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KAME 4th patch

Browse source 
IPv6 specific library functions addition.
(getnameinfo(), getaddrinfo(), and IPv6 transport support is not yet)

Reviewed by: freebsd-arch, cvs-committers
Obtained from: KAME project
This commit is contained in:
Yoshinobu Inoue 1999-12-16 18:32:01 +00:00
parent a031bda24e
commit 05a244b407
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=54696
6 changed files with 1088 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

12
lib/libc/net/Makefile.inc
View file

@ -8,14 +8,16 @@ SRCS+= addr2ascii.c ascii2addr.c base64.c ether_addr.c \
gethostbydns.c gethostbyht.c gethostbynis.c gethostnamadr.c \
getnetbydns.c getnetbyht.c getnetbynis.c getnetnamadr.c \
getproto.c getprotoent.c getprotoname.c getservbyname.c \
getservbyport.c getservent.c herror.c inet_addr.c inet_lnaof.c \
getservbyport.c getservent.c herror.c inet_addr.c ifname.c \
inet_lnaof.c \
inet_makeaddr.c inet_net_ntop.c inet_net_pton.c inet_neta.c \
inet_netof.c inet_network.c inet_ntoa.c inet_ntop.c \
inet_pton.c linkaddr.c map_v4v6.c ns_addr.c ns_name.c ns_netint.c \
inet_pton.c ip6opt.c linkaddr.c map_v4v6.c ns_addr.c \
ns_name.c ns_netint.c \
ns_ntoa.c ns_parse.c ns_print.c ns_ttl.c nsap_addr.c \
rcmd.c recv.c res_comp.c res_data.c res_debug.c \
res_init.c res_mkquery.c res_mkupdate.c res_query.c res_send.c \
res_update.c send.c
res_update.c rthdr.c send.c vars.c
# not supported: iso_addr.c
# machine-dependent net sources
@ -23,7 +25,7 @@ SRCS+= addr2ascii.c ascii2addr.c base64.c ether_addr.c \
.if ${LIB} == "c"
MAN3+= addr2ascii.3 byteorder.3 ethers.3 gethostbyname.3 \
getnetent.3 getprotoent.3 getservent.3 \
getnetent.3 getprotoent.3 getservent.3 if_indextoname.3 \
inet.3 linkaddr.3 rcmd.3 resolver.3
# not installed: iso_addr.3 ns.3
@ -46,6 +48,8 @@ MLINKS+=inet.3 addr.3 inet.3 inet_addr.3 inet.3 inet_aton.3 \
inet.3 inet_lnaof.3 inet.3 inet_makeaddr.3 inet.3 inet_netof.3 \
inet.3 inet_network.3 inet.3 inet_ntoa.3 inet.3 network.3 \
inet.3 ntoa.3
MLINKS+=if_indextoname.3 if_nametoindex.3 if_indextoname.3 if_nameindex.3 \
if_indextoname.3 if_freenameindex.3
MLINKS+=linkaddr.3 link_addr.3 linkaddr.3 link_ntoa.3
#MLINKS+=ns.3 ns_addr.3 ns.3 ns_ntoa.3
MLINKS+=rcmd.3 iruserok.3 rcmd.3 rresvport.3 rcmd.3 ruserok.3

142
lib/libc/net/if_indextoname.3 Normal file
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@ -0,0 +1,142 @@
.\" Copyright (c) 1983, 1991, 1993
.\" The Regents of the University of California. All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\" must display the following acknowledgement:
.\" This product includes software developed by the University of
.\" California, Berkeley and its contributors.
.\" 4. Neither the name of the University nor the names of its contributors
.\" may be used to endorse or promote products derived from this software
.\" without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" From: @(#)rcmd.3 8.1 (Berkeley) 6/4/93
.\" $FreeBSD$
.\"
.Dd May 21, 1998
.Dt IF_NAMETOINDEX 3
.Os KAME
.Sh NAME
.Nm if_nametoindex ,
.Nm if_indextoname ,
.Nm if_nameindex ,
.Nm if_freenameindex
.Nd convert interface index to name, and vice versa
.Sh SYNOPSIS
.Fd #include <net/if.h>
.Ft "unsigned int"
.Fn if_nametoindex "const char *ifname"
.Ft "char *"
.Fn if_indextoname "unsigned int ifindex" "char *ifname"
.Ft "struct if_nameindex *"
.Fn if_nameindex "void"
.Ft "void"
.Fn if_freenameindex "struct if_nameindex *ptr"
.Sh DESCRIPTION
The functions map interface index to readable interface name
.Po
such as
.Li ``lo0''
.Pc
, and vice versa.
.Pp
.Fn if_nametoindex
converts readable interface name to interface index
.Pp positive integer value .
If the specified interface does not exist, 0 will be returned.
.Pp
.Fn if_indextoname
converts interface index to readable interface name.
The
.Fa ifname
argument must point to a buffer of at least
.Dv IF_NAMESIZE
bytes into which the interface name corresponding to the specified index is
returned.
.Po
.Dv IF_NAMESIZE
is also defined in
.Li <net/if.h>
and its value includes a terminating null byte at the end of the
interface name.
.Pc
This pointer is also the return value of the function.
If there is no interface corresponding to the specified index,
.Dv NULL
is returned.
.Pp
.Fn if_nameindex
returns an array of
.Fa if_nameindex
structures.
.Fa if_nametoindex
is also defined in
.Li <net/if.h> ,
and is as follows:
.Bd -literal -offset
struct if_nameindex {
unsigned int if_index; /* 1, 2, ... */
char *if_name; /* null terminated name: "le0", ... */
};
.Ed
.Pp
The end of the array of structures is indicated by a structure with
an
.Fa if_index
of 0 and an
.Fa if_name
of
.Dv NULL .
The function returns a
.Dv NULL
pointer upon an error.
The memory used for this array of structures along with the interface
names pointed to by the
.Fa if_name
members is obtained dynamically.
This memory is freed by the
.Fn if_freenameindex
function.
.Pp
.Fn if_freenameindex
takes a pointer that was returned by
.Fn if_nameindex
as argument
.Pq Fa ptr ,
and it reclaims the region allocated.
.Sh DIAGNOSTICS
.Fn if_nametoindex
returns 0 on error, positive integer on success.
.Fn if_indextoname
and
.Fn if_nameindex
return
.Dv NULL
on errors.
.Sh SEE ALSO
R. Gilligan, S. Thomson, J. Bound, and W. Stevens,
``Basic Socket Interface Extensions for IPv6,'' RFC2553, March 1999.
.Sh HISTORY
The implementation first appeared in WIDE Hydrangea IPv6 protocol stack kit.
.Sh STANDARDS
These functions are defined in ``Basic Socket Interface Extensions for IPv6''
.Pq RFC2533 .

