static void raw_v4_hash(struct sock *sk)
{
struct hlist_head *head = &raw_v4_htable[inet_sk(sk)->num &
(RAWV4_HTABLE_SIZE - 1)];
write_lock_bh(&raw_v4_lock);
sk_add_node(sk, head);
sock_prot_inc_use(sk->sk_prot);
write_unlock_bh(&raw_v4_lock);
}
void raw_hash_sk(struct sock *sk, struct raw_hashinfo *h)
{
struct hlist_head *head;
head = &h->ht[inet_sk(sk)->num & (RAW_HTABLE_SIZE - 1)];
write_lock_bh(&h->lock);
sk_add_node(sk, head);
sock_prot_inc_use(sk->sk_prot);
write_unlock_bh(&h->lock);
}
static void raw_v6_hash(struct sock *sk)
{
struct sock **skp = &raw_v6_htable[sk->num & (RAWV6_HTABLE_SIZE - 1)];
write_lock_bh(&raw_v6_lock);
if ((sk->next = *skp) != NULL)
(*skp)->pprev = &sk->next;
*skp = sk;
sk->pprev = skp;
sock_prot_inc_use(sk->prot);
sock_hold(sk);
write_unlock_bh(&raw_v6_lock);
}
int ipv6_setsockopt(struct sock *sk, int level, int optname,
char __user *optval, int optlen)
{
struct ipv6_pinfo *np = inet6_sk(sk);
int val, valbool;
int retv = -ENOPROTOOPT;
if (level == SOL_IP && sk->sk_type != SOCK_RAW)
return udp_prot.setsockopt(sk, level, optname, optval, optlen);
if(level!=SOL_IPV6)
goto out;
if (optval == NULL)
val=0;
else if (get_user(val, (int __user *) optval))
return -EFAULT;
valbool = (val!=0);
lock_sock(sk);
switch (optname) {
case IPV6_ADDRFORM:
if (val == PF_INET) {
struct ipv6_txoptions *opt;
struct sk_buff *pktopt;
if (sk->sk_protocol != IPPROTO_UDP &&
sk->sk_protocol != IPPROTO_TCP)
break;
if (sk->sk_state != TCP_ESTABLISHED) {
retv = -ENOTCONN;
break;
}
if (ipv6_only_sock(sk) ||
!(ipv6_addr_type(&np->daddr) & IPV6_ADDR_MAPPED)) {
retv = -EADDRNOTAVAIL;
break;
}
fl6_free_socklist(sk);
ipv6_sock_mc_close(sk);
if (sk->sk_protocol == IPPROTO_TCP) {
struct tcp_sock *tp = tcp_sk(sk);
local_bh_disable();
sock_prot_dec_use(sk->sk_prot);
sock_prot_inc_use(&tcp_prot);
local_bh_enable();
sk->sk_prot = &tcp_prot;
tp->af_specific = &ipv4_specific;
sk->sk_socket->ops = &inet_stream_ops;
sk->sk_family = PF_INET;
tcp_sync_mss(sk, tp->pmtu_cookie);
} else {
local_bh_disable();
sock_prot_dec_use(sk->sk_prot);
sock_prot_inc_use(&udp_prot);
local_bh_enable();
sk->sk_prot = &udp_prot;
sk->sk_socket->ops = &inet_dgram_ops;
sk->sk_family = PF_INET;
}
opt = xchg(&np->opt, NULL);
if (opt)
sock_kfree_s(sk, opt, opt->tot_len);
pktopt = xchg(&np->pktoptions, NULL);
if (pktopt)
kfree_skb(pktopt);
sk->sk_destruct = inet_sock_destruct;
#ifdef INET_REFCNT_DEBUG
atomic_dec(&inet6_sock_nr);
#endif
module_put(THIS_MODULE);
retv = 0;
break;
}
goto e_inval;
case IPV6_V6ONLY:
if (inet_sk(sk)->num)
goto e_inval;
np->ipv6only = valbool;
retv = 0;
break;
case IPV6_PKTINFO:
np->rxopt.bits.rxinfo = valbool;
retv = 0;
break;
case IPV6_HOPLIMIT:
np->rxopt.bits.rxhlim = valbool;
retv = 0;
break;
case IPV6_RTHDR:
if (val < 0 || val > 2)
goto e_inval;
np->rxopt.bits.srcrt = val;
retv = 0;
break;
case IPV6_HOPOPTS:
np->rxopt.bits.hopopts = valbool;
retv = 0;
break;
case IPV6_DSTOPTS:
np->rxopt.bits.dstopts = valbool;
retv = 0;
break;
case IPV6_FLOWINFO:
np->rxopt.bits.rxflow = valbool;
retv = 0;
break;
case IPV6_PKTOPTIONS:
{
struct ipv6_txoptions *opt = NULL;
struct msghdr msg;
struct flowi fl;
int junk;
fl.fl6_flowlabel = 0;
fl.oif = sk->sk_bound_dev_if;
if (optlen == 0)
goto update;
/* 1K is probably excessive
* 1K is surely not enough, 2K per standard header is 16K.
