307 lines
6.9 KiB
C
307 lines
6.9 KiB
C
/*-
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* The code in this file was written by Eivind Eklund <perhaps@yes.no>,
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* who places it in the public domain without restriction.
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*
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* $Id: alias_cmd.c,v 1.21 1999/03/07 18:13:44 brian Exp $
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*/
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#include <sys/param.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <netinet/in_systm.h>
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#include <netinet/in.h>
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#include <netinet/ip.h>
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#include <sys/un.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <termios.h>
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#ifdef __OpenBSD__
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#include "alias.h"
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#else
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#include <alias.h>
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#endif
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#include "defs.h"
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#include "command.h"
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#include "log.h"
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#include "alias_cmd.h"
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#include "descriptor.h"
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#include "prompt.h"
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#include "timer.h"
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#include "fsm.h"
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#include "slcompress.h"
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#include "throughput.h"
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#include "iplist.h"
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#include "mbuf.h"
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#include "lqr.h"
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#include "hdlc.h"
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#include "ipcp.h"
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#include "lcp.h"
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#include "ccp.h"
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#include "link.h"
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#include "mp.h"
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#include "filter.h"
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#ifndef NORADIUS
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#include "radius.h"
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#endif
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#include "bundle.h"
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static int StrToAddr(const char *, struct in_addr *);
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static int StrToPortRange(const char *, u_short *, u_short *, const char *);
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static int StrToAddrAndPort(const char *, struct in_addr *, u_short *,
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u_short *, const char *);
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int
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alias_RedirectPort(struct cmdargs const *arg)
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{
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if (!arg->bundle->AliasEnabled) {
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prompt_Printf(arg->prompt, "Alias not enabled\n");
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return 1;
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} else if (arg->argc == arg->argn + 3) {
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char proto_constant;
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const char *proto;
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u_short hlocalport;
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u_short llocalport;
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u_short haliasport;
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u_short laliasport;
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u_short port;
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int error;
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struct in_addr local_addr;
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struct in_addr null_addr;
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struct alias_link *link;
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proto = arg->argv[arg->argn];
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if (strcmp(proto, "tcp") == 0) {
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proto_constant = IPPROTO_TCP;
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} else if (strcmp(proto, "udp") == 0) {
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proto_constant = IPPROTO_UDP;
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} else {
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prompt_Printf(arg->prompt, "port redirect: protocol must be"
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" tcp or udp\n");
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return -1;
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}
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error = StrToAddrAndPort(arg->argv[arg->argn+1], &local_addr, &llocalport,
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&hlocalport, proto);
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if (error) {
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prompt_Printf(arg->prompt, "alias port: error reading localaddr:port\n");
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return -1;
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}
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error = StrToPortRange(arg->argv[arg->argn+2], &laliasport, &haliasport,
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proto);
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if (error) {
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prompt_Printf(arg->prompt, "alias port: error reading alias port\n");
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return -1;
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}
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null_addr.s_addr = INADDR_ANY;
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if (llocalport > hlocalport) {
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port = llocalport;
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llocalport = hlocalport;
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hlocalport = port;
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}
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if (laliasport > haliasport) {
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port = laliasport;
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laliasport = haliasport;
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haliasport = port;
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}
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if (haliasport - laliasport != hlocalport - llocalport) {
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prompt_Printf(arg->prompt, "alias port: Port ranges must be equal\n");
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return -1;
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}
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for (port = laliasport; port <= haliasport; port++) {
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link = PacketAliasRedirectPort(local_addr,
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htons(llocalport + (port - laliasport)),
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null_addr, 0, null_addr, htons(port),
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proto_constant);
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if (link == NULL) {
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prompt_Printf(arg->prompt, "alias port: %d: error %d\n", port, error);
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return 1;
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}
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}
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} else
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return -1;
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return 0;
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}
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int
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alias_RedirectAddr(struct cmdargs const *arg)
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{
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if (!arg->bundle->AliasEnabled) {
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prompt_Printf(arg->prompt, "alias not enabled\n");
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return 1;
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} else if (arg->argc == arg->argn+2) {
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int error;
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struct in_addr local_addr;
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struct in_addr alias_addr;
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struct alias_link *link;
