0.3.1/include/net.h

#ifndef NET_H
#define NET_H

/*
 *  Copyright (C) 2004-2005  Anders Gavare.  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.
 *  3. The name of the author may not be used to endorse or promote products
 *     derived from this software without specific prior written permission.
 *
 *  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.
 *
 *
 *  $Id: net.h,v 1.11 2005/03/14 19:14:03 debug Exp $
 *
 *  Emulated network support.  (See net.c for more info.)
 */

#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>

struct emul;
struct ethernet_packet_link;


/*****************************************************************************/

/*  NOTE: udp_connection and tcp_connection are actually for
          internal use only.  */
struct udp_connection {
        int             in_use;
        int64_t         last_used_timestamp;

        /*  Inside:  */
        unsigned char   ethernet_address[6];
        unsigned char   inside_ip_address[4];
        int             inside_udp_port;

        /*  TODO: Fragment support for outgoing packets!  */
        int             fake_ns;

        /*  Outside:  */
        int             udp_id;
        int             socket;
        unsigned char   outside_ip_address[4];
        int             outside_udp_port;
};

struct tcp_connection {
        int             in_use;
        int64_t         last_used_timestamp;

        /*  Inside:  */
        unsigned char   ethernet_address[6];
        unsigned char   inside_ip_address[4];
        int             inside_tcp_port;
        uint32_t        inside_timestamp;

        /*  TODO:  tx and rx buffers?  */
        unsigned char   *incoming_buf;
        int             incoming_buf_rounds;
        int             incoming_buf_len;
        uint32_t        incoming_buf_seqnr;

        uint32_t        inside_seqnr;
        uint32_t        inside_acknr;
        uint32_t        outside_seqnr;
        uint32_t        outside_acknr;

        /*  Outside:  */
        int             state;
        int             tcp_id;
        int             socket;
        unsigned char   outside_ip_address[4];
        int             outside_tcp_port;
        uint32_t        outside_timestamp;
};

/*****************************************************************************/


#define MAX_TCP_CONNECTIONS     60
#define MAX_UDP_CONNECTIONS     60

struct net {
        /*  The emul struct which this net belong to:  */
        struct emul     *emul;

        /*  The network's addresses:  */
        struct in_addr  netmask_ipv4;
        int             netmask_ipv4_len;

        /*  NICs connected to this network:  */
        int             n_nics;
        void            **nic_extra;    /*  one void * per NIC  */

        /*  The "special machine":  */
        unsigned char   gateway_ipv4_addr[4];
        unsigned char   gateway_ethernet_addr[6];

        /*  Read from /etc/resolv.conf:  */
        char            *domain_name;
        int             nameserver_known;
        struct in_addr  nameserver_ipv4;

        int64_t         timestamp;

        struct ethernet_packet_link *first_ethernet_packet;
        struct ethernet_packet_link *last_ethernet_packet;

        struct udp_connection udp_connections[MAX_UDP_CONNECTIONS];
        struct tcp_connection tcp_connections[MAX_TCP_CONNECTIONS];
};

/*  net.c:  */
void net_generate_unique_mac(struct machine *, unsigned char *macbuf);
int net_ethernet_rx_avail(struct net *net, void *extra);
int net_ethernet_rx(struct net *net, void *extra,
        unsigned char **packetp, int *lenp);
void net_ethernet_tx(struct net *net, void *extra,
        unsigned char *packet, int len);
void net_dumpinfo(struct net *net);
void net_add_nic(struct net *net, void *extra, unsigned char *macaddr);
struct net *net_init(struct emul *emul, int init_flags,
        char *ipv4addr, int netipv4len);

/*  Flag used to signify that this net should have a gateway:  */
#define NET_INIT_FLAG_GATEWAY           1


/*
 *  This is for internal use in src/net.c:
 */

struct ethernet_packet_link {
        struct ethernet_packet_link *prev;
        struct ethernet_packet_link *next;

        void            *extra;
        unsigned char   *data;
        int             len;
};


#define TCP_OUTSIDE_TRYINGTOCONNECT     1
#define TCP_OUTSIDE_CONNECTED           2
#define TCP_OUTSIDE_DISCONNECTED        3
#define TCP_OUTSIDE_DISCONNECTED2       4

