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Diffstat (limited to 'net/ipv4/tcp_ipv4.c')
-rw-r--r--net/ipv4/tcp_ipv4.c143
1 files changed, 75 insertions, 68 deletions
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index dadf80272413..010dff442a11 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -93,16 +93,18 @@ static struct socket *tcp_socket;
void tcp_v4_send_check(struct sock *sk, int len, struct sk_buff *skb);
#ifdef CONFIG_TCP_MD5SIG
-static struct tcp_md5sig_key *tcp_v4_md5_do_lookup(struct sock *sk, __be32 addr);
+static struct tcp_md5sig_key *tcp_v4_md5_do_lookup(struct sock *sk,
+ __be32 addr);
static int tcp_v4_do_calc_md5_hash(char *md5_hash, struct tcp_md5sig_key *key,
- __be32 saddr, __be32 daddr, struct tcphdr *th,
- int protocol, int tcplen);
+ __be32 saddr, __be32 daddr,
+ struct tcphdr *th, int protocol,
+ int tcplen);
#endif
struct inet_hashinfo __cacheline_aligned tcp_hashinfo = {
- .lhash_lock = __RW_LOCK_UNLOCKED(tcp_hashinfo.lhash_lock),
- .lhash_users = ATOMIC_INIT(0),
- .lhash_wait = __WAIT_QUEUE_HEAD_INITIALIZER(tcp_hashinfo.lhash_wait),
+ .lhash_lock = __RW_LOCK_UNLOCKED(tcp_hashinfo.lhash_lock),
+ .lhash_users = ATOMIC_INIT(0),
+ .lhash_wait = __WAIT_QUEUE_HEAD_INITIALIZER(tcp_hashinfo.lhash_wait),
};
static int tcp_v4_get_port(struct sock *sk, unsigned short snum)
@@ -215,13 +217,14 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
if (tcp_death_row.sysctl_tw_recycle &&
!tp->rx_opt.ts_recent_stamp && rt->rt_dst == daddr) {
struct inet_peer *peer = rt_get_peer(rt);
-
- /* VJ's idea. We save last timestamp seen from
- * the destination in peer table, when entering state TIME-WAIT
- * and initialize rx_opt.ts_recent from it, when trying new connection.
+ /*
+ * VJ's idea. We save last timestamp seen from
+ * the destination in peer table, when entering state
+ * TIME-WAIT * and initialize rx_opt.ts_recent from it,
+ * when trying new connection.
*/
-
- if (peer && peer->tcp_ts_stamp + TCP_PAWS_MSL >= xtime.tv_sec) {
+ if (peer != NULL &&
+ peer->tcp_ts_stamp + TCP_PAWS_MSL >= xtime.tv_sec) {
tp->rx_opt.ts_recent_stamp = peer->tcp_ts_stamp;
tp->rx_opt.ts_recent = peer->tcp_ts;
}
@@ -246,7 +249,8 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
if (err)
goto failure;
- err = ip_route_newports(&rt, IPPROTO_TCP, inet->sport, inet->dport, sk);
+ err = ip_route_newports(&rt, IPPROTO_TCP,
+ inet->sport, inet->dport, sk);
if (err)
goto failure;
@@ -270,7 +274,10 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
return 0;
failure:
- /* This unhashes the socket and releases the local port, if necessary. */
+ /*
+ * This unhashes the socket and releases the local port,
+ * if necessary.
