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[IPV6]: Support IPV6_{RECV,}TCLASS socket options / ancillary data.

Browse source 
Based on patch from David L Stevens <dlstevens@us.ibm.com>

Signed-off-by: David L Stevens <dlstevens@us.ibm.com>
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
This commit is contained in:
YOSHIFUJI Hideaki 2005-09-08 10:19:03 +09:00
parent 333fad5364
commit 41a1f8ea4f
11 changed files with 104 additions and 24 deletions
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2
include/linux/in6.h
View file

@ -219,9 +219,7 @@ struct in6_flowlabel_req
#define IPV6_DSTOPTS 63
#define IPV6_RECVHOPLIMIT 64
#define IPV6_HOPLIMIT 65
#if 0
#define IPV6_RECVTCLASS 66
#define IPV6_TCLASS 67
#endif
#endif

5
include/linux/ipv6.h
View file

@ -245,7 +245,8 @@ struct ipv6_pinfo {
ohopopts:1,
dstopts:1,
odstopts:1,
rxflow:1;
rxflow:1,
rxtclass:1;
} bits;
__u16 all;
} rxopt;
@ -256,6 +257,7 @@ struct ipv6_pinfo {
sndflow:1,
pmtudisc:2,
ipv6only:1;
__u8 tclass;
__u32 dst_cookie;
@ -269,6 +271,7 @@ struct ipv6_pinfo {
struct ipv6_txoptions *opt;
struct rt6_info *rt;
int hop_limit;
int tclass;
} cork;
};

1
include/net/ipv6.h
View file

@ -377,6 +377,7 @@ extern int ip6_append_data(struct sock *sk,
int length,
int transhdrlen,
int hlimit,
int tclass,
struct ipv6_txoptions *opt,
struct flowi *fl,
struct rt6_info *rt,

2
include/net/transp_v6.h
View file

@ -37,7 +37,7 @@ extern int datagram_recv_ctl(struct sock *sk,
extern int datagram_send_ctl(struct msghdr *msg,
struct flowi *fl,
struct ipv6_txoptions *opt,
int *hlimit);
int *hlimit, int *tclass);
#define LOOPBACK4_IPV6 __constant_htonl(0x7f000006)

25
net/ipv6/datagram.c
View file

@ -390,6 +390,11 @@ int datagram_recv_ctl(struct sock *sk, struct msghdr *msg, struct sk_buff *skb)
put_cmsg(msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim);
}
if (np->rxopt.bits.rxtclass) {
int tclass = (ntohl(*(u32 *)skb->nh.ipv6h) >> 20) & 0xff;
put_cmsg(msg, SOL_IPV6, IPV6_TCLASS, sizeof(tclass), &tclass);
}
if (np->rxopt.bits.rxflow && (*(u32*)skb->nh.raw & IPV6_FLOWINFO_MASK)) {
u32 flowinfo = *(u32*)skb->nh.raw & IPV6_FLOWINFO_MASK;
put_cmsg(msg, SOL_IPV6, IPV6_FLOWINFO, sizeof(flowinfo), &flowinfo);
@ -479,7 +484,7 @@ int datagram_recv_ctl(struct sock *sk, struct msghdr *msg, struct sk_buff *skb)
int datagram_send_ctl(struct msghdr *msg, struct flowi *fl,
struct ipv6_txoptions *opt,
int *hlimit)
int *hlimit, int *tclass)
{
struct in6_pktinfo *src_info;
struct cmsghdr *cmsg;
@ -682,6 +687,24 @@ int datagram_send_ctl(struct msghdr *msg, struct flowi *fl,
*hlimit = *(int *)CMSG_DATA(cmsg);
break;
case IPV6_TCLASS:
{
int tc;
err = -EINVAL;
if (cmsg->cmsg_len != CMSG_LEN(sizeof(int))) {
goto exit_f;
}
tc = *(int *)CMSG_DATA(cmsg);
if (tc < 0 || tc > 0xff)
goto exit_f;
err = 0;
*tclass = tc;
break;
}
default:
LIMIT_NETDEBUG(KERN_DEBUG "invalid cmsg type: %d\n",
cmsg->cmsg_type);

