecting errors in strtoul() calls */
-  struct hostent *rent;
-  
-  if ((!routerfile) || (!lenp)) /* invalid parameters */
-    return NULL;
-
-  if (strspn(routerfile,CONFIG_LEGAL_FILENAME_CHARACTERS) != strlen(routerfile)) /* invalid filename */
-  {
-    log(LOG_ERR,"Could not open %s because it contains illegal characters.",routerfile);
-    return NULL;
-  }
-  
-  /* open the router list */
-  rf = fopen(routerfile,"r");
-  if (!rf)
-  {
-    log(LOG_ERR,"Could not open %s.",routerfile);
-    return NULL;
-  }
-  
-  retp= fgets(line,512,rf);
-  while (retp)
-  {
-    log(LOG_DEBUG,"getrouters() : Line :%s",line);
-    token = (char *)strtok(line,OP_ROUTERLIST_SEPCHARS);
-    if (token)
-    {
-      log(LOG_DEBUG,"getrouters() : Token : %s",token);
-      if (token[0] != '#') /* ignore comment lines */
-      {
-	router = malloc(sizeof(routent_t));
-	if (!router)
-	{
-	  log(LOG_ERR,"Could not allocate memory.");
-	  fclose(rf);
-	  delete_routerlist(routerlist);
-	  return NULL;
-	}
-	
-	/* read the address */
-	router->address = malloc(strlen(token)+1);
-	if (!router->address)
-	{
-	  log(LOG_ERR,"Could not allocate memory.");
-	  fclose(rf);
-	  free(router);
-	  delete_routerlist(routerlist);
-	  return NULL;
-	}
-	strcpy(router->address,token);
-	
-	rent = (struct hostent *)gethostbyname(router->address);
-	if (!rent)
-	{
-	  log(LOG_ERR,"Could not get address for router %s.",router->address);
-	  fclose(rf);
-	  free(router->address);
-	  free(router);
-	  delete_routerlist(routerlist);
-	  return NULL;
-	}
-
-	memcpy(&router->addr, rent->h_addr,rent->h_length);
-	
-	/* read the network port */
-	token = (char *)strtok(NULL,OP_ROUTERLIST_SEPCHARS);
-	if (token) /* network port */
-	{
-	  log(LOG_DEBUG,"getrouters() : Token :%s",token);
-	  router->port = (uint16_t)strtoul(token,&errtest,0);
-	  if ((*token != '\0') && (*errtest == '\0')) /* network port conversion was successful */
-	  {
-	    router->port = htons(router->port);
-	    /* read the entry port */
-	    token = (char *)strtok(NULL,OP_ROUTERLIST_SEPCHARS);
-	    if (token) /* entry port */
-	    {
-	      log(LOG_DEBUG,"getrouters() : Token :%s",token);
-	      router->entry_port = (uint16_t)strtoul(token,&errtest,0);
-	      if ((*token != '\0') && (*errtest == '\0')) /* entry port number conversion was successful */
-	      {
-		router->entry_port = htons(router->entry_port);
-		/* check that there is a public key entry for that router */
-		retval = fgetpos(rf, &fpos); /* save the current file position
-					      * we wil return to it later if we find a public key */
-		if (retval == -1)
-		{
-		  log(LOG_ERR,"Could not save position in %s.",routerfile);
-		  free(router->address);
-		  free(router);
-		  fclose(rf);
-		  delete_routerlist(routerlist);
-		  return NULL;
-		}
-		do /* read through to the next non-empty line */
-		{
-		  retp=fgets(line,512,rf);
-		  if (!retp)
-		  {
-		    log(LOG_ERR,"Could not find a public key entry for router %s:%u.",router->address,router->port);
-		    free(router->address);
-		    free(router);
-		    fclose(rf);
-		    delete_routerlist(routerlist);
-		    return NULL;
-		  }
-		  log(LOG_DEBUG,"getrouters() : Line:%s",line);
-		  if ((*line != '#') && (strspn(line,OP_ROUTERLIST_SEPCHARS) != strlen(line) ))
-		  {
-		    break;
-		  }
-		} while (1);
-	    
-		if (!strcmp(line,OP_PUBLICKEY_BEGIN_TAG)) /* we've got the public key */
-		{
