From 3c491a8bec71606b7af5f1d8c34de8e9710bbe13 Mon Sep 17 00:00:00 2001 From: Toni Uhlig Date: Mon, 18 Dec 2017 23:31:09 +0100 Subject: ptunnel-ng: * this is now an autotools project (added/renamed required files e.g. AUTHORS, COPYING) * removed user defined ip header (buggy; not useful anymore) --- pkt.h | 96 ------------------------------------------------------------------- 1 file changed, 96 deletions(-) delete mode 100644 pkt.h (limited to 'pkt.h') diff --git a/pkt.h b/pkt.h deleted file mode 100644 index 22c039d..0000000 --- a/pkt.h +++ /dev/null @@ -1,96 +0,0 @@ -#ifndef PKT_H -#define PKT_H 1 - -#include - -#ifdef WIN32 -#include -typedef int socklen_t; -typedef uint32_t in_addr_t; -#define ETH_ALEN 6 /* Octets in one ethernet addr */ -struct ether_header { - u_int8_t ether_dhost[ETH_ALEN]; /* destination eth addr */ - u_int8_t ether_shost[ETH_ALEN]; /* source ether addr */ - u_int16_t ether_type; /* packet type ID field */ -}; -#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]; -} __attribute__ ((packed)) 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]; -} __attribute__ ((packed)) 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]; -} __attribute__ ((packed)) icmp_echo_packet_t; - -typedef struct forward_desc_t forward_desc_t; -typedef struct icmp_desc_t icmp_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, forward_desc_t **ring, - int *await_send, int *insert_idx, uint16_t *next_expected_seq); - -void handle_ack(uint16_t seq_no, icmp_desc_t *ring, int *packets_awaiting_ack, - int one_ack_only, int insert_idx, int *first_ack, - uint16_t *remote_ack, int is_pcap); - -#endif -- cgit v1.2.3