15
net/ipv6/icmp.c
View file

@ -287,7 +287,7 @@ void icmpv6_send(struct sk_buff *skb, int type, int code, __u32 info,
int iif = 0;
int addr_type = 0;
int len;
int hlimit;
int hlimit, tclass;
int err = 0;
if ((u8*)hdr < skb->head || (u8*)(hdr+1) > skb->tail)
@ -385,6 +385,10 @@ void icmpv6_send(struct sk_buff *skb, int type, int code, __u32 info,
if (hlimit < 0)
hlimit = ipv6_get_hoplimit(dst->dev);
tclass = np->cork.tclass;
if (tclass < 0)
tclass = 0;
msg.skb = skb;
msg.offset = skb->nh.raw - skb->data;
@ -400,7 +404,7 @@ void icmpv6_send(struct sk_buff *skb, int type, int code, __u32 info,
err = ip6_append_data(sk, icmpv6_getfrag, &msg,
len + sizeof(struct icmp6hdr),
sizeof(struct icmp6hdr),
hlimit, NULL, &fl, (struct rt6_info*)dst,
hlimit, tclass, NULL, &fl, (struct rt6_info*)dst,
MSG_DONTWAIT);
if (err) {
ip6_flush_pending_frames(sk);
@ -434,6 +438,7 @@ static void icmpv6_echo_reply(struct sk_buff *skb)
struct dst_entry *dst;
int err = 0;
int hlimit;
int tclass;
saddr = &skb->nh.ipv6h->daddr;
@ -475,13 +480,17 @@ static void icmpv6_echo_reply(struct sk_buff *skb)
if (hlimit < 0)
hlimit = ipv6_get_hoplimit(dst->dev);
tclass = np->cork.tclass;
if (tclass < 0)
tclass = 0;
idev = in6_dev_get(skb->dev);
msg.skb = skb;
msg.offset = 0;
err = ip6_append_data(sk, icmpv6_getfrag, &msg, skb->len + sizeof(struct icmp6hdr),
sizeof(struct icmp6hdr), hlimit, NULL, &fl,
sizeof(struct icmp6hdr), hlimit, tclass, NULL, &fl,
(struct rt6_info*)dst, MSG_DONTWAIT);
if (err) {

2
net/ipv6/ip6_flowlabel.c
View file

@ -314,7 +314,7 @@ fl_create(struct in6_flowlabel_req *freq, char __user *optval, int optlen, int *
msg.msg_control = (void*)(fl->opt+1);
flowi.oif = 0;
err = datagram_send_ctl(&msg, &flowi, fl->opt, &junk);
err = datagram_send_ctl(&msg, &flowi, fl->opt, &junk, &junk);
if (err)
goto done;
err = -EINVAL;

24
net/ipv6/ip6_output.c
View file

@ -166,7 +166,7 @@ int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl,
struct ipv6hdr *hdr;
u8 proto = fl->proto;
int seg_len = skb->len;
int hlimit;
int hlimit, tclass;
u32 mtu;
if (opt) {
@ -202,7 +202,6 @@ int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl,
* Fill in the IPv6 header
*/
*(u32*)hdr = htonl(0x60000000) | fl->fl6_flowlabel;
hlimit = -1;
if (np)
hlimit = np->hop_limit;
@ -211,6 +210,14 @@ int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl,
if (hlimit < 0)
hlimit = ipv6_get_hoplimit(dst->dev);
tclass = -1;
if (np)
tclass = np->tclass;
if (tclass < 0)
tclass = 0;
*(u32 *)hdr = htonl(0x60000000 | (tclass << 20)) | fl->fl6_flowlabel;
hdr->payload_len = htons(seg_len);
hdr->nexthdr = proto;
hdr->hop_limit = hlimit;
@ -762,10 +769,11 @@ int ip6_dst_lookup(struct sock *sk, struct dst_entry **dst, struct flowi *fl)
return err;
}
int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb),
void *from, int length, int transhdrlen,
int hlimit, struct ipv6_txoptions *opt, struct flowi *fl, struct rt6_info *rt,
unsigned int flags)
int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to,
int offset, int len, int odd, struct sk_buff *skb),
void *from, int length, int transhdrlen,
int hlimit, int tclass, struct ipv6_txoptions *opt, struct flowi *fl,
struct rt6_info *rt, unsigned int flags)
{
struct inet_sock *inet = inet_sk(sk);
struct ipv6_pinfo *np = inet6_sk(sk);
@ -803,6 +811,7 @@ int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to, int offse
np->cork.rt = rt;
inet->cork.fl = *fl;
np->cork.hop_limit = hlimit;
np->cork.tclass = tclass;
inet->cork.fragsize = mtu = dst_mtu(rt->u.dst.path);
if (dst_allfrag(rt->u.dst.path))
inet->cork.flags |= IPCORK_ALLFRAG;
@ -1084,7 +1093,8 @@ int ip6_push_pending_frames(struct sock *sk)
skb->nh.ipv6h = hdr = (struct ipv6hdr*) skb_push(skb, sizeof(struct ipv6hdr));
*(u32*)hdr = fl->fl6_flowlabel | htonl(0x60000000);
*(u32*)hdr = fl->fl6_flowlabel |
htonl(0x60000000 | ((int)np->cork.tclass << 20));
if (skb->len <= sizeof(struct ipv6hdr) + IPV6_MAXPLEN)
hdr->payload_len = htons(skb->len - sizeof(struct ipv6hdr));

