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