*/
retv = -EINVAL;
if (optlen > 64*1024)
break;
opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL);
retv = -ENOBUFS;
if (opt == NULL)
break;
memset(opt, 0, sizeof(*opt));
opt->tot_len = sizeof(*opt) + optlen;
retv = -EFAULT;
if (copy_from_user(opt+1, optval, optlen))
goto done;
msg.msg_controllen = optlen;
msg.msg_control = (void*)(opt+1);
retv = datagram_send_ctl(&msg, &fl, opt, &junk);
if (retv)
goto done;
update:
retv = 0;
if (sk->sk_type == SOCK_STREAM) {
if (opt) {
struct tcp_sock *tp = tcp_sk(sk);
if (!((1 << sk->sk_state) &
(TCPF_LISTEN | TCPF_CLOSE))
&& inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
tp->ext_header_len = opt->opt_flen + opt->opt_nflen;
tcp_sync_mss(sk, tp->pmtu_cookie);
}
}
opt = xchg(&np->opt, opt);
sk_dst_reset(sk);
} else {
write_lock(&sk->sk_dst_lock);
opt = xchg(&np->opt, opt);
write_unlock(&sk->sk_dst_lock);
sk_dst_reset(sk);
}
done:
if (opt)
sock_kfree_s(sk, opt, opt->tot_len);
break;
}
case IPV6_UNICAST_HOPS:
if (val > 255 || val < -1)
goto e_inval;
np->hop_limit = val;
retv = 0;
break;
case IPV6_MULTICAST_HOPS:
if (sk->sk_type == SOCK_STREAM)
goto e_inval;
if (val > 255 || val < -1)
goto e_inval;
np->mcast_hops = val;
retv = 0;
break;
case IPV6_MULTICAST_LOOP:
np->mc_loop = valbool;
retv = 0;
break;
case IPV6_MULTICAST_IF:
if (sk->sk_type == SOCK_STREAM)
goto e_inval;
if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val)
goto e_inval;
if (__dev_get_by_index(val) == NULL) {
retv = -ENODEV;
break;
}
np->mcast_oif = val;
retv = 0;
break;
case IPV6_ADD_MEMBERSHIP:
case IPV6_DROP_MEMBERSHIP:
{
struct ipv6_mreq mreq;
retv = -EFAULT;
if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
break;
if (optname == IPV6_ADD_MEMBERSHIP)
retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
else
retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
break;
}
case IPV6_JOIN_ANYCAST:
case IPV6_LEAVE_ANYCAST:
{
struct ipv6_mreq mreq;
if (optlen != sizeof(struct ipv6_mreq))
goto e_inval;
retv = -EFAULT;
if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
break;
if (optname == IPV6_JOIN_ANYCAST)
retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
else
retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
break;
}
case MCAST_JOIN_GROUP:
case MCAST_LEAVE_GROUP:
{
struct group_req greq;
struct sockaddr_in6 *psin6;
retv = -EFAULT;
if (copy_from_user(&greq, optval, sizeof(struct group_req)))
break;
if (greq.gr_group.ss_family != AF_INET6) {
retv = -EADDRNOTAVAIL;
break;
}
psin6 = (struct sockaddr_in6 *)&greq.gr_group;
if (optname == MCAST_JOIN_GROUP)
