307 lines
6.9 KiB
C
307 lines
6.9 KiB
C
/*-
|
|
* The code in this file was written by Eivind Eklund <perhaps@yes.no>,
|
|
* who places it in the public domain without restriction.
|
|
*
|
|
* $Id: alias_cmd.c,v 1.22 1999/03/25 23:36:23 brian Exp $
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <netinet/in.h>
|
|
#include <arpa/inet.h>
|
|
#include <netdb.h>
|
|
#include <netinet/in_systm.h>
|
|
#include <netinet/in.h>
|
|
#include <netinet/ip.h>
|
|
#include <sys/un.h>
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <termios.h>
|
|
|
|
#ifdef __FreeBSD__
|
|
#include <alias.h>
|
|
#else
|
|
#include "alias.h"
|
|
#endif
|
|
#include "defs.h"
|
|
#include "command.h"
|
|
#include "log.h"
|
|
#include "alias_cmd.h"
|
|
#include "descriptor.h"
|
|
#include "prompt.h"
|
|
#include "timer.h"
|
|
#include "fsm.h"
|
|
#include "slcompress.h"
|
|
#include "throughput.h"
|
|
#include "iplist.h"
|
|
#include "mbuf.h"
|
|
#include "lqr.h"
|
|
#include "hdlc.h"
|
|
#include "ipcp.h"
|
|
#include "lcp.h"
|
|
#include "ccp.h"
|
|
#include "link.h"
|
|
#include "mp.h"
|
|
#include "filter.h"
|
|
#ifndef NORADIUS
|
|
#include "radius.h"
|
|
#endif
|
|
#include "bundle.h"
|
|
|
|
|
|
static int StrToAddr(const char *, struct in_addr *);
|
|
static int StrToPortRange(const char *, u_short *, u_short *, const char *);
|
|
static int StrToAddrAndPort(const char *, struct in_addr *, u_short *,
|
|
u_short *, const char *);
|
|
|
|
|
|
int
|
|
alias_RedirectPort(struct cmdargs const *arg)
|
|
{
|
|
if (!arg->bundle->AliasEnabled) {
|
|
prompt_Printf(arg->prompt, "Alias not enabled\n");
|
|
return 1;
|
|
} else if (arg->argc == arg->argn + 3) {
|
|
char proto_constant;
|
|
const char *proto;
|
|
u_short hlocalport;
|
|
u_short llocalport;
|
|
u_short haliasport;
|
|
u_short laliasport;
|
|
u_short port;
|
|
int error;
|
|
struct in_addr local_addr;
|
|
struct in_addr null_addr;
|
|
struct alias_link *link;
|
|
|
|
proto = arg->argv[arg->argn];
|
|
if (strcmp(proto, "tcp") == 0) {
|
|
proto_constant = IPPROTO_TCP;
|
|
} else if (strcmp(proto, "udp") == 0) {
|
|
proto_constant = IPPROTO_UDP;
|
|
} else {
|
|
prompt_Printf(arg->prompt, "port redirect: protocol must be"
|
|
" tcp or udp\n");
|
|
return -1;
|
|
}
|
|
|
|
error = StrToAddrAndPort(arg->argv[arg->argn+1], &local_addr, &llocalport,
|
|
&hlocalport, proto);
|
|
if (error) {
|
|
prompt_Printf(arg->prompt, "alias port: error reading localaddr:port\n");
|
|
return -1;
|
|
}
|
|
error = StrToPortRange(arg->argv[arg->argn+2], &laliasport, &haliasport,
|
|
proto);
|
|
if (error) {
|
|
prompt_Printf(arg->prompt, "alias port: error reading alias port\n");
|
|
return -1;
|
|
}
|
|
null_addr.s_addr = INADDR_ANY;
|
|
|
|
if (llocalport > hlocalport) {
|
|
port = llocalport;
|
|
llocalport = hlocalport;
|
|
hlocalport = port;
|
|
}
|
|
|
|
if (laliasport > haliasport) {
|
|
port = laliasport;
|
|
laliasport = haliasport;
|
|
haliasport = port;
|
|
}
|
|
|
|
if (haliasport - laliasport != hlocalport - llocalport) {
|
|
prompt_Printf(arg->prompt, "alias port: Port ranges must be equal\n");
|
|
return -1;
|
|
}
|
|
|
|
for (port = laliasport; port <= haliasport; port++) {
|
|
link = PacketAliasRedirectPort(local_addr,
|
|
htons(llocalport + (port - laliasport)),
|
|
null_addr, 0, null_addr, htons(port),
|
|
proto_constant);
|
|
|
|
if (link == NULL) {
|
|
prompt_Printf(arg->prompt, "alias port: %d: error %d\n", port, error);
|
|
return 1;
|
|
}
|
|
}
|
|
} else
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
int
|
|
alias_RedirectAddr(struct cmdargs const *arg)
|
|
{
|
|
if (!arg->bundle->AliasEnabled) {
|
|
prompt_Printf(arg->prompt, "alias not enabled\n");
|
|
return 1;
|
|
