diff --git a/sys/net/if.c b/sys/net/if.c
--- a/sys/net/if.c
+++ b/sys/net/if.c
@@ -3964,7 +3964,6 @@
 static int
 if_requestencap_default(struct ifnet *ifp, struct if_encap_req *req)
 {
-
 	if (req->rtype != IFENCAP_LL)
 		return (EOPNOTSUPP);
 
@@ -4034,7 +4033,6 @@
 int
 if_gethwaddr(struct ifnet *ifp, struct ifreq *ifr)
 {
-
 	if (ifp->if_hw_addr == NULL)
 		return (ENODEV);
 
@@ -4121,7 +4119,6 @@
 static void
 if_input_default(struct ifnet *ifp __unused, struct mbuf *m)
 {
-
 	m_freem(m);
 }
 
@@ -4198,47 +4195,42 @@
 uint64_t
 if_getbaudrate(const if_t ifp)
 {
-
-	return (((struct ifnet *)ifp)->if_baudrate);
+	return (ifp->if_baudrate);
 }
 
 int
 if_setcapabilities(if_t ifp, int capabilities)
 {
-	((struct ifnet *)ifp)->if_capabilities = capabilities;
+	ifp->if_capabilities = capabilities;
 	return (0);
 }
 
 int
 if_setcapabilitiesbit(if_t ifp, int setbit, int clearbit)
 {
-	((struct ifnet *)ifp)->if_capabilities &= ~clearbit;
-	((struct ifnet *)ifp)->if_capabilities |= setbit;
-
+	ifp->if_capabilities &= ~clearbit;
+	ifp->if_capabilities |= setbit;
 	return (0);
 }
 
 int
 if_getcapabilities(const if_t ifp)
 {
-	return ((struct ifnet *)ifp)->if_capabilities;
+	return (ifp->if_capabilities);
 }
 
 int 
 if_setcapenable(if_t ifp, int capabilities)
 {
-	((struct ifnet *)ifp)->if_capenable = capabilities;
+	ifp->if_capenable = capabilities;
 	return (0);
 }
 
 int 
 if_setcapenablebit(if_t ifp, int setcap, int clearcap)
 {
-	if(clearcap)
-		((struct ifnet *)ifp)->if_capenable &= ~clearcap;
-	if(setcap) 
-		((struct ifnet *)ifp)->if_capenable |= setcap;
-
+	ifp->if_capenable &= ~clearcap;
+	ifp->if_capenable |= setcap;
 	return (0);
 }
 
@@ -4281,19 +4273,19 @@
 const char *
 if_getdname(const if_t ifp)
 {
-	return ((struct ifnet *)ifp)->if_dname;
+	return (ifp->if_dname);
 }
 
 void
 if_setdname(if_t ifp, const char *dname)
 {
-	((struct ifnet *)ifp)->if_dname = dname;
+	ifp->if_dname = dname;
 }
 
 const char *
 if_name(if_t ifp)
 {
-	return ((struct ifnet *)ifp)->if_xname;
+	return (ifp->if_xname);
 }
 
 int
@@ -4301,7 +4293,7 @@
 {
 	if (strlen(name) > sizeof(ifp->if_xname) - 1)
 		return (ENAMETOOLONG);
-	strlcpy(ifp->if_xname, name, sizeof(ifp->if_xname));
+	strcpy(ifp->if_xname, name);
 
 	return (0);
 }
@@ -4309,14 +4301,14 @@
 int 
 if_togglecapenable(if_t ifp, int togglecap)
 {
-	((struct ifnet *)ifp)->if_capenable ^= togglecap;
+	ifp->if_capenable ^= togglecap;
 	return (0);
 }
 
 int
 if_getcapenable(const if_t ifp)
 {
-	return ((struct ifnet *)ifp)->if_capenable;
+	return (ifp->if_capenable);
 }
 
 int
@@ -4335,13 +4327,13 @@
 int
 if_getdunit(const if_t ifp)
 {
-	return ((struct ifnet *)ifp)->if_dunit;
+	return (ifp->if_dunit);
 }
 
 int
 if_getindex(const if_t ifp)
 {
-	return ((struct ifnet *)ifp)->if_index;
+	return (ifp->if_index);
 }
 
 int
@@ -4377,7 +4369,7 @@
 int
 if_getalloctype(const if_t ifp)
 {
-	return ((struct ifnet *)ifp)->if_alloctype;
+	return (ifp->if_alloctype);
 }
 