retv = ipv6_sock_mc_join(sk, greq.gr_interface,
&psin6->sin6_addr);
else
retv = ipv6_sock_mc_drop(sk, greq.gr_interface,
&psin6->sin6_addr);
break;
}
case MCAST_JOIN_SOURCE_GROUP:
case MCAST_LEAVE_SOURCE_GROUP:
case MCAST_BLOCK_SOURCE:
case MCAST_UNBLOCK_SOURCE:
{
struct group_source_req greqs;
int omode, add;
if (optlen != sizeof(struct group_source_req))
goto e_inval;
if (copy_from_user(&greqs, optval, sizeof(greqs))) {
retv = -EFAULT;
break;
}
if (greqs.gsr_group.ss_family != AF_INET6 ||
greqs.gsr_source.ss_family != AF_INET6) {
retv = -EADDRNOTAVAIL;
break;
}
if (optname == MCAST_BLOCK_SOURCE) {
omode = MCAST_EXCLUDE;
add = 1;
} else if (optname == MCAST_UNBLOCK_SOURCE) {
omode = MCAST_EXCLUDE;
add = 0;
} else if (optname == MCAST_JOIN_SOURCE_GROUP) {
struct sockaddr_in6 *psin6;
psin6 = (struct sockaddr_in6 *)&greqs.gsr_group;
retv = ipv6_sock_mc_join(sk, greqs.gsr_interface,
&psin6->sin6_addr);
if (retv)
break;
omode = MCAST_INCLUDE;
add = 1;
} else /*IP_DROP_SOURCE_MEMBERSHIP */ {
omode = MCAST_INCLUDE;
add = 0;
}
retv = ip6_mc_source(add, omode, sk, &greqs);
break;
}
case MCAST_MSFILTER:
{
extern int sysctl_optmem_max;
extern int sysctl_mld_max_msf;
struct group_filter *gsf;
if (optlen < GROUP_FILTER_SIZE(0))
goto e_inval;
if (optlen > sysctl_optmem_max) {
retv = -ENOBUFS;
break;
}
gsf = (struct group_filter *)kmalloc(optlen,GFP_KERNEL);
if (gsf == 0) {
retv = -ENOBUFS;
break;
}
retv = -EFAULT;
if (copy_from_user(gsf, optval, optlen)) {
kfree(gsf);
break;
}
/* numsrc >= (4G-140)/128 overflow in 32 bits */
if (gsf->gf_numsrc >= 0x1ffffffU ||
gsf->gf_numsrc > sysctl_mld_max_msf) {
kfree(gsf);
retv = -ENOBUFS;
break;
}
if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) {
kfree(gsf);
retv = -EINVAL;
break;
}
retv = ip6_mc_msfilter(sk, gsf);
kfree(gsf);
break;
}
case IPV6_ROUTER_ALERT:
retv = ip6_ra_control(sk, val, NULL);
break;
case IPV6_MTU_DISCOVER:
if (val<0 || val>2)
goto e_inval;
np->pmtudisc = val;
retv = 0;
break;
case IPV6_MTU:
if (val && val < IPV6_MIN_MTU)
goto e_inval;
np->frag_size = val;
retv = 0;
break;
case IPV6_RECVERR:
np->recverr = valbool;
if (!val)
skb_queue_purge(&sk->sk_error_queue);
retv = 0;
break;
case IPV6_FLOWINFO_SEND:
np->sndflow = valbool;
retv = 0;
break;
case IPV6_FLOWLABEL_MGR:
retv = ipv6_flowlabel_opt(sk, optval, optlen);
break;
case IPV6_IPSEC_POLICY:
case IPV6_XFRM_POLICY:
retv = -EPERM;
if (!capable(CAP_NET_ADMIN))
break;
retv = xfrm_user_policy(sk, optname, optval, optlen);
break;
#ifdef CONFIG_NETFILTER
default:
retv = nf_setsockopt(sk, PF_INET6, optname, optval,
