547 lines
15 KiB
C
547 lines
15 KiB
C
/* $Id: upnppinhole.c,v 1.14 2019/05/21 08:39:45 nanard Exp $ */
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/* vim: tabstop=4 shiftwidth=4 noexpandtab
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* MiniUPnP project
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* http://miniupnp.free.fr/ or http://miniupnp.tuxfamily.org/
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* (c) 2006-2019 Thomas Bernard
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* This software is subject to the conditions detailed
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* in the LICENCE file provided within the distribution */
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#include <stdlib.h>
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#include <string.h>
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#include <syslog.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <net/if.h>
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#include <arpa/inet.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <unistd.h>
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#include "macros.h"
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#include "config.h"
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#include "upnpredirect.h"
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#include "upnpglobalvars.h"
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#include "upnpevents.h"
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#include "upnputils.h"
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#include "upnppinhole.h"
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#ifdef __APPLE__
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/* XXX - Apple version of PF API seems to differ from what
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* pf/pfpinhole.c expects so don't use that at least.. */
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#ifdef USE_PF
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#undef USE_PF
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#endif /* USE_PF */
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#endif /* __APPLE__ */
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#if defined(USE_NETFILTER)
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#include "netfilter/iptpinhole.h"
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#endif
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#if defined(USE_PF)
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#include "pf/pfpinhole.h"
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#endif
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#if defined(USE_IPF)
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#endif
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#if defined(USE_IPFW)
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#endif
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#ifdef ENABLE_UPNPPINHOLE
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#if 0
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int
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upnp_check_outbound_pinhole(int proto, int * timeout)
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{
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int s, tmptimeout, tmptime_out;
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switch(proto)
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{
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case IPPROTO_UDP:
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s = retrieve_timeout("udp_timeout", timeout);
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return s;
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break;
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case IPPROTO_UDPLITE:
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s = retrieve_timeout("udp_timeout_stream", timeout);
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return s;
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break;
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case IPPROTO_TCP:
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s = retrieve_timeout("tcp_timeout_established", timeout);
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return s;
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break;
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case 65535:
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s = retrieve_timeout("udp_timeout", timeout);
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s = retrieve_timeout("udp_timeout_stream", &tmptimeout);
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s = retrieve_timeout("tcp_timeout_established", &tmptime_out);
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if(tmptimeout<tmptime_out)
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{
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if(tmptimeout<*timeout)
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*timeout = tmptimeout;
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}
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else
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{
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if(tmptime_out<*timeout)
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*timeout = tmptimeout;
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}
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return s;
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break;
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default:
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return -5;
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break;
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}
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return 0;
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}
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#endif
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int
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upnp_find_inboundpinhole(const char * raddr, unsigned short rport,
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const char * iaddr, unsigned short iport,
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int proto, char * desc, int desc_len, unsigned int * leasetime)
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{
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#if defined(USE_PF) || defined(USE_NETFILTER)
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int uid;
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uid = find_pinhole(NULL, raddr, rport, iaddr, iport, proto,
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desc, desc_len, leasetime);
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return uid;
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#else
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return -42;
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#endif
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}
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/* upnp_add_inboundpinhole()
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* returns: 1 on success
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* -1 Pinhole space exhausted
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* -4 invalid arguments
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* -42 not implemented
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* TODO : return uid on success (positive) or error value (negative)
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*/
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int
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upnp_add_inboundpinhole(const char * raddr,
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unsigned short rport,
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const char * iaddr,
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unsigned short iport,
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int proto,
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char * desc,
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unsigned int leasetime,
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int * uid)
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{
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int r;
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time_t current;
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unsigned int timestamp;
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struct in6_addr address;