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error = StrToAddr(arg->argv[arg->argn], &local_addr);
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if (error) {
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prompt_Printf(arg->prompt, "address redirect: invalid local address\n");
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return 1;
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}
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error = StrToAddr(arg->argv[arg->argn+1], &alias_addr);
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if (error) {
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prompt_Printf(arg->prompt, "address redirect: invalid alias address\n");
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prompt_Printf(arg->prompt, "Usage: alias %s %s\n", arg->cmd->name,
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arg->cmd->syntax);
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return 1;
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}
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link = PacketAliasRedirectAddr(local_addr, alias_addr);
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if (link == NULL) {
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prompt_Printf(arg->prompt, "address redirect: packet aliasing"
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" engine error\n");
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prompt_Printf(arg->prompt, "Usage: alias %s %s\n", arg->cmd->name,
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arg->cmd->syntax);
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}
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} else
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return -1;
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return 0;
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}
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static int
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StrToAddr(const char *str, struct in_addr *addr)
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{
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struct hostent *hp;
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if (inet_aton(str, addr))
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return 0;
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hp = gethostbyname(str);
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if (!hp) {
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log_Printf(LogWARN, "StrToAddr: Unknown host %s.\n", str);
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return -1;
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}
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*addr = *((struct in_addr *) hp->h_addr);
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return 0;
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}
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static int
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StrToPort(const char *str, u_short *port, const char *proto)
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{
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struct servent *sp;
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char *end;
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*port = strtol(str, &end, 10);
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if (*end != '\0') {
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sp = getservbyname(str, proto);
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if (sp == NULL) {
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log_Printf(LogWARN, "StrToAddr: Unknown port or service %s/%s.\n",
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str, proto);
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return -1;
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}
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*port = ntohs(sp->s_port);
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}
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return 0;
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}
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static int
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StrToPortRange(const char *str, u_short *low, u_short *high, const char *proto)
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{
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char *minus;
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int res;
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minus = strchr(str, '-');
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if (minus)
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*minus = '\0'; /* Cheat the const-ness ! */
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res = StrToPort(str, low, proto);
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if (minus)
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*minus = '-'; /* Cheat the const-ness ! */
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if (res == 0) {
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if (minus)
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res = StrToPort(minus + 1, high, proto);
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else
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*high = *low;
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}
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return res;
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}
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static int
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StrToAddrAndPort(const char *str, struct in_addr *addr, u_short *low,
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u_short *high, const char *proto)
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{
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char *colon;
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int res;
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colon = strchr(str, ':');
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if (!colon) {
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log_Printf(LogWARN, "StrToAddrAndPort: %s is missing port number.\n", str);
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return -1;
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}
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*colon = '\0'; /* Cheat the const-ness ! */
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res = StrToAddr(str, addr);
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*colon = ':'; /* Cheat the const-ness ! */
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if (res != 0)
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return -1;
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return StrToPortRange(colon + 1, low, high, proto);
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}
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int
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alias_ProxyRule(struct cmdargs const *arg)
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{
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char cmd[LINE_LEN];
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int f, pos;
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size_t len;
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if (arg->argn >= arg->argc)
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return -1;
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for (f = arg->argn, pos = 0; f < arg->argc; f++) {
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len = strlen(arg->argv[f]);
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if (sizeof cmd - pos < len + (f ? 1 : 0))
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break;
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if (f)
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cmd[pos++] = ' ';
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strcpy(cmd + pos, arg->argv[f]);
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pos += len;
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}
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return PacketAliasProxyRule(cmd);
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}
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int
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alias_Pptp(struct cmdargs const *arg)
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{
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struct in_addr addr;
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if (arg->argc == arg->argn) {
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addr.s_addr = INADDR_NONE;
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PacketAliasPptp(addr);
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return 0;
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}
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if (arg->argc != arg->argn + 1)
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return -1;
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addr = GetIpAddr(arg->argv[arg->argn]);
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if (addr.s_addr == INADDR_NONE) {
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log_Printf(LogWARN, "%s: invalid address\n", arg->argv[arg->argn]);
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return 1;
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}
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PacketAliasPptp(addr);
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return 0;
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}
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