From 6af3fd8d22dcc4a45a3a04799eaa75514d2cafbc Mon Sep 17 00:00:00 2001
From: Brian Somers <brian@FreeBSD.org>
Date: Thu, 27 Jan 2000 23:37:39 +0000
Subject: [PATCH] Redo the intrq.c idea as

  int family_enqueue(sa_family_t, struct mbuf *);
---
 sys/net/if_tun.c | 117 +----------------------------------------------
 sys/net/intrq.c  |  67 +++++++++++++++++++++++++--
 sys/net/intrq.h  |  15 ++----
 3 files changed, 68 insertions(+), 131 deletions(-)

diff --git a/sys/net/if_tun.c b/sys/net/if_tun.c
index 9db0048b73a1..6a59859028ca 100644
--- a/sys/net/if_tun.c
+++ b/sys/net/if_tun.c
@@ -46,42 +46,11 @@
 #include <net/route.h>
 #include <net/intrq.h>
 
-#ifdef ATM_CORE
-#include <netatm/kern_include.h>
-#include <netatm/atm.h>
-#include <netatm/atm_var.h>
-#endif
-
 #ifdef INET
 #include <netinet/in.h>
 #include <netinet/in_var.h>
 #endif
 
-#ifdef INET6
-#include <netinet6/in6.h>
-#include <netinet6/in6_var.h>
-#endif
-
-#ifdef IPX
-#include <netipx/ipx.h>
-#include <netipx/ipx_if.h>
-#endif
-
-#ifdef NATM
-#include <netnatm/natm.h>
-#endif
-
-#ifdef NETATALK
-#include <netatalk/at.h>
-#include <netatalk/at_var.h>
-#endif
-
-#ifdef NS
-/* This will never be defined by config(8), or for the if_tun module ! */
-#include <netns/ns.h>
-#include <netns/ns_if.h>
-#endif
-
 #include <net/bpf.h>
 
 #include <net/if_tunvar.h>
@@ -631,9 +600,8 @@ tunwrite(dev, uio, flag)
 	struct tun_softc *tp = dev->si_drv1;
 	struct ifnet	*ifp = &tp->tun_if;
 	struct mbuf	*top, **mp, *m;
-	int		error=0, s, tlen, mlen, isr;
+	int		error=0, tlen, mlen;
 	u_int32_t	family;
-	struct ifqueue	*q;
 
 	TUNDEBUG("%s%d: tunwrite\n", ifp->if_name, ifp->if_unit);
 
@@ -713,88 +681,7 @@ tunwrite(dev, uio, flag)
 	} else
 		family = AF_INET;
 
-	q = NULL;
-	isr = 0;
-
-	switch (family) {
-#ifdef ATM_CORE
-	case AF_ATM:
-		if (atmintrq_present) {
-			q = &atm_intrq;
-			isr = NETISR_ATM;
-		}
-		break;
-#endif
-#ifdef INET
-	case AF_INET:
-		if (ipintrq_present) {
-			q = &ipintrq;
-			isr = NETISR_IP;
-		}
-		break;
-#endif
-#ifdef INET6
-	case AF_INET6:
-		if (ip6intrq_present) {
-			q = &ip6intrq;
-			isr = NETISR_IPV6;
-		}
-		break;
-#endif
-#ifdef IPX
-	case AF_IPX:
-		if (ipxintrq_present) {
-			q = &ipxintrq;
-			isr = NETISR_IPX;
-		}
-		break;
-#endif
-#ifdef NATM
-	case AF_NATM:
-		if (natmintrq_present) {
-			q = &natmintrq;
-			isr = NETISR_NATM;
-		}
-		break;
-#endif
-#ifdef NETATALK
-	case AF_APPLETALK:
-		if (atintrq2_present) {
-			q = &atintrq2;
-			isr = NETISR_ATALK;
-		}
-		break;
-#endif
-#ifdef NS
-	case AF_NS:
-		if (nsintrq_present) {
-			q = &nsintrq;
-			isr = NETISR_NS;
-		}
-		break;
-#endif
-	}
-
-	if (!q) {
-		m_freem(top);
-		return EAFNOSUPPORT;
-	}
-
-	s = splimp();
-	if (IF_QFULL (q)) {
-		IF_DROP(q);
-		splx(s);
-		ifp->if_collisions++;
-		m_freem(top);
-		return ENOBUFS;
-	}
-	IF_ENQUEUE(q, top);
-	splx(s);
-	ifp->if_ibytes += tlen;
-	ifp->if_ipackets++;
-	schednetisr(isr);
-
-	return error;
+	return family_enqueue(family, top);
 }
 
