inet.h

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/** IPv4/IPv6 address helpers, cf. the inet.[ch] wrapper in SMCRoute */
#ifndef MDNSD_INET_H_
#define MDNSD_INET_H_
 
#include <netinet/in.h>
#include <sys/socket.h>
 
#define INET_ADDRSTR_LEN INET6_ADDRSTRLEN   /* fits AF_INET and AF_INET6 */
 
/*
 * Wrapper for an IPv4 or IPv6 socket address.  Everything is kept in a
 * sockaddr_storage and the family is inspected through the helpers below,
 * so the rest of mdnsd does not need to special-case AF_INET vs AF_INET6.
 */
typedef struct sockaddr_storage inet_addr_t;
 
/** Family of @ss, AF_INET or AF_INET6 */
sa_family_t inet_family(const inet_addr_t *ss);
 
/** Length of the concrete sockaddr in @ss, for bind()/connect()/sendto() */
socklen_t   inet_len(const inet_addr_t *ss);
 
/** Port in host byte order, regardless of family */
in_port_t   inet_port(const inet_addr_t *ss);
 
/** Set the port (host byte order) in the correct family-specific field */
void        inet_set_port(inet_addr_t *ss, in_port_t port);
 
/** Initialize @ss to the wildcard address of @family with @port */
void        inet_anyaddr(sa_family_t family, in_port_t port, inet_addr_t *ss);
 
/** Presentation string of the address in @ss, e.g. for logging */
const char *inet_ntop2(const inet_addr_t *ss, char *buf, size_t len);
 
#endif /* MDNSD_INET_H_ */