tcp_hash_insert() takes an address to control which hash bucket the
connection will go into. For IPv6 connections that address is alreadys
stored in struct tcp_conn. For IPv4 connections, an equivalent IPv4-mapped
IPv6 address is stored in struct tcp_conn.
Now that we've made the hashing of IPv4 and IPv4-mapped IPv6 addresses
equivalent, we can simplify tcp_hash_insert() to use the address in
struct tcp_conn, rather than taking it as an extra parameter.
Signed-off-by: David Gibson <david(a)gibson.dropbear.id.au>
---
tcp.c | 15 +++++----------
1 file changed, 5 insertions(+), 10 deletions(-)
diff --git a/tcp.c b/tcp.c
index 4645004..dfa73a3 100644
--- a/tcp.c
+++ b/tcp.c
@@ -1343,15 +1343,12 @@ static unsigned int tcp_hash(const struct ctx *c, int af, const
void *addr,
* tcp_hash_insert() - Insert connection into hash table, chain link
* @c: Execution context
* @conn: Connection pointer
- * @af: Address family, AF_INET or AF_INET6
- * @addr: Remote address, pointer to in_addr or in6_addr
*/
-static void tcp_hash_insert(const struct ctx *c, struct tcp_conn *conn,
- int af, const void *addr)
+static void tcp_hash_insert(const struct ctx *c, struct tcp_conn *conn)
{
int b;
- b = tcp_hash(c, af, addr, conn->tap_port, conn->sock_port);
+ b = tcp_hash(c, AF_INET6, &conn->a.a6, conn->tap_port, conn->sock_port);
conn->next_index = tc_hash[b] ? tc_hash[b] - tc : -1;
tc_hash[b] = conn;
conn->hash_bucket = b;
@@ -2233,7 +2230,7 @@ static void tcp_conn_from_tap(struct ctx *c, int af, const void
*addr,
conn->seq_to_tap = tcp_seq_init(c, af, addr, th->dest, th->source, now);
conn->seq_ack_from_tap = conn->seq_to_tap + 1;
- tcp_hash_insert(c, conn, af, addr);
+ tcp_hash_insert(c, conn);
if (!bind(s, sa, sl)) {
tcp_rst(c, conn); /* Nobody is listening then */
@@ -2891,8 +2888,6 @@ static void tcp_conn_from_sock(struct ctx *c, union epoll_ref ref,
conn->sock_port,
conn->tap_port,
now);
-
- tcp_hash_insert(c, conn, AF_INET6, &sa6.sin6_addr);
} else {
struct sockaddr_in sa4;
@@ -2912,10 +2907,10 @@ static void tcp_conn_from_sock(struct ctx *c, union epoll_ref
ref,
conn->sock_port,
conn->tap_port,
now);
-
- tcp_hash_insert(c, conn, AF_INET, &sa4.sin_addr);
}
+ tcp_hash_insert(c, conn);
+
conn->seq_ack_from_tap = conn->seq_to_tap + 1;
conn->wnd_from_tap = WINDOW_DEFAULT;
--
2.38.1