 /*
diff --git a/sys/net/intrq.c b/sys/net/intrq.c
index df6e45c020de..b2d625965cbf 100644
--- a/sys/net/intrq.c
+++ b/sys/net/intrq.c
@@ -26,35 +26,92 @@
  * $FreeBSD$
  */
 
-#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/mbuf.h>
 #include <sys/socket.h>
+#include <sys/systm.h>
 #include <sys/time.h>
 
 #include <net/if.h>
 #include <net/if_var.h>
+#include <net/netisr.h>
 #include <net/intrq.h>
 
+#ifdef __i386__
+#include <netatm/atm_if.h>
+#endif
+
 /*
  * If the appropriate intrq_present variable is zero, don't use
  * the queue (as it'll never get processed).
  * When defined, each of the network stacks declares their own
  * *intrq_present variable to be non-zero.
  */
-
 const int	atintrq1_present;
 const int	atintrq2_present;
+#ifdef NETISR_ATM
 const int	atmintrq_present;
+#endif
 const int	ipintrq_present;
 const int	ip6intrq_present;
 const int	ipxintrq_present;
 const int	natmintrq_present;
 const int	nsintrq_present;
 
-struct ifqueue	atintrq1;
-struct ifqueue	atintrq2;
-struct ifqueue	atm_intrq;
+struct ifqueue	at1intrq;
+struct ifqueue	at2intrq;
+#ifdef NETISR_ATM
+struct ifqueue	atmintrq;
+#endif
 struct ifqueue	ipintrq;
 struct ifqueue	ip6intrq;
 struct ifqueue	ipxintrq;
 struct ifqueue	natmintrq;
 struct ifqueue	nsintrq;
+
+
+static const struct {
+	sa_family_t family;
+	struct ifqueue *q;
+	int const *present;
+	int isr;
+} queue[] = {
+#ifdef NETISR_ATM
+	{ AF_ATM, &atm_intrq, &atmintrq_present, NETISR_ATM },
+#endif
+	{ AF_INET, &ipintrq, &ipintrq_present, NETISR_IP },
+	{ AF_INET6, &ip6intrq, &ip6intrq_present, NETISR_IPV6 },
+	{ AF_IPX, &ipxintrq, &ipxintrq_present, NETISR_IPX },
+	{ AF_NATM, &natmintrq, &natmintrq_present, NETISR_NATM },
+	{ AF_APPLETALK, &at2intrq, &atintrq2_present, NETISR_ATALK },
+	{ AF_NS, &nsintrq, &nsintrq_present, NETISR_NS }
+};
+
+int
+family_enqueue(family, m)
+	sa_family_t family;
+	struct mbuf *m;
+{
+	int entry, s;
+
+	for (entry = 0; entry < sizeof queue / sizeof queue[0]; entry++)
+		if (queue[entry].family == family) {
+			if (queue[entry].present) {
+				s = splimp();
+				if (IF_QFULL(queue[entry].q)) {
+					IF_DROP(queue[entry].q);
+					splx(s);
+					m_freem(m);
+					return ENOBUFS;
+				}
+				IF_ENQUEUE(queue[entry].q, m);
+				splx(s);
+				schednetisr(queue[entry].isr);
+				return 0;
+			} else
+				break;
+		}
+
+	m_freem(m);
+	return EAFNOSUPPORT;
+}
diff --git a/sys/net/intrq.h b/sys/net/intrq.h
index a97cf2957e29..c17cafd4ddc1 100644
--- a/sys/net/intrq.h
+++ b/sys/net/intrq.h
@@ -26,18 +26,11 @@
  * $FreeBSD$
  */
 
-#ifndef _INTRQ_H_
-#define	_INTRQ_H_
+#ifndef _NET_INTRQ_H_
+#define	_NET_INTRQ_H_
 
 #ifdef _KERNEL
-extern const int	atintrq1_present;
-extern const int	atintrq2_present;
-extern const int	atmintrq_present;
-extern const int	ipintrq_present;
-extern const int	ip6intrq_present;
-extern const int	ipxintrq_present;
-extern const int	natmintrq_present;
-extern const int	nsintrq_present;
+extern int	family_enqueue __P((sa_family_t, struct mbuf *));
 #endif
 
-#endif /* _INTRQ_H_ */
+#endif /* _NET_INTRQ_H_ */