optlen);
break;
#endif
}
release_sock(sk);
out:
return retv;
e_inval:
release_sock(sk);
return -EINVAL;
}
int ipv6_setsockopt(struct sock *sk, int level, int optname, char *optval,
int optlen)
{
struct ipv6_pinfo *np = &sk->net_pinfo.af_inet6;
int val, valbool;
int retv = -ENOPROTOOPT;
if(level==SOL_IP && sk->type != SOCK_RAW)
return udp_prot.setsockopt(sk, level, optname, optval, optlen);
if(level!=SOL_IPV6)
goto out;
if (optval == NULL)
val=0;
else if (get_user(val, (int *) optval))
return -EFAULT;
valbool = (val!=0);
lock_sock(sk);
switch (optname) {
case IPV6_ADDRFORM:
if (val == PF_INET) {
struct ipv6_txoptions *opt;
struct sk_buff *pktopt;
if (sk->protocol != IPPROTO_UDP &&
sk->protocol != IPPROTO_TCP)
break;
if (sk->state != TCP_ESTABLISHED) {
retv = -ENOTCONN;
break;
}
if (!(ipv6_addr_type(&np->daddr) & IPV6_ADDR_MAPPED)) {
retv = -EADDRNOTAVAIL;
break;
}
fl6_free_socklist(sk);
ipv6_sock_mc_close(sk);
if (sk->protocol == IPPROTO_TCP) {
struct tcp_opt *tp = &(sk->tp_pinfo.af_tcp);
local_bh_disable();
sock_prot_dec_use(sk->prot);
sock_prot_inc_use(&tcp_prot);
local_bh_enable();
sk->prot = &tcp_prot;
tp->af_specific = &ipv4_specific;
sk->socket->ops = &inet_stream_ops;
sk->family = PF_INET;
tcp_sync_mss(sk, tp->pmtu_cookie);
} else {
local_bh_disable();
sock_prot_dec_use(sk->prot);
sock_prot_inc_use(&udp_prot);
local_bh_enable();
sk->prot = &udp_prot;
sk->socket->ops = &inet_dgram_ops;
sk->family = PF_INET;
}
opt = xchg(&np->opt, NULL);
if (opt)
sock_kfree_s(sk, opt, opt->tot_len);
pktopt = xchg(&np->pktoptions, NULL);
if (pktopt)
kfree_skb(pktopt);
sk->destruct = inet_sock_destruct;
#ifdef INET_REFCNT_DEBUG
atomic_dec(&inet6_sock_nr);
#endif
MOD_DEC_USE_COUNT;
retv = 0;
break;
}
goto e_inval;
case IPV6_PKTINFO:
np->rxopt.bits.rxinfo = valbool;
retv = 0;
break;
case IPV6_HOPLIMIT:
np->rxopt.bits.rxhlim = valbool;
retv = 0;
break;
case IPV6_RTHDR:
if (val < 0 || val > 2)
goto e_inval;
np->rxopt.bits.srcrt = val;
retv = 0;
break;
case IPV6_HOPOPTS:
np->rxopt.bits.hopopts = valbool;
retv = 0;
break;
case IPV6_AUTHHDR:
np->rxopt.bits.authhdr = valbool;
retv = 0;
break;
case IPV6_DSTOPTS:
np->rxopt.bits.dstopts = valbool;
retv = 0;
break;
case IPV6_FLOWINFO:
np->rxopt.bits.rxflow = valbool;
retv = 0;
break;
case IPV6_PKTOPTIONS:
{
struct ipv6_txoptions *opt = NULL;
struct msghdr msg;
struct flowi fl;
int junk;
fl.fl6_flowlabel = 0;
fl.oif = sk->bound_dev_if;
if (optlen == 0)
goto update;
/* 1K is probably excessive
* 1K is surely not enough, 2K per standard header is 16K.