} else if (arg->argc == arg->argn+2) {
|
|
int error;
|
|
struct in_addr local_addr;
|
|
struct in_addr alias_addr;
|
|
struct alias_link *link;
|
|
|
|
error = StrToAddr(arg->argv[arg->argn], &local_addr);
|
|
if (error) {
|
|
prompt_Printf(arg->prompt, "address redirect: invalid local address\n");
|
|
return 1;
|
|
}
|
|
error = StrToAddr(arg->argv[arg->argn+1], &alias_addr);
|
|
if (error) {
|
|
prompt_Printf(arg->prompt, "address redirect: invalid alias address\n");
|
|
prompt_Printf(arg->prompt, "Usage: alias %s %s\n", arg->cmd->name,
|
|
arg->cmd->syntax);
|
|
return 1;
|
|
}
|
|
link = PacketAliasRedirectAddr(local_addr, alias_addr);
|
|
if (link == NULL) {
|
|
prompt_Printf(arg->prompt, "address redirect: packet aliasing"
|
|
" engine error\n");
|
|
prompt_Printf(arg->prompt, "Usage: alias %s %s\n", arg->cmd->name,
|
|
arg->cmd->syntax);
|
|
}
|
|
} else
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
StrToAddr(const char *str, struct in_addr *addr)
|
|
{
|
|
struct hostent *hp;
|
|
|
|
if (inet_aton(str, addr))
|
|
return 0;
|
|
|
|
hp = gethostbyname(str);
|
|
if (!hp) {
|
|
log_Printf(LogWARN, "StrToAddr: Unknown host %s.\n", str);
|
|
return -1;
|
|
}
|
|
*addr = *((struct in_addr *) hp->h_addr);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
StrToPort(const char *str, u_short *port, const char *proto)
|
|
{
|
|
struct servent *sp;
|
|
char *end;
|
|
|
|
*port = strtol(str, &end, 10);
|
|
if (*end != '\0') {
|
|
sp = getservbyname(str, proto);
|
|
if (sp == NULL) {
|
|
log_Printf(LogWARN, "StrToAddr: Unknown port or service %s/%s.\n",
|
|
str, proto);
|
|
return -1;
|
|
}
|
|
*port = ntohs(sp->s_port);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
StrToPortRange(const char *str, u_short *low, u_short *high, const char *proto)
|
|
{
|
|
char *minus;
|
|
int res;
|
|
|
|
minus = strchr(str, '-');
|
|
if (minus)
|
|
*minus = '\0'; /* Cheat the const-ness ! */
|
|
|
|
res = StrToPort(str, low, proto);
|
|
|
|
if (minus)
|
|
*minus = '-'; /* Cheat the const-ness ! */
|
|
|
|
if (res == 0) {
|
|
if (minus)
|
|
res = StrToPort(minus + 1, high, proto);
|
|
else
|
|
*high = *low;
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
static int
|
|
StrToAddrAndPort(const char *str, struct in_addr *addr, u_short *low,
|
|
u_short *high, const char *proto)
|
|
{
|
|
char *colon;
|
|
int res;
|
|
|
|
colon = strchr(str, ':');
|
|
if (!colon) {
|
|
log_Printf(LogWARN, "StrToAddrAndPort: %s is missing port number.\n", str);
|
|
return -1;
|
|
}
|
|
|
|
*colon = '\0'; /* Cheat the const-ness ! */
|
|
res = StrToAddr(str, addr);
|
|
*colon = ':'; /* Cheat the const-ness ! */
|
|
if (res != 0)
|
|
return -1;
|
|
|
|
return StrToPortRange(colon + 1, low, high, proto);
|
|
}
|
|
|
|
int
|
|
alias_ProxyRule(struct cmdargs const *arg)
|
|
{
|
|
char cmd[LINE_LEN];
|
|
int f, pos;
|
|
size_t len;
|
|
|
|
if (arg->argn >= arg->argc)
|
|
return -1;
|
|
|
|
for (f = arg->argn, pos = 0; f < arg->argc; f++) {
|
|
len = strlen(arg->argv[f]);
|
|
if (sizeof cmd - pos < len + (f ? 1 : 0))
|
|
break;
|
|
if (f)
|
|
cmd[pos++] = ' ';
|
|
strcpy(cmd + pos, arg->argv[f]);
|
|
pos += len;
|
|
}
|
|
|
|
return PacketAliasProxyRule(cmd);
|
|
}
|
|
|
|
int
|
|
alias_Pptp(struct cmdargs const *arg)
|
|
{
|
|
struct in_addr addr;
|
|
|
|
if (arg->argc == arg->argn) {
|
|
addr.s_addr = INADDR_NONE;
|
|
PacketAliasPptp(addr);
|
|
return 0;
|
|
}
|
|
|
|
if (arg->argc != arg->argn + 1)
|
|
return -1;
|
|
|
|
addr = GetIpAddr(arg->argv[arg->argn]);
|
|
if (addr.s_addr == INADDR_NONE) {
|
|
log_Printf(LogWARN, "%s: invalid address\n", arg->argv[arg->argn]);
|
|
return 1;
|
|
}
|
|
|
|
PacketAliasPptp(addr);
|
|
return 0;
|
|
}
|