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r = inet_pton(AF_INET6, iaddr, &address);
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if(r <= 0) {
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syslog(LOG_ERR, "inet_pton(%d, %s, %p) FAILED",
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AF_INET6, iaddr, &address);
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return -4;
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}
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current = upnp_time();
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timestamp = current + leasetime;
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r = 0;
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*uid = upnp_find_inboundpinhole(raddr, rport, iaddr, iport, proto, NULL, 0, NULL);
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if(*uid >= 0) {
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syslog(LOG_INFO, "Pinhole for inbound traffic from [%s]:%hu to [%s]:%hu with proto %d found uid=%d. Updating it.", raddr, rport, iaddr, iport, proto, *uid);
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r = upnp_update_inboundpinhole(*uid, timestamp);
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return (r >= 0) ? 1 : r;
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}
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#if defined(USE_PF) || defined(USE_NETFILTER)
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*uid = add_pinhole (ext_if_name6, raddr, rport,
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iaddr, iport, proto, desc, timestamp);
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return *uid >= 0 ? 1 : -1;
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#else
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return -42; /* not implemented */
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#endif
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}
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#if 0
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int
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upnp_add_inboundpinhole_internal(const char * raddr, unsigned short rport,
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const char * iaddr, unsigned short iport,
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const char * proto, int * uid)
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{
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int c = 9999;
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char cmd[256], cmd_raw[256], cuid[42];
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#if 0
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static const char cmdval_full_udptcp[] = "ip6tables -I %s %d -p %s -i %s -s %s --sport %hu -d %s --dport %hu -j ACCEPT";
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static const char cmdval_udptcp[] = "ip6tables -I %s %d -p %s -i %s --sport %hu -d %s --dport %hu -j ACCEPT";
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static const char cmdval_full_udplite[] = "ip6tables -I %s %d -p %s -i %s -s %s -d %s -j ACCEPT";
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static const char cmdval_udplite[] = "ip6tables -I %s %d -p %s -i %s -d %s -j ACCEPT";
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// raw table command
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static const char cmdval_full_udptcp_raw[] = "ip6tables -t raw -I PREROUTING %d -p %s -i %s -s %s --sport %hu -d %s --dport %hu -j TRACE";
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static const char cmdval_udptcp_raw[] = "ip6tables -t raw -I PREROUTING %d -p %s -i %s --sport %hu -d %s --dport %hu -j TRACE";
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static const char cmdval_full_udplite_raw[] = "ip6tables -t raw -I PREROUTING %d -p %s -i %s -s %s -d %s -j TRACE";
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static const char cmdval_udplite_raw[] = "ip6tables -t raw -I PREROUTING %d -p %s -i %s -d %s -j TRACE";
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#endif
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/*printf("%s\n", raddr);*/
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if(raddr!=NULL)
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{
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#ifdef IPPROTO_UDPLITE
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if(atoi(proto) == IPPROTO_UDPLITE)
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{
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/* snprintf(cmd, sizeof(cmd), cmdval_full_udplite, miniupnpd_forward_chain, line_number, proto, ext_if_name, raddr, iaddr);
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snprintf(cmd_raw, sizeof(cmd_raw), cmdval_full_udplite_raw, line_number, proto, ext_if_name, raddr, iaddr);*/
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}
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else
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#endif
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{
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/* snprintf(cmd, sizeof(cmd), cmdval_full_udptcp, miniupnpd_forward_chain, line_number, proto, ext_if_name, raddr, rport, iaddr, iport);
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snprintf(cmd_raw, sizeof(cmd_raw), cmdval_full_udptcp_raw, line_number, proto, ext_if_name, raddr, rport, iaddr, iport);*/
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}
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}
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else
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{
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#ifdef IPPROTO_UDPLITE
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if(atoi(proto) == IPPROTO_UDPLITE)
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{
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/*snprintf(cmd, sizeof(cmd), cmdval_udplite, miniupnpd_forward_chain, line_number, proto, ext_if_name, iaddr);
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snprintf(cmd_raw, sizeof(cmd_raw), cmdval_udplite_raw, line_number, proto, ext_if_name, iaddr);*/
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}
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else
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#endif
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{
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/*snprintf(cmd, sizeof(cmd), cmdval_udptcp, miniupnpd_forward_chain, line_number, proto, ext_if_name, rport, iaddr, iport);
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snprintf(cmd_raw, sizeof(cmd_raw), cmdval_udptcp_raw, line_number, proto, ext_if_name, rport, iaddr, iport);
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*/
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}
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}
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#ifdef DEBUG
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syslog(LOG_INFO, "Adding following ip6tables rule:");
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syslog(LOG_INFO, " -> %s", cmd);
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syslog(LOG_INFO, " -> %s", cmd_raw);
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#endif
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/* TODO Add a better checking error.*/
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if(system(cmd) < 0 || system(cmd_raw) < 0)
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{
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return 0;
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}
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srand(time(NULL));
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snprintf(cuid, sizeof(cuid), "%.4d", rand()%c);
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*uid = atoi(cuid);
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printf("\t_add_ uid: %s\n", cuid);
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return 1;
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}
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#endif
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/* upnp_get_pinhole_info()
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* return values :
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* 0 OK
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* -1 Internal error
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* -2 NOT FOUND (no such entry)
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* ..
