treewide: Use sa_family_t for address family variables

Sometimes we use sa_family_t for variables and parameters containing a
socket address family, other times we use a plain int.  Since sa_family_t
is what's actually used in struct sockaddr and friends, standardise on
that.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

icmp.c

@@ -62,7 +62,7 @@ static struct icmp_id_sock icmp_id_map[IP_VERSIONS][ICMP_NUM_IDS];
  * @af:		Address family (AF_INET or AF_INET6)
  * @ref:	epoll reference
  */
-void icmp_sock_handler(const struct ctx *c, int af, union epoll_ref ref)
+void icmp_sock_handler(const struct ctx *c, sa_family_t af, union epoll_ref ref)
 {
 	struct icmp_id_sock *const id_sock = af == AF_INET
 		? &icmp_id_map[V4][ref.icmp.id] : &icmp_id_map[V6][ref.icmp.id];
@@ -156,7 +156,7 @@ static void icmp_ping_close(const struct ctx *c, struct icmp_id_sock *id_sock)
  * Return: Newly opened ping socket fd, or -1 on failure
  */
 static int icmp_ping_new(const struct ctx *c, struct icmp_id_sock *id_sock,
-			 int af, uint16_t id)
+			 sa_family_t af, uint16_t id)
 {
 	uint8_t proto = af == AF_INET ? IPPROTO_ICMP : IPPROTO_ICMPV6;
 	const char *const pname = af == AF_INET ? "ICMP" : "ICMPv6";
@@ -209,7 +209,7 @@ cancel:
  *
  * Return: count of consumed packets (always 1, even if malformed)
  */
-int icmp_tap_handler(const struct ctx *c, uint8_t pif, int af,
+int icmp_tap_handler(const struct ctx *c, uint8_t pif, sa_family_t af,
 		     const void *saddr, const void *daddr,
 		     const struct pool *p, const struct timespec *now)
 {

icmp.h

@@ -10,8 +10,8 @@
 
 struct ctx;
 
-void icmp_sock_handler(const struct ctx *c, int af, union epoll_ref ref);
+void icmp_sock_handler(const struct ctx *c, sa_family_t af, union epoll_ref ref);
-int icmp_tap_handler(const struct ctx *c, uint8_t pif, int af,
+int icmp_tap_handler(const struct ctx *c, uint8_t pif, sa_family_t af,
 		     const void *saddr, const void *daddr,
 		     const struct pool *p, const struct timespec *now);
 void icmp_timer(const struct ctx *c, const struct timespec *now);

inany.h

@@ -60,7 +60,8 @@ static inline bool inany_equals(const union inany_addr *a,
  * @af:		Address family of @addr
  * @addr:	struct in_addr (IPv4) or struct in6_addr (IPv6)
  */
-static inline void inany_from_af(union inany_addr *aa, int af, const void *addr)
+static inline void inany_from_af(union inany_addr *aa,
+				 sa_family_t af, const void *addr)
 {
 	if (af == AF_INET6) {
 		aa->a6 = *((struct in6_addr *)addr);

tcp.c

@@ -1262,7 +1262,7 @@ static void tcp_hash_remove(const struct ctx *c,
  * Return: connection pointer, if found, -ENOENT otherwise
  */
 static struct tcp_tap_conn *tcp_hash_lookup(const struct ctx *c,
-					    int af, const void *faddr,
+					    sa_family_t af, const void *faddr,
 					    in_port_t eport, in_port_t fport)
 {
 	union inany_addr aany;
@@ -1904,8 +1904,8 @@ static void tcp_bind_outbound(const struct ctx *c, int s, sa_family_t af)
  * @optlen:	Bytes in options: caller MUST ensure available length
  * @now:	Current timestamp
  */
-static void tcp_conn_from_tap(struct ctx *c,
+static void tcp_conn_from_tap(struct ctx *c, sa_family_t af,
-			      int af, const void *saddr, const void *daddr,
+			      const void *saddr, const void *daddr,
 			      const struct tcphdr *th, const char *opts,
 			      size_t optlen, const struct timespec *now)
 {
@@ -2479,7 +2479,7 @@ static void tcp_conn_from_sock_finish(struct ctx *c, struct tcp_tap_conn *conn,
  *
  * Return: count of consumed packets
  */
-int tcp_tap_handler(struct ctx *c, uint8_t pif, int af,
+int tcp_tap_handler(struct ctx *c, uint8_t pif, sa_family_t af,
 		    const void *saddr, const void *daddr,
 		    const struct pool *p, int idx, const struct timespec *now)
 {
@@ -2856,7 +2856,7 @@ void tcp_sock_handler(struct ctx *c, union epoll_ref ref, uint32_t events)
  *
  * Return: fd for the new listening socket, negative error code on failure
  */
-static int tcp_sock_init_af(const struct ctx *c, int af, in_port_t port,
+static int tcp_sock_init_af(const struct ctx *c, sa_family_t af, in_port_t port,
 			    const void *addr, const char *ifname)
 {
 	union tcp_listen_epoll_ref tref = {
@@ -3008,7 +3008,7 @@ static int tcp_ns_socks_init(void *arg)
  * @pool:	Pool of sockets to refill
  * @af:		Address family to use
  */
-void tcp_sock_refill_pool(const struct ctx *c, int pool[], int af)
+void tcp_sock_refill_pool(const struct ctx *c, int pool[], sa_family_t af)
 {
 	int i;
 

