tcp: metrics: New netlink attribute for src IP and dumped in netlink reply

This patch adds a new netlink attribute for the source-IP and appends it
to the netlink reply. Now, iproute2 can have access to the source-IP.

Signed-off-by: Christoph Paasch <christoph.paasch@uclouvain.be>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 8 insertions, 0 deletions

diff --git a/include/uapi/linux/tcp_metrics.h b/include/uapi/linux/tcp_metrics.h
index cb5157b55f32..54a37b13f2c4 100644
--- a/include/uapi/linux/tcp_metrics.h
+++ b/include/uapi/linux/tcp_metrics.h
@@ -35,6 +35,8 @@ enum {
         TCP_METRICS_ATTR_FOPEN_SYN_DROPS,       /* u16, count of drops */
         TCP_METRICS_ATTR_FOPEN_SYN_DROP_TS,     /* msecs age */
         TCP_METRICS_ATTR_FOPEN_COOKIE,          /* binary */
+        TCP_METRICS_ATTR_SADDR_IPV4,            /* u32 */
+        TCP_METRICS_ATTR_SADDR_IPV6,            /* binary */
 
         __TCP_METRICS_ATTR_MAX,
 };
diff --git a/net/ipv4/tcp_metrics.c b/net/ipv4/tcp_metrics.c
index de32aa41a846..199659f7a871 100644
--- a/net/ipv4/tcp_metrics.c
+++ b/net/ipv4/tcp_metrics.c
@@ -745,11 +745,17 @@ static int tcp_metrics_fill_info(struct sk_buff *msg,
                 if (nla_put_be32(msg, TCP_METRICS_ATTR_ADDR_IPV4,
                                 tm->tcpm_daddr.addr.a4) < 0)
                         goto nla_put_failure;
+                if (nla_put_be32(msg, TCP_METRICS_ATTR_SADDR_IPV4,
+                                tm->tcpm_saddr.addr.a4) < 0)
+                        goto nla_put_failure;
                 break;
         case AF_INET6:
                 if (nla_put(msg, TCP_METRICS_ATTR_ADDR_IPV6, 16,
                             tm->tcpm_daddr.addr.a6) < 0)
                         goto nla_put_failure;
+                if (nla_put(msg, TCP_METRICS_ATTR_SADDR_IPV6, 16,
+                            tm->tcpm_saddr.addr.a6) < 0)
+                        goto nla_put_failure;
                 break;
         default:
                 return -EAFNOSUPPORT;