aboutsummaryrefslogtreecommitdiff
path: root/slirp/slirp.h
blob: 8068ba1d1e9efdb741ec23f7be0ccf6b10c1b7e3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
#ifndef SLIRP_H
#define SLIRP_H

#ifdef _WIN32

/* as defined in sdkddkver.h */
#ifndef _WIN32_WINNT
#define _WIN32_WINNT 0x0600 /* Vista */
#endif
/* reduces the number of implicitly included headers */
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif

# include <winsock2.h>
# include <windows.h>
# include <ws2tcpip.h>
# include <sys/timeb.h>
# include <iphlpapi.h>

#else
# if !defined(__HAIKU__)
#  define O_BINARY 0
# endif
#endif

#ifndef _WIN32
#include <sys/uio.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#endif

#ifdef __APPLE__
# include <sys/filio.h>
#endif

/* Avoid conflicting with the libc insque() and remque(), which
   have different prototypes. */
#define insque slirp_insque
#define remque slirp_remque
#define quehead slirp_quehead

#include "debug.h"
#include "util.h"
#include "qtailq.h"

#include "libslirp.h"
#include "ip.h"
#include "ip6.h"
#include "tcp.h"
#include "tcp_timer.h"
#include "tcp_var.h"
#include "tcpip.h"
#include "udp.h"
#include "ip_icmp.h"
#include "ip6_icmp.h"
#include "mbuf.h"
#include "sbuf.h"
#include "socket.h"
#include "if.h"
#include "main.h"
#include "misc.h"

#include "bootp.h"
#include "tftp.h"

#define ARPOP_REQUEST 1         /* ARP request */
#define ARPOP_REPLY   2         /* ARP reply   */

struct ethhdr {
    unsigned char  h_dest[ETH_ALEN];   /* destination eth addr */
    unsigned char  h_source[ETH_ALEN]; /* source ether addr    */
    unsigned short h_proto;            /* packet type ID field */
};

struct slirp_arphdr {
    unsigned short ar_hrd;      /* format of hardware address */
    unsigned short ar_pro;      /* format of protocol address */
    unsigned char  ar_hln;      /* length of hardware address */
    unsigned char  ar_pln;      /* length of protocol address */
    unsigned short ar_op;       /* ARP opcode (command)       */

    /*
     *  Ethernet looks like this : This bit is variable sized however...
     */
    unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */
    uint32_t      ar_sip;           /* sender IP address       */
    unsigned char ar_tha[ETH_ALEN]; /* target hardware address */
    uint32_t      ar_tip;           /* target IP address       */
} SLIRP_PACKED;

#define ARP_TABLE_SIZE 16

typedef struct ArpTable {
    struct slirp_arphdr table[ARP_TABLE_SIZE];
    int next_victim;
} ArpTable;

void arp_table_add(Slirp *slirp, uint32_t ip_addr, uint8_t ethaddr[ETH_ALEN]);

bool arp_table_search(Slirp *slirp, uint32_t ip_addr,
                      uint8_t out_ethaddr[ETH_ALEN]);

struct ndpentry {
    unsigned char   eth_addr[ETH_ALEN];     /* sender hardware address */
    struct in6_addr ip_addr;                /* sender IP address       */
};

#define NDP_TABLE_SIZE 16

typedef struct NdpTable {
    struct ndpentry table[NDP_TABLE_SIZE];
    int next_victim;
} NdpTable;

void ndp_table_add(Slirp *slirp, struct in6_addr ip_addr,
                   uint8_t ethaddr[ETH_ALEN]);
bool ndp_table_search(Slirp *slirp, struct in6_addr ip_addr,
                      uint8_t out_ethaddr[ETH_ALEN]);

struct Slirp {
    QTAILQ_ENTRY(Slirp) entry;
    unsigned time_fasttimo;
    unsigned last_slowtimo;
    bool do_slowtimo;

    bool in_enabled, in6_enabled;

    /* virtual network configuration */
    struct in_addr vnetwork_addr;
    struct in_addr vnetwork_mask;
    struct in_addr vhost_addr;
    struct in6_addr vprefix_addr6;
    uint8_t vprefix_len;
    struct in6_addr vhost_addr6;
    struct in_addr vdhcp_startaddr;
    struct in_addr vnameserver_addr;
    struct in6_addr vnameserver_addr6;

    struct in_addr client_ipaddr;
    char client_hostname[33];

    int restricted;
    struct gfwd_list *guestfwd_list;

