| Message ID | 1448796882-316-4-git-send-email-alex.aring@gmail.com |
|---|---|
| State | Awaiting Upstream, archived |
| Delegated to: | David Miller |
| Headers | show |
On Sun, Nov 29, 2015, at 12:34, Alexander Aring wrote: > This patch adds a static inline function ipv6_addr_prefix_copy which > copies a ipv6 address prefix(argument pfx) into the ipv6 address prefix. > The prefix len is given by plen as bits. This function mainly based on > ipv6_addr_prefix which copies one address prefix from address into a new > ipv6 address destination and zero all other address bits. > > The difference is that ipv6_addr_prefix_copy don't get a prefix from an > ipv6 address, it sets a prefix to an ipv6 address with keeping other > address bits. The use case is for context based address compression > inside 6LoWPAN IPHC header which keeping ipv6 prefixes inside a context > table to lookup address-bits without sending them. > > Cc: David S. Miller <davem@davemloft.net> > Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> > Cc: James Morris <jmorris@namei.org> > Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org> > Cc: Patrick McHardy <kaber@trash.net> > Signed-off-by: Alexander Aring <alex.aring@gmail.com> > --- > include/net/ipv6.h | 15 +++++++++++++++ > 1 file changed, 15 insertions(+) > > diff --git a/include/net/ipv6.h b/include/net/ipv6.h > index e1a10b0..cd3881e6 100644 > --- a/include/net/ipv6.h > +++ b/include/net/ipv6.h > @@ -382,6 +382,21 @@ static inline void ipv6_addr_prefix(struct in6_addr > *pfx, > pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b); > } > > +static inline void ipv6_addr_prefix_copy(struct in6_addr *addr, > + const struct in6_addr *pfx, > + int plen) > +{ > + /* caller must guarantee 0 <= plen <= 128 */ > + int o = plen >> 3, > + b = plen & 0x7; > + > + memcpy(addr->s6_addr, pfx, o); > + if (b != 0) { > + addr->s6_addr[o] &= ~(0xff00 >> b); > + addr->s6_addr[o] |= (pfx->s6_addr[o] & (0xff00 >> b)); > + } > +} > + Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hannes Frederic Sowa wrote: > > > On Sun, Nov 29, 2015, at 12:34, Alexander Aring wrote: >> This patch adds a static inline function ipv6_addr_prefix_copy which >> copies a ipv6 address prefix(argument pfx) into the ipv6 address prefix. >> The prefix len is given by plen as bits. This function mainly based on >> ipv6_addr_prefix which copies one address prefix from address into a new >> ipv6 address destination and zero all other address bits. >> >> The difference is that ipv6_addr_prefix_copy don't get a prefix from an >> ipv6 address, it sets a prefix to an ipv6 address with keeping other >> address bits. The use case is for context based address compression >> inside 6LoWPAN IPHC header which keeping ipv6 prefixes inside a context >> table to lookup address-bits without sending them. >> >> Cc: David S. Miller <davem@davemloft.net> >> Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> >> Cc: James Morris <jmorris@namei.org> >> Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org> >> Cc: Patrick McHardy <kaber@trash.net> >> Signed-off-by: Alexander Aring <alex.aring@gmail.com> >> --- >> include/net/ipv6.h | 15 +++++++++++++++ >> 1 file changed, 15 insertions(+) >> >> diff --git a/include/net/ipv6.h b/include/net/ipv6.h >> index e1a10b0..cd3881e6 100644 >> --- a/include/net/ipv6.h >> +++ b/include/net/ipv6.h >> @@ -382,6 +382,21 @@ static inline void ipv6_addr_prefix(struct in6_addr >> *pfx, >> pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b); >> } >> >> +static inline void ipv6_addr_prefix_copy(struct in6_addr *addr, >> + const struct in6_addr *pfx, >> + int plen) >> +{ >> + /* caller must guarantee 0 <= plen <= 128 */ >> + int o = plen >> 3, >> + b = plen & 0x7; >> + >> + memcpy(addr->s6_addr, pfx, o); >> + if (b != 0) { >> + addr->s6_addr[o] &= ~(0xff00 >> b); >> + addr->s6_addr[o] |= (pfx->s6_addr[o] & (0xff00 >> b)); >> + } >> +} >> + > > Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> > -- > To unsubscribe from this list: send the line "unsubscribe netdev" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >
Hello. On 29/11/15 12:34, Alexander Aring wrote: > This patch adds a static inline function ipv6_addr_prefix_copy which > copies a ipv6 address prefix(argument pfx) into the ipv6 address prefix. > The prefix len is given by plen as bits. This function mainly based on > ipv6_addr_prefix which copies one address prefix from address into a new > ipv6 address destination and zero all other address bits. > > The difference is that ipv6_addr_prefix_copy don't get a prefix from an > ipv6 address, it sets a prefix to an ipv6 address with keeping other > address bits. The use case is for context based address compression > inside 6LoWPAN IPHC header which keeping ipv6 prefixes inside a context > table to lookup address-bits without sending them. > > Cc: David S. Miller <davem@davemloft.net> > Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> > Cc: James Morris <jmorris@namei.org> > Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org> > Cc: Patrick McHardy <kaber@trash.net> > Signed-off-by: Alexander Aring <alex.aring@gmail.com> > --- > include/net/ipv6.h | 15 +++++++++++++++ > 1 file changed, 15 insertions(+) > > diff --git a/include/net/ipv6.h b/include/net/ipv6.h > index e1a10b0..cd3881e6 100644 > --- a/include/net/ipv6.h > +++ b/include/net/ipv6.h > @@ -382,6 +382,21 @@ static inline void ipv6_addr_prefix(struct in6_addr *pfx, > pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b); > } > > +static inline void ipv6_addr_prefix_copy(struct in6_addr *addr, > + const struct in6_addr *pfx, > + int plen) > +{ > + /* caller must guarantee 0 <= plen <= 128 */ > + int o = plen >> 3, > + b = plen & 0x7; > + > + memcpy(addr->s6_addr, pfx, o); > + if (b != 0) { > + addr->s6_addr[o] &= ~(0xff00 >> b); > + addr->s6_addr[o] |= (pfx->s6_addr[o] & (0xff00 >> b)); > + } > +} > + > static inline void __ipv6_addr_set_half(__be32 *addr, > __be32 wh, __be32 wl) > { Thanks for taking up the review comments. You can add my r-b now: Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com> regards Stefan Schmidt -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
> -----Original Message----- > From: Alexander Aring [mailto:alex.aring@gmail.com] > Sent: Sunday, November 29, 2015 12:35 > To: linux-wpan@vger.kernel.org > Cc: linux-bluetooth@vger.kernel.org; netdev@vger.kernel.org; > kernel@pengutronix.de; mcr@sandelman.ca; Duda, Lukasz; > martin.gergeleit@hs-rm.de; Alexander Aring; David S . Miller; Alexey > Kuznetsov; James Morris; Hideaki YOSHIFUJI; Patrick McHardy > Subject: [RFCv3 bluetooth-next 3/4] ipv6: add ipv6_addr_prefix_copy > > This patch adds a static inline function ipv6_addr_prefix_copy which copies a > ipv6 address prefix(argument pfx) into the ipv6 address prefix. > The prefix len is given by plen as bits. This function mainly based on > ipv6_addr_prefix which copies one address prefix from address into a new > ipv6 address destination and zero all other address bits. > > The difference is that ipv6_addr_prefix_copy don't get a prefix from an > ipv6 address, it sets a prefix to an ipv6 address with keeping other address > bits. The use case is for context based address compression inside 6LoWPAN > IPHC header which keeping ipv6 prefixes inside a context table to lookup > address-bits without sending them. > > Cc: David S. Miller <davem@davemloft.net> > Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> > Cc: James Morris <jmorris@namei.org> > Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org> > Cc: Patrick McHardy <kaber@trash.net> > Signed-off-by: Alexander Aring <alex.aring@gmail.com> > --- > include/net/ipv6.h | 15 +++++++++++++++ > 1 file changed, 15 insertions(+) > > diff --git a/include/net/ipv6.h b/include/net/ipv6.h index e1a10b0..cd3881e6 > 100644 > --- a/include/net/ipv6.h > +++ b/include/net/ipv6.h > @@ -382,6 +382,21 @@ static inline void ipv6_addr_prefix(struct in6_addr > *pfx, > pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b); } > > +static inline void ipv6_addr_prefix_copy(struct in6_addr *addr, > + const struct in6_addr *pfx, > + int plen) > +{ > + /* caller must guarantee 0 <= plen <= 128 */ > + int o = plen >> 3, > + b = plen & 0x7; > + > + memcpy(addr->s6_addr, pfx, o); > + if (b != 0) { > + addr->s6_addr[o] &= ~(0xff00 >> b); > + addr->s6_addr[o] |= (pfx->s6_addr[o] & (0xff00 >> b)); > + } > +} > + > static inline void __ipv6_addr_set_half(__be32 *addr, > __be32 wh, __be32 wl) > { > -- > 2.6.1 Acked-by: Łukasz Duda <lukasz.duda@nordicsemi.no> -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/include/net/ipv6.h b/include/net/ipv6.h index e1a10b0..cd3881e6 100644 --- a/include/net/ipv6.h +++ b/include/net/ipv6.h @@ -382,6 +382,21 @@ static inline void ipv6_addr_prefix(struct in6_addr *pfx, pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b); } +static inline void ipv6_addr_prefix_copy(struct in6_addr *addr, + const struct in6_addr *pfx, + int plen) +{ + /* caller must guarantee 0 <= plen <= 128 */ + int o = plen >> 3, + b = plen & 0x7; + + memcpy(addr->s6_addr, pfx, o); + if (b != 0) { + addr->s6_addr[o] &= ~(0xff00 >> b); + addr->s6_addr[o] |= (pfx->s6_addr[o] & (0xff00 >> b)); + } +} + static inline void __ipv6_addr_set_half(__be32 *addr, __be32 wh, __be32 wl) {
This patch adds a static inline function ipv6_addr_prefix_copy which copies a ipv6 address prefix(argument pfx) into the ipv6 address prefix. The prefix len is given by plen as bits. This function mainly based on ipv6_addr_prefix which copies one address prefix from address into a new ipv6 address destination and zero all other address bits. The difference is that ipv6_addr_prefix_copy don't get a prefix from an ipv6 address, it sets a prefix to an ipv6 address with keeping other address bits. The use case is for context based address compression inside 6LoWPAN IPHC header which keeping ipv6 prefixes inside a context table to lookup address-bits without sending them. Cc: David S. Miller <davem@davemloft.net> Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> Cc: James Morris <jmorris@namei.org> Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org> Cc: Patrick McHardy <kaber@trash.net> Signed-off-by: Alexander Aring <alex.aring@gmail.com> --- include/net/ipv6.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+)