 /*
@@ -4395,8 +4387,8 @@
 int
 if_setdrvflagbits(if_t ifp, int set_flags, int clear_flags)
 {
-	((struct ifnet *)ifp)->if_drv_flags &= ~clear_flags;
-	((struct ifnet *)ifp)->if_drv_flags |= set_flags;
+	ifp->if_drv_flags &= ~clear_flags;
+	ifp->if_drv_flags |= set_flags;
 
 	return (0);
 }
@@ -4404,20 +4396,19 @@
 int
 if_getdrvflags(const if_t ifp)
 {
-	return ((struct ifnet *)ifp)->if_drv_flags;
+	return (ifp->if_drv_flags);
 }
 
 int
 if_setdrvflags(if_t ifp, int flags)
 {
-	((struct ifnet *)ifp)->if_drv_flags = flags;
+	ifp->if_drv_flags = flags;
 	return (0);
 }
 
 int
 if_setflags(if_t ifp, int flags)
 {
-
 	ifp->if_flags = flags;
 	return (0);
 }
@@ -4425,30 +4416,29 @@
 int
 if_setflagbits(if_t ifp, int set, int clear)
 {
-	((struct ifnet *)ifp)->if_flags &= ~clear;
-	((struct ifnet *)ifp)->if_flags |= set;
-
+	ifp->if_flags &= ~clear;
+	ifp->if_flags |= set;
 	return (0);
 }
 
 int
 if_getflags(const if_t ifp)
 {
-	return ((struct ifnet *)ifp)->if_flags;
+	return (ifp->if_flags);
 }
 
 int
 if_clearhwassist(if_t ifp)
 {
-	((struct ifnet *)ifp)->if_hwassist = 0;
+	ifp->if_hwassist = 0;
 	return (0);
 }
 
 int
 if_sethwassistbits(if_t ifp, int toset, int toclear)
 {
-	((struct ifnet *)ifp)->if_hwassist &= ~toclear;
-	((struct ifnet *)ifp)->if_hwassist |= toset;
+	ifp->if_hwassist &= ~toclear;
+	ifp->if_hwassist |= toset;
 
 	return (0);
 }
@@ -4456,34 +4446,34 @@
 int
 if_sethwassist(if_t ifp, int hwassist_bit)
 {
-	((struct ifnet *)ifp)->if_hwassist = hwassist_bit;
+	ifp->if_hwassist = hwassist_bit;
 	return (0);
 }
 
 int
 if_gethwassist(const if_t ifp)
 {
-	return ((struct ifnet *)ifp)->if_hwassist;
+	return (ifp->if_hwassist);
 }
 
 int
 if_togglehwassist(if_t ifp, int toggle_bits)
 {
-	((struct ifnet *)ifp)->if_hwassist ^= toggle_bits;
+	ifp->if_hwassist ^= toggle_bits;
 	return (0);
 }
 
 int
 if_setmtu(if_t ifp, int mtu)
 {
-	((struct ifnet *)ifp)->if_mtu = mtu;
+	ifp->if_mtu = mtu;
 	return (0);
 }
 
 int
 if_getmtu(const if_t ifp)
 {
-	return ((struct ifnet *)ifp)->if_mtu;
+	return (ifp->if_mtu);
 }
 
 int
@@ -4493,10 +4483,10 @@
 
 	SLIST_FOREACH(dp, &domains, dom_next) {
 		if (dp->dom_family == family && dp->dom_ifmtu != NULL)
-			return (dp->dom_ifmtu((struct ifnet *)ifp));
+			return (dp->dom_ifmtu(ifp));
 	}
 
-	return (((struct ifnet *)ifp)->if_mtu);
+	return (ifp->if_mtu);
 }
 
 /*
@@ -4625,14 +4615,14 @@
 int
 if_setsoftc(if_t ifp, void *softc)
 {
-	((struct ifnet *)ifp)->if_softc = softc;
+	ifp->if_softc = softc;
 	return (0);
 }
 
 void *
 if_getsoftc(const if_t ifp)
 {
-	return ((struct ifnet *)ifp)->if_softc;
+	return (ifp->if_softc);
 }
 
 void 
@@ -4652,41 +4642,39 @@
 uint16_t
 if_getvtag(struct mbuf *m)
 {
-
 	return (m->m_pkthdr.ether_vtag);
 }
 
 int
 if_sendq_empty(if_t ifp)
 {
-	return IFQ_DRV_IS_EMPTY(&((struct ifnet *)ifp)->if_snd);
+	return (IFQ_DRV_IS_EMPTY(&ifp->if_snd));
 }
 
 struct ifaddr *
 if_getifaddr(const if_t ifp)
 {
-	return ((struct ifnet *)ifp)->if_addr;
+	return (ifp->if_addr);
 }
 
 int
 if_getamcount(const if_t ifp)
 {
-	return ((struct ifnet *)ifp)->if_amcount;
+	return (ifp->if_amcount);
 }
 
 int
 if_setsendqready(if_t ifp)
 {
-	IFQ_SET_READY(&((struct ifnet *)ifp)->if_snd);
+	IFQ_SET_READY(&ifp->if_snd);
 	return (0);
 }
 
 int
 if_setsendqlen(if_t ifp, int tx_desc_count)
 {
-	IFQ_SET_MAXLEN(&((struct ifnet *)ifp)->if_snd, tx_desc_count);
-	((struct ifnet *)ifp)->if_snd.ifq_drv_maxlen = tx_desc_count;
-
+	IFQ_SET_MAXLEN(&ifp->if_snd, tx_desc_count);
+	ifp->if_snd.ifq_drv_maxlen = tx_desc_count;
 	return (0);
 }
 