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* -42 Not implemented
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*/
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int
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upnp_get_pinhole_info(unsigned short uid,
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char * raddr, int raddrlen,
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unsigned short * rport,
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char * iaddr, int iaddrlen,
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unsigned short * iport,
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int * proto, char * desc, int desclen,
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unsigned int * leasetime,
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unsigned int * packets)
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{
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/* Call Firewall specific code to get IPv6 pinhole infos */
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#if defined(USE_PF) || defined(USE_NETFILTER)
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int r;
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unsigned int timestamp;
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u_int64_t packets_tmp;
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/*u_int64_t bytes_tmp;*/
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r = get_pinhole_info(uid, raddr, raddrlen, rport,
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iaddr, iaddrlen, iport,
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proto, desc, desclen,
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leasetime ? ×tamp : NULL,
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packets ? &packets_tmp : NULL,
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NULL/*&bytes_tmp*/);
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if(r >= 0) {
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if(leasetime) {
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time_t current_time;
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current_time = upnp_time();
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if(timestamp > (unsigned int)current_time)
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*leasetime = timestamp - current_time;
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else
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*leasetime = 0;
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}
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if(packets)
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*packets = (unsigned int)packets_tmp;
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}
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return r;
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#else
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UNUSED(uid);
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UNUSED(raddr); UNUSED(raddrlen); UNUSED(rport);
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UNUSED(iaddr); UNUSED(iaddrlen); UNUSED(iport);
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UNUSED(proto); UNUSED(desc); UNUSED(desclen);
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UNUSED(leasetime); UNUSED(packets);
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return -42; /* not implemented */
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#endif
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}
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int
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upnp_get_pinhole_uid_by_index(int index)
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{
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#if defined (USE_NETFILTER)
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return get_pinhole_uid_by_index(index);
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#else
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UNUSED(index);
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return -42;
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#endif /* defined (USE_NETFILTER) */
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}
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int
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upnp_update_inboundpinhole(unsigned short uid, unsigned int leasetime)
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{
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#if defined(USE_PF) || defined(USE_NETFILTER)
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unsigned int timestamp;
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timestamp = upnp_time() + leasetime;
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return update_pinhole(uid, timestamp);
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#else
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UNUSED(uid); UNUSED(leasetime);
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return -42; /* not implemented */
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#endif
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}
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int
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upnp_delete_inboundpinhole(unsigned short uid)
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{
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#if defined(USE_PF) || defined(USE_NETFILTER)
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return delete_pinhole(uid);
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#else
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UNUSED(uid);
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return -1;
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#endif
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}
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#if 0
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/*
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* Result:
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* 1: Found Result
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* -4: No result
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* -5: Result in another table
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* -6: Result in another chain
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* -7: Result in a chain not a rule
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*/
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int
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upnp_check_pinhole_working(const char * uid,
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char * eaddr,
