[src/trunk]: src/sys/netinet6 Style, and remove the 'len' argument from mld_a...

[maxv <maxv%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/8819f79a457f
branches:  trunk
changeset: 829447:8819f79a457f
user:      maxv <maxv%NetBSD.org@localhost>
date:      Thu Feb 01 07:49:19 2018 +0000

description:
Style, and remove the 'len' argument from mld_allocbuf(), it is misleading,
we only want a static struct. Beyond that no functional change.

diffstat:

 sys/netinet6/mld6.c |  46 +++++++++++++++++++++-------------------------
 1 files changed, 21 insertions(+), 25 deletions(-)

diffs (160 lines):

diff -r db9b6bf3577a -r 8819f79a457f sys/netinet6/mld6.c
--- a/sys/netinet6/mld6.c       Thu Feb 01 05:22:01 2018 +0000
+++ b/sys/netinet6/mld6.c       Thu Feb 01 07:49:19 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: mld6.c,v 1.90 2017/11/17 07:37:12 ozaki-r Exp $        */
+/*     $NetBSD: mld6.c,v 1.91 2018/02/01 07:49:19 maxv Exp $   */
 /*     $KAME: mld6.c,v 1.25 2001/01/16 14:14:18 itojun Exp $   */
 
 /*
@@ -102,7 +102,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: mld6.c,v 1.90 2017/11/17 07:37:12 ozaki-r Exp $");
+__KERNEL_RCSID(0, "$NetBSD: mld6.c,v 1.91 2018/02/01 07:49:19 maxv Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_inet.h"
@@ -153,8 +153,7 @@
 static void mld_start_listening(struct in6_multi *);
 static void mld_stop_listening(struct in6_multi *);
 
-static struct mld_hdr * mld_allocbuf(struct mbuf **, int, struct in6_multi *,
-       int);
+static struct mld_hdr *mld_allocbuf(struct mbuf **, struct in6_multi *, int);
 static void mld_sendpkt(struct in6_multi *, int, const struct in6_addr *);
 static void mld_starttimer(struct in6_multi *);
 static void mld_stoptimer(struct in6_multi *);
@@ -367,8 +366,9 @@
                goto out_nodrop;
        }
 
+       ip6 = mtod(m, struct ip6_hdr *);
+
        /* source address validation */
-       ip6 = mtod(m, struct ip6_hdr *);/* in case mpullup */
        if (!IN6_IS_ADDR_LINKLOCAL(&ip6->ip6_src)) {
                /*
                 * RFC3590 allows the IPv6 unspecified address as the source
@@ -414,7 +414,7 @@
         *
         * In Non-Listener state, we simply don't have a membership record.
         * In Delaying Listener state, our timer is running (in6m->in6m_timer)
-        * In Idle Listener state, our timer is not running 
+        * In Idle Listener state, our timer is not running
         * (in6m->in6m_timer==IN6M_TIMER_UNDEF)
         *
         * The flag is in6m->in6m_state, it is set to MLD_OTHERLISTENER if
@@ -548,8 +548,7 @@
  * returning to avoid locking against myself in ip6_output.
  */
 static void
-mld_sendpkt(struct in6_multi *in6m, int type, 
-       const struct in6_addr *dst)
+mld_sendpkt(struct in6_multi *in6m, int type, const struct in6_addr *dst)
 {
        struct mbuf *mh;
        struct mld_hdr *mldh;
@@ -582,7 +581,7 @@
        }
 
        /* Allocate two mbufs to store IPv6 header and MLD header */
-       mldh = mld_allocbuf(&mh, sizeof(struct mld_hdr), in6m, type);
+       mldh = mld_allocbuf(&mh, in6m, type);
        if (mldh == NULL) {
                ia6_release(ia, &psref);
                curlwp_bindx(bound);
@@ -590,9 +589,9 @@
        }
 
        /* fill src/dst here */
-       ip6 = mtod(mh, struct ip6_hdr *);
-       ip6->ip6_src = ia ? ia->ia_addr.sin6_addr : in6addr_any;
-       ip6->ip6_dst = dst ? *dst : in6m->in6m_addr;
+       ip6 = mtod(mh, struct ip6_hdr *);
+       ip6->ip6_src = ia ? ia->ia_addr.sin6_addr : in6addr_any;
+       ip6->ip6_dst = dst ? *dst : in6m->in6m_addr;
        ia6_release(ia, &psref);
        curlwp_bindx(bound);
 
@@ -612,7 +611,7 @@
         */
        im6o.im6o_multicast_loop = (ip6_mrouter != NULL);
 
-       /* increment output statictics */
+       /* increment output statistics */
        ICMP6_STATINC(ICMP6_STAT_OUTHIST + type);
        icmp6_ifstat_inc(ifp, ifs6_out_msg);
        switch (type) {
@@ -637,8 +636,7 @@
 }
 
 static struct mld_hdr *
-mld_allocbuf(struct mbuf **mh, int len, struct in6_multi *in6m,
-    int type)
+mld_allocbuf(struct mbuf **mh, struct in6_multi *in6m, int type)
 {
        struct mbuf *md;
        struct mld_hdr *mldh;
@@ -662,7 +660,7 @@
        md->m_next = NULL;
 
        m_reset_rcvif((*mh));
-       (*mh)->m_pkthdr.len = sizeof(struct ip6_hdr) + len;
+       (*mh)->m_pkthdr.len = sizeof(struct ip6_hdr) + sizeof(struct mld_hdr);
        (*mh)->m_len = sizeof(struct ip6_hdr);
        MH_ALIGN(*mh, sizeof(struct ip6_hdr));
 
@@ -678,9 +676,9 @@
        /* ip6_src/dst will be set by mld_sendpkt() or mld_sendbuf() */
 
        /* fill in the MLD header as much as possible */
-       md->m_len = len;
+       md->m_len = sizeof(struct mld_hdr);
        mldh = mtod(md, struct mld_hdr *);
-       memset(mldh, 0, len);
+       memset(mldh, 0, sizeof(struct mld_hdr));
        mldh->mld_type = type;
        return mldh;
 }
@@ -706,8 +704,8 @@
  * Add an address to the list of IP6 multicast addresses for a given interface.
  */
 struct in6_multi *
-in6_addmulti(struct in6_addr *maddr6, struct ifnet *ifp, 
-       int *errorp, int timer)
+in6_addmulti(struct in6_addr *maddr6, struct ifnet *ifp, int *errorp,
+    int timer)
 {
        struct  sockaddr_in6 sin6;
        struct  in6_multi *in6m;
@@ -721,7 +719,7 @@
        in6m = in6_lookup_multi(maddr6, ifp);
        if (in6m != NULL) {
                /*
-                * Found it; just increment the refrence count.
+                * Found it; just increment the reference count.
                 */
                in6m->in6m_refcount++;
        } else {
@@ -729,8 +727,7 @@
                 * New address; allocate a new multicast record
                 * and link it into the interface's multicast list.
                 */
-               in6m = (struct in6_multi *)
-                       malloc(sizeof(*in6m), M_IPMADDR, M_NOWAIT|M_ZERO);
+               in6m = malloc(sizeof(*in6m), M_IPMADDR, M_NOWAIT|M_ZERO);
                if (in6m == NULL) {
                        *errorp = ENOBUFS;
                        goto out;
@@ -922,8 +919,7 @@
 }
 
 struct in6_multi_mship *
-in6_joingroup(struct ifnet *ifp, struct in6_addr *addr, 
-       int *errorp, int timer)
+in6_joingroup(struct ifnet *ifp, struct in6_addr *addr, int *errorp, int timer)
 {
        struct in6_multi_mship *imm;