-		  retval = fsetpos(rf,&fpos); /* get us back to where we were otherwise crypto lib won't find the key */
-		  if (retval == -1)
-		  {
-		    log(LOG_ERR,"Could not set position in %s.",routerfile);
-		    free(router->address);
-		    free(router);
-		    fclose(rf);
-		    delete_routerlist(routerlist);
-		    return NULL;
-		  }
-		}
-		else /* we found something else; this isn't right */
-		{
-		  log(LOG_ERR,"Could not find a public key entry for router %s:%u.",router->address,router->port);
-		  free(router->address);
-		  free(router);
-		  fclose(rf);
-		  delete_routerlist(routerlist);
-		  return NULL;
-		}
-		
-		log(LOG_DEBUG,"getrouters() : Reading the key ...");
-		/* read the public key into router->pkey */
-		router->pkey=NULL;
-		router->pkey = PEM_read_RSAPublicKey(rf,NULL,NULL,NULL);
-		if (!router->pkey) /* something went wrong */
-		{
-		  log(LOG_ERR,"Could not read public key for router %s:%u.",router->address,router->port);
-		  free(router->address);
-		  free(router);
-		  fclose(rf);
-		  delete_routerlist(routerlist);
-		  return NULL;
-		}
-		else /* read the key */
-		{
-		  log(LOG_DEBUG,"getrouters() : Public key size = %u.", RSA_size(router->pkey));
-		  if (RSA_size(router->pkey) != 128) /* keys MUST be 1024 bits in size */
-		  {
-		    log(LOG_ERR,"Key for router %s:%u is not 1024 bits. All keys must be exactly 1024 bits long.",router->address,router->port);
-		    free(router->address);
-		    RSA_free(router->pkey);
-		    free(router);
-		    fclose(rf);
-		    delete_routerlist(routerlist);
-		    return NULL;
-		  }
-		  router->next = NULL;
-		  /* save the entry into the routerlist linked list */
-		  if (!routerlist) /* this is the first entry */
-		    routerlist = router;
-		  else
-		    lastrouter->next = (void *)router;
-		  lastrouter = router;
-		}
-	      }
-	      else
-	      {
-		log(LOG_ERR,"Entry for router %s doesn't seem to contain a valid entry funnel port.",router->address);
-		free(router->address);
-		free(router);
-		fclose(rf);
-		delete_routerlist(routerlist);
-		return NULL;
-	      }
-	    }
-	    else
-	    {
-	      log(LOG_ERR,"Entry for router %s doesn't seem to contain an entry funnel port.",router->address);
-	      free(router->address);
-	      free(router);
-	      fclose(rf);
-	      delete_routerlist(routerlist);
-	      return NULL;
-	    }
-	  }
-	  else
-	  {
-	    log(LOG_ERR,"Entry for router %s doesn't seem to contain a valid network funnel port.",router->address);
-	    free(router->address);
-	    free(router);
-	    fclose(rf);
-	    delete_routerlist(routerlist);
-	    return NULL;
-	  }
-	}
-	else
-	{
-	  log(LOG_ERR,"Entry for router %s doesn't seem to contain a network funnel port.",router->address);
-	  free(router->address);
-	  free(router);
-	  fclose(rf);
-	  delete_routerlist(routerlist);
-	  return NULL;
-	}
-      }
-    }
-    retp=fgets(line,512,rf);
-  }
-  
-  fclose(rf);
-  return make_rarray(routerlist, lenp);
-}

src/op/routers.h

@@ -1,66 +0,0 @@
-/**
- * routers.h
- * Routines for loading the list of routers and their public RSA keys.
- *
- * Matej Pfajfar <mp292@cam.ac.uk>
- */
-
-/*
- * Changes :
- * $Log$
- * Revision 1.1  2002/06/26 22:45:50  arma
- * Initial revision
- *
- * Revision 1.11  2002/04/02 14:28:01  badbytes
- * Final finishes.
- *
- * Revision 1.10  2002/01/26 22:22:09  mp292
- * Prevented duplicate definitions.
- *
- * Revision 1.9  2002/01/26 22:19:15  mp292
- * Reviewed according to Secure-Programs-HOWTO.
