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-rw-r--r--drivers/s390/net/qeth_l3_main.c12
-rw-r--r--include/net/iucv/af_iucv.h5
-rw-r--r--net/iucv/af_iucv.c42
3 files changed, 23 insertions, 36 deletions
diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c
index 2756795f7708..7148ef71ac78 100644
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -1348,6 +1348,7 @@ static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb,
static int qeth_l3_process_inbound_buffer(struct qeth_card *card,
int budget, int *done)
{
+ struct net_device *dev = card->dev;
int work_done = 0;
struct sk_buff *skb;
struct qeth_hdr *hdr;
@@ -1369,11 +1370,10 @@ static int qeth_l3_process_inbound_buffer(struct qeth_card *card,
magic = *(__u16 *)skb->data;
if ((card->info.type == QETH_CARD_TYPE_IQD) &&
(magic == ETH_P_AF_IUCV)) {
- skb->protocol = cpu_to_be16(ETH_P_AF_IUCV);
len = skb->len;
- card->dev->header_ops->create(skb, card->dev, 0,
- card->dev->dev_addr, "FAKELL", len);
- skb_reset_mac_header(skb);
+ dev_hard_header(skb, dev, ETH_P_AF_IUCV,
+ dev->dev_addr, "FAKELL", len);
+ skb->protocol = eth_type_trans(skb, dev);
netif_receive_skb(skb);
} else {
qeth_l3_rebuild_skb(card, skb, hdr);
@@ -2005,17 +2005,15 @@ static void qeth_l3_fill_af_iucv_hdr(struct qeth_hdr *hdr, struct sk_buff *skb,
unsigned int data_len)
{
char daddr[16];
- struct af_iucv_trans_hdr *iucv_hdr;
hdr->hdr.l3.id = QETH_HEADER_TYPE_LAYER3;
hdr->hdr.l3.length = data_len;
hdr->hdr.l3.flags = QETH_HDR_IPV6 | QETH_CAST_UNICAST;
- iucv_hdr = (struct af_iucv_trans_hdr *)(skb_mac_header(skb) + ETH_HLEN);
memset(daddr, 0, sizeof(daddr));
daddr[0] = 0xfe;
daddr[1] = 0x80;
- memcpy(&daddr[8], iucv_hdr->destUserID, 8);
+ memcpy(&daddr[8], iucv_trans_hdr(skb)->destUserID, 8);
memcpy(hdr->hdr.l3.next_hop.ipv6_addr, daddr, 16);
}
diff --git a/include/net/iucv/af_iucv.h b/include/net/iucv/af_iucv.h
index f4c21b5a1242..14a490246be9 100644
--- a/include/net/iucv/af_iucv.h
+++ b/include/net/iucv/af_iucv.h
@@ -80,6 +80,11 @@ struct af_iucv_trans_hdr {
u8 pad; /* total 104 bytes */
} __packed;
+static inline struct af_iucv_trans_hdr *iucv_trans_hdr(struct sk_buff *skb)
+{
+ return (struct af_iucv_trans_hdr *)skb_network_header(skb);
+}
+
enum iucv_tx_notify {
/* transmission of skb is completed and was successful */
TX_NOTIFY_OK = 0,
diff --git a/net/iucv/af_iucv.c b/net/iucv/af_iucv.c
index 5b68ee908107..45115c125569 100644
--- a/net/iucv/af_iucv.c
+++ b/net/iucv/af_iucv.c
@@ -320,13 +320,9 @@ static int afiucv_hs_send(struct iucv_message *imsg, struct sock *sock,
struct sk_buff *nskb;
int err, confirm_recv = 0;
- memset(skb->head, 0, ETH_HLEN);
- phs_hdr = skb_push(skb, sizeof(struct af_iucv_trans_hdr));
- skb_reset_mac_header(skb);
+ phs_hdr = skb_push(skb, sizeof(*phs_hdr));
+ memset(phs_hdr, 0, sizeof(*phs_hdr));
skb_reset_network_header(skb);
- skb_push(skb, ETH_HLEN);
- skb_reset_mac_header(skb);
- memset(phs_hdr, 0, sizeof(struct af_iucv_trans_hdr));
phs_hdr->magic = ETH_P_AF_IUCV;
phs_hdr->version = 1;
@@ -350,6 +346,9 @@ static int afiucv_hs_send(struct iucv_message *imsg, struct sock *sock,
if (imsg)