*/
retv = -EINVAL;
if (optlen > 64*1024)
break;
opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL);
retv = -ENOBUFS;
if (opt == NULL)
break;
memset(opt, 0, sizeof(*opt));
opt->tot_len = sizeof(*opt) + optlen;
retv = -EFAULT;
if (copy_from_user(opt+1, optval, optlen))
goto done;
msg.msg_controllen = optlen;
msg.msg_control = (void*)(opt+1);
retv = datagram_send_ctl(&msg, &fl, opt, &junk);
if (retv)
goto done;
update:
retv = 0;
if (sk->type == SOCK_STREAM) {
if (opt) {
struct tcp_opt *tp = &sk->tp_pinfo.af_tcp;
if (!((1<<sk->state)&(TCPF_LISTEN|TCPF_CLOSE))
&& sk->daddr != LOOPBACK4_IPV6) {
tp->ext_header_len = opt->opt_flen + opt->opt_nflen;
tcp_sync_mss(sk, tp->pmtu_cookie);
}
}
opt = xchg(&np->opt, opt);
sk_dst_reset(sk);
} else {
write_lock(&sk->dst_lock);
opt = xchg(&np->opt, opt);
write_unlock(&sk->dst_lock);
sk_dst_reset(sk);
}
done:
if (opt)
sock_kfree_s(sk, opt, opt->tot_len);
break;
}
case IPV6_UNICAST_HOPS:
if (val > 255 || val < -1)
goto e_inval;
np->hop_limit = val;
retv = 0;
break;
case IPV6_MULTICAST_HOPS:
if (sk->type == SOCK_STREAM)
goto e_inval;
if (val > 255 || val < -1)
goto e_inval;
np->mcast_hops = val;
retv = 0;
break;
case IPV6_MULTICAST_LOOP:
np->mc_loop = valbool;
retv = 0;
break;
case IPV6_MULTICAST_IF:
if (sk->type == SOCK_STREAM)
goto e_inval;
if (sk->bound_dev_if && sk->bound_dev_if != val)
goto e_inval;
if (__dev_get_by_index(val) == NULL) {
retv = -ENODEV;
break;
}
np->mcast_oif = val;
retv = 0;
break;
case IPV6_ADD_MEMBERSHIP:
case IPV6_DROP_MEMBERSHIP:
{
struct ipv6_mreq mreq;
retv = -EFAULT;
if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
break;
if (optname == IPV6_ADD_MEMBERSHIP)
retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
else
retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
break;
}
case IPV6_ROUTER_ALERT:
retv = ip6_ra_control(sk, val, NULL);
break;
case IPV6_MTU_DISCOVER:
if (val<0 || val>2)
goto e_inval;
np->pmtudisc = val;
retv = 0;
break;
case IPV6_MTU:
if (val && val < IPV6_MIN_MTU)
goto e_inval;
np->frag_size = val;
retv = 0;
break;
case IPV6_RECVERR:
np->recverr = valbool;
if (!val)
skb_queue_purge(&sk->error_queue);
retv = 0;
break;
case IPV6_FLOWINFO_SEND:
np->sndflow = valbool;
retv = 0;
break;
case IPV6_FLOWLABEL_MGR:
retv = ipv6_flowlabel_opt(sk, optval, optlen);
break;
#ifdef CONFIG_NETFILTER
default:
retv = nf_setsockopt(sk, PF_INET6, optname, optval,
optlen);
break;
#endif
}
release_sock(sk);
out:
return retv;
e_inval:
release_sock(sk);
return -EINVAL;
}
/* Grrr, addr_type already calculated by caller, but I don't want
* to add some silly "cookie" argument to this method just for that.
*/
static int udp_v6_get_port(struct sock *sk, unsigned short snum)
{
write_lock_bh(&udp_hash_lock);
if (snum == 0) {
int best_size_so_far, best, result, i;
if (udp_port_rover > sysctl_local_port_range[1] ||
udp_port_rover < sysctl_local_port_range[0])
udp_port_rover = sysctl_local_port_range[0];
best_size_so_far = 32767;
