From d7490544c35fd00d5fa574f813e1a80638a69107 Mon Sep 17 00:00:00 2001 From: Kjell Wooding Date: Tue, 14 Dec 1999 04:17:18 +0000 Subject: New ipfilter files. Preparing for merge of ipfilter 3.3.4. --- sys/netinet/ip_raudio_pxy.c | 294 ++++++++++++++++++++++++++++++++++++++++++++ sys/netinet/ip_rcmd_pxy.c | 157 +++++++++++++++++++++++ sys/netinet/ipl.h | 17 +++ 3 files changed, 468 insertions(+) create mode 100644 sys/netinet/ip_raudio_pxy.c create mode 100644 sys/netinet/ip_rcmd_pxy.c create mode 100644 sys/netinet/ipl.h (limited to 'sys/netinet') diff --git a/sys/netinet/ip_raudio_pxy.c b/sys/netinet/ip_raudio_pxy.c new file mode 100644 index 00000000000..9cbff3fc059 --- /dev/null +++ b/sys/netinet/ip_raudio_pxy.c @@ -0,0 +1,294 @@ +/* $OpenBSD: ip_raudio_pxy.c,v 1.1 1999/12/14 04:17:17 kjell Exp $ */ +#if SOLARIS && defined(_KERNEL) +extern kmutex_t ipf_rw; +#endif + +#define IPF_RAUDIO_PROXY + + +int ippr_raudio_init __P((void)); +int ippr_raudio_new __P((fr_info_t *, ip_t *, ap_session_t *, nat_t *)); +int ippr_raudio_in __P((fr_info_t *, ip_t *, ap_session_t *, nat_t *)); +int ippr_raudio_out __P((fr_info_t *, ip_t *, ap_session_t *, nat_t *)); + +static frentry_t raudiofr; + + +/* + * Real Audio application proxy initialization. + */ +int ippr_raudio_init() +{ + bzero((char *)&raudiofr, sizeof(raudiofr)); + raudiofr.fr_ref = 1; + raudiofr.fr_flags = FR_INQUE|FR_PASS|FR_QUICK|FR_KEEPSTATE; + return 0; +} + + +/* + * Setup for a new proxy to handle Real Audio. + */ +int ippr_raudio_new(fin, ip, aps, nat) +fr_info_t *fin; +ip_t *ip; +ap_session_t *aps; +nat_t *nat; +{ + raudio_t *rap; + + + KMALLOCS(aps->aps_data, void *, sizeof(raudio_t)); + if (aps->aps_data != NULL) { + bzero(aps->aps_data, sizeof(raudio_t)); + rap = aps->aps_data; + aps->aps_psiz = sizeof(raudio_t); + rap->rap_mode = RAP_M_TCP; /* default is for TCP */ + } + return 0; +} + + + +int ippr_raudio_out(fin, ip, aps, nat) +fr_info_t *fin; +ip_t *ip; +ap_session_t *aps; +nat_t *nat; +{ + raudio_t *rap = aps->aps_data; + char membuf[512 + 1], *s; + u_short id = 0; + tcphdr_t *tcp; + int off, dlen; + int len = 0; + mb_t *m; +#if SOLARIS + mb_t *m1; +#endif + + /* + * If we've already processed the start messages, then nothing left + * for the proxy to do. + */ + if (rap->rap_eos == 1) + return 0; + + tcp = (tcphdr_t *)fin->fin_dp; + off = (ip->ip_hl << 2) + (tcp->th_off << 2); + bzero(membuf, sizeof(membuf)); +#if SOLARIS + m = fin->fin_qfm; + + dlen = msgdsize(m) - off; + if (dlen <= 0) + return 0; + copyout_mblk(m, off, MIN(sizeof(membuf), dlen), membuf); +#else + m = *(mb_t **)fin->fin_mp; + + dlen = mbufchainlen(m) - off; + if (dlen <= 0) + return 0; + m_copydata(m, off, MIN(sizeof(membuf), dlen), membuf); +#endif + /* + * In all the startup parsing, ensure that we don't go outside + * the packet buffer boundary. + */ + /* + * Look for the start of connection "PNA" string if not seen yet. + */ + if (rap->rap_seenpna == 0) { + s = memstr("PNA", membuf, 3, dlen); + if (s == NULL) + return 0; + s += 3; + rap->rap_seenpna = 1; + } else + s = membuf; + + /* + * Directly after the PNA will be the version number of this + * connection. + */ + if (rap->rap_seenpna == 1 && rap->rap_seenver == 0) { + if ((s + 1) - membuf < dlen) { + rap->rap_version = (*s << 8) | *(s + 1); + s += 2; + rap->rap_seenver = 1; + } else + return 0; + } + + /* + * Now that we've been past the PNA and version number, we're into the + * startup messages block. This ends when a message with an ID of 0. + */ + while ((rap->rap_eos == 0) && ((s + 1) - membuf < dlen)) { + if (rap->rap_gotid == 0) { + id = (*s << 8) | *(s + 1); + s += 2; + rap->rap_gotid = 1; + if (id == RA_ID_END) { + rap->rap_eos = 1; + break; + } + } else if (rap->rap_gotlen == 0) { + len = (*s << 8) | *(s + 1); + s += 2; + rap->rap_gotlen = 1; + } + + if (rap->rap_gotid == 1 && rap->rap_gotlen == 1) { + if (id == RA_ID_UDP) { + rap->rap_mode &= ~RAP_M_TCP; + rap->rap_mode |= RAP_M_UDP; + rap->rap_plport = (*s << 8) | *(s + 1); + } else if (id == RA_ID_ROBUST) { + rap->rap_mode |= RAP_M_ROBUST; + rap->rap_prport = (*s << 8) | *(s + 1); + } + s += len; + rap->rap_gotlen = 0; + rap->rap_gotid = 0; + } + } + return 0; +} + + +int ippr_raudio_in(fin, ip, aps, nat) +fr_info_t *fin; +ip_t *ip; +ap_session_t *aps; +nat_t *nat; +{ + char membuf[IPF_MAXPORTLEN + 1], *s; + tcphdr_t *tcp, tcph, *tcp2 = &tcph; + raudio_t *rap = aps->aps_data; + struct in_addr swa, swb; + u_int a1, a2, a3, a4; + u_short sp, dp; + int off, dlen; + fr_info_t fi; + tcp_seq seq; + nat_t *ipn; + u_char swp; + mb_t *m; +#if SOLARIS + mb_t *m1; +#endif + + /* + * Wait until we've seen the end of the start messages and even then + * only proceed further if we're using UDP. If they want to use TCP + * then data is sent back on the same channel that is already open. + */ + if (rap->rap_sdone != 0) + return 0; + + tcp = (tcphdr_t *)fin->fin_dp; + off = (ip->ip_hl << 2) + (tcp->th_off << 2); + m = *(mb_t **)fin->fin_mp; + +#if SOLARIS + m = fin->fin_qfm; + + dlen = msgdsize(m) - off; + if (dlen <= 0) + return 0; + bzero(membuf, sizeof(membuf)); + copyout_mblk(m, off, MIN(sizeof(membuf), dlen), membuf); +#else + dlen = mbufchainlen(m) - off; + if (dlen <= 0) + return 0; + bzero(membuf, sizeof(membuf)); + m_copydata(m, off, MIN(sizeof(membuf), dlen), membuf); +#endif + + seq = ntohl(tcp->th_seq); + /* + * Check to see if the data in this packet is of interest to us. + * We only care for the first 19 bytes coming back from the server. + */ + if (rap->rap_sseq == 0) { + s = memstr("PNA", membuf, 3, dlen); + if (s == NULL) + return 0; + a1 = s - membuf; + dlen -= a1; + a1 = 0; + rap->rap_sseq = seq; + a2 = MIN(dlen, sizeof(rap->rap_svr)); + } else if (seq <= rap->rap_sseq + sizeof(rap->rap_svr)) { + /* + * seq # which is the start of data and from that the offset + * into