memcpy(&phs_hdr->iucv_hdr, imsg, sizeof(struct iucv_message));
+ skb_push(skb, ETH_HLEN);
+ memset(skb->data, 0, ETH_HLEN);
+
skb->dev = iucv->hs_dev;
if (!skb->dev) {
err = -ENODEV;
@@ -1943,8 +1942,7 @@ static void iucv_callback_shutdown(struct iucv_path *path, u8 ipuser[16])
/***************** HiperSockets transport callbacks ********************/
static void afiucv_swap_src_dest(struct sk_buff *skb)
{
- struct af_iucv_trans_hdr *trans_hdr =
- (struct af_iucv_trans_hdr *)skb->data;
+ struct af_iucv_trans_hdr *trans_hdr = iucv_trans_hdr(skb);
char tmpID[8];
char tmpName[8];
@@ -1967,13 +1965,12 @@ static void afiucv_swap_src_dest(struct sk_buff *skb)
**/
static int afiucv_hs_callback_syn(struct sock *sk, struct sk_buff *skb)
{
+ struct af_iucv_trans_hdr *trans_hdr = iucv_trans_hdr(skb);
struct sock *nsk;
struct iucv_sock *iucv, *niucv;
- struct af_iucv_trans_hdr *trans_hdr;
int err;
iucv = iucv_sk(sk);
- trans_hdr = (struct af_iucv_trans_hdr *)skb->data;
if (!iucv) {
/* no sock - connection refused */
afiucv_swap_src_dest(skb);
@@ -2034,15 +2031,13 @@ out:
static int afiucv_hs_callback_synack(struct sock *sk, struct sk_buff *skb)
{
struct iucv_sock *iucv = iucv_sk(sk);
- struct af_iucv_trans_hdr *trans_hdr =
- (struct af_iucv_trans_hdr *)skb->data;
if (!iucv)
goto out;
if (sk->sk_state != IUCV_BOUND)
goto out;
bh_lock_sock(sk);
- iucv->msglimit_peer = trans_hdr->window;
+ iucv->msglimit_peer = iucv_trans_hdr(skb)->window;
sk->sk_state = IUCV_CONNECTED;
sk->sk_state_change(sk);
bh_unlock_sock(sk);
@@ -2098,8 +2093,6 @@ out:
static int afiucv_hs_callback_win(struct sock *sk, struct sk_buff *skb)
{
struct iucv_sock *iucv = iucv_sk(sk);
- struct af_iucv_trans_hdr *trans_hdr =
- (struct af_iucv_trans_hdr *)skb->data;
if (!iucv)
return NET_RX_SUCCESS;
@@ -2107,7 +2100,7 @@ static int afiucv_hs_callback_win(struct sock *sk, struct sk_buff *skb)
if (sk->sk_state != IUCV_CONNECTED)
return NET_RX_SUCCESS;
- atomic_sub(trans_hdr->window, &iucv->msg_sent);
+ atomic_sub(iucv_trans_hdr(skb)->window, &iucv->msg_sent);
iucv_sock_wake_msglim(sk);
return NET_RX_SUCCESS;
}
@@ -2170,22 +2163,13 @@ static int afiucv_hs_rcv(struct sk_buff *skb, struct net_device *dev,
int err = NET_RX_SUCCESS;
char nullstring[8];
- if (skb->len < (ETH_HLEN + sizeof(struct af_iucv_trans_hdr))) {
- WARN_ONCE(1, "AF_IUCV too short skb, len=%d, min=%d",
- (int)skb->len,
- (int)(ETH_HLEN + sizeof(struct af_iucv_trans_hdr)));
+ if (!pskb_may_pull(skb, sizeof(*trans_hdr))) {
+ WARN_ONCE(1, "AF_IUCV failed to receive skb, len=%u", skb->len);
kfree_skb(skb);
return NET_RX_SUCCESS;
}
- if (skb_headlen(skb) < (ETH_HLEN + sizeof(struct af_iucv_trans_hdr)))
- if (skb_linearize(skb)) {
- WARN_ONCE(1, "AF_IUCV skb_linearize failed, len=%d",
- (int)skb->len);
- kfree_skb(skb);
- return NET_RX_SUCCESS;
- }
- skb_pull(skb, ETH_HLEN);
- trans_hdr = (struct af_iucv_trans_hdr *)skb->data;
+
+ trans_hdr = iucv_trans_hdr(skb);
EBCASC(trans_hdr->destAppName, sizeof(trans_hdr->destAppName));
EBCASC(trans_hdr->destUserID, sizeof(trans_hdr->destUserID));
EBCASC(trans_hdr->srcAppName, sizeof(trans_hdr->srcAppName));
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.