+ */
tcp_set_state(sk, TCP_CLOSE);
ip_rt_put(rt);
sk->sk_route_caps = 0;
@@ -495,7 +502,8 @@ void tcp_v4_send_check(struct sock *sk, int len, struct sk_buff *skb)
struct tcphdr *th = skb->h.th;
if (skb->ip_summed == CHECKSUM_PARTIAL) {
- th->check = ~tcp_v4_check(th, len, inet->saddr, inet->daddr, 0);
+ th->check = ~tcp_v4_check(th, len,
+ inet->saddr, inet->daddr, 0);
skb->csum = offsetof(struct tcphdr, check);
} else {
th->check = tcp_v4_check(th, len, inet->saddr, inet->daddr,
@@ -572,7 +580,7 @@ static void tcp_v4_send_reset(struct sock *sk, struct sk_buff *skb)
skb->len - (th->doff << 2));
}
- memset(&arg, 0, sizeof arg);
+ memset(&arg, 0, sizeof(arg));
arg.iov[0].iov_base = (unsigned char *)&rep;
arg.iov[0].iov_len = sizeof(rep.th);
@@ -595,9 +603,8 @@ static void tcp_v4_send_reset(struct sock *sk, struct sk_buff *skb)
arg.iov[0].iov_len);
}
#endif
-
arg.csum = csum_tcpudp_nofold(skb->nh.iph->daddr,
- skb->nh.iph->saddr, /*XXX*/
+ skb->nh.iph->saddr, /* XXX */
sizeof(struct tcphdr), IPPROTO_TCP, 0);
arg.csumoffset = offsetof(struct tcphdr, check) / 2;
@@ -631,7 +638,7 @@ static void tcp_v4_send_ack(struct tcp_timewait_sock *twsk,
#endif
memset(&rep.th, 0, sizeof(struct tcphdr));
- memset(&arg, 0, sizeof arg);
+ memset(&arg, 0, sizeof(arg));
arg.iov[0].iov_base = (unsigned char *)&rep;
arg.iov[0].iov_len = sizeof(rep.th);
@@ -668,9 +675,8 @@ static void tcp_v4_send_ack(struct tcp_timewait_sock *twsk,
tw_key.key = twsk->tw_md5_key;
tw_key.keylen = twsk->tw_md5_keylen;
key = &tw_key;
- } else {
+ } else
key = NULL;
- }
if (key) {
int offset = (ts) ? 3 : 0;
@@ -690,9 +696,8 @@ static void tcp_v4_send_ack(struct tcp_timewait_sock *twsk,
arg.iov[0].iov_len);
}
#endif
-
arg.csum = csum_tcpudp_nofold(skb->nh.iph->daddr,
- skb->nh.iph->saddr, /*XXX*/
+ skb->nh.iph->saddr, /* XXX */
arg.iov[0].iov_len, IPPROTO_TCP, 0);
arg.csumoffset = offsetof(struct tcphdr, check) / 2;
@@ -707,12 +712,14 @@ static void tcp_v4_timewait_ack(struct sock *sk, struct sk_buff *skb)
struct tcp_timewait_sock *tcptw = tcp_twsk(sk);
tcp_v4_send_ack(tcptw, skb, tcptw->tw_snd_nxt, tcptw->tw_rcv_nxt,
- tcptw->tw_rcv_wnd >> tw->tw_rcv_wscale, tcptw->tw_ts_recent);
+ tcptw->tw_rcv_wnd >> tw->tw_rcv_wscale,
+ tcptw->tw_ts_recent);
inet_twsk_put(tw);
}
-static void tcp_v4_reqsk_send_ack(struct sk_buff *skb, struct request_sock *req)
+static void tcp_v4_reqsk_send_ack(struct sk_buff *skb,
+ struct request_sock *req)
{
tcp_v4_send_ack(NULL, skb, tcp_rsk(req)->snt_isn + 1,
tcp_rsk(req)->rcv_isn + 1, req->rcv_wnd,
@@ -809,7 +816,8 @@ static struct ip_options *tcp_v4_save_options(struct sock *sk,
*/
/* Find the Key structure for an address. */
-static struct tcp_md5sig_key *tcp_v4_md5_do_lookup(struct sock *sk, __be32 addr)
+static struct tcp_md5sig_key *