#define TCP_INCOMING_BUF_LEN    2000


#endif  /*  NET_H  */
1	#ifndef NET_H
2	#define NET_H
3
4	/*
5	* Copyright (C) 2004-2005 Anders Gavare. All rights reserved.
6	*
7	* Redistribution and use in source and binary forms, with or without
8	* modification, are permitted provided that the following conditions are met:
9	*
10	* 1. Redistributions of source code must retain the above copyright
11	* notice, this list of conditions and the following disclaimer.
12	* 2. Redistributions in binary form must reproduce the above copyright
13	* notice, this list of conditions and the following disclaimer in the
14	* documentation and/or other materials provided with the distribution.
15	* 3. The name of the author may not be used to endorse or promote products
16	* derived from this software without specific prior written permission.
17	*
18	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21	* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28	* SUCH DAMAGE.
29	*
30	*
31	* $Id: net.h,v 1.11 2005/03/14 19:14:03 debug Exp $
32	*
33	* Emulated network support. (See net.c for more info.)
34	*/
35
36	#include <netinet/in.h>
37	#include <arpa/inet.h>
38	#include <netdb.h>
39
40	struct emul;
41	struct ethernet_packet_link;
42
43
44	/*****************************************************************************/
45
46	/* NOTE: udp_connection and tcp_connection are actually for
47	internal use only. */
48	struct udp_connection {
49	int in_use;
50	int64_t last_used_timestamp;
51
52	/* Inside: */
53	unsigned char ethernet_address[6];
54	unsigned char inside_ip_address[4];
55	int inside_udp_port;
56
57	/* TODO: Fragment support for outgoing packets! */
58	int fake_ns;
59
60	/* Outside: */
61	int udp_id;
62	int socket;
63	unsigned char outside_ip_address[4];
64	int outside_udp_port;
65	};
66
67	struct tcp_connection {
68	int in_use;
69	int64_t last_used_timestamp;
70
71	/* Inside: */
72	unsigned char ethernet_address[6];
73	unsigned char inside_ip_address[4];
74	int inside_tcp_port;
75	uint32_t inside_timestamp;
76
77	/* TODO: tx and rx buffers? */
78	unsigned char *incoming_buf;
79	int incoming_buf_rounds;
80	int incoming_buf_len;
81	uint32_t incoming_buf_seqnr;
82
83	uint32_t inside_seqnr;
84	uint32_t inside_acknr;
85	uint32_t outside_seqnr;
86	uint32_t outside_acknr;
87
88	/* Outside: */
89	int state;
90	int tcp_id;
91	int socket;
92	unsigned char outside_ip_address[4];
93	int outside_tcp_port;
94	uint32_t outside_timestamp;
95	};
96
97	/*****************************************************************************/
98
99
100	#define MAX_TCP_CONNECTIONS 60
101	#define MAX_UDP_CONNECTIONS 60
102
103	struct net {
104	/* The emul struct which this net belong to: */
105	struct emul *emul;
106
107	/* The network's addresses: */
108	struct in_addr netmask_ipv4;
109	int netmask_ipv4_len;
110
111	/* NICs connected to this network: */
112	int n_nics;
113	void *nic_extra; / one void * per NIC */
114
115	/* The "special machine": */
116	unsigned char gateway_ipv4_addr[4];
117	unsigned char gateway_ethernet_addr[6];
118
119	/* Read from /etc/resolv.conf: */
120	char *domain_name;
121	int nameserver_known;
122	struct in_addr nameserver_ipv4;
123
124	int64_t timestamp;
125
126	struct ethernet_packet_link *first_ethernet_packet;
127	struct ethernet_packet_link *last_ethernet_packet;
128
129	struct udp_connection udp_connections[MAX_UDP_CONNECTIONS];
130	struct tcp_connection tcp_connections[MAX_TCP_CONNECTIONS];
131	};
132
133	/* net.c: */
134	void net_generate_unique_mac(struct machine , unsigned char macbuf);
135	int net_ethernet_rx_avail(struct net net, void extra);
136	int net_ethernet_rx(struct net net, void extra,
137	unsigned char *packetp, int lenp);
138	void net_ethernet_tx(struct net net, void extra,
139	unsigned char *packet, int len);
140	void net_dumpinfo(struct net *net);
141	void net_add_nic(struct net net, void extra, unsigned char *macaddr);
142	struct net net_init(struct emul emul, int init_flags,
143	char *ipv4addr, int netipv4len);
144
145	/* Flag used to signify that this net should have a gateway: */
146	#define NET_INIT_FLAG_GATEWAY 1
147
148
149	/*
150	* This is for internal use in src/net.c:
151	*/
152
153	struct ethernet_packet_link {
154	struct ethernet_packet_link *prev;
155	struct ethernet_packet_link *next;
156
157	void *extra;
158	unsigned char *data;
159	int len;
160	};
161
162
163	#define TCP_OUTSIDE_TRYINGTOCONNECT 1
164	#define TCP_OUTSIDE_CONNECTED 2
165	#define TCP_OUTSIDE_DISCONNECTED 3
166	#define TCP_OUTSIDE_DISCONNECTED2 4
167
168	#define TCP_INCOMING_BUF_LEN 2000
169
170
171	#endif /* NET_H */