the buffer array. + */ + a1 = seq - rap->rap_sseq; + a2 = MIN(dlen, sizeof(rap->rap_svr)); + a2 -= a1; + s = membuf; + } else + return 0; + + for (a3 = a1, a4 = a2; a4 > 0; a4--, a3++) { + rap->rap_sbf |= (1 << a3); + rap->rap_svr[a3] = *s++; + } + + if ((rap->rap_sbf != 0x7ffff) || (!rap->rap_eos)) /* 19 bits */ + return 0; + rap->rap_sdone = 1; + + s = rap->rap_svr + 13; + rap->rap_srport = (*s << 8) | *(s + 1); + swp = ip->ip_p; + swa = ip->ip_src; + swb = ip->ip_dst; + ip->ip_p = IPPROTO_UDP; + bcopy((char *)fin, (char *)&fi, sizeof(fi)); + bzero((char *)tcp2, sizeof(*tcp2)); + fi.fin_dp = (char *)tcp2; + fi.fin_fr = &raudiofr; + tcp2->th_win = htons(8192); + + if ((rap->rap_mode & RAP_M_UDP_ROBUST) == RAP_M_UDP_ROBUST) { + ip->ip_src = nat->nat_inip; + ip->ip_dst = nat->nat_oip; + sp = rap->rap_srport; + dp = rap->rap_prport; + tcp2->th_sport = htons(dp); + tcp2->th_dport = htons(sp); + fi.fin_data[0] = dp; + fi.fin_data[1] = sp; + ipn = nat_new(nat->nat_ptr, ip, &fi, IPN_UDP, NAT_OUTBOUND); + if (ipn != NULL) { + ipn->nat_age = fr_defnatage; + (void) fr_addstate(ip, &fi, 0); + } + ip->ip_src = swa; + ip->ip_dst = swb; + } + + sp = rap->rap_plport; + + tcp2->th_sport = htons(sp); + tcp2->th_dport = 0; /* XXX - don't specify remote port */ + fi.fin_data[0] = sp; + fi.fin_data[1] = 0; + ip->ip_src = nat->nat_inip; + ip->ip_src = nat->nat_oip; + ipn = nat_new(nat->nat_ptr, ip, &fi, IPN_UDP|FI_W_DPORT, NAT_OUTBOUND); + if (ipn != NULL) { + ipn->nat_age = fr_defnatage; + (void) fr_addstate(ip, &fi, FI_W_DPORT); + } + + ip->ip_p = swp; + ip->ip_src = swa; + ip->ip_dst = swb; + return 0; +} diff --git a/sys/netinet/ip_rcmd_pxy.c b/sys/netinet/ip_rcmd_pxy.c new file mode 100644 index 00000000000..5782e9f3400 --- /dev/null +++ b/sys/netinet/ip_rcmd_pxy.c @@ -0,0 +1,157 @@ +/* $OpenBSD: ip_rcmd_pxy.c,v 1.1 1999/12/14 04:17:17 kjell Exp $ */ +/* + * Simple RCMD transparent proxy for in-kernel use. For use with the NAT + * code. + */ +#if SOLARIS && defined(_KERNEL) +extern kmutex_t ipf_rw; +#endif + +#define isdigit(x) ((x) >= '0' && (x) <= '9') + +#define IPF_RCMD_PROXY + + +int ippr_rcmd_init __P((void)); +int ippr_rcmd_new __P((fr_info_t *, ip_t *, ap_session_t *, nat_t *)); +int ippr_rcmd_out __P((fr_info_t *, ip_t *, ap_session_t *, nat_t *)); +u_short ipf_rcmd_atoi __P((char *)); +int ippr_rcmd_portmsg __P((fr_info_t *, ip_t *, ap_session_t *, nat_t *)); + +static frentry_t rcmdfr; + + +/* + * RCMD application proxy initialization. + */ +int ippr_rcmd_init() +{ + bzero((char *)&rcmdfr, sizeof(rcmdfr)); + rcmdfr.fr_ref = 1; + rcmdfr.fr_flags = FR_INQUE|FR_PASS|FR_QUICK|FR_KEEPSTATE; + return 0; +} + + +/* + * Setup for a new RCMD proxy. + */ +int ippr_rcmd_new(fin, ip, aps, nat) +fr_info_t *fin; +ip_t *ip; +ap_session_t *aps; +nat_t *nat; +{ + tcphdr_t *tcp = (tcphdr_t *)fin->fin_dp; + + aps->aps_psiz = sizeof(u_32_t); + KMALLOCS(aps->aps_data, u_32_t *, sizeof(u_32_t)); + if (aps->aps_data == NULL) + return -1; + *(u_32_t *)aps->aps_data = 0; + aps->aps_sport = tcp->th_sport; + aps->aps_dport = tcp->th_dport; + return 0; +} + + +/* + * ipf_rcmd_atoi - implement a simple version of atoi + */ +u_short ipf_rcmd_atoi(ptr) +char *ptr; +{ + register char *s = ptr, c; + register u_short i = 0; + + while ((c = *s++) && isdigit(c)) { + i *= 10; + i += c - '0'; + } + return i; +} + + +int ippr_rcmd_portmsg(fin, ip, aps, nat) +fr_info_t *fin; +ip_t *ip; +ap_session_t *aps; +nat_t *nat; +{ + char portbuf[8], *s; + struct in_addr swip; + u_short sp, dp; + int off, dlen; + tcphdr_t *tcp, tcph, *tcp2 = &tcph; + fr_info_t fi; + nat_t *ipn; + mb_t *m; +#if SOLARIS + mb_t *m1; +#endif + + tcp = (tcphdr_t *)fin->fin_dp; + off = (ip->ip_hl << 2) + (tcp->th_off << 2); + m = *(mb_t **)fin->fin_mp; + +#if SOLARIS + m = fin->fin_qfm; + + dlen = msgdsize(m) - off; + bzero(portbuf, sizeof(portbuf)); + copyout_mblk(m, off, MIN(sizeof(portbuf), dlen), portbuf); +#else + dlen = mbufchainlen(m) - off; + bzero(portbuf, sizeof(portbuf)); + m_copydata(m, off, MIN(sizeof(portbuf), dlen), portbuf); +#endif + if ((*(u_32_t *)aps->aps_data != 0) && + (tcp->th_seq != *(u_32_t *)aps->aps_data)) + return 0; + + portbuf[sizeof(portbuf) - 1] = '\0'; + s = portbuf; + sp = ipf_rcmd_atoi(s); + if (!sp) + return 0; + + /* + * Add skeleton NAT entry for connection which will come back the + * other way. + */ + sp = htons(sp); + dp = htons(fin->fin_data[1]); + ipn = nat_outlookup(fin->fin_ifp, IPN_TCP, nat->nat_p, nat->nat_inip, + ip->ip_dst, (dp << 16) | sp); + if (ipn == NULL) { + bcopy((char *)fin, (char *)&fi, sizeof(fi)); + bzero((char *)tcp2, sizeof(*tcp2)); + tcp2->th_win = htons(8192); + tcp2->th_sport = sp; + tcp2->th_dport = 0; /* XXX - don't specify remote port */ + fi.fin_data[0] = ntohs(sp); + fi.fin_data[1] = 0; + fi.fin_dp = (char *)tcp2; + swip = ip->ip_src; + ip->ip_src = nat->nat_inip; + ipn = nat_new(nat->nat_ptr, ip, &fi, IPN_TCP|FI_W_DPORT, + NAT_OUTBOUND); + if (ipn != NULL) { + ipn->nat_age = fr_defnatage; + fi.fin_fr = &rcmdfr; + (void) fr_addstate(ip, &fi, FI_W_DPORT); + } + ip->ip_src = swip; + } + return 0; +} + + +int ippr_rcmd_out(fin, ip, aps, nat) +fr_info_t *fin; +ip_t *ip; +ap_session_t *aps; +nat_t *nat; +{ + return ippr_rcmd_portmsg(fin, ip, aps, nat); +} diff --git a/sys/netinet/ipl.h b/sys/netinet/ipl.h new file mode 100644 index 00000000000..9ebb6abc239 --- /dev/null +++ b/sys/netinet/ipl.h @@ -0,0 +1,17 @@ +/* $OpenBSD: ipl.h,v 1.1 1999/12/14 04:17:17 kjell Exp $ */ +/* + * Copyright (C) 1993-1999 by Darren Reed. + * + * Redistribution and use in source and binary forms are permitted + * provided that this notice is preserved and due credit is given + * to the original author and the contributors. + * + * @(#)ipl.h 1.21 6/5/96 + */ + +#ifndef __IPL_H__ +#define __IPL_H__ + +#define IPL_VERSION "IP Filter: v3.3.4" + +#endif -- cgit v1.2.3