1 | /* SPDX-License-Identifier: BSD-3-Clause */ |
2 | /* |
3 | * Copyright (c) 1995 Danny Gasparovski. |
4 | */ |
5 | |
6 | #ifndef SLIRP_SOCKET_H |
7 | #define SLIRP_SOCKET_H |
8 | |
9 | #include "misc.h" |
10 | |
11 | #define SO_EXPIRE 240000 |
12 | #define SO_EXPIREFAST 10000 |
13 | |
14 | /* |
15 | * Our socket structure |
16 | */ |
17 | |
18 | union slirp_sockaddr { |
19 | struct sockaddr_storage ss; |
20 | struct sockaddr_in sin; |
21 | struct sockaddr_in6 sin6; |
22 | }; |
23 | |
24 | struct socket { |
25 | struct socket *so_next, *so_prev; /* For a linked list of sockets */ |
26 | |
27 | int s; /* The actual socket */ |
28 | struct gfwd_list *guestfwd; |
29 | |
30 | int pollfds_idx; /* GPollFD GArray index */ |
31 | |
32 | Slirp *slirp; /* managing slirp instance */ |
33 | |
34 | /* XXX union these with not-yet-used sbuf params */ |
35 | struct mbuf *so_m; /* Pointer to the original SYN packet, |
36 | * for non-blocking connect()'s, and |
37 | * PING reply's */ |
38 | struct tcpiphdr *so_ti; /* Pointer to the original ti within |
39 | * so_mconn, for non-blocking connections */ |
40 | uint32_t so_urgc; |
41 | union slirp_sockaddr fhost; /* Foreign host */ |
42 | #define so_faddr fhost.sin.sin_addr |
43 | #define so_fport fhost.sin.sin_port |
44 | #define so_faddr6 fhost.sin6.sin6_addr |
45 | #define so_fport6 fhost.sin6.sin6_port |
46 | #define so_ffamily fhost.ss.ss_family |
47 | |
48 | union slirp_sockaddr lhost; /* Local host */ |
49 | #define so_laddr lhost.sin.sin_addr |
50 | #define so_lport lhost.sin.sin_port |
51 | #define so_laddr6 lhost.sin6.sin6_addr |
52 | #define so_lport6 lhost.sin6.sin6_port |
53 | #define so_lfamily lhost.ss.ss_family |
54 | |
55 | uint8_t so_iptos; /* Type of service */ |
56 | uint8_t so_emu; /* Is the socket emulated? */ |
57 | |
58 | uint8_t so_type; /* Type of socket, UDP or TCP */ |
59 | int32_t so_state; /* internal state flags SS_*, below */ |
60 | |
61 | struct tcpcb *so_tcpcb; /* pointer to TCP protocol control block */ |
62 | unsigned so_expire; /* When the socket will expire */ |
63 | |
64 | int so_queued; /* Number of packets queued from this socket */ |
65 | int so_nqueued; /* Number of packets queued in a row |
66 | * Used to determine when to "downgrade" a session |
67 | * from fastq to batchq */ |
68 | |
69 | struct sbuf so_rcv; /* Receive buffer */ |
70 | struct sbuf so_snd; /* Send buffer */ |
71 | }; |
72 | |
73 | |
74 | /* |
75 | * Socket state bits. (peer means the host on the Internet, |
76 | * local host means the host on the other end of the modem) |
77 | */ |
78 | #define SS_NOFDREF 0x001 /* No fd reference */ |
79 | |
80 | #define SS_ISFCONNECTING \ |
81 | 0x002 /* Socket is connecting to peer (non-blocking connect()'s) */ |
82 | #define SS_ISFCONNECTED 0x004 /* Socket is connected to peer */ |
83 | #define SS_FCANTRCVMORE \ |
84 | 0x008 /* Socket can't receive more from peer (for half-closes) */ |
85 | #define SS_FCANTSENDMORE \ |
86 | 0x010 /* Socket can't send more to peer (for half-closes) */ |
87 | #define SS_FWDRAIN \ |
88 | 0x040 /* We received a FIN, drain data and set SS_FCANTSENDMORE */ |
89 | |
90 | #define SS_CTL 0x080 |
91 | #define SS_FACCEPTCONN \ |
92 | 0x100 /* Socket is accepting connections from a host on the internet */ |
93 | #define SS_FACCEPTONCE \ |
94 | 0x200 /* If set, the SS_FACCEPTCONN socket will die after one accept */ |
95 | |
96 | #define SS_PERSISTENT_MASK 0xf000 /* Unremovable state bits */ |
97 | #define SS_HOSTFWD 0x1000 /* Socket describes host->guest forwarding */ |
98 | #define SS_INCOMING \ |
99 | 0x2000 /* Connection was initiated by a host on the internet */ |
100 | |
101 | static inline int sockaddr_equal(struct sockaddr_storage *a, |
102 | struct sockaddr_storage *b) |
103 | { |
104 | if (a->ss_family != b->ss_family) { |
105 | return 0; |
106 | } |
107 | |
108 | switch (a->ss_family) { |
109 | case AF_INET: { |
110 | struct sockaddr_in *a4 = (struct sockaddr_in *)a; |
111 | struct sockaddr_in *b4 = (struct sockaddr_in *)b; |
112 | return a4->sin_addr.s_addr == b4->sin_addr.s_addr && |
113 | a4->sin_port == b4->sin_port; |
114 | } |
115 | case AF_INET6: { |
116 | struct sockaddr_in6 *a6 = (struct sockaddr_in6 *)a; |
117 | struct sockaddr_in6 *b6 = (struct sockaddr_in6 *)b; |
118 | return (in6_equal(&a6->sin6_addr, &b6->sin6_addr) && |
119 | a6->sin6_port == b6->sin6_port); |
120 | } |
121 | default: |
122 | g_assert_not_reached(); |
123 | } |
124 | |
125 | return 0; |
126 | } |
127 | |
128 | static inline socklen_t sockaddr_size(struct sockaddr_storage *a) |
129 | { |
130 | switch (a->ss_family) { |
131 | case AF_INET: |
132 | return sizeof(struct sockaddr_in); |
133 | case AF_INET6: |
134 | return sizeof(struct sockaddr_in6); |
135 | default: |
136 | g_assert_not_reached(); |
137 | } |
138 | } |
139 | |
140 | struct socket *solookup(struct socket **, struct socket *, |
141 | struct sockaddr_storage *, struct sockaddr_storage *); |
142 | struct socket *socreate(Slirp *); |
143 | void sofree(struct socket *); |
144 | int soread(struct socket *); |
145 | int sorecvoob(struct socket *); |
146 | int sosendoob(struct socket *); |
147 | int sowrite(struct socket *); |
148 | void sorecvfrom(struct socket *); |
149 | int sosendto(struct socket *, struct mbuf *); |
150 | struct socket *tcp_listen(Slirp *, uint32_t, unsigned, uint32_t, unsigned, int); |
151 | void soisfconnecting(register struct socket *); |
152 | void soisfconnected(register struct socket *); |
153 | void sofwdrain(struct socket *); |
154 | struct iovec; /* For win32 */ |
155 | size_t sopreprbuf(struct socket *so, struct iovec *iov, int *np); |
156 | int soreadbuf(struct socket *so, const char *buf, int size); |
157 | |
158 | void sotranslate_out(struct socket *, struct sockaddr_storage *); |
159 | void sotranslate_in(struct socket *, struct sockaddr_storage *); |
160 | void sotranslate_accept(struct socket *); |
161 | void sodrop(struct socket *, int num); |
162 | |
163 | |
164 | #endif /* SLIRP_SOCKET_H */ |
165 | |