best = result = udp_port_rover;
for (i = 0; i < UDP_HTABLE_SIZE; i++, result++) {
struct sock *sk;
int size;
sk = udp_hash[result & (UDP_HTABLE_SIZE - 1)];
if (!sk) {
if (result > sysctl_local_port_range[1])
result = sysctl_local_port_range[0] +
((result - sysctl_local_port_range[0]) &
(UDP_HTABLE_SIZE - 1));
goto gotit;
}
size = 0;
do {
if (++size >= best_size_so_far)
goto next;
} while ((sk = sk->next) != NULL);
best_size_so_far = size;
best = result;
next:
;
}
result = best;
for(;; result += UDP_HTABLE_SIZE) {
if (result > sysctl_local_port_range[1])
result = sysctl_local_port_range[0]
+ ((result - sysctl_local_port_range[0]) &
(UDP_HTABLE_SIZE - 1));
if (!udp_lport_inuse(result))
break;
}
gotit:
udp_port_rover = snum = result;
} else {
struct sock *sk2;
int addr_type = ipv6_addr_type(&sk->net_pinfo.af_inet6.rcv_saddr);
for (sk2 = udp_hash[snum & (UDP_HTABLE_SIZE - 1)];
sk2 != NULL;
sk2 = sk2->next) {
if (sk2->num == snum &&
sk2 != sk &&
sk2->bound_dev_if == sk->bound_dev_if &&
(!sk2->rcv_saddr ||
addr_type == IPV6_ADDR_ANY ||
!ipv6_addr_cmp(&sk->net_pinfo.af_inet6.rcv_saddr,
&sk2->net_pinfo.af_inet6.rcv_saddr) ||
(addr_type == IPV6_ADDR_MAPPED &&
sk2->family == AF_INET &&
sk->rcv_saddr == sk2->rcv_saddr)) &&
(!sk2->reuse || !sk->reuse))
goto fail;
}
}
sk->num = snum;
if (sk->pprev == NULL) {
struct sock **skp = &udp_hash[snum & (UDP_HTABLE_SIZE - 1)];
if ((sk->next = *skp) != NULL)
(*skp)->pprev = &sk->next;
*skp = sk;
sk->pprev = skp;
sock_prot_inc_use(sk->prot);
sock_hold(sk);
}
write_unlock_bh(&udp_hash_lock);
return 0;
fail:
write_unlock_bh(&udp_hash_lock);
return 1;
}
/* Grrr, addr_type already calculated by caller, but I don't want
* to add some silly "cookie" argument to this method just for that.
*/
static int udp_v6_get_port(struct sock *sk, unsigned short snum)
{
write_lock_bh(&udp_hash_lock);
if (snum == 0) {
int best_size_so_far, best, result, i;
if (udp_port_rover > sysctl_local_port_range[1] ||
udp_port_rover < sysctl_local_port_range[0])
udp_port_rover = sysctl_local_port_range[0];
best_size_so_far = 32767;
best = result = udp_port_rover;
for (i = 0; i < UDP_HTABLE_SIZE; i++, result++) {
struct sock *sk;
int size;
sk = udp_hash[result & (UDP_HTABLE_SIZE - 1)];
if (!sk) {
if (result > sysctl_local_port_range[1])
result = sysctl_local_port_range[0] +
((result - sysctl_local_port_range[0]) &
(UDP_HTABLE_SIZE - 1));
goto gotit;
}
size = 0;
do {
if (++size >= best_size_so_far)
goto next;
} while ((sk = sk->next) != NULL);
best_size_so_far = size;
best = result;
next:;
}
result = best;
for(;; result += UDP_HTABLE_SIZE) {
if (result > sysctl_local_port_range[1])
result = sysctl_local_port_range[0]
+ ((result - sysctl_local_port_range[0]) &
(UDP_HTABLE_SIZE - 1));
if (!udp_lport_inuse(result))
break;
}
gotit:
udp_port_rover = snum = result;
} else {
struct sock *sk2;
int sk_reuse, sk2_reuse;
int addr_type = ipv6_addr_type(&sk->net_pinfo.af_inet6.rcv_saddr),
addr_type2;