- *
- * Revision 1.8  2001/12/17 08:42:45  badbytes
- * getrouters() now returns an array of routers and also writes the length of the array to an int*.
- *
- * Revision 1.7  2001/12/14 14:08:50  badbytes
- * getrouters() now returns an array of pointers rather than a linked list
- *
- * Revision 1.6  2001/12/14 14:05:56  badbytes
- * Added routent** make_rarray(routent_t* list);
- *
- * Revision 1.5  2001/12/14 13:32:18  badbytes
- * No longer contains the definition of routent_t. This is now in common/routent_t.h
- *
- * Revision 1.4  2001/12/14 13:25:17  badbytes
- * Moved back from common/
- *
- * Revision 1.2  2001/12/14 11:24:57  badbytes
- * Tested.
- *
- * Revision 1.1  2001/12/13 15:15:11  badbytes
- * Started coding the onion proxy.
- *
- */
-
-#ifndef __ROUTERS_H
-
-#define __ROUTERS_H
-
-#include <openssl/rsa.h>
-#include "../common/routent.h"
-
-#define OP_ROUTERLIST_SEPCHARS " \t\n"
-
-#define OP_PUBLICKEY_BEGIN_TAG "-----BEGIN RSA PUBLIC KEY-----\n"
-
-/* load the list of routers into memory */
-routent_t **getrouters(char *routerfile, size_t *listlenp);
-
-/* free the router list pointed to by list */
-void delete_routerlist(routent_t *list);
-
-/* create an NULL-terminated array of pointers pointing to elements of a router list */
-routent_t **make_rarray(routent_t* list, size_t *listlenp);
-
-#endif

src/op/ss.c

@@ -1,194 +0,0 @@
-/**
- * ss.c
- * Standard structure processing.
- *
- * Matej Pfajfar <mp292@cam.ac.uk>
- */
-
-/*
- * Changes :
- * $Log$
- * Revision 1.1  2002/06/26 22:45:50  arma
- * Initial revision
- *
- * Revision 1.1  2002/04/02 14:28:01  badbytes
- * Final finishes.
- *
- */
-
-
-#include <malloc.h>
-#include <unistd.h>
-
-#include "../common/log.h"
-#include "../common/version.h"
-#include "../common/utils.h"
-
-#include "ss.h"
-
-/* read the standard structure, check if it's acceptable and send an appropriate error code
- * Returns : 
- *   -1 processing error
- *    0 OK
- *    1 no error, but standard structure rejected
- */
-int process_ss(int s, struct timeval *conn_toutp, ss_t **ssp, char **addrp, int *addrlenp, char **portp, int *portlenp)
-{
-  int retval = 0;
-  int len = 0; /* number of bytes read */
-  ss_t *ss; /* standard structure */
-  char errcode = SS_ERROR_SUCCESS; /* error code which we send back to the client */
-  char inbuf;
-  char *addr = NULL; /* destination address */
-  int addrlen = 0;
-  char *port = NULL; /* destination port */
-  int portlen = 0;
-  char *tmp = NULL; /* temporary storage */
-  
-  if ((!ssp) || (!addrp) || (!addrlenp) || (!portp) || (!portlenp)) /* invalid parameters */
-    return -1;
-  
-  /* allocate memory for SS */
-  ss = malloc(sizeof(ss_t));
-  if (!ss)
-  {
-    log(LOG_ERR,"Error allocating memory.");
-    return -1;
-  }
-  
-  log(LOG_DEBUG,"Allocated memory for ss.");
-  
-  len = 0;
-  while (len < sizeof(ss_t)) /* need to make sure the entire ss is read */
-  {
-    retval = read_tout(s,(char *)ss+len,sizeof(ss_t)-len,0, conn_toutp);
-    if (retval <= 0)
-    {
-      free(ss);
-      log(LOG_ERR,"Could not receive standard structure.");
-      return -1;
-    }
-    len +=retval;
-  }
-  
-  if ((ss->version == 0) || (ss->version != VERSION)) /* unsupported version */
-  {
-    log(LOG_DEBUG,"Unsupported version.");
-    free(ss);
-    errcode = SS_ERROR_VERSION_UNSUPPORTED;