+ tcp_v4_md5_do_lookup(struct sock *sk, __be32 addr)
{
struct tcp_sock *tp = tcp_sk(sk);
int i;
@@ -818,7 +826,8 @@ static struct tcp_md5sig_key *tcp_v4_md5_do_lookup(struct sock *sk, __be32 addr)
return NULL;
for (i = 0; i < tp->md5sig_info->entries4; i++) {
if (tp->md5sig_info->keys4[i].addr == addr)
- return (struct tcp_md5sig_key *)&tp->md5sig_info->keys4[i];
+ return (struct tcp_md5sig_key *)
+ &tp->md5sig_info->keys4[i];
}
return NULL;
}
@@ -915,13 +924,12 @@ int tcp_v4_md5_do_del(struct sock *sk, __be32 addr)
if (tp->md5sig_info->entries4 == 0) {
kfree(tp->md5sig_info->keys4);
tp->md5sig_info->keys4 = NULL;
- } else {
+ } else if (tp->md5sig_info->entries4 != i) {
/* Need to do some manipulation */
- if (tp->md5sig_info->entries4 != i)
- memcpy(&tp->md5sig_info->keys4[i],
- &tp->md5sig_info->keys4[i+1],
- (tp->md5sig_info->entries4 - i)
- * sizeof (struct tcp4_md5sig_key));
+ memcpy(&tp->md5sig_info->keys4[i],
+ &tp->md5sig_info->keys4[i+1],
+ (tp->md5sig_info->entries4 - i) *
+ sizeof(struct tcp4_md5sig_key));
}
tcp_free_md5sig_pool();
return 0;
@@ -932,7 +940,7 @@ int tcp_v4_md5_do_del(struct sock *sk, __be32 addr)
EXPORT_SYMBOL(tcp_v4_md5_do_del);
-static void tcp_v4_clear_md5_list (struct sock *sk)
+static void tcp_v4_clear_md5_list(struct sock *sk)
{
struct tcp_sock *tp = tcp_sk(sk);
@@ -954,8 +962,8 @@ static void tcp_v4_clear_md5_list (struct sock *sk)
}
}
-static int tcp_v4_parse_md5_keys (struct sock *sk, char __user *optval,
- int optlen)
+static int tcp_v4_parse_md5_keys(struct sock *sk, char __user *optval,
+ int optlen)
{
struct tcp_md5sig cmd;
struct sockaddr_in *sin = (struct sockaddr_in *)&cmd.tcpm_addr;
@@ -964,7 +972,7 @@ static int tcp_v4_parse_md5_keys (struct sock *sk, char __user *optval,
if (optlen < sizeof(cmd))
return -EINVAL;
- if (copy_from_user (&cmd, optval, sizeof(cmd)))
+ if (copy_from_user(&cmd, optval, sizeof(cmd)))
return -EFAULT;
if (sin->sin_family != AF_INET)
@@ -981,9 +989,8 @@ static int tcp_v4_parse_md5_keys (struct sock *sk, char __user *optval,
if (!tcp_sk(sk)->md5sig_info) {
struct tcp_sock *tp = tcp_sk(sk);
- struct tcp_md5sig_info *p;
+ struct tcp_md5sig_info *p = kzalloc(sizeof(*p), GFP_KERNEL);
- p = kzalloc(sizeof(struct tcp_md5sig_info), GFP_KERNEL);
if (!p)
return -EINVAL;
@@ -1044,8 +1051,8 @@ static int tcp_v4_do_calc_md5_hash(char *md5_hash, struct tcp_md5sig_key *key,
#ifdef CONFIG_TCP_MD5SIG_DEBUG
printk("Calcuating hash for: ");
- for (i = 0; i < sizeof (*bp); i++)
- printk ("%02x ", (unsigned int)((unsigned char *)bp)[i]);
+ for (i = 0; i < sizeof(*bp); i++)
+ printk("%02x ", (unsigned int)((unsigned char *)bp)[i]);
printk(" ");
#endif
@@ -1057,8 +1064,8 @@ static int tcp_v4_do_calc_md5_hash(char *md5_hash, struct tcp_md5sig_key *key,