#if defined(CONFIG_NET_RESTRICTED_REUSE) || defined(CONFIG_IPV6_RESTRICTED_DOUBLE_BIND)
uid_t sk_uid = sock_i_uid_t(sk),
sk2_uid;
#endif
sk_reuse = 0;
if (sk->reuse)
sk_reuse |= 1;
#ifdef SO_REUSEPORT
if (sk->reuseport)
sk_reuse |= 2;
#endif
if (sk_reuse &&
(addr_type != IPV6_ADDR_MAPPED ? (addr_type & IPV6_ADDR_MULTICAST) : MULTICAST(sk->rcv_saddr)))
sk_reuse |= 4;
for (sk2 = udp_hash[snum & (UDP_HTABLE_SIZE - 1)];
sk2 != NULL;
sk2 = sk2->next) {
#if 1 /* XXX: should be recoded like 2.4.21 */
#if defined(CONFIG_NET_RESTRICTED_REUSE) || defined(CONFIG_IPV6_RESTRICTED_DOUBLE_BIND)
int uid_ok;
#endif
int both_specified = 0;
if (sk2->num != snum ||
sk2 == sk ||
(sk2->bound_dev_if && sk->bound_dev_if &&
sk2->bound_dev_if != sk->bound_dev_if))
continue;
#if 0
if (sk2->family != AF_INET6 && sk2->family != AF_INET)
continue;
#endif
addr_type2 = sk2->family == AF_INET6 ? ipv6_addr_type(&sk2->net_pinfo.af_inet6.rcv_saddr) : IPV6_ADDR_MAPPED;
#if defined(CONFIG_NET_RESTRICTED_REUSE) || defined(CONFIG_IPV6_RESTRICTED_DOUBLE_BIND)
sk2_uid = sock_i_uid_t(sk2);
#endif
if ((addr_type2 != IPV6_ADDR_MAPPED ? addr_type2 != IPV6_ADDR_ANY : sk2->rcv_saddr) &&
(addr_type != IPV6_ADDR_MAPPED ? addr_type != IPV6_ADDR_ANY : sk->rcv_saddr)) {
if (addr_type2 == IPV6_ADDR_MAPPED || addr_type == IPV6_ADDR_MAPPED) {
if (addr_type2 != addr_type ||
sk2->rcv_saddr != sk->rcv_saddr)
continue;
} else {
if (ipv6_addr_cmp(&sk2->net_pinfo.af_inet6.rcv_saddr,
&sk->net_pinfo.af_inet6.rcv_saddr))
continue;
}
both_specified = 1;
}
#if defined(CONFIG_NET_RESTRICTED_REUSE) || defined(CONFIG_IPV6_RESTRICTED_DOUBLE_BIND)
uid_ok = sk2_uid == (uid_t) -1 || sk_uid == sk2_uid;
#endif
if ((addr_type2 == IPV6_ADDR_MAPPED &&
addr_type != IPV6_ADDR_MAPPED && sk->net_pinfo.af_inet6.ipv6only) ||
(addr_type == IPV6_ADDR_MAPPED &&
addr_type2 != IPV6_ADDR_MAPPED && sk2->net_pinfo.af_inet6.ipv6only)) {
#ifdef CONFIG_IPV6_RESTRICTED_DOUBLE_BIND
if (sysctl_ipv6_bindv6only_restriction == 0 || uid_ok)
continue;
#else
continue;
#endif
}
sk2_reuse = 0;
if (sk2->reuse)
sk2_reuse |= 1;
#ifdef SO_REUSEPORT
if (sk2->reuseport)
sk2_reuse |= 2;
#endif
if (sk2_reuse &&
(addr_type2 != IPV6_ADDR_MAPPED ? (addr_type2 & IPV6_ADDR_MULTICAST) : MULTICAST(sk2->rcv_saddr)))
sk2_reuse |= 4;
if (sk2_reuse & sk_reuse & 3) { /* NOT && */
if (sk2_reuse & sk_reuse & 4)
continue;
#ifdef CONFIG_NET_RESTRICTED_REUSE
if (!uid_ok)
goto fail;
#endif
#ifdef SO_REUSEPORT
if (sk2_reuse & sk_reuse & 2)
continue;
#endif
if (both_specified) {
int addr_type2d = sk2->family == AF_INET6 ? ipv6_addr_type(&sk2->net_pinfo.af_inet6.daddr) : IPV6_ADDR_MAPPED;
if (addr_type2d != IPV6_ADDR_MAPPED ? addr_type2d != IPV6_ADDR_ANY : sk2->daddr)
continue;
} else {
if ((addr_type2 != IPV6_ADDR_MAPPED ? addr_type2 != IPV6_ADDR_ANY : sk2->rcv_saddr) ||
(addr_type != IPV6_ADDR_MAPPED ? addr_type != IPV6_ADDR_ANY : sk->rcv_saddr))
continue;
}
}
goto fail;
#else /* XXX: should be recoded like 2.4.21 */
if (sk2->num == snum &&
