diff options
Diffstat (limited to 'sys/contrib/ipfilter/netinet/ip_raudio_pxy.c')
| -rw-r--r-- | sys/contrib/ipfilter/netinet/ip_raudio_pxy.c | 336 |
1 files changed, 0 insertions, 336 deletions
diff --git a/sys/contrib/ipfilter/netinet/ip_raudio_pxy.c b/sys/contrib/ipfilter/netinet/ip_raudio_pxy.c deleted file mode 100644 index 76e8b9f..0000000 --- a/sys/contrib/ipfilter/netinet/ip_raudio_pxy.c +++ /dev/null @@ -1,336 +0,0 @@ -/* - * Copyright (C) 1998-2003 by Darren Reed - * - * See the IPFILTER.LICENCE file for details on licencing. - * - * $Id: ip_raudio_pxy.c,v 1.40.2.4 2006/07/14 06:12:17 darrenr Exp $ - */ - -#define IPF_RAUDIO_PROXY - - -int ippr_raudio_init __P((void)); -void ippr_raudio_fini __P((void)); -int ippr_raudio_new __P((fr_info_t *, ap_session_t *, nat_t *)); -int ippr_raudio_in __P((fr_info_t *, ap_session_t *, nat_t *)); -int ippr_raudio_out __P((fr_info_t *, ap_session_t *, nat_t *)); - -static frentry_t raudiofr; - -int raudio_proxy_init = 0; - - -/* - * 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; - MUTEX_INIT(&raudiofr.fr_lock, "Real Audio proxy rule lock"); - raudio_proxy_init = 1; - - return 0; -} - - -void ippr_raudio_fini() -{ - if (raudio_proxy_init == 1) { - MUTEX_DESTROY(&raudiofr.fr_lock); - raudio_proxy_init = 0; - } -} - - -/* - * Setup for a new proxy to handle Real Audio. - */ -int ippr_raudio_new(fin, aps, nat) -fr_info_t *fin; -ap_session_t *aps; -nat_t *nat; -{ - raudio_t *rap; - - KMALLOCS(aps->aps_data, void *, sizeof(raudio_t)); - if (aps->aps_data == NULL) - return -1; - - fin = fin; /* LINT */ - nat = nat; /* LINT */ - - 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, aps, nat) -fr_info_t *fin; -ap_session_t *aps; -nat_t *nat; -{ - raudio_t *rap = aps->aps_data; - unsigned char membuf[512 + 1], *s; - u_short id = 0; - tcphdr_t *tcp; - int off, dlen; - int len = 0; - mb_t *m; - - nat = nat; /* LINT */ - - /* - * If we've already processed the start messages, then nothing left - * for the proxy to do. - */ - if (rap->rap_eos == 1) - return 0; - - m = fin->fin_m; - tcp = (tcphdr_t *)fin->fin_dp; - off = (char *)tcp - (char *)fin->fin_ip; - off += (TCP_OFF(tcp) << 2) + fin->fin_ipoff; - -#ifdef __sgi - dlen = fin->fin_plen - off; -#else - dlen = MSGDSIZE(m) - off; -#endif - if (dlen <= 0) - return 0; - - if (dlen > sizeof(membuf)) - dlen = sizeof(membuf); - - bzero((char *)membuf, sizeof(membuf)); - COPYDATA(m, off, dlen, (char *)membuf); - /* - * 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 = (u_char *)memstr("PNA", (char *)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, aps, nat) -fr_info_t *fin; -ap_session_t *aps; -nat_t *nat; -{ - unsigned char membuf[IPF_MAXPORTLEN + 1], *s; - tcphdr_t *tcp, tcph, *tcp2 = &tcph; - raudio_t *rap = aps->aps_data; - struct in_addr swa, swb; - int off, dlen, slen; - int a1, a2, a3, a4; - u_short sp, dp; - fr_info_t fi; - tcp_seq seq; - nat_t *nat2; - u_char swp; - ip_t *ip; - mb_t *m; - - /* - * 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; - - m = fin->fin_m; - tcp = (tcphdr_t *)fin->fin_dp; - off = (char *)tcp - (char *)fin->fin_ip; - off += (TCP_OFF(tcp) << 2) + fin->fin_ipoff; - -#ifdef __sgi - dlen = fin->fin_plen - off; -#else - dlen = MSGDSIZE(m) - off; -#endif - if (dlen <= 0) - return 0; - - if (dlen > sizeof(membuf)) - dlen = sizeof(membuf); - - bzero((char *)membuf, sizeof(membuf)); - COPYDATA(m, off, dlen, (char *)membuf); - - 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 = (u_char *)memstr("PNA", (char *)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) && (a3 < 19) && (a3 >= 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 = (u_char *)rap->rap_svr + 11; - if (((*s << 8) | *(s + 1)) == RA_ID_ROBUST) { - s += 2; - rap->rap_srport = (*s << 8) | *(s + 1); - } - - ip = fin->fin_ip; - swp = ip->ip_p; - swa = ip->ip_src; - swb = ip->ip_dst; - - ip->ip_p = IPPROTO_UDP; - ip->ip_src = nat->nat_inip; - ip->ip_dst = nat->nat_oip; - - bcopy((char *)fin, (char *)&fi, sizeof(fi)); - bzero((char *)tcp2, sizeof(*tcp2)); - TCP_OFF_A(tcp2, 5); - fi.fin_state = NULL; - fi.fin_nat = NULL; - fi.fin_flx |= FI_IGNORE; - fi.fin_dp = (char *)tcp2; - fi.fin_fr = &raudiofr; - fi.fin_dlen = sizeof(*tcp2); - fi.fin_plen = fi.fin_hlen + sizeof(*tcp2); - tcp2->th_win = htons(8192); - slen = ip->ip_len; - ip->ip_len = fin->fin_hlen + sizeof(*tcp); - - if (((rap->rap_mode & RAP_M_UDP_ROBUST) == RAP_M_UDP_ROBUST) && - (rap->rap_srport != 0)) { - dp = rap->rap_srport; - sp = rap->rap_prport; - tcp2->th_sport = htons(sp); - tcp2->th_dport = htons(dp); - fi.fin_data[0] = dp; - fi.fin_data[1] = sp; - fi.fin_out = 0; - nat2 = nat_new(&fi, nat->nat_ptr, NULL, - NAT_SLAVE|IPN_UDP | (sp ? 0 : SI_W_SPORT), - NAT_OUTBOUND); - if (nat2 != NULL) { - (void) nat_proto(&fi, nat2, IPN_UDP); - nat_update(&fi, nat2, nat2->nat_ptr); - - (void) fr_addstate(&fi, NULL, (sp ? 0 : SI_W_SPORT)); - if (fi.fin_state != NULL) - fr_statederef((ipstate_t **)&fi.fin_state); - } - } - - if ((rap->rap_mode & RAP_M_UDP) == RAP_M_UDP) { - 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; - fi.fin_out = 1; - 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); - - (void) fr_addstate(&fi, NULL, SI_W_DPORT); - if (fi.fin_state != NULL) - fr_statederef((ipstate_t **)&fi.fin_state); - } - } - - ip->ip_p = swp; - ip->ip_len = slen; - ip->ip_src = swa; - ip->ip_dst = swb; - return 0; -} |