@@ -4705,29 +4693,25 @@
 int
 if_vlantrunkinuse(if_t ifp)
 {
-	return ((struct ifnet *)ifp)->if_vlantrunk != NULL?1:0;
+	return (ifp->if_vlantrunk != NULL);
 }
 
-int
+void
 if_init(if_t ifp, void *ctx)
 {
-	(*((struct ifnet *)ifp)->if_init)(ctx);
-	return (0);
+	(*ifp->if_init)(ctx);
 }
 
-int
+void
 if_input(if_t ifp, struct mbuf* sendmp)
 {
-	(*((struct ifnet *)ifp)->if_input)((struct ifnet *)ifp, sendmp);
-	return (0);
-
+	(*ifp->if_input)(ifp, sendmp);
 }
 
 int
 if_transmit(if_t ifp, struct mbuf *m)
 {
-	(*((struct ifnet *)ifp)->if_transmit)((struct ifnet *)ifp, m);
-	return (0);
+	return ((*ifp->if_transmit)(ifp, m));
 }
 
 int
@@ -4743,29 +4727,29 @@
 if_dequeue(if_t ifp)
 {
 	struct mbuf *m;
-	IFQ_DRV_DEQUEUE(&((struct ifnet *)ifp)->if_snd, m);
 
+	IFQ_DRV_DEQUEUE(&ifp->if_snd, m);
 	return (m);
 }
 
 int
 if_sendq_prepend(if_t ifp, struct mbuf *m)
 {
-	IFQ_DRV_PREPEND(&((struct ifnet *)ifp)->if_snd, m);
+	IFQ_DRV_PREPEND(&ifp->if_snd, m);
 	return (0);
 }
 
 int
 if_setifheaderlen(if_t ifp, int len)
 {
-	((struct ifnet *)ifp)->if_hdrlen = len;
+	ifp->if_hdrlen = len;
 	return (0);
 }
 
 caddr_t
 if_getlladdr(const if_t ifp)
 {
-	return (IF_LLADDR((struct ifnet *)ifp));
+	return (IF_LLADDR(ifp));
 }
 
 void *
@@ -4775,83 +4759,72 @@
 }
 
 void
-if_bpfmtap(if_t ifh, struct mbuf *m)
+if_bpfmtap(if_t ifp, struct mbuf *m)
 {
-	struct ifnet *ifp = (struct ifnet *)ifh;
-
 	BPF_MTAP(ifp, m);
 }
 
 void
-if_etherbpfmtap(if_t ifh, struct mbuf *m)
+if_etherbpfmtap(if_t ifp, struct mbuf *m)
 {
-	struct ifnet *ifp = (struct ifnet *)ifh;
-
 	ETHER_BPF_MTAP(ifp, m);
 }
 
 void
-if_vlancap(if_t ifh)
+if_vlancap(if_t ifp)
 {
-	struct ifnet *ifp = (struct ifnet *)ifh;
 	VLAN_CAPABILITIES(ifp);
 }
 
 int
 if_sethwtsomax(if_t ifp, u_int if_hw_tsomax)
 {
-
-	((struct ifnet *)ifp)->if_hw_tsomax = if_hw_tsomax;
+	ifp->if_hw_tsomax = if_hw_tsomax;
         return (0);
 }
 
 int
 if_sethwtsomaxsegcount(if_t ifp, u_int if_hw_tsomaxsegcount)
 {
-
-	((struct ifnet *)ifp)->if_hw_tsomaxsegcount = if_hw_tsomaxsegcount;
+	ifp->if_hw_tsomaxsegcount = if_hw_tsomaxsegcount;
         return (0);
 }
 
 int
 if_sethwtsomaxsegsize(if_t ifp, u_int if_hw_tsomaxsegsize)
 {
-
-	((struct ifnet *)ifp)->if_hw_tsomaxsegsize = if_hw_tsomaxsegsize;
+	ifp->if_hw_tsomaxsegsize = if_hw_tsomaxsegsize;
         return (0);
 }
 
 u_int
 if_gethwtsomax(const if_t ifp)
 {
-
-	return (((struct ifnet *)ifp)->if_hw_tsomax);
+	return (ifp->if_hw_tsomax);
 }
 
 u_int
 if_gethwtsomaxsegcount(const if_t ifp)
 {
-
-	return (((struct ifnet *)ifp)->if_hw_tsomaxsegcount);
+	return (ifp->if_hw_tsomaxsegcount);
 }
 
