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320f417357
socket hook. Replaces the SK_DELETED hack. Squashed a couple of bugs in handling of TCP sockets.
82 lines
2.6 KiB
C
82 lines
2.6 KiB
C
/*
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* BIRD Socket Interface
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*
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* (c) 1998--1999 Martin Mares <mj@ucw.cz>
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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#ifndef _BIRD_SOCKET_H_
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#define _BIRD_SOCKET_H_
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#include "lib/resource.h"
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typedef struct birdsock {
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resource r;
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pool *pool; /* Pool for socket data */
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int type; /* Socket type */
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void *data; /* User data */
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ip_addr saddr, daddr; /* IPA_NONE = unspecified */
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unsigned sport, dport; /* 0 = unspecified (for IP: protocol type) */
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int tos; /* TOS and priority, -1 = default */
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int ttl; /* Time To Live, -1 = default */
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struct iface *iface; /* Interface; specify this for broad/multicast sockets */
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byte *rbuf, *rpos; /* NULL=allocate automatically */
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unsigned rbsize;
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int (*rx_hook)(struct birdsock *, int size); /* NULL=receiving turned off, returns 1 to clear rx buffer */
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byte *tbuf, *tpos; /* NULL=allocate automatically */
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byte *ttx; /* Internal */
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unsigned tbsize;
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void (*tx_hook)(struct birdsock *);
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void (*err_hook)(struct birdsock *, int); /* errno or zero if EOF */
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ip_addr faddr; /* For packet protocols: source of current packet */
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unsigned fport;
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int fd; /* System-dependent data */
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node n;
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int entered;
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} sock;
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sock *sk_new(pool *); /* Allocate new socket */
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int sk_open(sock *); /* Open socket */
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void sk_close(sock *); /* Safe close of socket even from socket hook */
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int sk_send(sock *, unsigned len); /* Send data, <0=err, >0=ok, 0=sleep */
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int sk_send_to(sock *, unsigned len, ip_addr to, unsigned port); /* sk_send to given destination */
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void sk_dump_all(void);
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static inline int
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sk_send_buffer_empty(sock *sk)
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{
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return sk->tbuf == sk->tpos;
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}
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/*
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* Socket types SA SP DA DP IF TTL SendTo (?=may, -=must not, *=must)
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*/
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#define SK_TCP_PASSIVE 0 /* ? * - - - ? - */
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#define SK_TCP_ACTIVE 1 /* ? ? * * - ? - */
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#define SK_TCP 2
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#define SK_UDP 3 /* ? ? - - - ? ? */
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#define SK_UDP_MC 4 /* ? ? * * * * - */
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#define SK_IP 5 /* ? - - * - ? ? */
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#define SK_IP_MC 6 /* ? - * * * * - */
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#define SK_MAGIC 7 /* Internal use by sysdep code */
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#define SK_UNIX_PASSIVE 8
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#define SK_UNIX 9
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#define SK_DELETED 10 /* Internal use by sk_close */
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/*
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* Multicast sockets are slightly different from the other ones:
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* If you want to send packets only, just set the destination
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* address to the corresponding multicast group and iface to
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* the interface to be used. If you also want receiving, set
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* source address to the same multicast group as well.
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*/
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#endif
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