/* $Id: upnppinhole.c,v 1.4 2012/05/08 20:41:45 nanard Exp $ */ /* MiniUPnP project * http://miniupnp.free.fr/ or http://miniupnp.tuxfamily.org/ * (c) 2006-2012 Thomas Bernard * This software is subject to the conditions detailed * in the LICENCE file provided within the distribution */ #include <stdlib.h> #include <string.h> #include <syslog.h> #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <net/if.h> #include <arpa/inet.h> #include <stdio.h> #include <ctype.h> #include <unistd.h> #include "macros.h" #include "config.h" #include "upnpredirect.h" #include "upnpglobalvars.h" #include "upnpevents.h" #if defined(USE_NETFILTER) #include "netfilter/iptpinhole.h" #endif #if defined(USE_PF) #include "pf/pfpinhole.h" #endif #if defined(USE_IPF) #endif #if defined(USE_IPFW) #endif #ifdef ENABLE_6FC_SERVICE #if 0 int upnp_check_outbound_pinhole(int proto, int * timeout) { int s, tmptimeout, tmptime_out; switch(proto) { case IPPROTO_UDP: s = retrieve_timeout("udp_timeout", timeout); return s; break; case IPPROTO_UDPLITE: s = retrieve_timeout("udp_timeout_stream", timeout); return s; break; case IPPROTO_TCP: s = retrieve_timeout("tcp_timeout_established", timeout); return s; break; case 65535: s = retrieve_timeout("udp_timeout", timeout); s = retrieve_timeout("udp_timeout_stream", &tmptimeout); s = retrieve_timeout("tcp_timeout_established", &tmptime_out); if(tmptimeout<tmptime_out) { if(tmptimeout<*timeout) *timeout = tmptimeout; } else { if(tmptime_out<*timeout) *timeout = tmptimeout; } return s; break; default: return -5; break; } return 0; } #endif /* upnp_add_inboundpinhole() * returns: 0 on success * -1 failed to add pinhole * -2 already created * -3 inbound pinhole disabled * TODO : return uid on success (positive) or error value (negative) */ int upnp_add_inboundpinhole(const char * raddr, unsigned short rport, const char * iaddr, unsigned short iport, int proto, unsigned int leasetime, int * uid) { int r; time_t current; unsigned int timestamp; struct in6_addr address; if(inet_pton(AF_INET6, iaddr, &address) < 0) { syslog(LOG_ERR, "inet_pton(%s) : %m", iaddr); return 0; } current = time(NULL); timestamp = current + leasetime; r = 0; #if 0 if(r == 1 && strcmp(iaddr, iaddr_old)==0 && iport==iport_old) { syslog(LOG_INFO, "Pinhole for inbound traffic from [%s]:%hu to [%s]:%hu with protocol %s already done. Updating it.", raddr, rport, iaddr_old, iport_old, protocol); t = upnp_update_inboundpinhole(idfound, leaseTime); *uid = atoi(idfound); return t; } else #endif { #if defined(USE_PF) || defined(USE_NETFILTER) *uid = add_pinhole (0/*ext_if_name*/, raddr, rport, iaddr, iport, proto, timestamp); return 1; #else return -42; /* not implemented */ #endif } } #if 0 int upnp_add_inboundpinhole_internal(const char * raddr, unsigned short rport, const char * iaddr, unsigned short iport, const char * proto, int * uid) { int c = 9999; char cmd[256], cmd_raw[256], cuid[42]; #if 0 static const char cmdval_full_udptcp[] = "ip6tables -I %s %d -p %s -i %s -s %s --sport %hu -d %s --dport %hu -j ACCEPT"; static const char cmdval_udptcp[] = "ip6tables -I %s %d -p %s -i %s --sport %hu -d %s --dport %hu -j ACCEPT"; static const char cmdval_full_udplite[] = "ip6tables -I %s %d -p %s -i %s -s %s -d %s -j ACCEPT"; static const char cmdval_udplite[] = "ip6tables -I %s %d -p %s -i %s -d %s -j ACCEPT"; // raw table command 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"; static const char cmdval_udptcp_raw[] = "ip6tables -t raw -I PREROUTING %d -p %s -i %s --sport %hu -d %s --dport %hu -j TRACE"; static const char cmdval_full_udplite_raw[] = "ip6tables -t raw -I PREROUTING %d -p %s -i %s -s %s -d %s -j TRACE"; static const char cmdval_udplite_raw[] = "ip6tables -t raw -I PREROUTING %d -p %s -i %s -d %s -j TRACE"; #endif /*printf("%s\n", raddr);*/ if(raddr!