 u_int
 if_gethwtsomaxsegsize(const if_t ifp)
 {
-
-	return (((struct ifnet *)ifp)->if_hw_tsomaxsegsize);
+	return (ifp->if_hw_tsomaxsegsize);
 }
 
 void
 if_setinitfn(if_t ifp, if_init_fn_t init_fn)
 {
-	((struct ifnet *)ifp)->if_init = init_fn;
+	ifp->if_init = init_fn;
 }
 
 void
 if_setinputfn(if_t ifp, if_input_fn_t input_fn)
 {
-	((struct ifnet *)ifp)->if_input = input_fn;
+	ifp->if_input = input_fn;
 }
 
 if_input_fn_t
@@ -4863,19 +4836,19 @@
 void
 if_setioctlfn(if_t ifp, if_ioctl_fn_t ioctl_fn)
 {
-	((struct ifnet *)ifp)->if_ioctl = (void *)ioctl_fn;
+	ifp->if_ioctl = ioctl_fn;
 }
 
 void
 if_setoutputfn(if_t ifp, if_output_fn_t output_fn)
 {
-	((struct ifnet *)ifp)->if_output = output_fn;
+	ifp->if_output = output_fn;
 }
 
 void
 if_setstartfn(if_t ifp, if_start_fn_t start_fn)
 {
-	((struct ifnet *)ifp)->if_start = (void *)start_fn;
+	ifp->if_start = start_fn;
 }
 
 if_start_fn_t
@@ -4887,7 +4860,7 @@
 void
 if_settransmitfn(if_t ifp, if_transmit_fn_t start_fn)
 {
-	((struct ifnet *)ifp)->if_transmit = start_fn;
+	ifp->if_transmit = start_fn;
 }
 
 if_transmit_fn_t
@@ -4899,21 +4872,19 @@
 void
 if_setqflushfn(if_t ifp, if_qflush_fn_t flush_fn)
 {
-	((struct ifnet *)ifp)->if_qflush = flush_fn;
-
+	ifp->if_qflush = flush_fn;
 }
 
 void
 if_setsndtagallocfn(if_t ifp, if_snd_tag_alloc_t alloc_fn)
 {
-	((struct ifnet *)ifp)->if_snd_tag_alloc = alloc_fn;
+	ifp->if_snd_tag_alloc = alloc_fn;
 }
 
 int
-if_snd_tag_alloc(struct ifnet *ifp, union if_snd_tag_alloc_params *params,
+if_snd_tag_alloc(if_t ifp, union if_snd_tag_alloc_params *params,
     struct m_snd_tag **mstp)
 {
-
 	if (ifp->if_snd_tag_alloc == NULL)
 		return (EOPNOTSUPP);
 	return (ifp->if_snd_tag_alloc(ifp, params, mstp));
@@ -4922,7 +4893,6 @@
 void
 if_setgetcounterfn(if_t ifp, if_get_counter_t fn)
 {
-
 	ifp->if_get_counter = fn;
 }
 
@@ -5062,7 +5032,6 @@
 static void
 if_show_ifnet(struct ifnet *ifp)
 {
-
 	if (ifp == NULL)
 		return;
 	db_printf("%s:\n", ifp->if_xname);
@@ -5112,7 +5081,6 @@
 
 DB_SHOW_COMMAND(ifnet, db_show_ifnet)
 {
-
 	if (!have_addr) {
 		db_printf("usage: show ifnet <struct ifnet *>\n");
 		return;
diff --git a/sys/net/if_var.h b/sys/net/if_var.h
--- a/sys/net/if_var.h
+++ b/sys/net/if_var.h
@@ -633,7 +633,7 @@
 u_int if_gethwtsomaxsegsize(const if_t ifp);
 void if_setnetmapadapter(if_t ifp, struct netmap_adapter *na);
 struct netmap_adapter *if_getnetmapadapter(if_t ifp);
-int if_input(if_t ifp, struct mbuf* sendmp);
+void if_input(if_t ifp, struct mbuf* sendmp);
 int if_sendq_prepend(if_t ifp, struct mbuf *m);
 struct mbuf *if_dequeue(if_t ifp);
 int if_setifheaderlen(if_t ifp, int len);
@@ -648,7 +648,7 @@
 void if_etherbpfmtap(if_t ifp, struct mbuf *m);
 void if_vlancap(if_t ifp);
 int if_transmit(if_t ifp, struct mbuf *m);
-int if_init(if_t ifp, void *ctx);
+void if_init(if_t ifp, void *ctx);
 int if_resolvemulti(if_t ifp, struct sockaddr **, struct sockaddr *);
 uint64_t if_getcounter(if_t ifp, ift_counter counter);
 struct label *if_getmaclabel(if_t ifp);