[RFC net-next iproute2 2/2] ss: Add inet raw sockets information gathering via netlink diag interface

[Cyrill Gorcunov]

unix, tcp, udp[lite], packet, netlink sockets already support diag
interface for their collection and killing. Now with commit XXX
this facility is implemented for raw sockets.

Signed-off-by: Cyrill Gorcunov <gorcu...@gmail.com>
---
 include/linux/inet_diag.h | 15 +++++++++++++++
 misc/ss.c                 | 20 ++++++++++++++++++--
 2 files changed, 33 insertions(+), 2 deletions(-)

diff --git a/include/linux/inet_diag.h b/include/linux/inet_diag.h
index f5f5c1b..ac66148 100644
--- a/include/linux/inet_diag.h
+++ b/include/linux/inet_diag.h
@@ -43,6 +43,21 @@ struct inet_diag_req_v2 {
        struct inet_diag_sockid id;
 };
 
+/*
+ * An alias for struct inet_diag_req_v2,
+ * @sdiag_raw_protocol member shadows
+ * @pad explicitly, it is done this way
+ * for backward compatibility sake.
+ */
+struct inet_diag_req_raw {
+       __u8    sdiag_family;
+       __u8    sdiag_protocol;
+       __u8    idiag_ext;
+       __u8    sdiag_raw_protocol;
+       __u32   idiag_states;
+       struct inet_diag_sockid id;
+};
+
 enum {
        INET_DIAG_REQ_NONE,
        INET_DIAG_REQ_BYTECODE,
diff --git a/misc/ss.c b/misc/ss.c
index dd77b81..e8c4010 100644
--- a/misc/ss.c
+++ b/misc/ss.c
@@ -724,6 +724,7 @@ struct sockstat {
        struct sockstat    *next;
        unsigned int        type;
        uint16_t            prot;
+       uint16_t            raw_prot;
        inet_prefix         local;
        inet_prefix         remote;
        int                 lport;
@@ -2190,6 +2191,10 @@ static void parse_diag_msg(struct nlmsghdr *nlh, struct 
sockstat *s)
        s->mark = 0;
        if (tb[INET_DIAG_MARK])
                s->mark = *(__u32 *) RTA_DATA(tb[INET_DIAG_MARK]);
+       if (tb[INET_DIAG_PROTOCOL])
+               s->raw_prot = *(__u8 *)RTA_DATA(tb[INET_DIAG_PROTOCOL]);
+       else
+               s->raw_prot = 0;
 
        if (s->local.family == AF_INET)
                s->local.bytelen = s->remote.bytelen = 4;
@@ -2384,7 +2389,7 @@ struct inet_diag_arg {
        struct rtnl_handle *rth;
 };
 
-static int kill_inet_sock(struct nlmsghdr *h, void *arg)
+static int kill_inet_sock(struct nlmsghdr *h, void *arg, struct sockstat *s)
 {
        struct inet_diag_msg *d = NLMSG_DATA(h);
        struct inet_diag_arg *diag_arg = arg;
@@ -2399,6 +2404,13 @@ static int kill_inet_sock(struct nlmsghdr *h, void *arg)
        req.r.sdiag_protocol = diag_arg->protocol;
        req.r.id = d->id;
 
+       if (diag_arg->protocol == IPPROTO_RAW) {
+               struct inet_diag_req_raw *raw = (void *)&req.r;
+
+               BUILD_BUG_ON(sizeof(req.r) != sizeof(*raw));
+               raw->sdiag_raw_protocol = s->raw_prot;
+       }
+
        return rtnl_talk(rth, &req.nlh, NULL, 0);
 }
 
@@ -2418,7 +2430,7 @@ static int show_one_inet_sock(const struct sockaddr_nl 
*addr,
        if (diag_arg->f->f && run_ssfilter(diag_arg->f->f, &s) == 0)
                return 0;
 
-       if (diag_arg->f->kill && kill_inet_sock(h, arg) != 0) {
+       if (diag_arg->f->kill && kill_inet_sock(h, arg, &s) != 0) {
                if (errno == EOPNOTSUPP || errno == ENOENT) {
                        /* Socket can't be closed, or is already closed. */
                        return 0;
@@ -2715,6 +2727,10 @@ static int raw_show(struct filter *f)
 
        dg_proto = RAW_PROTO;
 
+       if (!getenv("PROC_NET_RAW") && !getenv("PROC_ROOT") &&
+           inet_show_netlink(f, NULL, IPPROTO_RAW) == 0)
+               return 0;
+
        if (f->families&(1<<AF_INET)) {
                if ((fp = net_raw_open()) == NULL)
                        goto outerr;
-- 
2.7.4