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net: Add TCP protocol

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Currently file transfers are done using tftp or NFS both
over udp. This requires a request to be sent from client
(u-boot) to the boot server.

The current standard is TCP with selective acknowledgment.

Signed-off-by: Duncan Hare <DH@Synoia.com>
Signed-off-by: Duncan Hare <DuncanCHare@yahoo.com>
Signed-off-by: Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Cc: Christian Gmeiner <christian.gmeiner@gmail.com>
Cc: Joe Hershberger <joe.hershberger@ni.com>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Ramon Fried <rfried.dev@gmail.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
This commit is contained in:
Ying-Chun Liu (PaulLiu)
2022-11-08 14:17:28 +08:00
committed by Tom Rini
parent 3cdbbe52f7
commit a3bf193bf4
6 changed files with 1092 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

30
net/net.c
View File

@@ -117,6 +117,7 @@
#if defined(CONFIG_CMD_WOL)
#include "wol.h"
#endif
#include <net/tcp.h>
/** BOOTP EXTENTIONS **/
@@ -387,6 +388,8 @@ int net_init(void)
/* Only need to setup buffer pointers once. */
first_call = 0;
if (IS_ENABLED(CONFIG_PROT_TCP))
tcp_set_tcp_state(TCP_CLOSED);
}
return net_init_loop();
@@ -833,6 +836,16 @@ int net_send_udp_packet(uchar *ether, struct in_addr dest, int dport, int sport,
IPPROTO_UDP, 0, 0, 0);
}
#if defined(CONFIG_PROT_TCP)
int net_send_tcp_packet(int payload_len, int dport, int sport, u8 action,
u32 tcp_seq_num, u32 tcp_ack_num)
{
return net_send_ip_packet(net_server_ethaddr, net_server_ip, dport,
sport, payload_len, IPPROTO_TCP, action,
tcp_seq_num, tcp_ack_num);
}
#endif
int net_send_ip_packet(uchar *ether, struct in_addr dest, int dport, int sport,
int payload_len, int proto, u8 action, u32 tcp_seq_num,
u32 tcp_ack_num)
@@ -864,6 +877,14 @@ int net_send_ip_packet(uchar *ether, struct in_addr dest, int dport, int sport,
payload_len);
pkt_hdr_size = eth_hdr_size + IP_UDP_HDR_SIZE;
break;
#if defined(CONFIG_PROT_TCP)
case IPPROTO_TCP:
pkt_hdr_size = eth_hdr_size
+ tcp_set_tcp_header(pkt + eth_hdr_size, dport, sport,
payload_len, action, tcp_seq_num,
tcp_ack_num);
break;
#endif
default:
return -EINVAL;
}
@@ -1289,6 +1310,15 @@ void net_process_received_packet(uchar *in_packet, int len)
if (ip->ip_p == IPPROTO_ICMP) {
receive_icmp(ip, len, src_ip, et);
return;
#if defined(CONFIG_PROT_TCP)
} else if (ip->ip_p == IPPROTO_TCP) {
debug_cond(DEBUG_DEV_PKT,
"TCP PH (to=%pI4, from=%pI4, len=%d)\n",
&dst_ip, &src_ip, len);
rxhand_tcp_f((union tcp_build_pkt *)ip, len);
return;
#endif
} else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
return;
}