diff options
| author | Gao Feng <fgao@ikuai8.com> | 2016-08-12 19:30:48 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-08-15 20:55:53 +0300 |
| commit | 03459345bc00da70a35fa39bcfcf13d779097074 (patch) | |
| tree | c9db9f4cd4b85de2e4df5008d2decfd96c568ca4 /drivers/net/ppp | |
| parent | cfad65c7fa9e77c27025eb5c2098cfbd4d445eab (diff) | |
| download | linux-03459345bc00da70a35fa39bcfcf13d779097074.tar.xz | |
pptp: Refactor the struct and macros of PPTP codes
1. Use struct gre_base_hdr directly in pptp_gre_header instead of
duplicated members;
2. Use existing macros like GRE_KEY, GRE_SEQ, and so on instead of
duplicated macros defined by PPTP;
3. Add new macros like GRE_IS_ACK/SEQ and so on instead of
PPTP_GRE_IS_A/S and so on;
Signed-off-by: Gao Feng <fgao@ikuai8.com>
Reviewed-by: Philip Prindeville <philipp@redfish-solutions.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ppp')
| -rw-r--r-- | drivers/net/ppp/pptp.c | 28 |
1 files changed, 13 insertions, 15 deletions
diff --git a/drivers/net/ppp/pptp.c b/drivers/net/ppp/pptp.c index 3e68dbc0af7f..1951b1085cb8 100644 --- a/drivers/net/ppp/pptp.c +++ b/drivers/net/ppp/pptp.c @@ -206,16 +206,14 @@ static int pptp_xmit(struct ppp_channel *chan, struct sk_buff *skb) skb_push(skb, header_len); hdr = (struct pptp_gre_header *)(skb->data); - hdr->flags = PPTP_GRE_FLAG_K; - hdr->ver = PPTP_GRE_VER; - hdr->protocol = htons(PPTP_GRE_PROTO); - hdr->call_id = htons(opt->dst_addr.call_id); + hdr->gre_hd.flags = GRE_KEY | GRE_VERSION_1 | GRE_SEQ; + hdr->gre_hd.protocol = GRE_PROTO_PPP; + hdr->call_id = htons(opt->dst_addr.call_id); - hdr->flags |= PPTP_GRE_FLAG_S; - hdr->seq = htonl(++opt->seq_sent); + hdr->seq = htonl(++opt->seq_sent); if (opt->ack_sent != seq_recv) { /* send ack with this message */ - hdr->ver |= PPTP_GRE_FLAG_A; + hdr->gre_hd.flags |= GRE_ACK; hdr->ack = htonl(seq_recv); opt->ack_sent = seq_recv; } @@ -278,7 +276,7 @@ static int pptp_rcv_core(struct sock *sk, struct sk_buff *skb) headersize = sizeof(*header); /* test if acknowledgement present */ - if (PPTP_GRE_IS_A(header->ver)) { + if (GRE_IS_ACK(header->gre_hd.flags)) { __u32 ack; if (!pskb_may_pull(skb, headersize)) @@ -286,7 +284,7 @@ static int pptp_rcv_core(struct sock *sk, struct sk_buff *skb) header = (struct pptp_gre_header *)(skb->data); /* ack in different place if S = 0 */ - ack = PPTP_GRE_IS_S(header->flags) ? header->ack : header->seq; + ack = GRE_IS_SEQ(header->gre_hd.flags) ? header->ack : header->seq; ack = ntohl(ack); @@ -299,7 +297,7 @@ static int pptp_rcv_core(struct sock *sk, struct sk_buff *skb) headersize -= sizeof(header->ack); } /* test if payload present */ - if (!PPTP_GRE_IS_S(header->flags)) + if (!GRE_IS_SEQ(header->gre_hd.flags)) goto drop; payload_len = ntohs(header->payload_len); @@ -360,11 +358,11 @@ static int pptp_rcv(struct sk_buff *skb) header = (struct pptp_gre_header *)skb->data; - if (ntohs(header->protocol) != PPTP_GRE_PROTO || /* PPTP-GRE protocol for PPTP */ - PPTP_GRE_IS_C(header->flags) || /* flag C should be clear */ - PPTP_GRE_IS_R(header->flags) || /* flag R should be clear */ - !PPTP_GRE_IS_K(header->flags) || /* flag K should be set */ - (header->flags&0xF) != 0) /* routing and recursion ctrl = 0 */ + if (header->gre_hd.protocol != GRE_PROTO_PPP || /* PPTP-GRE protocol for PPTP */ + GRE_IS_CSUM(header->gre_hd.flags) || /* flag CSUM should be clear */ + GRE_IS_ROUTING(header->gre_hd.flags) || /* flag ROUTING should be clear */ + !GRE_IS_KEY(header->gre_hd.flags) || /* flag KEY should be set */ + (header->gre_hd.flags & GRE_FLAGS)) /* flag Recursion Ctrl should be clear */ /* if invalid, discard this packet */ goto drop; |