tor-browser

rcnetdb.cpp (6026B)

---

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/*
** Base class implementation for network access functions (ref: prnetdb.h)
*/

#include "rclock.h"
#include "rcnetdb.h"

#include <prmem.h>
#include <prlog.h>
#include <string.h>

RCNetAddr::RCNetAddr(const RCNetAddr& his): RCBase()
{
   address = his.address;
}

RCNetAddr::RCNetAddr(const RCNetAddr& his, PRUint16 port): RCBase()
{
   address = his.address;
   switch (address.raw.family)
   {
       case PR_AF_INET: address.inet.port = port; break;
       case PR_AF_INET6: address.ipv6.port = port; break;
       default: break;
   }
}  /* RCNetAddr::RCNetAddr */

RCNetAddr::RCNetAddr(RCNetAddr::HostValue host, PRUint16 port): RCBase()
{
   PRNetAddrValue how;
   switch (host)
   {
       case RCNetAddr::any: how = PR_IpAddrAny; break;
       case RCNetAddr::loopback: how = PR_IpAddrLoopback; break;
       default: PR_NOT_REACHED("This can't happen -- and did!");
   }
   (void)PR_InitializeNetAddr(how, port, &address);
}  /* RCNetAddr::RCNetAddr */

RCNetAddr::~RCNetAddr() { }

void RCNetAddr::operator=(const RCNetAddr& his) {
   address = his.address;
}

PRStatus RCNetAddr::FromString(const char* string)
{
   return PR_StringToNetAddr(string, &address);
}

void RCNetAddr::operator=(const PRNetAddr* addr) {
   address = *addr;
}

PRBool RCNetAddr::operator==(const RCNetAddr& his) const
{
   PRBool rv = EqualHost(his);
   if (rv)
   {
       switch (address.raw.family)
       {
           case PR_AF_INET:
               rv = (address.inet.port == his.address.inet.port); break;
           case PR_AF_INET6:
               rv = (address.ipv6.port == his.address.ipv6.port); break;
           case PR_AF_LOCAL:
           default: break;
       }
   }
   return rv;
}  /* RCNetAddr::operator== */

PRBool RCNetAddr::EqualHost(const RCNetAddr& his) const
{
   PRBool rv;
   switch (address.raw.family)
   {
       case PR_AF_INET:
           rv = (address.inet.ip == his.address.inet.ip); break;
       case PR_AF_INET6:
           rv = (0 == memcmp(
                     &address.ipv6.ip, &his.address.ipv6.ip,
                     sizeof(address.ipv6.ip)));
           break;
#if defined(XP_UNIX)
       case PR_AF_LOCAL:
           rv = (0 == strncmp(
                     address.local.path, his.address.local.path,
                     sizeof(address.local.path)));
           break;
#endif
       default: break;
   }
   return rv;
}  /* RCNetAddr::operator== */

PRStatus RCNetAddr::ToString(char *string, PRSize size) const
{
   return PR_NetAddrToString(&address, string, size);
}

/*
** RCHostLookup
*/

RCHostLookup::~RCHostLookup()
{
   if (NULL != address) {
       delete [] address;
   }
}  /* RCHostLookup::~RCHostLookup */

RCHostLookup::RCHostLookup(): RCBase()
{
   address = NULL;
   max_index = 0;
}  /* RCHostLookup::RCHostLookup */

PRStatus RCHostLookup::ByName(const char* name)
{
   PRStatus rv;
   PRNetAddr addr;
   PRHostEnt hostentry;
   PRIntn index = 0, max;
   RCNetAddr* vector = NULL;
   RCNetAddr* old_vector = NULL;
   void* buffer = PR_Malloc(PR_NETDB_BUF_SIZE);
   if (NULL == buffer) {
       return PR_FAILURE;
   }
   rv = PR_GetHostByName(name, (char*)buffer, PR_NETDB_BUF_SIZE, &hostentry);
   if (PR_SUCCESS == rv)
   {
       for (max = 0, index = 0;; ++max)
       {
           index = PR_EnumerateHostEnt(index, &hostentry, 0, &addr);
           if (0 == index) {
               break;
           }
       }
       if (max > 0)
       {
           vector = new RCNetAddr[max];
           while (--max > 0)
           {
               index = PR_EnumerateHostEnt(index, &hostentry, 0, &addr);
               if (0 == index) {
                   break;
               }
               vector[index] = &addr;
           }
           {
               RCEnter entry(&ml);
               old_vector = address;
               address = vector;
               max_index = max;
           }
           if (NULL != old_vector) {
               delete [] old_vector;
           }
       }
   }
   if (NULL != buffer) {
       PR_DELETE(buffer);
   }
   return PR_SUCCESS;
}  /* RCHostLookup::ByName */

PRStatus RCHostLookup::ByAddress(const RCNetAddr& host_addr)
{
   PRStatus rv;
   PRNetAddr addr;
   PRHostEnt hostentry;
   PRIntn index = 0, max;
   RCNetAddr* vector = NULL;
   RCNetAddr* old_vector = NULL;
   char *buffer = (char*)PR_Malloc(PR_NETDB_BUF_SIZE);
   if (NULL == buffer) {
       return PR_FAILURE;
   }
   rv = PR_GetHostByAddr(host_addr, buffer, PR_NETDB_BUF_SIZE, &hostentry);
   if (PR_SUCCESS == rv)
   {
       for (max = 0, index = 0;; ++max)
       {
           index = PR_EnumerateHostEnt(index, &hostentry, 0, &addr);
           if (0 == index) {
               break;
           }
       }
       if (max > 0)
       {
           vector = new RCNetAddr[max];
           while (--max > 0)
           {
               index = PR_EnumerateHostEnt(index, &hostentry, 0, &addr);
               if (0 == index) {
                   break;
               }
               vector[index] = &addr;
           }
           {
               RCEnter entry(&ml);
               old_vector = address;
               address = vector;
               max_index = max;
           }
           if (NULL != old_vector) {
               delete [] old_vector;
           }
       }
   }
   if (NULL != buffer) {
       PR_DELETE(buffer);
   }
   return PR_SUCCESS;
}  /* RCHostLookup::ByAddress */

const RCNetAddr* RCHostLookup::operator[](PRUintn which)
{
   RCNetAddr* addr = NULL;
   if (which < max_index) {
       addr = &address[which];
   }
   return addr;
}  /* RCHostLookup::operator[] */

/* RCNetdb.cpp */