diff options
Diffstat (limited to 'sys/contrib/ipfilter/netinet/ip_h323_pxy.c')
-rw-r--r-- | sys/contrib/ipfilter/netinet/ip_h323_pxy.c | 294 |
1 files changed, 0 insertions, 294 deletions
diff --git a/sys/contrib/ipfilter/netinet/ip_h323_pxy.c b/sys/contrib/ipfilter/netinet/ip_h323_pxy.c deleted file mode 100644 index 7fc6227..0000000 --- a/sys/contrib/ipfilter/netinet/ip_h323_pxy.c +++ /dev/null @@ -1,294 +0,0 @@ -/* - * Copyright 2001, QNX Software Systems Ltd. All Rights Reserved - * - * This source code has been published by QNX Software Systems Ltd. (QSSL). - * However, any use, reproduction, modification, distribution or transfer of - * this software, or any software which includes or is based upon any of this - * code, is only permitted under the terms of the QNX Open Community License - * version 1.0 (see licensing.qnx.com for details) or as otherwise expressly - * authorized by a written license agreement from QSSL. For more information, - * please email licensing@qnx.com. - * - * For more details, see QNX_OCL.txt provided with this distribution. - */ - -/* - * Simple H.323 proxy - * - * by xtang@canada.com - * ported to ipfilter 3.4.20 by Michael Grant mg-ipf@grant.org - */ - -#if __FreeBSD_version >= 220000 && defined(_KERNEL) -# include <sys/fcntl.h> -# include <sys/filio.h> -#else -# ifndef linux -# include <sys/ioctl.h> -# endif -#endif - -#define IPF_H323_PROXY - -int ippr_h323_init __P((void)); -void ippr_h323_fini __P((void)); -int ippr_h323_new __P((fr_info_t *, ap_session_t *, nat_t *)); -void ippr_h323_del __P((ap_session_t *)); -int ippr_h323_out __P((fr_info_t *, ap_session_t *, nat_t *)); -int ippr_h323_in __P((fr_info_t *, ap_session_t *, nat_t *)); - -int ippr_h245_new __P((fr_info_t *, ap_session_t *, nat_t *)); -int ippr_h245_out __P((fr_info_t *, ap_session_t *, nat_t *)); -int ippr_h245_in __P((fr_info_t *, ap_session_t *, nat_t *)); - -static frentry_t h323_fr; - -int h323_proxy_init = 0; - -static int find_port __P((int, caddr_t, int datlen, int *, u_short *)); - - -static int find_port(ipaddr, data, datlen, off, port) -int ipaddr; -caddr_t data; -int datlen, *off; -unsigned short *port; -{ - u_32_t addr, netaddr; - u_char *dp; - int offset; - - if (datlen < 6) - return -1; - - *port = 0; - offset = *off; - dp = (u_char *)data; - netaddr = ntohl(ipaddr); - - for (offset = 0; offset <= datlen - 6; offset++, dp++) { - addr = (dp[0] << 24) | (dp[1] << 16) | (dp[2] << 8) | dp[3]; - if (netaddr == addr) - { - *port = (*(dp + 4) << 8) | *(dp + 5); - break; - } - } - *off = offset; - return (offset > datlen - 6) ? -1 : 0; -} - -/* - * Initialize local structures. - */ -int ippr_h323_init() -{ - bzero((char *)&h323_fr, sizeof(h323_fr)); - h323_fr.fr_ref = 1; - h323_fr.fr_flags = FR_INQUE|FR_PASS|FR_QUICK|FR_KEEPSTATE; - MUTEX_INIT(&h323_fr.fr_lock, "H323 proxy rule lock"); - h323_proxy_init = 1; - - return 0; -} - - -void ippr_h323_fini() -{ - if (h323_proxy_init == 1) { - MUTEX_DESTROY(&h323_fr.fr_lock); - h323_proxy_init = 0; - } -} - - -int ippr_h323_new(fin, aps, nat) -fr_info_t *fin; -ap_session_t *aps; -nat_t *nat; -{ - fin = fin; /* LINT */ - nat = nat; /* LINT */ - - aps->aps_data = NULL; - aps->aps_psiz = 0; - - return 0; -} - - -void ippr_h323_del(aps) -ap_session_t *aps; -{ - int i; - ipnat_t *ipn; - - if (aps->aps_data) { - for (i = 0, ipn = aps->aps_data; - i < (aps->aps_psiz / sizeof(ipnat_t)); - i++, ipn = (ipnat_t *)((char *)ipn + sizeof(*ipn))) - { - /* - * Check the comment in ippr_h323_in() function, - * just above fr_nat_ioctl() call. - * We are lucky here because this function is not - * called with ipf_nat locked. - */ - if (fr_nat_ioctl((caddr_t)ipn, SIOCRMNAT, NAT_SYSSPACE| - NAT_LOCKHELD|FWRITE) == -1) { - /*EMPTY*/; - /* log