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Diffstat (limited to 'src/pkt.h')
| -rw-r--r-- | src/pkt.h | 144 |
1 files changed, 0 insertions, 144 deletions
diff --git a/src/pkt.h b/src/pkt.h deleted file mode 100644 index 163e7b8..0000000 --- a/src/pkt.h +++ /dev/null @@ -1,144 +0,0 @@ -/* - * pkt.h - * ptunnel is licensed under the BSD license: - * - * Copyright (c) 2004-2011, Daniel Stoedle <daniels@cs.uit.no>, - * Yellow Lemon Software. All rights reserved. - * - * Copyright (c) 2017-2019, Toni Uhlig <matzeton@googlemail.com> - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are met: - * - * - Redistributions of source code must retain the above copyright notice, - * this list of conditions and the following disclaimer. - * - * - 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. - * - * - Neither the name of the Yellow Lemon Software nor the names of its - * contributors may be used to endorse or promote products derived from this - * software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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. - * - * Contacting the author: - * You can get in touch with me, Daniel Stødle (that's the Norwegian letter oe, - * in case your text editor didn't realize), here: <daniels@cs.uit.no> - * - * The official ptunnel website is here: - * <http://www.cs.uit.no/~daniels/PingTunnel/> - * - * Note that the source code is best viewed with tabs set to 4 spaces. - */ - -#ifndef PKT_H -#define PKT_H 1 - -#include <stdint.h> - -#ifndef __MINGW32__ -#define __PTATTR__ __attribute__((packed)) -#else -#define __PTATTR__ __attribute__((packed, gcc_struct)) -#endif - -#ifdef WIN32 -#include <winsock2.h> -typedef int socklen_t; -typedef uint32_t in_addr_t; -#define ETH_ALEN 6 /* Octets in one ethernet addr */ -struct ether_header { - uint8_t ether_dhost[ETH_ALEN]; /* destination eth addr */ - uint8_t ether_shost[ETH_ALEN]; /* source ether addr */ - uint16_t ether_type; /* packet type ID field */ -} __PTATTR__; -#endif /* WIN32 */ - -/** Resend packets after this interval (in seconds) */ -#define kResend_interval 1.5 - -/** ping_tunnel_pkt_t: This data structure represents the header of a ptunnel - * packet, consisting of a magic number, the tunnel's destination IP and port, - * as well as some other fields. Note that the dest IP and port is only valid - * in packets from the client to the proxy. - */ -typedef struct { - /** magic number, used to identify ptunnel packets. */ - uint32_t magic; - /** destination IP and port (used by proxy to figure */ - uint32_t dst_ip; - /** out where to tunnel to) */ - uint32_t dst_port; - /** current connection state; see constants above. */ - uint32_t state; - /** sequence number of last packet received from other end */ - uint32_t ack; - /** length of data buffer */ - uint32_t data_len; - /** sequence number of this packet */ - uint16_t seq_no; - /** id number, used to separate different tunnels from each other */ - uint16_t id_no; - /** optional data buffer */ - char data[0]; -} __PTATTR__ ping_tunnel_pkt_t; - -/** ip_packet_t: This is basically my own definition of the IP packet, which - * of course complies with the official definition ;) See any good book on IP - * (or even the RFC) for info on the contents of this packet. - */ -typedef struct { - uint8_t vers_ihl; - uint8_t tos; - uint16_t pkt_len; - uint16_t id; - uint16_t flags_frag_offset; - uint8_t ttl; - uint8_t proto; // 1 for ICMP - uint16_t checksum; - uint32_t src_ip; - uint32_t dst_ip; - char data[0]; -} __PTATTR__ ip_packet_t; - -/** icmp_echo_packet_t: This is the definition of a standard ICMP header. The - * ptunnel packets are constructed as follows: - * [ ip header (20 bytes) ] - * [ icmp header (8 bytes) ] - * [ ptunnel header (28 bytes) ] - * - * We actually only create the ICMP and ptunnel headers, the IP header is - * taken care of by the OS. - */ -typedef struct { - uint8_t type; - uint8_t code; - uint16_t checksum; - uint16_t identifier; - uint16_t seq; - char data[0]; -} __PTATTR__ icmp_echo_packet_t; - -typedef struct forward_desc_t forward_desc_t; -typedef struct icmp_desc_t icmp_desc_t; -typedef struct proxy_desc_t proxy_desc_t; - -void handle_packet(char * buf, unsigned bytes, int is_pcap, struct sockaddr_in * addr, int icmp_sock); - -void handle_data(icmp_echo_packet_t * pkt, int total_len, proxy_desc_t * cur); - -void handle_ack(uint32_t seq_no, proxy_desc_t * cur); - -#endif |