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char * iaddr,
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unsigned short * eport,
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unsigned short * iport,
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char * protocol,
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int * rulenum_used)
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{
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/* TODO : to be implemented */
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#if 0
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FILE * fd;
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time_t expire = upnp_time();
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char buf[1024], filename[] = "/var/log/kern.log", expire_time[32]="";
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int res = -4, str_len;
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str_len = strftime(expire_time, sizeof(expire_time), "%b %d %H:%M:%S", localtime(&expire));
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fd = fopen(filename, "r");
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if (fd==NULL)
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{
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syslog(LOG_ERR, "Get_rule: could not open file: %s", filename);
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return -1;
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}
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syslog(LOG_INFO, "Get_rule: Starting getting info in file %s for %s\n", filename, uid);
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buf[sizeof(buf)-1] = 0;
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while(fgets(buf, sizeof(buf)-1, fd) != NULL && res != 1)
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{
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//printf("line: %s\n", buf);
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char * r, * t, * c, * p;
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// looking for something like filter:FORWARD:rule: or filter:MINIUPNPD:rule:
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r = strstr(buf, ":rule:");
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p = strstr(buf, ":policy:");
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t = strstr(buf, "TRACE:"); // table pointeur
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t += 7;
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c = t + 7; // chain pointeur
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if(r)
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{
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printf("\t** Found %.*s\n", 24 ,t);
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char * src, * dst, * sport, * dport, * proto, * line;
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char time[15]="", src_addr[40], dst_addr[40], proto_tmp[8];
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int proto_int;
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strncpy(time, buf, sizeof(time));
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/*if(compare_time(time, expire_time)<0)
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{
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printf("\t\tNot corresponding time\n");
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continue;
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}*/
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line = r + 6;
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printf("\trule line = %d\n", atoi(line));
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src = strstr(buf, "SRC=");
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src += 4;
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snprintf(src_addr, sizeof(src_addr), "%.*s", 39, src);
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#if 0
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del_char(src_addr);
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add_char(src_addr);
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#endif
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dst = strstr(buf, "DST=");
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dst += 4;
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snprintf(dst_addr, sizeof(dst_addr), "%.*s", 39, dst);
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#if 0
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del_char(dst_addr);
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add_char(dst_addr);
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#endif
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proto = strstr(buf, "PROTO=");
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proto += 6;
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proto_int = atoi(protocol);
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if(proto_int == IPPROTO_UDP)
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strcpy(proto_tmp, "UDP");
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else if(proto_int == IPPROTO_TCP)
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strcpy(proto_tmp, "TCP");
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#ifdef IPPROTO_UDPLITE
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else if(proto_int == IPPROTO_UDPLITE)
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strcpy(proto_tmp, "UDPLITE");
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#endif
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else
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strcpy(proto_tmp, "UnsupportedProto");
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// printf("\tCompare eaddr: %s // protocol: %s\n\t to addr: %s // protocol: %.*s\n", eaddr, proto_tmp, src_addr, strlen(proto_tmp), proto);
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// printf("\tCompare iaddr: %s // protocol: %s\n\t to addr: %s // protocol: %.*s\n", iaddr, proto_tmp, dst_addr, strlen(proto_tmp), proto);
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// TODO Check time
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// Check that the paquet found in trace correspond to the one we are looking for
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if( /*(strcmp(eaddr, src_addr) == 0) &&*/ (strcmp(iaddr, dst_addr) == 0) && (strncmp(proto_tmp, proto, strlen(proto_tmp))==0))
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{
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sport = strstr(buf, "SPT=");
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sport += 4;
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dport = strstr(buf, "DPT=");
