1/* SPDX-License-Identifier: BSD-3-Clause */
2#ifndef SLIRP_H
3#define SLIRP_H
4
5#ifdef _WIN32
6
7/* as defined in sdkddkver.h */
8#ifndef _WIN32_WINNT
9#define _WIN32_WINNT 0x0600 /* Vista */
10#endif
11/* reduces the number of implicitly included headers */
12#ifndef WIN32_LEAN_AND_MEAN
13#define WIN32_LEAN_AND_MEAN
14#endif
15
16#include <winsock2.h>
17#include <windows.h>
18#include <ws2tcpip.h>
19#include <sys/timeb.h>
20#include <iphlpapi.h>
21
22#else
23#if !defined(__HAIKU__)
24#define O_BINARY 0
25#endif
26#endif
27
28#ifndef _WIN32
29#include <sys/uio.h>
30#include <netinet/in.h>
31#include <arpa/inet.h>
32#include <sys/socket.h>
33#include <sys/ioctl.h>
34#endif
35
36#ifdef __APPLE__
37#include <sys/filio.h>
38#endif
39
40/* Avoid conflicting with the libc insque() and remque(), which
41 have different prototypes. */
42#define insque slirp_insque
43#define remque slirp_remque
44#define quehead slirp_quehead
45
46#include "debug.h"
47#include "util.h"
48
49#include "libslirp.h"
50#include "ip.h"
51#include "ip6.h"
52#include "tcp.h"
53#include "tcp_timer.h"
54#include "tcp_var.h"
55#include "tcpip.h"
56#include "udp.h"
57#include "ip_icmp.h"
58#include "ip6_icmp.h"
59#include "mbuf.h"
60#include "sbuf.h"
61#include "socket.h"
62#include "if.h"
63#include "main.h"
64#include "misc.h"
65
66#include "bootp.h"
67#include "tftp.h"
68
69#define ARPOP_REQUEST 1 /* ARP request */
70#define ARPOP_REPLY 2 /* ARP reply */
71
72struct ethhdr {
73 unsigned char h_dest[ETH_ALEN]; /* destination eth addr */
74 unsigned char h_source[ETH_ALEN]; /* source ether addr */
75 unsigned short h_proto; /* packet type ID field */
76};
77
78struct slirp_arphdr {
79 unsigned short ar_hrd; /* format of hardware address */
80 unsigned short ar_pro; /* format of protocol address */
81 unsigned char ar_hln; /* length of hardware address */
82 unsigned char ar_pln; /* length of protocol address */
83 unsigned short ar_op; /* ARP opcode (command) */
84
85 /*
86 * Ethernet looks like this : This bit is variable sized however...
87 */
88 unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */
89 uint32_t ar_sip; /* sender IP address */
90 unsigned char ar_tha[ETH_ALEN]; /* target hardware address */
91 uint32_t ar_tip; /* target IP address */
92} SLIRP_PACKED;
93
94#define ARP_TABLE_SIZE 16
95
96typedef struct ArpTable {
97 struct slirp_arphdr table[ARP_TABLE_SIZE];
98 int next_victim;
99} ArpTable;
100
101void arp_table_add(Slirp *slirp, uint32_t ip_addr, uint8_t ethaddr[ETH_ALEN]);
102
103bool arp_table_search(Slirp *slirp, uint32_t ip_addr,
104 uint8_t out_ethaddr[ETH_ALEN]);
105
106struct ndpentry {
107 unsigned char eth_addr[ETH_ALEN]; /* sender hardware address */
108 struct in6_addr ip_addr; /* sender IP address */
109};
110
111#define NDP_TABLE_SIZE 16
112
113typedef struct NdpTable {
114 struct ndpentry table[NDP_TABLE_SIZE];
115 int next_victim;
116} NdpTable;
117
118void ndp_table_add(Slirp *slirp, struct in6_addr ip_addr,
119 uint8_t ethaddr[ETH_ALEN]);
120bool ndp_table_search(Slirp *slirp, struct in6_addr ip_addr,
121 uint8_t out_ethaddr[ETH_ALEN]);
122
123struct Slirp {
124 unsigned time_fasttimo;
125 unsigned last_slowtimo;
126 bool do_slowtimo;
127
128 bool in_enabled, in6_enabled;
129
130 /* virtual network configuration */
131 struct in_addr vnetwork_addr;
132 struct in_addr vnetwork_mask;
133 struct in_addr vhost_addr;
134 struct in6_addr vprefix_addr6;
135 uint8_t vprefix_len;
136 struct in6_addr vhost_addr6;
137 struct in_addr vdhcp_startaddr;
138 struct in_addr vnameserver_addr;
139 struct in6_addr vnameserver_addr6;
140
141 struct in_addr client_ipaddr;
142 char client_hostname[33];