=NULL) { #ifdef IPPROTO_UDPLITE if(atoi(proto) == IPPROTO_UDPLITE) { /* snprintf(cmd, sizeof(cmd), cmdval_full_udplite, miniupnpd_forward_chain, line_number, proto, ext_if_name, raddr, iaddr); snprintf(cmd_raw, sizeof(cmd_raw), cmdval_full_udplite_raw, line_number, proto, ext_if_name, raddr, iaddr);*/ } else #endif { /* snprintf(cmd, sizeof(cmd), cmdval_full_udptcp, miniupnpd_forward_chain, line_number, proto, ext_if_name, raddr, rport, iaddr, iport); snprintf(cmd_raw, sizeof(cmd_raw), cmdval_full_udptcp_raw, line_number, proto, ext_if_name, raddr, rport, iaddr, iport);*/ } } else { #ifdef IPPROTO_UDPLITE if(atoi(proto) == IPPROTO_UDPLITE) { /*snprintf(cmd, sizeof(cmd), cmdval_udplite, miniupnpd_forward_chain, line_number, proto, ext_if_name, iaddr); snprintf(cmd_raw, sizeof(cmd_raw), cmdval_udplite_raw, line_number, proto, ext_if_name, iaddr);*/ } else #endif { /*snprintf(cmd, sizeof(cmd), cmdval_udptcp, miniupnpd_forward_chain, line_number, proto, ext_if_name, rport, iaddr, iport); snprintf(cmd_raw, sizeof(cmd_raw), cmdval_udptcp_raw, line_number, proto, ext_if_name, rport, iaddr, iport); */ } } #ifdef DEBUG syslog(LOG_INFO, "Adding following ip6tables rule:"); syslog(LOG_INFO, " -> %s", cmd); syslog(LOG_INFO, " -> %s", cmd_raw); #endif /* TODO Add a better checking error.*/ if(system(cmd) < 0 || system(cmd_raw) < 0) { return 0; } srand(time(NULL)); snprintf(cuid, sizeof(cuid), "%.4d", rand()%c); *uid = atoi(cuid); printf("\t_add_ uid: %s\n", cuid); return 1; } #endif /* upnp_get_pinhole_info() * return values : * 0 OK * -1 Internal error * -2 NOT FOUND (no such entry) * .. * -42 Not implemented */ int upnp_get_pinhole_info(unsigned short uid, char * raddr, int raddrlen, unsigned short * rport, char * iaddr, int iaddrlen, unsigned short * iport, int * proto, unsigned int * leasetime, unsigned int * packets) { /* Call Firewall specific code to get IPv6 pinhole infos */ #if defined(USE_PF) || defined(USE_NETFILTER) int r; unsigned int timestamp; u_int64_t packets_tmp; /*u_int64_t bytes_tmp;*/ r = get_pinhole_info(uid, raddr, raddrlen, rport, iaddr, iaddrlen, iport, proto, leasetime ? ×tamp : NULL, packets ? &packets_tmp : NULL, NULL/*&bytes_tmp*/); if(r >= 0) { if(leasetime) { time_t current_time; current_time = time(NULL); if(timestamp > (unsigned int)current_time) *leasetime = timestamp - current_time; else *leasetime = 0; } if(packets) *packets = (unsigned int)packets_tmp; } return r; #else UNUSED(uid); UNUSED(raddr); UNUSED(raddrlen); UNUSED(rport); UNUSED(iaddr); UNUSED(iaddrlen); UNUSED(iport); UNUSED(proto); UNUSED(leasetime); UNUSED(packets); return -42; /* not implemented */ #endif } int upnp_update_inboundpinhole(unsigned short uid, unsigned int leasetime) { #if defined(USE_PF) || defined(USE_NETFILTER) unsigned int timestamp; timestamp = time(NULL) + leasetime; return update_pinhole(uid, timestamp); #else UNUSED(uid); UNUSED(leasetime); return -42; /* not implemented */ #endif } int upnp_delete_inboundpinhole(unsigned short uid) { #if defined(USE_PF) || defined(USE_NETFILTER) return delete_pinhole(uid); #else UNUSED(uid); return -1; #endif } #if 0 /* * Result: * 1: Found Result * -4: No result * -5: Result in another table * -6: Result in another chain * -7: Result in a chain not a rule */ int upnp_check_pinhole_working(const char * uid, char * eaddr, char * iaddr, unsigned short * eport, unsigned short * iport, char * protocol, int * rulenum_used) { /* TODO : to be implemented */ #if 0 FILE * fd; time_t expire = time(NULL); char buf[1024], filename[] = "/var/log/kern.log", expire_time[32]=""; int res = -4, str_len; str_len = strftime(expire_time, sizeof(expire_time), "%b %d %H:%M:%S", localtime(&expire)); fd = fopen(filename, "r"); if (fd==NULL) { syslog(LOG_ERR, "Get_rule: could not open file: %s", filename); return -1; } syslog(LOG_INFO, "Get_rule: Starting getting info in file %s for %s\n", filename, uid); buf[sizeof(buf)-1] = 0; while(fgets(buf, sizeof(buf)-1, fd) != NULL && res != 1) { //printf("line: %s\n", buf); char * r, * t, * c, * p; // looking for something like filter:FORWARD:rule: or filter:MINIUPNPD:rule: r = strstr(buf, ":rule:"); p = strstr(buf, ":policy:"); t = strstr(buf, "TRACE:"); // table pointeur t += 7; c = t + 7; // chain pointeur if(r) { printf("\t** Found %.*s\n", 24 ,t); char * src, * dst, * sport, * dport, * proto, * line; char time[15]="", src_addr[40], dst_addr[40], proto_tmp[8]; int proto_int; strncpy(time, buf, sizeof(time)); /*if(compare_time(time, expire_time)<0) { printf("\t\tNot corresponding time\n"); continue; }*/ line = r + 6; printf("\trule line = %d\n", atoi(line)); src = strstr(buf, "SRC="); src += 4; snprintf(src_addr, sizeof(src_addr), "%.*s", 39, src); #if 0 del_char(src_addr); add_char(src_addr); #endif dst = strstr(buf, "DST="); dst += 4; snprintf(dst_addr, sizeof(dst_addr), "%.*s", 39, dst); #if 0 del_char(dst_addr); add_char(dst_addr); #endif proto = strstr(buf, "PROTO="); 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); // TODO Check time // 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, strlen(proto_tmp))==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; } printf("\ttable found: %.*s\n", 6, t); printf("\tchain found: %.*s\n", 9, c); // Check that the table correspond to the filter table if(strncmp(t, "filter", 6)==0) { // Check that the table correspond to the MINIUPNP table if(strncmp(c, "MINIUPNPD", 9)==0) { *rulenum_used = atoi(line); res = 1; } else { res = -6; continue; } } else { res = -5; continue; } } else { printf("Packet information not corresponding\n"); continue; } } if(!r && p) { printf("\t** Policy case\n"); char * src, * dst, * sport, * dport, * proto, * line; char time[15], src_addr[40], dst_addr[40], proto_tmp[8]; int proto_int; strncpy(time, buf, sizeof(time)); /*if(compare_time(time, expire_time)<0) { printf("\t\tNot corresponding time\n"); continue; }*/ line = p + 8; printf("\trule line = %d\n", atoi(line)); src = strstr(buf, "SRC="); src += 4; snprintf(src_addr, sizeof(src_addr), "%.*s", 39, src); #if 0 del_char(src_addr); add_char(src_addr); #endif dst = strstr(buf, "DST="); dst += 4; snprintf(dst_addr, sizeof(dst_addr), "%.*s", 39, dst); #if 0 del_char(dst_addr); add_char(dst_addr); #endif proto = strstr(buf, "PROTO="); 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