tcp.h

@@ -14,7 +14,7 @@ void tcp_timer_handler(struct ctx *c, union epoll_ref ref);
 void tcp_listen_handler(struct ctx *c, union epoll_ref ref,
 			const struct timespec *now);
 void tcp_sock_handler(struct ctx *c, union epoll_ref ref, uint32_t events);
-int tcp_tap_handler(struct ctx *c, uint8_t pif, int af,
+int tcp_tap_handler(struct ctx *c, uint8_t pif, sa_family_t af,
 		    const void *saddr, const void *daddr,
 		    const struct pool *p, int idx, const struct timespec *now);
 int tcp_sock_init(const struct ctx *c, sa_family_t af, const void *addr,

tcp_conn.h

@@ -160,7 +160,7 @@ bool tcp_splice_flow_defer(union flow *flow);
 void tcp_splice_timer(const struct ctx *c, union flow *flow);
 int tcp_conn_pool_sock(int pool[]);
 int tcp_conn_new_sock(const struct ctx *c, sa_family_t af);
-void tcp_sock_refill_pool(const struct ctx *c, int pool[], int af);
+void tcp_sock_refill_pool(const struct ctx *c, int pool[], sa_family_t af);
 void tcp_splice_refill(const struct ctx *c);
 
 #endif /* TCP_CONN_H */

tcp_splice.c

@@ -399,7 +399,7 @@ static int tcp_splice_new(const struct ctx *c, struct tcp_splice_conn *conn,
 	 */
 	if (pif == PIF_SPLICE) {
 		int *p = CONN_V6(conn) ? init_sock_pool6 : init_sock_pool4;
-		int af = CONN_V6(conn) ? AF_INET6 : AF_INET;
+		sa_family_t af = CONN_V6(conn) ? AF_INET6 : AF_INET;
 
 		s = tcp_conn_pool_sock(p);
 		if (s < 0)

udp.c

@@ -816,7 +816,7 @@ void udp_sock_handler(const struct ctx *c, union epoll_ref ref, uint32_t events,
  * #syscalls sendmmsg
  */
 int udp_tap_handler(struct ctx *c, uint8_t pif,
-		    int af, const void *saddr, const void *daddr,
+		    sa_family_t af, const void *saddr, const void *daddr,
 		    const struct pool *p, int idx, const struct timespec *now)
 {
 	struct mmsghdr mm[UIO_MAXIOV];

udp.h

@@ -11,7 +11,7 @@
 void udp_portmap_clear(void);
 void udp_sock_handler(const struct ctx *c, union epoll_ref ref, uint32_t events,
 		      const struct timespec *now);
-int udp_tap_handler(struct ctx *c, uint8_t pif, int af,
+int udp_tap_handler(struct ctx *c, uint8_t pif, sa_family_t af,
 		    const void *saddr, const void *daddr,
 		    const struct pool *p, int idx, const struct timespec *now);
 int udp_sock_init(const struct ctx *c, int ns, sa_family_t af,

util.c

@@ -97,7 +97,7 @@ found:
  *
  * Return: newly created socket, negative error code on failure
  */
-int sock_l4(const struct ctx *c, int af, uint8_t proto,
+int sock_l4(const struct ctx *c, sa_family_t af, uint8_t proto,
 	    const void *bind_addr, const char *ifname, uint16_t port,
 	    uint32_t data)
 {

util.h

@@ -212,7 +212,7 @@ struct ipv6_opt_hdr {
 __attribute__ ((weak)) int ffsl(long int i) { return __builtin_ffsl(i); }
 char *ipv6_l4hdr(const struct pool *p, int idx, size_t offset, uint8_t *proto,
 		 size_t *dlen);
-int sock_l4(const struct ctx *c, int af, uint8_t proto,
+int sock_l4(const struct ctx *c, sa_family_t af, uint8_t proto,
 	    const void *bind_addr, const char *ifname, uint16_t port,
 	    uint32_t data);
 void sock_probe_mem(struct ctx *c);