From 06bd12bd8e48182f7f3293bbec187b4e90da796f Mon Sep 17 00:00:00 2001
From: Andrea Claudi <aclaudi@redhat.com>
Date: Mon, 29 Jun 2020 14:36:51 +0200
Subject: [PATCH] ss: allow dumping kTLS info
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1812207
Upstream Status: iproute2.git commit 14cadc707b919
Conflicts: due to out-of-order cherry-pick of commit
712fdd98c0839 ("ss: allow dumping MPTCP subflow information")
commit 14cadc707b919914e9a2d5dffad9232c3ae97c5f
Author: Davide Caratti <dcaratti@redhat.com>
Date: Mon Oct 7 12:16:44 2019 +0200
ss: allow dumping kTLS info
now that INET_DIAG_INFO requests can dump TCP ULP information, extend 'ss'
to allow diagnosing kTLS when it is attached to a TCP socket. While at it,
import kTLS uAPI definitions from the latest net-next tree.
CC: Andrea Claudi <aclaudi@redhat.com>
Co-developed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
---
misc/ss.c | 82 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 82 insertions(+)
diff --git a/misc/ss.c b/misc/ss.c
index 3d565af86087c..8285382bd6c4a 100644
--- a/misc/ss.c
+++ b/misc/ss.c
@@ -51,6 +51,7 @@
#include <linux/tipc.h>
#include <linux/tipc_netlink.h>
#include <linux/tipc_sockets_diag.h>
+#include <linux/tls.h>
#include <linux/mptcp.h>
/* AF_VSOCK/PF_VSOCK is only provided since glibc 2.18 */
@@ -2752,6 +2753,72 @@ static void print_md5sig(struct tcp_diag_md5sig *sig)
print_escape_buf(sig->tcpm_key, sig->tcpm_keylen, " ,");
}
+static void tcp_tls_version(struct rtattr *attr)
+{
+ u_int16_t val;
+
+ if (!attr)
+ return;
+ val = rta_getattr_u16(attr);
+
+ switch (val) {
+ case TLS_1_2_VERSION:
+ out(" version: 1.2");
+ break;
+ case TLS_1_3_VERSION:
+ out(" version: 1.3");
+ break;
+ default:
+ out(" version: unknown(%hu)", val);
+ break;
+ }
+}
+
+static void tcp_tls_cipher(struct rtattr *attr)
+{
+ u_int16_t val;
+
+ if (!attr)
+ return;
+ val = rta_getattr_u16(attr);
+
+ switch (val) {
+ case TLS_CIPHER_AES_GCM_128:
+ out(" cipher: aes-gcm-128");
+ break;
+ case TLS_CIPHER_AES_GCM_256:
+ out(" cipher: aes-gcm-256");
+ break;
+ }
+}
+
+static void tcp_tls_conf(const char *name, struct rtattr *attr)
+{
+ u_int16_t val;
+
+ if (!attr)
+ return;
+ val = rta_getattr_u16(attr);
+
+ switch (val) {
+ case TLS_CONF_BASE:
+ out(" %s: none", name);
+ break;
+ case TLS_CONF_SW:
+ out(" %s: sw", name);
+ break;
+ case TLS_CONF_HW:
+ out(" %s: hw", name);
+ break;
+ case TLS_CONF_HW_RECORD:
+ out(" %s: hw-record", name);
+ break;
+ default:
+ out(" %s: unknown(%hu)", name, val);
+ break;
+ }
+}
+
static void mptcp_subflow_info(struct rtattr *tb[])
{
u_int32_t flags = 0;
@@ -2966,6 +3033,21 @@ static void tcp_show_info(const struct nlmsghdr *nlh, struct inet_diag_msg *r,
parse_rtattr_nested(ulpinfo, INET_ULP_INFO_MAX,
tb[INET_DIAG_ULP_INFO]);
+ if (ulpinfo[INET_ULP_INFO_NAME])
+ out(" tcp-ulp-%s",
+ rta_getattr_str(ulpinfo[INET_ULP_INFO_NAME]));
+
+ if (ulpinfo[INET_ULP_INFO_TLS]) {
+ struct rtattr *tlsinfo[TLS_INFO_MAX + 1] = { 0 };
+
+ parse_rtattr_nested(tlsinfo, TLS_INFO_MAX,
+ ulpinfo[INET_ULP_INFO_TLS]);
+
+ tcp_tls_version(tlsinfo[TLS_INFO_VERSION]);
+ tcp_tls_cipher(tlsinfo[TLS_INFO_CIPHER]);
+ tcp_tls_conf("rxconf", tlsinfo[TLS_INFO_RXCONF]);
+ tcp_tls_conf("txconf", tlsinfo[TLS_INFO_TXCONF]);
+ }
if (ulpinfo[INET_ULP_INFO_MPTCP]) {
struct rtattr *sfinfo[MPTCP_SUBFLOW_ATTR_MAX + 1] =
{ 0 };
--
2.26.2