sg_set_buf(&sg[block++], th, sizeof(struct tcphdr));
nbytes += sizeof(struct tcphdr);
#ifdef CONFIG_TCP_MD5SIG_DEBUG
- for (i = 0; i < sizeof (struct tcphdr); i++)
- printk (" %02x", (unsigned int)((unsigned char *)th)[i]);
+ for (i = 0; i < sizeof(struct tcphdr); i++)
+ printk(" %02x", (unsigned int)((unsigned char *)th)[i]);
#endif
/* 3. the TCP segment data (if any) */
data_len = tcplen - (th->doff << 2);
@@ -1075,9 +1082,9 @@ static int tcp_v4_do_calc_md5_hash(char *md5_hash, struct tcp_md5sig_key *key,
nbytes += key->keylen;
#ifdef CONFIG_TCP_MD5SIG_DEBUG
- printk (" and password: ");
+ printk(" and password: ");
for (i = 0; i < key->keylen; i++)
- printk ("%02x ", (unsigned int)key->key[i]);
+ printk("%02x ", (unsigned int)key->key[i]);
#endif
/* Now store the Hash into the packet */
@@ -1099,7 +1106,7 @@ out:
#ifdef CONFIG_TCP_MD5SIG_DEBUG
printk(" result:");
for (i = 0; i < 16; i++)
- printk (" %02x", (unsigned int)(((u8*)md5_hash)[i]));
+ printk(" %02x", (unsigned int)(((u8*)md5_hash)[i]));
printk("\n");
#endif
return 0;
@@ -1135,7 +1142,7 @@ int tcp_v4_calc_md5_hash(char *md5_hash, struct tcp_md5sig_key *key,
EXPORT_SYMBOL(tcp_v4_calc_md5_hash);
-static int tcp_v4_inbound_md5_hash (struct sock *sk, struct sk_buff *skb)
+static int tcp_v4_inbound_md5_hash(struct sock *sk, struct sk_buff *skb)
{
/*
* This gets called for each TCP segment that arrives
@@ -1149,7 +1156,7 @@ static int tcp_v4_inbound_md5_hash (struct sock *sk, struct sk_buff *skb)
struct tcp_md5sig_key *hash_expected;
struct iphdr *iph = skb->nh.iph;
struct tcphdr *th = skb->h.th;
- int length = (th->doff << 2) - sizeof (struct tcphdr);
+ int length = (th->doff << 2) - sizeof(struct tcphdr);
int genhash;
unsigned char *ptr;
unsigned char newhash[16];
@@ -1200,22 +1207,18 @@ done_opts:
return 0;
if (hash_expected && !hash_location) {
- if (net_ratelimit()) {
- printk(KERN_INFO "MD5 Hash NOT expected but found "
+ LIMIT_NETDEBUG(KERN_INFO "MD5 Hash NOT expected but found "
"(" NIPQUAD_FMT ", %d)->(" NIPQUAD_FMT ", %d)\n",
- NIPQUAD (iph->saddr), ntohs(th->source),
- NIPQUAD (iph->daddr), ntohs(th->dest));
- }
+ NIPQUAD(iph->saddr), ntohs(th->source),
+ NIPQUAD(iph->daddr), ntohs(th->dest));
return 1;
}
if (!hash_expected && hash_location) {
- if (net_ratelimit()) {
- printk(KERN_INFO "MD5 Hash NOT expected but found "
+ LIMIT_NETDEBUG(KERN_INFO "MD5 Hash NOT expected but found "
"(" NIPQUAD_FMT ", %d)->(" NIPQUAD_FMT ", %d)\n",
- NIPQUAD (iph->saddr), ntohs(th->source),
- NIPQUAD (iph->daddr), ntohs(th->dest));
- }
+ NIPQUAD(iph->saddr), ntohs(th->source),
+ NIPQUAD(iph->daddr), ntohs(th->dest));
return 1;
}
@@ -1232,15 +1235,16 @@ done_opts:
if (net_ratelimit()) {
printk(KERN_INFO "MD5 Hash failed for "
"(" NIPQUAD_FMT ", %d)->(" NIPQUAD_FMT ", %d)%s\n",