22
net/ipv6/ipv6_sockglue.c
View file

@ -264,6 +264,18 @@ int ipv6_setsockopt(struct sock *sk, int level, int optname,
retv = 0;
break;
case IPV6_TCLASS:
if (val < 0 || val > 0xff)
goto e_inval;
np->tclass = val;
retv = 0;
break;
case IPV6_RECVTCLASS:
np->rxopt.bits.rxtclass = valbool;
retv = 0;
break;
case IPV6_FLOWINFO:
np->rxopt.bits.rxflow = valbool;
retv = 0;
@ -364,7 +376,7 @@ int ipv6_setsockopt(struct sock *sk, int level, int optname,
msg.msg_controllen = optlen;
msg.msg_control = (void*)(opt+1);
retv = datagram_send_ctl(&msg, &fl, opt, &junk);
retv = datagram_send_ctl(&msg, &fl, opt, &junk, &junk);
if (retv)
goto done;
update:
@ -787,6 +799,14 @@ int ipv6_getsockopt(struct sock *sk, int level, int optname,
val = np->rxopt.bits.odstopts;
break;
case IPV6_TCLASS:
val = np->tclass;
break;
case IPV6_RECVTCLASS:
val = np->rxopt.bits.rxtclass;
break;
case IPV6_FLOWINFO:
val = np->rxopt.bits.rxflow;
break;

14
net/ipv6/raw.c
View file

@ -655,6 +655,7 @@ static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
struct flowi fl;
int addr_len = msg->msg_namelen;
int hlimit = -1;
int tclass = -1;
u16 proto;
int err;
@ -740,7 +741,7 @@ static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
memset(opt, 0, sizeof(struct ipv6_txoptions));
opt->tot_len = sizeof(struct ipv6_txoptions);
err = datagram_send_ctl(msg, &fl, opt, &hlimit);
err = datagram_send_ctl(msg, &fl, opt, &hlimit, &tclass);
if (err < 0) {
fl6_sock_release(flowlabel);
return err;
@ -797,6 +798,12 @@ static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
hlimit = ipv6_get_hoplimit(dst->dev);
}
if (tclass < 0) {
tclass = np->cork.tclass;
if (tclass < 0)
tclass = 0;
}
if (msg->msg_flags&MSG_CONFIRM)
goto do_confirm;
@ -805,8 +812,9 @@ static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags);
} else {
lock_sock(sk);
err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov, len, 0,
hlimit, opt, &fl, (struct rt6_info*)dst, msg->msg_flags);
err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov,
len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst,
msg->msg_flags);
if (err)
ip6_flush_pending_frames(sk);

16
net/ipv6/udp.c
View file

@ -637,6 +637,7 @@ static int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk,
int addr_len = msg->msg_namelen;
int ulen = len;
int hlimit = -1;
int tclass = -1;
int corkreq = up->corkflag || msg->msg_flags&MSG_MORE;
int err;
@ -758,7 +759,7 @@ static int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk,
memset(opt, 0, sizeof(struct ipv6_txoptions));
opt->tot_len = sizeof(*opt);
err = datagram_send_ctl(msg, fl, opt, &hlimit);
err = datagram_send_ctl(msg, fl, opt, &hlimit, &tclass);
if (err < 0) {
fl6_sock_release(flowlabel);
return err;
@ -814,6 +815,12 @@ static int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk,
hlimit = ipv6_get_hoplimit(dst->dev);
}
if (tclass < 0) {
tclass = np->tclass;
if (tclass < 0)
tclass = 0;
}
if (msg->msg_flags&MSG_CONFIRM)
goto do_confirm;
back_from_confirm:
@ -833,9 +840,10 @@ static int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk,
do_append_data:
up->len += ulen;
err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov, ulen, sizeof(struct udphdr),
hlimit, opt, fl, (struct rt6_info*)dst,
corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags);
err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov, ulen,
sizeof(struct udphdr), hlimit, tclass, opt, fl,
(struct rt6_info*)dst,
corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags);
if (err)
udp_v6_flush_pending_frames(sk);
else if (!corkreq)