/* This must be called before lost_out is incremented */
static void tcp_verify_retransmit_hint(struct tcp_sock *tp, struct sk_buff *skb)
{
- if ((tp->retransmit_skb_hint == NULL) ||
+ if (!tp->retransmit_skb_hint ||
before(TCP_SKB_CB(skb)->seq,
TCP_SKB_CB(tp->retransmit_skb_hint)->seq))
tp->retransmit_skb_hint = skb;
fack_count += pcount;
/* Lost marker hint past SACKed? Tweak RFC3517 cnt */
- if (!tcp_is_fack(tp) && (tp->lost_skb_hint != NULL) &&
+ if (!tcp_is_fack(tp) && tp->lost_skb_hint &&
before(start_seq, TCP_SKB_CB(tp->lost_skb_hint)->seq))
tp->lost_cnt_hint += pcount;
if (!before(TCP_SKB_CB(skb)->seq, end_seq))
break;
- if ((next_dup != NULL) &&
+ if (next_dup &&
before(TCP_SKB_CB(skb)->seq, next_dup->end_seq)) {
in_sack = tcp_match_skb_to_sack(sk, skb,
next_dup->start_seq,
if (in_sack <= 0) {
tmp = tcp_shift_skb_data(sk, skb, state,
start_seq, end_seq, dup_sack);
- if (tmp != NULL) {
+ if (tmp) {
if (tmp != skb) {
skb = tmp;
continue;
struct tcp_sacktag_state *state,
u32 skip_to_seq)
{
- if (next_dup == NULL)
+ if (!next_dup)
return skb;
if (before(next_dup->start_seq, skip_to_seq)) {
if (tcp_highest_sack_seq(tp) == cache->end_seq) {
/* ...but better entrypoint exists! */
skb = tcp_highest_sack(sk);
- if (skb == NULL)
+ if (!skb)
break;
state.fack_count = tp->fackets_out;
cache++;
if (!before(start_seq, tcp_highest_sack_seq(tp))) {
skb = tcp_highest_sack(sk);
- if (skb == NULL)
+ if (!skb)
break;
state.fack_count = tp->fackets_out;
}
*/
if (opsize < TCPOLEN_EXP_FASTOPEN_BASE ||
get_unaligned_be16(ptr) != TCPOPT_FASTOPEN_MAGIC ||
- foc == NULL || !th->syn || (opsize & 1))
+ !foc || !th->syn || (opsize & 1))
break;
foc->len = opsize - TCPOLEN_EXP_FASTOPEN_BASE;
if (foc->len >= TCP_FASTOPEN_COOKIE_MIN &&
struct sk_buff *head;
u32 start, end;
- if (skb == NULL)
+ if (!skb)
return;
start = TCP_SKB_CB(skb)->seq;
{
struct tcp_sock *tp = tcp_sk(sk);
- if (unlikely(sk->sk_rx_dst == NULL))
+ if (unlikely(!sk->sk_rx_dst))
inet_csk(sk)->icsk_af_ops->sk_rx_dst_set(sk, skb);
/*
* Header prediction.
tcp_set_state(sk, TCP_ESTABLISHED);
- if (skb != NULL) {
+ if (skb) {
icsk->icsk_af_ops->sk_rx_dst_set(sk, skb);
security_inet_conn_established(sk, skb);
}
}
req = tp->fastopen_rsk;
- if (req != NULL) {
+ if (req) {
WARN_ON_ONCE(sk->sk_state != TCP_SYN_RECV &&
sk->sk_state != TCP_FIN_WAIT1);
- if (tcp_check_req(sk, skb, req, true) == NULL)
+ if (!tcp_check_req(sk, skb, req, true))
goto discard;
}
* ACK we have received, this would have acknowledged
* our SYNACK so stop the SYNACK timer.
*/
- if (req != NULL) {
+ if (req) {
/* Return RST if ack_seq is invalid.
* Note that RFC793 only says to generate a
* DUPACK for it but for TCP Fast Open it seems