diff options
Diffstat (limited to 'net/ipv4/ip_sockglue.c')
| -rw-r--r-- | net/ipv4/ip_sockglue.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c index b8a2d63d1fb8..ecbaae200131 100644 --- a/net/ipv4/ip_sockglue.c +++ b/net/ipv4/ip_sockglue.c @@ -97,6 +97,17 @@ static void ip_cmsg_recv_retopts(struct msghdr *msg, struct sk_buff *skb) put_cmsg(msg, SOL_IP, IP_RETOPTS, opt->optlen, opt->__data); } +static void ip_cmsg_recv_fragsize(struct msghdr *msg, struct sk_buff *skb) +{ + int val; + + if (IPCB(skb)->frag_max_size == 0) + return; + + val = IPCB(skb)->frag_max_size; + put_cmsg(msg, SOL_IP, IP_RECVFRAGSIZE, sizeof(val), &val); +} + static void ip_cmsg_recv_checksum(struct msghdr *msg, struct sk_buff *skb, int tlen, int offset) { @@ -218,6 +229,9 @@ void ip_cmsg_recv_offset(struct msghdr *msg, struct sk_buff *skb, if (flags & IP_CMSG_CHECKSUM) ip_cmsg_recv_checksum(msg, skb, tlen, offset); + + if (flags & IP_CMSG_RECVFRAGSIZE) + ip_cmsg_recv_fragsize(msg, skb); } EXPORT_SYMBOL(ip_cmsg_recv_offset); @@ -614,6 +628,7 @@ static int do_ip_setsockopt(struct sock *sk, int level, case IP_MULTICAST_LOOP: case IP_RECVORIGDSTADDR: case IP_CHECKSUM: + case IP_RECVFRAGSIZE: if (optlen >= sizeof(int)) { if (get_user(val, (int __user *) optval)) return -EFAULT; @@ -726,6 +741,14 @@ static int do_ip_setsockopt(struct sock *sk, int level, } } break; + case IP_RECVFRAGSIZE: + if (sk->sk_type != SOCK_RAW && sk->sk_type != SOCK_DGRAM) + goto e_inval; + if (val) + inet->cmsg_flags |= IP_CMSG_RECVFRAGSIZE; + else + inet->cmsg_flags &= ~IP_CMSG_RECVFRAGSIZE; + break; case IP_TOS: /* This sets both TOS and Precedence */ if (sk->sk_type == SOCK_STREAM) { val &= ~INET_ECN_MASK; @@ -1357,6 +1380,9 @@ static int do_ip_getsockopt(struct sock *sk, int level, int optname, case IP_CHECKSUM: val = (inet->cmsg_flags & IP_CMSG_CHECKSUM) != 0; break; + case IP_RECVFRAGSIZE: + val = (inet->cmsg_flags & IP_CMSG_RECVFRAGSIZE) != 0; + break; case IP_TOS: val = inet->tos; break; |