diff options
Diffstat (limited to 'lib/socket.h')
| -rw-r--r-- | lib/socket.h | 58 |
1 files changed, 30 insertions, 28 deletions
diff --git a/lib/socket.h b/lib/socket.h index 6babfa7b..7d1aa7ef 100644 --- a/lib/socket.h +++ b/lib/socket.h @@ -10,7 +10,6 @@ #define _BIRD_SOCKET_H_ #include <errno.h> -// #include <sys/socket.h> #include "lib/resource.h" @@ -18,6 +17,7 @@ typedef struct birdsock { resource r; pool *pool; /* Pool where incoming connections should be allocated (for SK_xxx_PASSIVE) */ int type; /* Socket type */ + int subtype; /* Socket subtype */ void *data; /* User data */ ip_addr saddr, daddr; /* IPA_NONE = unspecified */ uint sport, dport; /* 0 = unspecified (for IP: protocol type) */ @@ -45,7 +45,7 @@ typedef struct birdsock { 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 af; /* System-dependend adress family (e.g. AF_INET) */ int fd; /* System-dependent data */ int index; /* Index in poll buffer */ int rcv_ttl; /* TTL of last received datagram */ @@ -68,19 +68,12 @@ 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; } - -#ifdef IPV6 -#define sk_is_ipv4(X) 0 -#define sk_is_ipv6(X) 1 -#else -#define sk_is_ipv4(X) 1 -#define sk_is_ipv6(X) 0 -#endif - - 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 */ @@ -99,7 +92,6 @@ extern int sk_priority_control; /* Suggested priority for control traffic, shou /* 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 */ @@ -125,24 +117,34 @@ extern int sk_priority_control; /* Suggested priority for control traffic, shou #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. + * Socket subtypes + */ + +#define SK_IPV4 1 +#define SK_IPV6 2 + +/* + * For TCP/IP sockets, Address family (IPv4 or IPv6) can be specified either + * explicitly (SK_IPV4 or SK_IPV6) or implicitly (based on saddr, daddr). But + * these specifications must be consistent. + * + * 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 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 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. + * 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 |