the error */ - } - } - KFREES(aps->aps_data, aps->aps_psiz); - /* avoid double free */ - aps->aps_data = NULL; - aps->aps_psiz = 0; - } - return; -} - - -int ippr_h323_in(fin, aps, nat) -fr_info_t *fin; -ap_session_t *aps; -nat_t *nat; -{ - int ipaddr, off, datlen; - unsigned short port; - caddr_t data; - tcphdr_t *tcp; - ip_t *ip; - - ip = fin->fin_ip; - tcp = (tcphdr_t *)fin->fin_dp; - ipaddr = ip->ip_src.s_addr; - - data = (caddr_t)tcp + (TCP_OFF(tcp) << 2); - datlen = fin->fin_dlen - (TCP_OFF(tcp) << 2); - if (find_port(ipaddr, data, datlen, &off, &port) == 0) { - ipnat_t *ipn; - char *newarray; - - /* setup a nat rule to set a h245 proxy on tcp-port "port" - * it's like: - * map <if> <inter_ip>/<mask> -> <gate_ip>/<mask> proxy port <port> <port>/tcp - */ - KMALLOCS(newarray, char *, aps->aps_psiz + sizeof(*ipn)); - if (newarray == NULL) { - return -1; - } - ipn = (ipnat_t *)&newarray[aps->aps_psiz]; - bcopy((caddr_t)nat->nat_ptr, (caddr_t)ipn, sizeof(ipnat_t)); - (void) strncpy(ipn->in_plabel, "h245", APR_LABELLEN); - - ipn->in_inip = nat->nat_inip.s_addr; - ipn->in_inmsk = 0xffffffff; - ipn->in_dport = htons(port); - /* - * we got a problem here. we need to call fr_nat_ioctl() to add - * the h245 proxy rule, but since we already hold (READ locked) - * the nat table rwlock (ipf_nat), if we go into fr_nat_ioctl(), - * it will try to WRITE lock it. This will causing dead lock - * on RTP. - * - * The quick & dirty solution here is release the read lock, - * call fr_nat_ioctl() and re-lock it. - * A (maybe better) solution is do a UPGRADE(), and instead - * of calling fr_nat_ioctl(), we add the nat rule ourself. - */ - RWLOCK_EXIT(&ipf_nat); - if (fr_nat_ioctl((caddr_t)ipn, SIOCADNAT, - NAT_SYSSPACE|FWRITE) == -1) { - READ_ENTER(&ipf_nat); - return -1; - } - READ_ENTER(&ipf_nat); - if (aps->aps_data != NULL && aps->aps_psiz > 0) { - bcopy(aps->aps_data, newarray, aps->aps_psiz); - KFREES(aps->aps_data, aps->aps_psiz); - } - aps->aps_data = newarray; - aps->aps_psiz += sizeof(*ipn); - } - return 0; -} - - -int ippr_h245_new(fin, aps, nat) -fr_info_t *fin; -ap_session_t *aps; -nat_t *nat; -{ - fin = fin; /* LINT */ - nat = nat; /* LINT */ - - aps->aps_data = NULL; - aps->aps_psiz = 0; - return 0; -} - - -int ippr_h245_out(fin, aps, nat) -fr_info_t *fin; -ap_session_t *aps; -nat_t *nat; -{ - int ipaddr, off, datlen; - tcphdr_t *tcp; - caddr_t data; - u_short port; - ip_t *ip; - - aps = aps; /* LINT */ - - ip = fin->fin_ip; - tcp = (tcphdr_t *)fin->fin_dp; - ipaddr = nat->nat_inip.s_addr; - data = (caddr_t)tcp + (TCP_OFF(tcp) << 2); - datlen = fin->fin_dlen - (TCP_OFF(tcp) << 2); - if (find_port(ipaddr, data, datlen, &off, &port) == 0) { - fr_info_t fi; - nat_t *nat2; - -/* port = htons(port); */ - nat2 = nat_outlookup(fin->fin_ifp, IPN_UDP, IPPROTO_UDP, - ip->ip_src, ip->ip_dst); - if (nat2 == NULL) { - struct ip newip; - struct udphdr udp; - - bcopy((caddr_t)ip, (caddr_t)&newip, sizeof(newip)); - newip.ip_len = fin->fin_hlen + sizeof(udp); - newip.ip_p = IPPROTO_UDP; - newip.ip_src = nat->nat_inip; - - bzero((char *)&udp, sizeof(udp)); - udp.uh_sport = port; - - bcopy((caddr_t)fin, (caddr_t)&fi, sizeof(fi)); - fi.fin_fi.fi_p = IPPROTO_UDP; - fi.fin_data[0] = port; - fi.fin_data[1] = 0; - fi.fin_dp = (char *)&udp; - - nat2 = nat_new(&fi, nat->nat_ptr, NULL, - NAT_SLAVE|IPN_UDP|SI_W_DPORT, - NAT_OUTBOUND); - if (nat2 != NULL) { - (void) nat_proto(&fi, nat2, IPN_UDP); - nat_update(&fi, nat2, nat2->nat_ptr); - - nat2->nat_ptr->in_hits++; -#ifdef IPFILTER_LOG - nat_log(nat2, (u_int)(nat->nat_ptr->in_redir)); -#endif - bcopy((caddr_t)&ip->ip_src.s_addr, - data + off, 4); - bcopy((caddr_t)&nat2->nat_outport, - data + off + 4, 2); - } - } - } - return 0; -} |