sk2 != sk &&
(!sk2->bound_dev_if ||
!sk->bound_dev_if ||
sk2->bound_dev_if == sk->bound_dev_if) &&
((!sk2->rcv_saddr && !ipv6_only_sock(sk)) ||
(sk2->family == AF_INET6 &&
ipv6_addr_any(&sk2->net_pinfo.af_inet6.rcv_saddr) &&
!(ipv6_only_sock(sk2) && addr_type == IPV6_ADDR_MAPPED)) ||
(addr_type == IPV6_ADDR_ANY &&
(!ipv6_only_sock(sk) ||
!(sk2->family == AF_INET6 ? (ipv6_addr_type(&sk2->net_pinfo.af_inet6.rcv_saddr) == IPV6_ADDR_MAPPED) : 1))) ||
(sk2->family == AF_INET6 &&
!ipv6_addr_cmp(&sk->net_pinfo.af_inet6.rcv_saddr,
&sk2->net_pinfo.af_inet6.rcv_saddr)) ||
(addr_type == IPV6_ADDR_MAPPED &&
!ipv6_only_sock(sk2) &&
(!sk2->rcv_saddr ||
!sk->rcv_saddr ||
sk->rcv_saddr == sk2->rcv_saddr))) &&
(!sk2->reuse || !sk->reuse))
goto fail;
#endif /* XXX: should be recoded like 2.4.21 */
}
}
sk->num = snum;
if (sk->pprev == NULL) {
struct sock **skp = &udp_hash[snum & (UDP_HTABLE_SIZE - 1)];
if ((sk->next = *skp) != NULL)
(*skp)->pprev = &sk->next;
*skp = sk;
sk->pprev = skp;
sock_prot_inc_use(sk->prot);
sock_hold(sk);
}
write_unlock_bh(&udp_hash_lock);
return 0;
fail:
write_unlock_bh(&udp_hash_lock);
return 1;
}
static int udp_v4_get_port(struct sock *sk, unsigned short snum)
{
write_lock_bh(&udp_hash_lock);
if (snum == 0) {
int best_size_so_far, best, result, i;
if (udp_port_rover > sysctl_local_port_range[1] ||
udp_port_rover < sysctl_local_port_range[0])
udp_port_rover = sysctl_local_port_range[0];
best_size_so_far = 32767;
best = result = udp_port_rover;
for (i = 0; i < UDP_HTABLE_SIZE; i++, result++) {
struct sock *sk;
int size;
sk = udp_hash[result & (UDP_HTABLE_SIZE - 1)];
if (!sk) {
if (result > sysctl_local_port_range[1])
result = sysctl_local_port_range[0] +
((result - sysctl_local_port_range[0]) &
(UDP_HTABLE_SIZE - 1));
goto gotit;
}
size = 0;
do {
if (++size >= best_size_so_far)
goto next;
} while ((sk = sk->next) != NULL);
best_size_so_far = size;
best = result;
next:;
}
result = best;
for(i = 0; i < (1 << 16) / UDP_HTABLE_SIZE; i++, result += UDP_HTABLE_SIZE) {
if (result > sysctl_local_port_range[1])
result = sysctl_local_port_range[0]
+ ((result - sysctl_local_port_range[0]) &
(UDP_HTABLE_SIZE - 1));
if (!udp_lport_inuse(result))
break;
}
if (i >= (1 << 16) / UDP_HTABLE_SIZE)
goto fail;
gotit:
udp_port_rover = snum = result;
} else {
struct sock *sk2;
for (sk2 = udp_hash[snum & (UDP_HTABLE_SIZE - 1)];
sk2 != NULL;
sk2 = sk2->next) {
if (sk2->num == snum &&
sk2 != sk &&
!ipv6_only_sock(sk2) &&
sk2->bound_dev_if == sk->bound_dev_if &&
(!sk2->rcv_saddr ||
!sk->rcv_saddr ||
sk2->rcv_saddr == sk->rcv_saddr) &&
(!sk2->reuse || !sk->reuse))
goto fail;
}
}
sk->num = snum;
if (sk->pprev == NULL) {
struct sock **skp = &udp_hash[snum & (UDP_HTABLE_SIZE - 1)];
if ((sk->next = *skp) != NULL)
(*skp)->pprev = &sk->next;
*skp = sk;
sk->pprev = skp;
sock_prot_inc_use(sk->prot);
sock_hold(sk);
}
write_unlock_bh(&udp_hash_lock);
return 0;
fail:
write_unlock_bh(&udp_hash_lock);
return 1;
}