mirror of
https://gitlab.nic.cz/labs/bird.git
synced 2024-11-18 17:18:42 +00:00
140 lines
5.5 KiB
C
140 lines
5.5 KiB
C
/*
|
|
* BIRD Socket Interface
|
|
*
|
|
* (c) 1998--2004 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 <errno.h>
|
|
|
|
#include "lib/resource.h"
|
|
|
|
typedef struct birdsock {
|
|
resource r;
|
|
pool *pool; /* Pool where incoming connections should be allocated (for SK_xxx_PASSIVE) */
|
|
int type; /* Socket type */
|
|
void *data; /* User data */
|
|
ip_addr saddr, daddr; /* IPA_NONE = unspecified */
|
|
uint sport, dport; /* 0 = unspecified (for IP: protocol type) */
|
|
int tos; /* TOS / traffic class, -1 = default */
|
|
int priority; /* Local socket priority, -1 = default */
|
|
int ttl; /* Time To Live, -1 = default */
|
|
u32 flags;
|
|
struct iface *iface; /* Interface; specify this for broad/multicast sockets */
|
|
|
|
byte *rbuf, *rpos; /* NULL=allocate automatically */
|
|
uint 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 */
|
|
uint tbsize;
|
|
void (*tx_hook)(struct birdsock *);
|
|
|
|
void (*err_hook)(struct birdsock *, int); /* errno or zero if EOF */
|
|
|
|
/* Information about received datagrams (UDP, RAW), valid in rx_hook */
|
|
ip_addr faddr, laddr; /* src (From) and dst (Local) address of the datagram */
|
|
uint fport; /* src port of the datagram */
|
|
uint lifindex; /* local interface that received the datagram */
|
|
/* laddr and lifindex are valid only if SKF_LADDR_RX flag is set to request it */
|
|
|
|
int af; /* Address family (AF_INET, AF_INET6 or 0 for non-IP) of fd */
|
|
int fd; /* System-dependent data */
|
|
int index; /* Index in poll buffer */
|
|
int rcv_ttl; /* TTL of last received datagram */
|
|
node n;
|
|
void *rbuf_alloc, *tbuf_alloc;
|
|
char *password; /* Password for MD5 authentication */
|
|
char *err; /* Error message */
|
|
} sock;
|
|
|
|
sock *sock_new(pool *); /* Allocate new socket */
|
|
#define sk_new(X) sock_new(X) /* Wrapper to avoid name collision with OpenSSL */
|
|
|
|
int sk_open(sock *); /* Open socket */
|
|
int sk_rx_ready(sock *s);
|
|
int sk_send(sock *, uint len); /* Send data, <0=err, >0=ok, 0=sleep */
|
|
int sk_send_to(sock *, uint len, ip_addr to, uint port); /* sk_send to given destination */
|
|
void sk_reallocate(sock *); /* Free and allocate tbuf & rbuf */
|
|
void sk_set_rbsize(sock *s, uint val); /* Resize RX buffer */
|
|
void sk_set_tbsize(sock *s, uint val); /* Resize TX buffer, keeping content */
|
|
void sk_set_tbuf(sock *s, void *tbuf); /* Switch TX buffer, NULL-> return to internal */
|
|
void sk_dump_all(void);
|
|
|
|
int sk_is_ipv4(sock *s); /* True if socket is IPv4 */
|
|
int sk_is_ipv6(sock *s); /* True if socket is IPv6 */
|
|
|
|
static inline int sk_send_buffer_empty(sock *sk)
|
|
{ return sk->tbuf == sk->tpos; }
|
|
|
|
int sk_setup_multicast(sock *s); /* Prepare UDP or IP socket for multicasting */
|
|
int sk_join_group(sock *s, ip_addr maddr); /* Join multicast group on sk iface */
|
|
int sk_leave_group(sock *s, ip_addr maddr); /* Leave multicast group on sk iface */
|
|
int sk_setup_broadcast(sock *s);
|
|
int sk_set_ttl(sock *s, int ttl); /* Set transmit TTL for given socket */
|
|
int sk_set_min_ttl(sock *s, int ttl); /* Set minimal accepted TTL for given socket */
|
|
int sk_set_md5_auth(sock *s, ip_addr a, struct iface *ifa, char *passwd);
|
|
int sk_set_ipv6_checksum(sock *s, int offset);
|
|
int sk_set_icmp6_filter(sock *s, int p1, int p2);
|
|
void sk_log_error(sock *s, const char *p);
|
|
|
|
byte * sk_rx_buffer(sock *s, int *len); /* Temporary */
|
|
|
|
extern int sk_priority_control; /* Suggested priority for control traffic, should be sysdep define */
|
|
|
|
|
|
/* Socket flags */
|
|
|
|
#define SKF_V4ONLY 0x01 /* Use IPv4 for IP sockets */
|
|
#define SKF_V6ONLY 0x02 /* Use IPV6_V6ONLY socket option */
|
|
#define SKF_LADDR_RX 0x04 /* Report local address for RX packets */
|
|
#define SKF_TTL_RX 0x08 /* Report TTL / Hop Limit for RX packets */
|
|
#define SKF_BIND 0x10 /* Bind datagram socket to given source address */
|
|
#define SKF_HIGH_PORT 0x20 /* Choose port from high range if possible */
|
|
|
|
#define SKF_THREAD 0x100 /* Socked used in thread, Do not add to main loop */
|
|
#define SKF_TRUNCATED 0x200 /* Received packet was truncated, set by IO layer */
|
|
#define SKF_HDRINCL 0x400 /* Used internally */
|
|
#define SKF_PKTINFO 0x800 /* Used internally */
|
|
|
|
/*
|
|
* 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_IP 5 /* ? - ? * ? ? ? */
|
|
#define SK_MAGIC 7 /* Internal use by sysdep code */
|
|
#define SK_UNIX_PASSIVE 8
|
|
#define SK_UNIX 9
|
|
|
|
/*
|
|
* For SK_UDP or SK_IP sockets setting DA/DP allows to use sk_send(),
|
|
* otherwise sk_send_to() must be used.
|
|
*
|
|
* For SK_IP sockets setting DP specifies protocol number, which is used
|
|
* for both receiving and sending.
|
|
*
|
|
* For multicast on SK_UDP or SK_IP sockets set IF and TTL,
|
|
* call sk_setup_multicast() to enable multicast on that socket,
|
|
* and then use sk_join_group() and sk_leave_group() to manage
|
|
* a set of received multicast groups.
|
|
*
|
|
* For datagram (SK_UDP, SK_IP) sockets, there are two ways to handle
|
|
* source address. The socket could be bound to it using bind()
|
|
* syscall, but that also forbids the reception of multicast packets,
|
|
* or the address could be set on per-packet basis using platform
|
|
* dependent options (but these are not available in some corner
|
|
* cases). The first way is used when SKF_BIND is specified, the
|
|
* second way is used otherwise.
|
|
*/
|
|
|
|
#endif
|