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