- NIPQUAD (iph->saddr), ntohs(th->source),
- NIPQUAD (iph->daddr), ntohs(th->dest),
+ NIPQUAD(iph->saddr), ntohs(th->source),
+ NIPQUAD(iph->daddr), ntohs(th->dest),
genhash ? " tcp_v4_calc_md5_hash failed" : "");
#ifdef CONFIG_TCP_MD5SIG_DEBUG
do {
int i;
printk("Received: ");
for (i = 0; i < 16; i++)
- printk("%02x ", 0xff & (int)hash_location[i]);
+ printk("%02x ",
+ 0xff & (int)hash_location[i]);
printk("\n");
printk("Calculated: ");
for (i = 0; i < 16; i++)
@@ -1582,7 +1586,7 @@ int tcp_v4_do_rcv(struct sock *sk, struct sk_buff *skb)
* o We're expecting an MD5'd packet and this is no MD5 tcp option
* o There is an MD5 option and we're not expecting one
*/
- if (tcp_v4_inbound_md5_hash (sk, skb))
+ if (tcp_v4_inbound_md5_hash(sk, skb))
goto discard;
#endif
@@ -2155,7 +2159,7 @@ static void *established_get_idx(struct seq_file *seq, loff_t pos)
while (rc && pos) {
rc = established_get_next(seq, rc);
--pos;
- }
+ }
return rc;
}
@@ -2284,7 +2288,7 @@ int tcp_proc_register(struct tcp_seq_afinfo *afinfo)
afinfo->seq_fops->read = seq_read;
afinfo->seq_fops->llseek = seq_lseek;
afinfo->seq_fops->release = seq_release_private;
-
+
p = proc_net_fops_create(afinfo->name, S_IRUGO, afinfo->seq_fops);
if (p)
p->data = afinfo;
@@ -2298,7 +2302,7 @@ void tcp_proc_unregister(struct tcp_seq_afinfo *afinfo)
if (!afinfo)
return;
proc_net_remove(afinfo->name);
- memset(afinfo->seq_fops, 0, sizeof(*afinfo->seq_fops));
+ memset(afinfo->seq_fops, 0, sizeof(*afinfo->seq_fops));
}
static void get_openreq4(struct sock *sk, struct request_sock *req,
@@ -2356,7 +2360,8 @@ static void get_tcp4_sock(struct sock *sp, char *tmpbuf, int i)
"%08X %5d %8d %lu %d %p %u %u %u %u %d",
i, src, srcp, dest, destp, sp->sk_state,
tp->write_seq - tp->snd_una,
- (sp->sk_state == TCP_LISTEN) ? sp->sk_ack_backlog : (tp->rcv_nxt - tp->copied_seq),
+ sp->sk_state == TCP_LISTEN ? sp->sk_ack_backlog :
+ (tp->rcv_nxt - tp->copied_seq),
timer_active,
jiffies_to_clock_t(timer_expires - jiffies),
icsk->icsk_retransmits,
@@ -2371,7 +2376,8 @@ static void get_tcp4_sock(struct sock *sp, char *tmpbuf, int i)
tp->snd_ssthresh >= 0xFFFF ? -1 : tp->snd_ssthresh);
}
-static void get_timewait4_sock(struct inet_timewait_sock *tw, char *tmpbuf, int i)
+static void get_timewait4_sock(struct inet_timewait_sock *tw,
+ char *tmpbuf, int i)
{
__be32 dest, src;
__u16 destp, srcp;
@@ -2484,7 +2490,8 @@ struct proto tcp_prot = {
void __init tcp_v4_init(struct net_proto_family *ops)
{
- if (inet_csk_ctl_sock_create(&tcp_socket, PF_INET, SOCK_RAW, IPPROTO_TCP) < 0)
+ if (inet_csk_ctl_sock_create(&tcp_socket, PF_INET, SOCK_RAW,
+ IPPROTO_TCP) < 0)
panic("Failed to create the TCP control socket.\n");
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-22 14:08:34 +0000