git: 39f7de587b7f - main - divert_packet: ip is only used for SCTP.

The branch main has been updated by jhb:

URL: https://cgit.FreeBSD.org/src/commit/?id=39f7de587b7f0c5d8e17134d2bfde111a07f2b8c

commit 39f7de587b7f0c5d8e17134d2bfde111a07f2b8c
Author:     John Baldwin <jhb@FreeBSD.org>
AuthorDate: 2022-04-13 23:08:23 +0000
Commit:     John Baldwin <jhb@FreeBSD.org>
CommitDate: 2022-04-13 23:08:23 +0000

    divert_packet: ip is only used for SCTP.
---
 sys/netinet/ip_divert.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sys/netinet/ip_divert.c b/sys/netinet/ip_divert.c
index 6c4d85b03e6a..a745073d1ec0 100644
--- a/sys/netinet/ip_divert.c
+++ b/sys/netinet/ip_divert.c
@@ -178,7 +178,9 @@ div_port_match(const struct inpcb *inp, void *v)
 static void
 divert_packet(struct mbuf *m, bool incoming)
 {
+#if defined(SCTP) || defined(SCTP_SUPPORT)
 	struct ip *ip;
+#endif
 	struct inpcb *inp;
 	struct socket *sa;
 	u_int16_t nport;
@@ -198,7 +200,6 @@ divert_packet(struct mbuf *m, bool incoming)
 	if (m->m_len < sizeof(struct ip) &&
 	    (m = m_pullup(m, sizeof(struct ip))) == NULL)
 		return;
-	ip = mtod(m, struct ip *);
 
 	/* Delayed checksums are currently not compatible with divert. */
 	if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) {
@@ -207,6 +208,7 @@ divert_packet(struct mbuf *m, bool incoming)
 	}
 #if defined(SCTP) || defined(SCTP_SUPPORT)
 	if (m->m_pkthdr.csum_flags & CSUM_SCTP) {
+		ip = mtod(m, struct ip *);
 		sctp_delayed_cksum(m, (uint32_t)(ip->ip_hl << 2));
 		m->m_pkthdr.csum_flags &= ~CSUM_SCTP;
 	}