diff options
author | YOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@linux-ipv6.org> | 2013-01-21 06:48:14 +0000 |
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committer | David S. Miller <davem@davemloft.net> | 2013-01-21 13:33:15 -0500 |
commit | de09334b9326632bbf1a74bfd8b01866cbbf2f61 (patch) | |
tree | fcdf6af7a7d1f529d41dbdd1d785c7f1337b1553 /net/ipv6 | |
parent | 9c86dafe94f03679b77d85915e65da1304005a7c (diff) | |
download | op-kernel-dev-de09334b9326632bbf1a74bfd8b01866cbbf2f61.zip op-kernel-dev-de09334b9326632bbf1a74bfd8b01866cbbf2f61.tar.gz |
ndisc: Introduce ndisc_alloc_skb() helper.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
-rw-r--r-- | net/ipv6/ndisc.c | 52 |
1 files changed, 27 insertions, 25 deletions
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c index 53a545f..1776a0d 100644 --- a/net/ipv6/ndisc.c +++ b/net/ipv6/ndisc.c @@ -366,6 +366,29 @@ static void pndisc_destructor(struct pneigh_entry *n) ipv6_dev_mc_dec(dev, &maddr); } +static struct sk_buff *ndisc_alloc_skb(struct net_device *dev, + int len) +{ + int hlen = LL_RESERVED_SPACE(dev); + int tlen = dev->needed_tailroom; + struct sock *sk = dev_net(dev)->ipv6.ndisc_sk; + struct sk_buff *skb; + int err; + + skb = sock_alloc_send_skb(sk, + hlen + sizeof(struct ipv6hdr) + len + tlen, + 1, &err); + if (!skb) { + ND_PRINTK(0, err, "ndisc: %s failed to allocate an skb, err=%d\n", + __func__, err); + return NULL; + } + + skb_reserve(skb, hlen); + + return skb; +} + static struct sk_buff *ndisc_build_skb(struct net_device *dev, const struct in6_addr *daddr, const struct in6_addr *saddr, @@ -377,10 +400,7 @@ static struct sk_buff *ndisc_build_skb(struct net_device *dev, struct sock *sk = net->ipv6.ndisc_sk; struct sk_buff *skb; struct icmp6hdr *hdr; - int hlen = LL_RESERVED_SPACE(dev); - int tlen = dev->needed_tailroom; int len; - int err; u8 *opt; if (!dev->addr_len) @@ -390,17 +410,10 @@ static struct sk_buff *ndisc_build_skb(struct net_device *dev, if (llinfo) len += ndisc_opt_addr_space(dev); - skb = sock_alloc_send_skb(sk, - (sizeof(struct ipv6hdr) + - len + hlen + tlen), - 1, &err); - if (!skb) { - ND_PRINTK(0, err, "ND: %s failed to allocate an skb, err=%d\n", - __func__, err); + skb = ndisc_alloc_skb(dev, len); + if (!skb) return NULL; - } - skb_reserve(skb, hlen); ip6_nd_hdr(sk, skb, dev, saddr, daddr, IPPROTO_ICMPV6, len); skb->transport_header = skb->tail; @@ -1369,7 +1382,6 @@ void ndisc_send_redirect(struct sk_buff *skb, const struct in6_addr *target) struct inet6_dev *idev; struct flowi6 fl6; u8 *opt; - int hlen, tlen; int rd_len; int err; u8 ha_buf[MAX_ADDR_LEN], *ha = NULL; @@ -1439,20 +1451,10 @@ void ndisc_send_redirect(struct sk_buff *skb, const struct in6_addr *target) rd_len &= ~0x7; len += rd_len; - hlen = LL_RESERVED_SPACE(dev); - tlen = dev->needed_tailroom; - buff = sock_alloc_send_skb(sk, - (sizeof(struct ipv6hdr) + - len + hlen + tlen), - 1, &err); - if (buff == NULL) { - ND_PRINTK(0, err, - "Redirect: %s failed to allocate an skb, err=%d\n", - __func__, err); + buff = ndisc_alloc_skb(dev, len); + if (!buff) goto release; - } - skb_reserve(buff, hlen); ip6_nd_hdr(sk, buff, dev, &saddr_buf, &ipv6_hdr(skb)->saddr, IPPROTO_ICMPV6, len); |