-    write_tout(s,&errcode,1,conn_toutp);
-    return -1;
-  }
-  
-  if (ss->addr_fmt != SS_ADDR_FMT_ASCII_HOST_PORT) /* unrecognized address format */
-  {
-    log(LOG_DEBUG,"Unrecognized address format.");
-    free(ss);
-    errcode = SS_ERROR_ADDR_FMT_UNSUPPORTED;
-    write_tout(s,&errcode,1,conn_toutp);
-    return -1;
-  }
-  
-  /* allocate memory for the destination address - 512 bytes maximum */
-  addrlen=512;
-  addr = malloc(addrlen);
-  if (!addr)
-  {
-    free(ss);
-    log(LOG_ERR,"Error allocating memory.");
-    return -1;
-  }
-  
-  /* now read the destination address */
-  len = 0;
-  do /* need to keep going until the entire string is read in */
-  {
-    if (len == addrlen) /* we've run out of space, abort */
-    {
-      free(ss);
-      free(addr);
-      log(LOG_ERR,"Client tried to send address > 512 characters.");
-      errcode = SS_ERROR_INVALID_ADDRESS;
-      write_tout(s,&errcode,1,conn_toutp);
-      return -1;
-    }
-    retval = read_tout(s,(void *)&inbuf, 1, 0, conn_toutp);
-    if (retval <= 0)
-    {
-      free(ss);
-      free(addr);
-      log(LOG_ERR,"Error receiving destination address.");
-      return -1;
-    }
-    *(addr+len) = inbuf;
-    len++;
-  } while (inbuf != 0);
-
-  
-  /* allocate memory for the destination port - 6 bytes maximum */
-  portlen = 6;
-  port = malloc(portlen);
-  if (!port)
-  {
-    free(ss);
-    log(LOG_ERR,"Error allocating memory.");
-    free(addr);
-    return -1;
-  }
-  /* now read the destination port */
-  len = 0;
-  do /* keep going until the entire string is read in */
-  {
-    if (len == portlen) /* no more space, abort */
-    {
-      free(ss);
-      free(addr);
-      free(port);
-      log(LOG_ERR,"Client tried to send port > 6 characters.");
-      errcode = SS_ERROR_INVALID_PORT;
-      write_tout(s,&errcode,1,conn_toutp);
-      return -1;
-    }
-    retval = read_tout(s,(void *)&inbuf, 1, 0, conn_toutp);
-    if (retval <= 0)
-    {
-      free(ss);
-      free(addr);
-      free(port);
-      log(LOG_ERR,"Error receiving destination port.");
-      return -1;
-    }
-    *(port+len)=inbuf;
-    len++;
-  } while (inbuf != 0);
-
-  /* send a success error code back to the client */
-  errcode = SS_ERROR_SUCCESS;
-  write_tout(s,&errcode,1,conn_toutp);
-  
-  /* done, now save */
-  addrlen = strlen(addr)+1;
-  tmp = addr;
-  addr = realloc(addr,addrlen);
-  /* if realloc() fails, we just ignore it and use the previously allocated memory, although this may be wasteful */
-  if (!addr)
-    addr=tmp; /* restore previous state */
-  else
-    addr[addrlen-1]=0;
-  
-  portlen = strlen(port)+1;
-  tmp=port;
-  port = realloc(port,portlen);
-  if (!port)
-    port=tmp;
-  else
-    port[portlen-1]=0;
-  
-  *ssp = ss;
-  *addrp = addr;
-  *addrlenp = addrlen;
-  *portp = port;
-  *portlenp = portlen;
-  
-  return 0;
-}

src/op/ss.h

@@ -1,22 +0,0 @@
-/**
- * ss.h
- * Standard structure processing.
- *
- * Matej Pfajfar <mp292@cam.ac.uk>
- */
-
-/*
- * Changes :
- * $Log$
- * Revision 1.1  2002/06/26 22:45:50  arma
- * Initial revision
- *
- * Revision 1.1  2002/04/02 14:28:01  badbytes
- * Final finishes.
- *
- */
-
-
-#include "../common/ss.h"
-
-int process_ss(int s, struct timeval *conn_toutp, ss_t **ssp, char **addrp, int *addrlenp, char **portp, int *portlenp);