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Commit 267e891b authored by Arnaldo Carvalho de Melo's avatar Arnaldo Carvalho de Melo Committed by David S. Miller
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[X25] assorted code cleanup

parent 53cdc7d9
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Showing with 96 additions and 72 deletions
net/x25/af_x25.c
View file @ 267e891b
/*
* X.25 Packet Layer release 002
*
* This is ALPHA test software. This code may break your machine, randomly fail to work with new
* releases, misbehave and/or generally screw up. It might even work.
* This is ALPHA test software. This code may break your machine,
* randomly fail to work with new releases, misbehave and/or generally
* screw up. It might even work.
*
* This code REQUIRES 2.1.15 or higher
*
......@@ -102,8 +103,7 @@ int x25_addr_ntoa(unsigned char *p, struct x25_address *called_addr,
}
}
*called = '\0';
*calling = '\0';
*called = *calling = '\0';
return 1 + (called_len + calling_len + 1) / 2;
}
......@@ -535,7 +535,8 @@ static int x25_release(struct socket *sock)
struct sock *sk = sock->sk;
x25_cb *x25;
if (sk == NULL) return 0;
if (!sk)
goto out;
x25 = x25_sk(sk);
......@@ -560,14 +561,11 @@ static int x25_release(struct socket *sock)
sk->dead = 1;
sk->destroy = 1;
break;
default:
break;
}
sock->sk = NULL;
sk->socket = NULL; /* Not used, but we should do this */
out:
return 0;
}
......@@ -765,7 +763,7 @@ int x25_rx_call_request(struct sk_buff *skb, struct x25_neigh *neigh, unsigned i
x25_cb *makex25;
struct x25_address source_addr, dest_addr;
struct x25_facilities facilities;
int len;
int len, rc;
/*
* Remove the LCI and frame type.
......@@ -786,18 +784,14 @@ int x25_rx_call_request(struct sk_buff *skb, struct x25_neigh *neigh, unsigned i
/*
* We can't accept the Call Request.
*/
if (!sk || sk->ack_backlog == sk->max_ack_backlog) {
x25_transmit_clear_request(neigh, lci, 0x01);
return 0;
}
if (!sk || sk->ack_backlog == sk->max_ack_backlog)
goto out_clear_request;
/*
* Try to reach a compromise on the requested facilities.
*/
if ((len = x25_negotiate_facilities(skb, sk, &facilities)) == -1) {
x25_transmit_clear_request(neigh, lci, 0x01);
return 0;
}
if ((len = x25_negotiate_facilities(skb, sk, &facilities)) == -1)
goto out_clear_request;
/*
* current neighbour/link might impose additional limits
......@@ -810,10 +804,8 @@ int x25_rx_call_request(struct sk_buff *skb, struct x25_neigh *neigh, unsigned i
* Try to create a new socket.
*/
make = x25_make_new(sk);
if (!make) {
x25_transmit_clear_request(neigh, lci, 0x01);
return 0;
}
if (!make)
goto out_clear_request;
/*
* Remove the facilities, leaving any Call User Data.
......@@ -854,8 +846,13 @@ int x25_rx_call_request(struct sk_buff *skb, struct x25_neigh *neigh, unsigned i
if (!sk->dead)
sk->data_ready(sk, skb->len);
return 1;
rc = 1;
out:
return rc;
out_clear_request:
rc = 0;
x25_transmit_clear_request(neigh, lci, 0x01);
goto out;
}
static int x25_sendmsg(struct socket *sock, struct msghdr *msg, int len, struct scm_cookie *scm)
......@@ -1123,6 +1120,7 @@ static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
{
struct sock *sk = sock->sk;
x25_cb *x25 = x25_sk(sk);
int rc;
switch (cmd) {
case TIOCOUTQ: {
......@@ -1130,26 +1128,33 @@ static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
amount = sk->sndbuf - atomic_read(&sk->wmem_alloc);
if (amount < 0)
amount = 0;
return put_user(amount, (unsigned int *)arg);
rc = put_user(amount, (unsigned int *)arg);
break;
}
case TIOCINQ: {
struct sk_buff *skb;
int amount = 0;
/* These two are safe on a single CPU system as only user tasks fiddle here */
/*
* These two are safe on a single CPU system as
* only user tasks fiddle here
*/
if ((skb = skb_peek(&sk->receive_queue)) != NULL)
amount = skb->len;
return put_user(amount, (unsigned int *)arg);
rc = put_user(amount, (unsigned int *)arg);
break;
}
case SIOCGSTAMP:
if (sk != NULL) {
if (sk->stamp.tv_sec == 0)
return -ENOENT;
return copy_to_user((void *)arg, &sk->stamp, sizeof(struct timeval)) ? -EFAULT : 0;
if (sk) {
rc = -ENOENT;
if (!sk->stamp.tv_sec)
break;
rc = copy_to_user((void *)arg, &sk->stamp,
sizeof(struct timeval)) ? -EFAULT : 0;
}
return -EINVAL;
rc = -EINVAL;
break;
case SIOCGIFADDR:
case SIOCSIFADDR:
case SIOCGIFDSTADDR:
......@@ -1160,74 +1165,90 @@ static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
case SIOCSIFNETMASK:
case SIOCGIFMETRIC:
case SIOCSIFMETRIC:
return -EINVAL;
rc = -EINVAL;
break;
case SIOCADDRT:
case SIOCDELRT:
if (!capable(CAP_NET_ADMIN)) return -EPERM;
return x25_route_ioctl(cmd, (void *)arg);
rc = -EPERM;
if (!capable(CAP_NET_ADMIN))
break;
rc = x25_route_ioctl(cmd, (void *)arg);
break;
case SIOCX25GSUBSCRIP:
return x25_subscr_ioctl(cmd, (void *)arg);
rc = x25_subscr_ioctl(cmd, (void *)arg);
break;
case SIOCX25SSUBSCRIP:
if (!capable(CAP_NET_ADMIN)) return -EPERM;
return x25_subscr_ioctl(cmd, (void *)arg);
rc = -EPERM;
if (!capable(CAP_NET_ADMIN))
break;
rc = x25_subscr_ioctl(cmd, (void *)arg);
break;
case SIOCX25GFACILITIES: {
struct x25_facilities facilities;
facilities = x25->facilities;
return copy_to_user((void *)arg, &facilities, sizeof(facilities)) ? -EFAULT : 0;
struct x25_facilities fac = x25->facilities;
rc = copy_to_user((void *)arg, &fac, sizeof(fac)) ? -EFAULT : 0;
break;
}
case SIOCX25SFACILITIES: {
struct x25_facilities facilities;
rc = -EFAULT;
if (copy_from_user(&facilities, (void *)arg, sizeof(facilities)))
return -EFAULT;
break;
rc = -EINVAL;
if (sk->state != TCP_LISTEN && sk->state != TCP_CLOSE)
return -EINVAL;
if (facilities.pacsize_in < X25_PS16 || facilities.pacsize_in > X25_PS4096)
return -EINVAL;
if (facilities.pacsize_out < X25_PS16 || facilities.pacsize_out > X25_PS4096)
return -EINVAL;
if (facilities.winsize_in < 1 || facilities.winsize_in > 127)
return -EINVAL;
if (facilities.throughput < 0x03 || facilities.throughput > 0xDD)
return -EINVAL;
if (facilities.reverse != 0 && facilities.reverse != 1)
return -EINVAL;
break;
if (facilities.pacsize_in < X25_PS16 ||
facilities.pacsize_in > X25_PS4096)
break;
if (facilities.pacsize_out < X25_PS16 ||
facilities.pacsize_out > X25_PS4096)
break;
if (facilities.winsize_in < 1 ||
facilities.winsize_in > 127)
break;
if (facilities.throughput < 0x03 ||
facilities.throughput > 0xDD)
break;
if (facilities.reverse && facilities.reverse != 1)
break;
x25->facilities = facilities;
return 0;
rc = 0;
break;
}
case SIOCX25GCALLUSERDATA: {
struct x25_calluserdata calluserdata;
calluserdata = x25->calluserdata;
return copy_to_user((void *)arg, &calluserdata, sizeof(calluserdata)) ? -EFAULT : 0;
struct x25_calluserdata cud = x25->calluserdata;
rc = copy_to_user((void *)arg, &cud, sizeof(cud)) ? -EFAULT : 0;
break;
}
case SIOCX25SCALLUSERDATA: {
struct x25_calluserdata calluserdata;
rc = -EFAULT;
if (copy_from_user(&calluserdata, (void *)arg, sizeof(calluserdata)))
return -EFAULT;
break;
rc = -EINVAL;
if (calluserdata.cudlength > X25_MAX_CUD_LEN)
return -EINVAL;
break;
x25->calluserdata = calluserdata;
return 0;
rc = 0;
break;
}
case SIOCX25GCAUSEDIAG: {
struct x25_causediag causediag;
causediag = x25->causediag;
return copy_to_user((void *)arg, &causediag, sizeof(causediag)) ? -EFAULT : 0;
rc = copy_to_user((void *)arg, &causediag, sizeof(causediag)) ? -EFAULT : 0;
break;
}
default:
return dev_ioctl(cmd, (void *)arg);
rc = dev_ioctl(cmd, (void *)arg);
break;
}
/*NOTREACHED*/
return 0;
return rc;
}
static int x25_get_info(char *buffer, char **start, off_t offset, int length)
......@@ -1235,13 +1256,14 @@ static int x25_get_info(char *buffer, char **start, off_t offset, int length)
struct sock *s;
struct net_device *dev;
const char *devname;
int len = 0;
int len;
off_t pos = 0;
off_t begin = 0;
cli();
len += sprintf(buffer, "dest_addr src_addr dev lci st vs vr va t t2 t21 t22 t23 Snd-Q Rcv-Q inode\n");
len = sprintf(buffer, "dest_addr src_addr dev lci st vs vr va "
"t t2 t21 t22 t23 Snd-Q Rcv-Q inode\n");
for (s = x25_list; s; s = s->next) {
x25_cb *x25 = x25_sk(s);
......@@ -1251,7 +1273,9 @@ static int x25_get_info(char *buffer, char **start, off_t offset, int length)
else
devname = x25->neighbour->dev->name;
len += sprintf(buffer + len, "%-10s %-10s %-5s %3.3X %d %d %d %d %3lu %3lu %3lu %3lu %3lu %5d %5d %ld\n",
len += sprintf(buffer + len, "%-10s %-10s %-5s %3.3X %d %d "
"%d %d %3lu %3lu %3lu %3lu %3lu "
"%5d %5d %ld\n",
!x25->dest_addr.x25_addr[0] ? "*" :
x25->dest_addr.x25_addr,
!x25->source_addr.x25_addr[0] ? "*" :
......
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