[PATCH v5 net-next] l2tp: Refactor the codes with existing macros instead of literal number
From: <hidden>
Date: 2016-08-22 14:51:00
From: Gao Feng <redacted> Use PPP_ALLSTATIONS, PPP_UI, and SEND_SHUTDOWN instead of 0xff, 0x03, and 2 separately. Signed-off-by: Gao Feng <redacted> --- v5: Remove tail space; v4: Remove two static ppph variables; v3: Modify the subject; v2: Only replace the literal number with macros according to Guillaume's advice v1: Inital patch net/l2tp/l2tp_ppp.c | 20 +++++++++----------- 1 file changed, 9 insertions(+), 11 deletions(-)
diff --git a/net/l2tp/l2tp_ppp.c b/net/l2tp/l2tp_ppp.c
index d9560aa..0c071c4 100644
--- a/net/l2tp/l2tp_ppp.c
+++ b/net/l2tp/l2tp_ppp.c@@ -177,7 +177,7 @@ static int pppol2tp_recv_payload_hook(struct sk_buff *skb) if (!pskb_may_pull(skb, 2)) return 1; - if ((skb->data[0] == 0xff) && (skb->data[1] == 0x03)) + if ((skb->data[0] == PPP_ALLSTATIONS) && (skb->data[1] == PPP_UI)) skb_pull(skb, 2); return 0;
@@ -282,7 +282,6 @@ static void pppol2tp_session_sock_put(struct l2tp_session *session) static int pppol2tp_sendmsg(struct socket *sock, struct msghdr *m, size_t total_len) { - static const unsigned char ppph[2] = { 0xff, 0x03 }; struct sock *sk = sock->sk; struct sk_buff *skb; int error;
@@ -312,7 +311,7 @@ static int pppol2tp_sendmsg(struct socket *sock, struct msghdr *m, error = -ENOMEM; skb = sock_wmalloc(sk, NET_SKB_PAD + sizeof(struct iphdr) + uhlen + session->hdr_len + - sizeof(ppph) + total_len, + 2 + total_len, /* 2 bytes for PPP_ALLSTATIONS & PPP_UI */ 0, GFP_KERNEL); if (!skb) goto error_put_sess_tun;
@@ -325,8 +324,8 @@ static int pppol2tp_sendmsg(struct socket *sock, struct msghdr *m, skb_reserve(skb, uhlen); /* Add PPP header */ - skb->data[0] = ppph[0]; - skb->data[1] = ppph[1]; + skb->data[0] = PPP_ALLSTATIONS; + skb->data[1] = PPP_UI; skb_put(skb, 2); /* Copy user data into skb */
@@ -369,7 +368,6 @@ error: */ static int pppol2tp_xmit(struct ppp_channel *chan, struct sk_buff *skb) { - static const u8 ppph[2] = { 0xff, 0x03 }; struct sock *sk = (struct sock *) chan->private; struct sock *sk_tun; struct l2tp_session *session;
@@ -398,14 +396,14 @@ static int pppol2tp_xmit(struct ppp_channel *chan, struct sk_buff *skb) sizeof(struct iphdr) + /* IP header */ uhlen + /* UDP header (if L2TP_ENCAPTYPE_UDP) */ session->hdr_len + /* L2TP header */ - sizeof(ppph); /* PPP header */ + 2; /* 2 bytes for PPP_ALLSTATIONS & PPP_UI */ if (skb_cow_head(skb, headroom)) goto abort_put_sess_tun; /* Setup PPP header */ - __skb_push(skb, sizeof(ppph)); - skb->data[0] = ppph[0]; - skb->data[1] = ppph[1]; + __skb_push(skb, 2); + skb->data[0] = PPP_ALLSTATIONS; + skb->data[1] = PPP_UI; local_bh_disable(); l2tp_xmit_skb(session, skb, session->hdr_len);
@@ -440,7 +438,7 @@ static void pppol2tp_session_close(struct l2tp_session *session) BUG_ON(session->magic != L2TP_SESSION_MAGIC); if (sock) { - inet_shutdown(sock, 2); + inet_shutdown(sock, SEND_SHUTDOWN); /* Don't let the session go away before our socket does */ l2tp_session_inc_refcount(session); }
--
1.9.1