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dport += 4;
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printf("\tCompare eport: %hu\n\t to port: %d\n", *eport, atoi(sport));
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printf("\tCompare iport: %hu\n\t to port: %d\n", *iport, atoi(dport));
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if(/*eport != atoi(sport) &&*/ *iport != atoi(dport))
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{
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printf("\t\tPort not corresponding\n");
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continue;
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}
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printf("\ttable found: %.*s\n", 6, t);
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printf("\tchain found: %.*s\n", 9, c);
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// Check that the table correspond to the filter table
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if(strncmp(t, "filter", 6)==0)
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{
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// Check that the table correspond to the MINIUPNP table
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if(strncmp(c, "MINIUPNPD", 9)==0)
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{
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*rulenum_used = atoi(line);
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res = 1;
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}
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else
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{
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res = -6;
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continue;
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}
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}
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else
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{
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res = -5;
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continue;
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}
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}
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else
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{
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printf("Packet information not corresponding\n");
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continue;
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}
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}
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if(!r && p)
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{
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printf("\t** Policy case\n");
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char * src, * dst, * sport, * dport, * proto, * line;
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char time[15], src_addr[40], dst_addr[40], proto_tmp[8];
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int proto_int;
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strncpy(time, buf, sizeof(time));
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/*if(compare_time(time, expire_time)<0)
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{
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printf("\t\tNot corresponding time\n");
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continue;
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}*/
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line = p + 8;
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printf("\trule line = %d\n", atoi(line));
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src = strstr(buf, "SRC=");
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src += 4;
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snprintf(src_addr, sizeof(src_addr), "%.*s", 39, src);
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#if 0
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del_char(src_addr);
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add_char(src_addr);
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#endif
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dst = strstr(buf, "DST=");
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dst += 4;
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snprintf(dst_addr, sizeof(dst_addr), "%.*s", 39, dst);
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#if 0
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del_char(dst_addr);
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add_char(dst_addr);
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#endif
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proto = strstr(buf, "PROTO=");
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|
proto += 6;
|
|
proto_int = atoi(protocol);
|
|
if(proto_int == IPPROTO_UDP)
|
|
strcpy(proto_tmp, "UDP");
|
|
else if(proto_int == IPPROTO_TCP)
|
|
strcpy(proto_tmp, "TCP");
|
|
#ifdef IPPROTO_UDPLITE
|
|
else if(proto_int == IPPROTO_UDPLITE)
|
|
strcpy(proto_tmp, "UDPLITE");
|
|
#endif
|
|
else
|
|
strcpy(proto_tmp, "UnsupportedProto");
|
|
|
|
// printf("\tCompare eaddr: %s // protocol: %s\n\t to addr: %s // protocol: %.*s\n", eaddr, proto_tmp, src_addr, strlen(proto_tmp), proto);
|
|
// printf("\tCompare iaddr: %s // protocol: %s\n\t to addr: %s // protocol: %.*s\n", iaddr, proto_tmp, dst_addr, strlen(proto_tmp), proto);
|
|
// Check that the paquet found in trace correspond to the one we are looking for
|
|
if( (strcmp(eaddr, src_addr) == 0) && (strcmp(iaddr, dst_addr) == 0) && (strncmp(proto_tmp, proto, 5)==0))
|
|
{
|
|
sport = strstr(buf, "SPT=");
|
|
sport += 4;
|
|
dport = strstr(buf, "DPT=");
|
|
dport += 4;
|
|
printf("\tCompare eport: %hu\n\t to port: %d\n", *eport, atoi(sport));
|
|
printf("\tCompare iport: %hu\n\t to port: %d\n", *iport, atoi(dport));
|
|
if(*eport != atoi(sport) && *iport != atoi(dport))
|
|
{
|
|
printf("\t\tPort not corresponding\n");
|
|
continue;
|
|
}
|
|
else
|
|
{
|
|
printf("Find a corresponding policy trace in the chain: %.*s\n", 10, c);
|
|
res = -7;
|
|
continue;
|
|
}
|
|
}
|
|
else
|
|
continue;
|
|
}
|
|
}
|
|
fclose(fd);
|
|
return res;
|
|
#else
|
|
return -42; /* to be implemented */
|
|
#endif
|
|
}
|
|
#endif
|
|
|
|
int
|
|
upnp_clean_expired_pinholes(unsigned int * next_timestamp)
|
|
{
|
|
#if defined(USE_PF) || defined(USE_NETFILTER)
|
|
return clean_pinhole_list(next_timestamp);
|
|
#else
|
|
UNUSED(next_timestamp);
|
|
|
|
return 0; /* nothing to do */
|
|
#endif
|
|
}
|
|
|
|
#endif /* ENABLE_UPNPPINHOLE */
|