143
144 int restricted;
145 struct gfwd_list *guestfwd_list;
146
147 /* mbuf states */
148 struct quehead m_freelist;
149 struct quehead m_usedlist;
150 int mbuf_alloced;
151
152 /* if states */
153 struct quehead if_fastq; /* fast queue (for interactive data) */
154 struct quehead if_batchq; /* queue for non-interactive data */
155 bool if_start_busy; /* avoid if_start recursion */
156
157 /* ip states */
158 struct ipq ipq; /* ip reass. queue */
159 uint16_t ip_id; /* ip packet ctr, for ids */
160
161 /* bootp/dhcp states */
162 BOOTPClient bootp_clients[NB_BOOTP_CLIENTS];
163 char *bootp_filename;
164 size_t vdnssearch_len;
165 uint8_t *vdnssearch;
166 char *vdomainname;
167
168 /* tcp states */
169 struct socket tcb;
170 struct socket *tcp_last_so;
171 tcp_seq tcp_iss; /* tcp initial send seq # */
172 uint32_t tcp_now; /* for RFC 1323 timestamps */
173
174 /* udp states */
175 struct socket udb;
176 struct socket *udp_last_so;
177
178 /* icmp states */
179 struct socket icmp;
180 struct socket *icmp_last_so;
181
182 /* tftp states */
183 char *tftp_prefix;
184 struct tftp_session tftp_sessions[TFTP_SESSIONS_MAX];
185 char *tftp_server_name;
186
187 ArpTable arp_table;
188 NdpTable ndp_table;
189
190 GRand *grand;
191 void *ra_timer;
192
193 const SlirpCb *cb;
194 void *opaque;
195};
196
197void if_start(Slirp *);
198
199int get_dns_addr(struct in_addr *pdns_addr);
200int get_dns6_addr(struct in6_addr *pdns6_addr, uint32_t *scope_id);
201
202/* ncsi.c */
203void ncsi_input(Slirp *slirp, const uint8_t *pkt, int pkt_len);
204
205#ifndef _WIN32
206#include <netdb.h>
207#endif
208
209
210extern bool slirp_do_keepalive;
211
212#define TCP_MAXIDLE (TCPTV_KEEPCNT * TCPTV_KEEPINTVL)
213
214/* dnssearch.c */
215int translate_dnssearch(Slirp *s, const char **names);
216
217/* cksum.c */
218int cksum(struct mbuf *m, int len);
219int ip6_cksum(struct mbuf *m);
220
221/* if.c */
222void if_init(Slirp *);
223void if_output(struct socket *, struct mbuf *);
224
225/* ip_input.c */
226void ip_init(Slirp *);
227void ip_cleanup(Slirp *);
228void ip_input(struct mbuf *);
229void ip_slowtimo(Slirp *);
230void ip_stripoptions(register struct mbuf *, struct mbuf *);
231
232/* ip_output.c */
233int ip_output(struct socket *, struct mbuf *);
234
235/* ip6_input.c */
236void ip6_init(Slirp *);
237void ip6_cleanup(Slirp *);
238void ip6_input(struct mbuf *);
239
240/* ip6_output */
241int ip6_output(struct socket *, struct mbuf *, int fast);
242
243/* tcp_input.c */
244void tcp_input(register struct mbuf *, int, struct socket *, unsigned short af);
245int tcp_mss(register struct tcpcb *, unsigned);
246
247/* tcp_output.c */
248int tcp_output(register struct tcpcb *);
249void tcp_setpersist(register struct tcpcb *);
250
251/* tcp_subr.c */
252void tcp_init(Slirp *);
253void tcp_cleanup(Slirp *);
254void tcp_template(struct tcpcb *);
255void tcp_respond(struct tcpcb *, register struct tcpiphdr *,
256 register struct mbuf *, tcp_seq, tcp_seq, int, unsigned short);
257struct tcpcb *tcp_newtcpcb(struct socket *);
258struct tcpcb *tcp_close(register struct tcpcb *);
259void tcp_sockclosed(struct tcpcb *);
260int tcp_fconnect(struct socket *, unsigned short af);
261void tcp_connect(struct socket *);
262int tcp_attach(struct socket *);
263uint8_t tcp_tos(struct socket *);
264int tcp_emu(struct socket *, struct mbuf *);
265int tcp_ctl(struct socket *);
266struct tcpcb *tcp_drop(struct tcpcb *tp, int err);
267
268struct socket *slirp_find_ctl_socket(Slirp *slirp, struct in_addr guest_addr,
269 int guest_port);
270
271void slirp_send_packet_all(Slirp *slirp, const void *buf, size_t len);
272
273#endif
274