    /* mbuf states */
    struct quehead m_freelist;
    struct quehead m_usedlist;
    int mbuf_alloced;

    /* if states */
    struct quehead if_fastq;   /* fast queue (for interactive data) */
    struct quehead if_batchq;  /* queue for non-interactive data */
    bool if_start_busy;     /* avoid if_start recursion */

    /* ip states */
    struct ipq ipq;         /* ip reass. queue */
    uint16_t ip_id;         /* ip packet ctr, for ids */

    /* bootp/dhcp states */
    BOOTPClient bootp_clients[NB_BOOTP_CLIENTS];
    char *bootp_filename;
    size_t vdnssearch_len;
    uint8_t *vdnssearch;
    char *vdomainname;

    /* tcp states */
    struct socket tcb;
    struct socket *tcp_last_so;
    tcp_seq tcp_iss;        /* tcp initial send seq # */
    uint32_t tcp_now;       /* for RFC 1323 timestamps */

    /* udp states */
    struct socket udb;
    struct socket *udp_last_so;

    /* icmp states */
    struct socket icmp;
    struct socket *icmp_last_so;

    /* tftp states */
    char *tftp_prefix;
    struct tftp_session tftp_sessions[TFTP_SESSIONS_MAX];
    char *tftp_server_name;

    ArpTable arp_table;
    NdpTable ndp_table;

    GRand *grand;
    void *ra_timer;

    const SlirpCb *cb;
    void *opaque;
};

void if_start(Slirp *);

int get_dns_addr(struct in_addr *pdns_addr);
int get_dns6_addr(struct in6_addr *pdns6_addr, uint32_t *scope_id);

/* ncsi.c */
void ncsi_input(Slirp *slirp, const uint8_t *pkt, int pkt_len);

#ifndef _WIN32
#include <netdb.h>
#endif


extern bool slirp_do_keepalive;

#define TCP_MAXIDLE (TCPTV_KEEPCNT * TCPTV_KEEPINTVL)

/* dnssearch.c */
int translate_dnssearch(Slirp *s, const char ** names);

/* cksum.c */
int cksum(struct mbuf *m, int len);
int ip6_cksum(struct mbuf *m);

/* if.c */
void if_init(Slirp *);
void if_output(struct socket *, struct mbuf *);

/* ip_input.c */
void ip_init(Slirp *);
void ip_cleanup(Slirp *);
void ip_input(struct mbuf *);
void ip_slowtimo(Slirp *);
void ip_stripoptions(register struct mbuf *, struct mbuf *);

/* ip_output.c */
int ip_output(struct socket *, struct mbuf *);

/* ip6_input.c */
void ip6_init(Slirp *);
void ip6_cleanup(Slirp *);
void ip6_input(struct mbuf *);

/* ip6_output */
int ip6_output(struct socket *, struct mbuf *, int fast);

/* tcp_input.c */
void tcp_input(register struct mbuf *, int, struct socket *, unsigned short af);
int tcp_mss(register struct tcpcb *, unsigned);

/* tcp_output.c */
int tcp_output(register struct tcpcb *);
void tcp_setpersist(register struct tcpcb *);

/* tcp_subr.c */
void tcp_init(Slirp *);
void tcp_cleanup(Slirp *);
void tcp_template(struct tcpcb *);
void tcp_respond(struct tcpcb *, register struct tcpiphdr *,
        register struct mbuf *, tcp_seq, tcp_seq, int, unsigned short);
struct tcpcb * tcp_newtcpcb(struct socket *);
struct tcpcb * tcp_close(register struct tcpcb *);
void tcp_sockclosed(struct tcpcb *);
int tcp_fconnect(struct socket *, unsigned short af);
void tcp_connect(struct socket *);
int tcp_attach(struct socket *);
uint8_t tcp_tos(struct socket *);
int tcp_emu(struct socket *, struct mbuf *);
int tcp_ctl(struct socket *);
struct tcpcb *tcp_drop(struct tcpcb *tp, int err);

struct socket *
slirp_find_ctl_socket(Slirp *slirp, struct in_addr guest_addr, int guest_port);

void slirp_send_packet_all(Slirp *slirp, const void *buf, size_t len);

#endif