RetroZilla/netwerk/test/TestDNSDaemon.cpp

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2015-10-21 05:03:22 +02:00
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 2000
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <unistd.h>
#include <errno.h>
#if defined(AIX) || defined(__linux)
#include <sys/select.h> // for fd_set
#endif
#if defined(__linux)
// Didn't find gettdtablehi() or gettdtablesize() on linux. Using FD_SETSIZE
#define getdtablehi() FD_SETSIZE
#elif !defined(__irix)
// looks like Irix is the only one that has getdtablehi()?
#define getdtablehi() getdtablesize()
// If you find a system doesn't have getdtablesize try #define getdtablesize
// to FD_SETSIZE. And if you encounter a system that doesn't even have
// FD_SETSIZE, just grab your ankles and use 255.
#endif
#include "nspr.h"
#include "nsCRT.h"
#include "unix_dns.h"
struct sockaddr_un unix_addr;
int async_dns_lookup(char* hostName)
{
fprintf(stderr, "start async_dns_lookup\n");
int socket_fd = socket(PF_UNIX, SOCK_STREAM, 0);
if (socket_fd == -1) {
fprintf(stderr, "socket returned error.\n");
return -1;
}
unix_addr.sun_family = AF_UNIX;
strcpy(unix_addr.sun_path, DNS_SOCK_NAME);
int err = connect(socket_fd,(struct sockaddr*)&unix_addr, sizeof(unix_addr));
if (err == -1) {
fprintf(stderr, "connect failed (errno = %d).\n",errno);
close(socket_fd);
return -1;
}
char buf[256];
strcpy(buf, "lookup: ");
strcpy(&buf[8], hostName);
err = send(socket_fd, buf, strlen(buf)+1, 0);
if (err < 0)
fprintf(stderr, "send(%s) returned error (errno=%d).\n",buf, errno);
// receive 4 byte ID
err = recv(socket_fd, buf, 256, 0);
if (err < 0)
fprintf(stderr, "recv() returned error (errno=%d).\n", errno);
else
{
// printf("recv() returned %d bytes.");
int id = *(int *)buf;
fprintf(stderr, "id: %d\n", id);
}
return socket_fd;
}
static char *
string_trim(char *s)
{
char *s2;
if (!s) return 0;
s2 = s + strlen(s) - 1;
while (s2 > s && (*s2 == '\n' || *s2 == '\r' || *s2 == ' ' || *s2 == '\t'))
*s2-- = 0;
while (*s == ' ' || *s == '\t' || *s == '\n' || *s == '\r')
s++;
return s;
}
hostent *
bytesToHostent(char *buf)
{
int i;
// int size = 0;
int len, aliasCount, addressCount;
int addrtype, addrlength;
char* p = buf;
char s[1024];
len = *(int *)p; // length of name
p += sizeof(int); // advance past name length
memcpy(s, p, len); s[len] = 0;
fprintf(stderr, "hostname: %s\n", s);
p += len; // advance past name
aliasCount = *(int *)p; // number of aliases
p += sizeof(int); // advance past alias count
for (i=0; i<aliasCount; i++) {
len = *(int *)p; // length of alias name
p += sizeof(int); // advance past alias name length
memcpy(s, p, len); s[len] = 0;
fprintf(stderr, "alias: %s\n", s);
p += len; // advance past alias name
}
addrtype = *(int *)p;
fprintf(stderr, "addrtype: %d\n", addrtype);
p += sizeof(int);
addrlength = *(int *)p;
fprintf(stderr, "addrlength: %d\n", addrlength);
p += sizeof(int);
addressCount = *(int *)p;
p += sizeof(int);
for (i=0; i<addressCount; i++) {
len = *(int *)p;
p += sizeof(int);
fprintf(stderr, "addr len: %d\n", len);
fprintf(stderr, "addr : %x\n", *(int *)p);
p += len;
}
// size = p - buf;
// size += 1 + aliasCount;
return 0;
}
int
main(int argc, char* argv[])
{
PRStatus status;
// launch daemon
printf("### launch daemon...\n");
PRProcessAttr *attributes = PR_NewProcessAttr();
if (attributes == nsnull) {
printf("PR_NewProcessAttr() failed.\n");
return -1;
}
PRProcess *daemon = PR_CreateProcess("nsDnsAsyncLookup", nsnull, nsnull, attributes);
if (daemon == nsnull) {
printf("PR_CreateProcess failed.\n");
} else {
// status = PR_DetachProcess(daemon);
//if (status != 0)
// printf("PR_DetachProcess returned %d\n", status);
//daemon = nsnull;
}
PR_DestroyProcessAttr(attributes);
// create socket and connect to daemon
int socket_fd = 0;
PRBool notDone = PR_TRUE;
char buf[1024];
while(notDone) {
int status = 0;
fd_set fdset;
FD_ZERO(&fdset);
FD_SET(fileno(stdin), &fdset);
if (socket_fd > 0)
FD_SET(socket_fd, &fdset);
status = select(getdtablehi(), &fdset, 0, 0, 0);
if (status <= 0)
{
fprintf(stderr, "%s: select() returned %d\n", argv[0], status);
exit(-1);
}
// which fd is set?
if (FD_ISSET(fileno(stdin), &fdset))
{
char *line = fgets(buf, sizeof(buf)-1, stdin);
line = string_trim(line);
if(!strcmp(line, "quit") || !strcmp(line, "exit"))
{
fprintf(stderr, "bye now.\n");
notDone = PR_FALSE;
}
else if (!strncmp(line, "abort ", 6))
{
// abort id
}
else if (strchr(line, ' ') || strchr(line, '\t'))
{
fprintf(stderr, "%s: unrecognized command %s.\n", argv[0], line);
}
else
{
fprintf(stderr, "%s: looking up %s...\n", argv[0], line);
// initiate dns lookup
socket_fd = async_dns_lookup(line);
}
}
if (socket_fd && FD_ISSET(socket_fd, &fdset))
{
// read from socket, parse results
int size = read(socket_fd, buf, 1024);
if (size > 0)
{
// parse buffer into hostent
char *p = buf;
fprintf(stderr, "bytes read: %d\n", size);
fprintf(stderr, "response code: %d\n", *(int *)p);
p += sizeof(int);
for (int i=0; i < size; i++) {
if (!(i%8))
fprintf(stderr, "\n");
fprintf(stderr, "%2.2x ",(unsigned char)buf[i]);
}
fprintf(stderr, "\n");
hostent *h;
h = bytesToHostent(p);
}
close(socket_fd);
socket_fd = 0;
}
}
return 0;
}
/*
buffer
int nameLen;
if (nameLen > 0)
char [nameLen+1] name
int aliasCount
for each alias
int aliasNameLen
char [aliasNameLen+1] aliasName
int h_addrtype
int h_length
int addrCount
for each addr
char[h_length] addr
*/