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/* SPDX-License-Identifier: BSD-3-Clause */
/*
* Copyright (c) 1995 Danny Gasparovski.
*/
#ifndef SLIRP_SOCKET_H
#define SLIRP_SOCKET_H
#include "misc.h"
#define SO_EXPIRE 240000
#define SO_EXPIREFAST 10000
/*
* Our socket structure
*/
union slirp_sockaddr {
struct sockaddr_storage ss;
struct sockaddr_in sin;
struct sockaddr_in6 sin6;
};
struct socket {
struct socket *so_next,*so_prev; /* For a linked list of sockets */
int s; /* The actual socket */
struct gfwd_list *guestfwd;
int pollfds_idx; /* GPollFD GArray index */
Slirp *slirp; /* managing slirp instance */
/* XXX union these with not-yet-used sbuf params */
struct mbuf *so_m; /* Pointer to the original SYN packet,
* for non-blocking connect()'s, and
* PING reply's */
struct tcpiphdr *so_ti; /* Pointer to the original ti within
* so_mconn, for non-blocking connections */
uint32_t so_urgc;
union slirp_sockaddr fhost; /* Foreign host */
#define so_faddr fhost.sin.sin_addr
#define so_fport fhost.sin.sin_port
#define so_faddr6 fhost.sin6.sin6_addr
#define so_fport6 fhost.sin6.sin6_port
#define so_ffamily fhost.ss.ss_family
union slirp_sockaddr lhost; /* Local host */
#define so_laddr lhost.sin.sin_addr
#define so_lport lhost.sin.sin_port
#define so_laddr6 lhost.sin6.sin6_addr
#define so_lport6 lhost.sin6.sin6_port
#define so_lfamily lhost.ss.ss_family
uint8_t so_iptos; /* Type of service */
uint8_t so_emu; /* Is the socket emulated? */
uint8_t so_type; /* Type of socket, UDP or TCP */
int32_t so_state; /* internal state flags SS_*, below */
struct tcpcb *so_tcpcb; /* pointer to TCP protocol control block */
unsigned so_expire; /* When the socket will expire */
int so_queued; /* Number of packets queued from this socket */
int so_nqueued; /* Number of packets queued in a row
* Used to determine when to "downgrade" a session
* from fastq to batchq */
struct sbuf so_rcv; /* Receive buffer */
struct sbuf so_snd; /* Send buffer */
};
/*
* Socket state bits. (peer means the host on the Internet,
* local host means the host on the other end of the modem)
*/
#define SS_NOFDREF 0x001 /* No fd reference */
#define SS_ISFCONNECTING 0x002 /* Socket is connecting to peer (non-blocking connect()'s) */
#define SS_ISFCONNECTED 0x004 /* Socket is connected to peer */
#define SS_FCANTRCVMORE 0x008 /* Socket can't receive more from peer (for half-closes) */
#define SS_FCANTSENDMORE 0x010 /* Socket can't send more to peer (for half-closes) */
#define SS_FWDRAIN 0x040 /* We received a FIN, drain data and set SS_FCANTSENDMORE */
#define SS_CTL 0x080
#define SS_FACCEPTCONN 0x100 /* Socket is accepting connections from a host on the internet */
#define SS_FACCEPTONCE 0x200 /* If set, the SS_FACCEPTCONN socket will die after one accept */
#define SS_PERSISTENT_MASK 0xf000 /* Unremovable state bits */
#define SS_HOSTFWD 0x1000 /* Socket describes host->guest forwarding */
#define SS_INCOMING 0x2000 /* Connection was initiated by a host on the internet */
static inline int sockaddr_equal(struct sockaddr_storage *a,
struct sockaddr_storage *b)
{
if (a->ss_family != b->ss_family) {
return 0;
}
switch (a->ss_family) {
case AF_INET:
{
struct sockaddr_in *a4 = (struct sockaddr_in *) a;
struct sockaddr_in *b4 = (struct sockaddr_in *) b;
return a4->sin_addr.s_addr == b4->sin_addr.s_addr
&& a4->sin_port == b4->sin_port;
}
case AF_INET6:
{
struct sockaddr_in6 *a6 = (struct sockaddr_in6 *) a;
struct sockaddr_in6 *b6 = (struct sockaddr_in6 *) b;
return (in6_equal(&a6->sin6_addr, &b6->sin6_addr)
&& a6->sin6_port == b6->sin6_port);
}
default:
g_assert_not_reached();
}
return 0;
}
static inline socklen_t sockaddr_size(struct sockaddr_storage *a)
{
switch (a->ss_family) {
case AF_INET:
return sizeof(struct sockaddr_in);
case AF_INET6:
return sizeof(struct sockaddr_in6);
default:
g_assert_not_reached();
}
}
struct socket *solookup(struct socket **, struct socket *,
struct sockaddr_storage *, struct sockaddr_storage *);
struct socket *socreate(Slirp *);
void sofree(struct socket *);
int soread(struct socket *);
int sorecvoob(struct socket *);
int sosendoob(struct socket *);
int sowrite(struct socket *);
void sorecvfrom(struct socket *);
int sosendto(struct socket *, struct mbuf *);
struct socket * tcp_listen(Slirp *, uint32_t, unsigned, uint32_t, unsigned,
int);
void soisfconnecting(register struct socket *);
void soisfconnected(register struct socket *);
void sofwdrain(struct socket *);
struct iovec; /* For win32 */
size_t sopreprbuf(struct socket *so, struct iovec *iov, int *np);
int soreadbuf(struct socket *so, const char *buf, int size);
void sotranslate_out(struct socket *, struct sockaddr_storage *);
void sotranslate_in(struct socket *, struct sockaddr_storage *);
void sotranslate_accept(struct socket *);
void sodrop(struct socket *, int num);
#endif /* SLIRP_SOCKET_H */
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