[PATCH 05/12] net/tcp: rename ack_edge and seq_init to more common rcv_nxt and irs

[Mikhail Kshevetskiy]

Use the names from RFC 9293

Signed-off-by: Mikhail Kshevetskiy <mikhail.kshevetskiy at iopsys.eu>
---
 include/net/tcp.h |  8 ++++----
 net/tcp.c         | 32 ++++++++++++++++----------------
 2 files changed, 20 insertions(+), 20 deletions(-)

diff --git a/include/net/tcp.h b/include/net/tcp.h
index f224d0cae2f..0694af9d5b1 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -285,8 +285,8 @@ enum tcp_state {
  *
  * @state:		TCP connection state
  *
- * @seq_init:		Initial receive sequence number
- * @ack_edge:		Receive next
+ * @irs:		Initial receive sequence number
+ * @rcv_nxt:		Receive next
  *
  * @loc_timestamp:	Local timestamp
  * @rmt_timestamp:	Remote timestamp
@@ -301,8 +301,8 @@ struct tcp_stream {
 	/* TCP connection state */
 	enum tcp_state	state;
 
-	u32		seq_init;
-	u32		ack_edge;
+	u32		irs;
+	u32		rcv_nxt;
 
 	/* TCP option timestamp */
 	u32		loc_timestamp;
diff --git a/net/tcp.c b/net/tcp.c
index efa12c9e8d3..2a0dcc4e771 100644
--- a/net/tcp.c
+++ b/net/tcp.c
@@ -361,9 +361,9 @@ int tcp_set_tcp_header(struct tcp_stream *tcp, uchar *pkt, int payload_len,
 	pkt_len	= pkt_hdr_len + payload_len;
 	tcp_len	= pkt_len - IP_HDR_SIZE;
 
-	tcp->ack_edge = tcp_ack_num;
+	tcp->rcv_nxt = tcp_ack_num;
 	/* TCP Header */
-	b->ip.hdr.tcp_ack = htonl(tcp->ack_edge);
+	b->ip.hdr.tcp_ack = htonl(tcp->rcv_nxt);
 	b->ip.hdr.tcp_src = htons(tcp->lport);
 	b->ip.hdr.tcp_dst = htons(tcp->rport);
 	b->ip.hdr.tcp_seq = htonl(tcp_seq_num);
@@ -397,10 +397,10 @@ int tcp_set_tcp_header(struct tcp_stream *tcp, uchar *pkt, int payload_len,
 	return pkt_hdr_len;
 }
 
-static void tcp_update_ack_edge(struct tcp_stream *tcp)
+static void tcp_update_rcv_nxt(struct tcp_stream *tcp)
 {
-	if (tcp_seq_cmp(tcp->ack_edge, tcp->lost.hill[0].l) >= 0) {
-		tcp->ack_edge = tcp->lost.hill[0].r;
+	if (tcp_seq_cmp(tcp->rcv_nxt, tcp->lost.hill[0].l) >= 0) {
+		tcp->rcv_nxt = tcp->lost.hill[0].r;
 
 		memmove(&tcp->lost.hill[0], &tcp->lost.hill[1],
 			(TCP_SACK_HILLS - 1) * sizeof(struct sack_edges));
@@ -435,7 +435,7 @@ void tcp_hole(struct tcp_stream *tcp, u32 tcp_seq_num, u32 len)
 			tcp_seq_num = tcp->lost.hill[i].l;
 		}
 		if (tcp_seq_cmp(tcp->lost.hill[i].r, tcp_seq_num + len) >= 0) {
-			tcp_update_ack_edge(tcp);
+			tcp_update_rcv_nxt(tcp);
 			return;
 		}
 
@@ -464,12 +464,12 @@ void tcp_hole(struct tcp_stream *tcp, u32 tcp_seq_num, u32 len)
 			}
 		}
 
-		tcp_update_ack_edge(tcp);
+		tcp_update_rcv_nxt(tcp);
 		return;
 	}
 
 	if (i == TCP_SACK_HILLS) {
-		tcp_update_ack_edge(tcp);
+		tcp_update_rcv_nxt(tcp);
 		return;
 	}
 
@@ -490,7 +490,7 @@ void tcp_hole(struct tcp_stream *tcp, u32 tcp_seq_num, u32 len)
 	tcp->lost.hill[i].r = tcp_seq_num + len;
 	tcp->lost.len = TCP_OPT_LEN_2 + cnt * TCP_OPT_LEN_8;
 
-	tcp_update_ack_edge(tcp);
+	tcp_update_rcv_nxt(tcp);
 };
 
 /**
@@ -567,8 +567,8 @@ static u8 tcp_state_machine(struct tcp_stream *tcp, u8 tcp_flags,
 		debug_cond(DEBUG_INT_STATE, "TCP CLOSED %x\n", tcp_flags);
 		if (tcp_syn) {
 			action = TCP_SYN | TCP_ACK;
-			tcp->seq_init = tcp_seq_num;
-			tcp->ack_edge = tcp_seq_num + 1;
+			tcp->irs = tcp_seq_num;
+			tcp->rcv_nxt = tcp_seq_num + 1;
 			tcp->lost.len = TCP_OPT_LEN_2;
 			tcp->state = TCP_SYN_RECEIVED;
 		} else if (tcp_ack || tcp_fin) {
@@ -584,8 +584,8 @@ static u8 tcp_state_machine(struct tcp_stream *tcp, u8 tcp_flags,
 			tcp->state = TCP_CLOSE_WAIT;
 		} else if (tcp_ack || (tcp_syn && tcp_ack)) {
 			action |= TCP_ACK;
-			tcp->seq_init = tcp_seq_num;
-			tcp->ack_edge = tcp_seq_num + 1;
+			tcp->irs = tcp_seq_num;
+			tcp->rcv_nxt = tcp_seq_num + 1;
 			tcp->state = TCP_ESTABLISHED;
 
 			if (tcp_syn && tcp_ack)
@@ -634,7 +634,7 @@ static u8 tcp_state_machine(struct tcp_stream *tcp, u8 tcp_flags,
 	case TCP_FIN_WAIT_1:
 		debug_cond(DEBUG_INT_STATE, "TCP_FIN_WAIT_1 (%x)\n", tcp_flags);
 		if (tcp_fin) {
-			tcp->ack_edge++;
+			tcp->rcv_nxt++;
 			action = TCP_ACK | TCP_FIN;
 			tcp->state = TCP_FIN_WAIT_2;
 		}
@@ -749,7 +749,7 @@ void rxhand_tcp_f(union tcp_build_pkt *b, unsigned int pkt_len)
 	} else if (tcp_action != TCP_DATA) {
 		debug_cond(DEBUG_DEV_PKT,
 			   "TCP Action (action=%x,Seq=%u,Ack=%u,Pay=%d)\n",
-			   tcp_action, tcp_ack_num, tcp->ack_edge, payload_len);
+			   tcp_action, tcp_ack_num, tcp->rcv_nxt, payload_len);
 
 		/*
 		 * Warning: Incoming Ack & Seq sequence numbers are transposed
@@ -757,7 +757,7 @@ void rxhand_tcp_f(union tcp_build_pkt *b, unsigned int pkt_len)
 		 */
 		net_send_tcp_packet(0, tcp->rhost, tcp->rport, tcp->lport,
 				    (tcp_action & (~TCP_PUSH)),
-				    tcp_ack_num, tcp->ack_edge);
+				    tcp_ack_num, tcp->rcv_nxt);
 	}
 }
 
-- 
2.43.0