diff options
| author |   Francesco Fusco <ffusco@redhat.com> | 2013-09-24 15:43:09 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2013-09-28 15:21:52 -0700 |
| commit | aa6615814533c634190019ee3a5b10490026d545 (patch) | |
| tree | 08543d020bd7e2500046143440d58cd031f9754c /include | |
| parent | ipv4: IP_TOS and IP_TTL can be specified as ancillary data (diff) | |
| download | linux-dev-aa6615814533c634190019ee3a5b10490026d545.tar.xz linux-dev-aa6615814533c634190019ee3a5b10490026d545.zip | |
ipv4: processing ancillary IP_TOS or IP_TTL
If IP_TOS or IP_TTL are specified as ancillary data, then sendmsg() sends out
packets with the specified TTL or TOS overriding the socket values specified
with the traditional setsockopt().
The struct inet_cork stores the values of TOS, TTL and priority that are
passed through the struct ipcm_cookie. If there are user-specified TOS
(tos != -1) or TTL (ttl != 0) in the struct ipcm_cookie, these values are
used to override the per-socket values. In case of TOS also the priority
is changed accordingly.
Two helper functions get_rttos and get_rtconn_flags are defined to take
into account the presence of a user specified TOS value when computing
RT_TOS and RT_CONN_FLAGS.
Signed-off-by: Francesco Fusco <ffusco@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
| -rw-r--r-- | include/net/inet_sock.h | 3 | ||||
| -rw-r--r-- | include/net/ip.h | 11 | ||||
| -rw-r--r-- | include/net/route.h | 1 |
3 files changed, 15 insertions, 0 deletions
diff --git a/include/net/inet_sock.h b/include/net/inet_sock.h index 636d203727a2..f3141773c14d 100644 --- a/include/net/inet_sock.h +++ b/include/net/inet_sock.h @@ -103,6 +103,9 @@ struct inet_cork { int length; /* Total length of all frames */ struct dst_entry *dst; u8 tx_flags; + __u8 ttl; + __s16 tos; + char priority; }; struct inet_cork_full { diff --git a/include/net/ip.h b/include/net/ip.h index 0135f3823e66..77b4f9b57c28 100644 --- a/include/net/ip.h +++ b/include/net/ip.h @@ -28,6 +28,7 @@ #include <linux/skbuff.h> #include <net/inet_sock.h> +#include <net/route.h> #include <net/snmp.h> #include <net/flow.h> @@ -140,6 +141,16 @@ static inline struct sk_buff *ip_finish_skb(struct sock *sk, struct flowi4 *fl4) return __ip_make_skb(sk, fl4, &sk->sk_write_queue, &inet_sk(sk)->cork.base); } +static inline __u8 get_rttos(struct ipcm_cookie* ipc, struct inet_sock *inet) +{ + return (ipc->tos != -1) ? RT_TOS(ipc->tos) : RT_TOS(inet->tos); +} + +static inline __u8 get_rtconn_flags(struct ipcm_cookie* ipc, struct sock* sk) +{ + return (ipc->tos != -1) ? RT_CONN_FLAGS_TOS(sk, ipc->tos) : RT_CONN_FLAGS(sk); +} + /* datagram.c */ int ip4_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len); diff --git a/include/net/route.h b/include/net/route.h index 6f572ca66d25..0ad8e0102386 100644 --- a/include/net/route.h +++ b/include/net/route.h @@ -39,6 +39,7 @@ #define RTO_ONLINK 0x01 #define RT_CONN_FLAGS(sk) (RT_TOS(inet_sk(sk)->tos) | sock_flag(sk, SOCK_LOCALROUTE)) +#define RT_CONN_FLAGS_TOS(sk,tos) (RT_TOS(tos) | sock_flag(sk, SOCK_LOCALROUTE)) struct fib_nh; struct fib_info; |