diff options
Diffstat (limited to 'lib/libalias/alias_cuseeme.c')
| -rw-r--r-- | lib/libalias/alias_cuseeme.c | 123 |
1 files changed, 0 insertions, 123 deletions
diff --git a/lib/libalias/alias_cuseeme.c b/lib/libalias/alias_cuseeme.c deleted file mode 100644 index cbacc55..0000000 --- a/lib/libalias/alias_cuseeme.c +++ /dev/null @@ -1,123 +0,0 @@ -/*- - * Copyright (c) 1998 Brian Somers <brian@Awfulhak.org> - * with the aid of code written by - * Junichi SATOH <junichi@astec.co.jp> 1996, 1997. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include <stdio.h> -#include <sys/types.h> -#include <netinet/in_systm.h> -#include <netinet/in.h> -#include <netinet/ip.h> -#include <netinet/udp.h> - -#include "alias_local.h" - -/* CU-SeeMe Data Header */ -struct cu_header { - u_int16_t dest_family; - u_int16_t dest_port; - u_int32_t dest_addr; - int16_t family; - u_int16_t port; - u_int32_t addr; - u_int32_t seq; - u_int16_t msg; - u_int16_t data_type; - u_int16_t packet_len; -}; - -/* Open Continue Header */ -struct oc_header { - u_int16_t client_count; /* Number of client info structs */ - u_int32_t seq_no; - char user_name [20]; - char reserved [4]; /* flags, version stuff, etc */ -}; - -/* client info structures */ -struct client_info { - u_int32_t address;/* Client address */ - char reserved [8]; /* Flags, pruning bitfield, packet - * counts etc */ -}; - -void -AliasHandleCUSeeMeOut(struct libalias *la, struct ip *pip, struct alias_link *lnk) -{ - struct udphdr *ud = ip_next(pip); - - if (ntohs(ud->uh_ulen) - sizeof(struct udphdr) >= sizeof(struct cu_header)) { - struct cu_header *cu; - struct alias_link *cu_lnk; - - cu = udp_next(ud); - if (cu->addr) - cu->addr = (u_int32_t) GetAliasAddress(lnk).s_addr; - - cu_lnk = FindUdpTcpOut(la, pip->ip_src, GetDestAddress(lnk), - ud->uh_dport, 0, IPPROTO_UDP, 1); - -#ifndef NO_FW_PUNCH - if (cu_lnk) - PunchFWHole(cu_lnk); -#endif - } -} - -void -AliasHandleCUSeeMeIn(struct libalias *la, struct ip *pip, struct in_addr original_addr) -{ - struct in_addr alias_addr; - struct udphdr *ud; - struct cu_header *cu; - struct oc_header *oc; - struct client_info *ci; - char *end; - int i; - - (void)la; - alias_addr.s_addr = pip->ip_dst.s_addr; - ud = ip_next(pip); - cu = udp_next(ud); - oc = (struct oc_header *)(cu + 1); - ci = (struct client_info *)(oc + 1); - end = (char *)ud + ntohs(ud->uh_ulen); - - if ((char *)oc <= end) { - if (cu->dest_addr) - cu->dest_addr = (u_int32_t) original_addr.s_addr; - if (ntohs(cu->data_type) == 101) - /* Find and change our address */ - for (i = 0; (char *)(ci + 1) <= end && i < oc->client_count; i++, ci++) - if (ci->address == (u_int32_t) alias_addr.s_addr) { - ci->address = (u_int32_t) original_addr.s_addr; - break; - } - } -} |
