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>

diff --git a/include/uapi/linux/tcp_metrics.h b/include/uapi/linux/tcp_metrics.h
index cb5157b..54a37b1 100644 (file)
--- 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 de32aa4..199659f 100644 (file)
--- 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;