212
lib/libc/net/ifname.c Normal file
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@ -0,0 +1,212 @@
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
/*
* TODO:
* - prototype defs into arpa/inet.h, not net/if.h (bsd-api-new-02)
*/
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <net/if.h>
#include <net/route.h>
#include <net/if_dl.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#define ROUNDUP(a) \
((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
unsigned int
if_nametoindex(ifname)
const char *ifname;
{
struct if_nameindex *iff = if_nameindex(), *ifx;
int ret;
if (iff == NULL) return 0;
ifx = iff;
while (ifx->if_name != NULL) {
if (strcmp(ifx->if_name, ifname) == 0) {
ret = ifx->if_index;
if_freenameindex(iff);
return ret;
}
ifx++;
}
if_freenameindex(iff);
errno = ENXIO;
return 0;
}
char *
if_indextoname(ifindex, ifname)
unsigned int ifindex;
char *ifname; /* at least IF_NAMESIZE */
{
struct if_nameindex *iff = if_nameindex(), *ifx;
char *cp, *dp;
if (iff == NULL) return NULL;
ifx = iff;
while (ifx->if_index != 0) {
if (ifx->if_index == ifindex) {
cp = ifname;
dp = ifx->if_name;
while ((*cp++ = *dp++)) ;
if_freenameindex(iff);
return (ifname);
}
ifx++;
}
if_freenameindex(iff);
errno = ENXIO;
return NULL;
}
struct if_nameindex *
if_nameindex()
{
size_t needed;
int mib[6], i, ifn = 0, off = 0, hlen;
char *buf = NULL, *lim, *next, *cp, *ifbuf = NULL;
struct rt_msghdr *rtm;
struct if_msghdr *ifm;
struct sockaddr *sa;
struct sockaddr_dl *sdl;
struct if_nameindex *ret = NULL;
static int ifxs = 64; /* initial upper limit */
struct _ifx {
int if_index;
int if_off;
} *ifx = NULL;
mib[0] = CTL_NET;
mib[1] = PF_ROUTE;
mib[2] = 0; /* protocol */
mib[3] = 0; /* wildcard address family */
mib[4] = NET_RT_IFLIST;
mib[5] = 0; /* no flags */
if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
return NULL;
if ((buf = malloc(needed)) == NULL) {
errno = ENOMEM;
goto end;
}
/* XXX: we may have allocated too much than necessary */
if ((ifbuf = malloc(needed)) == NULL) {
errno = ENOMEM;
goto end;
}
if ((ifx = (struct _ifx *)malloc(sizeof(*ifx) * ifxs)) == NULL) {
errno = ENOMEM;
goto end;
}
if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
/* sysctl has set errno */
goto end;
}
lim = buf + needed;
for (next = buf; next < lim; next += rtm->rtm_msglen) {
rtm = (struct rt_msghdr *)next;
if (rtm->rtm_version != RTM_VERSION) {
errno = EPROTONOSUPPORT;
goto end;
}
switch (rtm->rtm_type) {
case RTM_IFINFO:
ifm = (struct if_msghdr *)rtm;
ifx[ifn].if_index = ifm->ifm_index;
ifx[ifn].if_off = off;
cp = (char *)(ifm + 1);
for (i = 1; i; i <<= 1) {
if (i & ifm->ifm_addrs) {
sa = (struct sockaddr *)cp;
if (i == RTA_IFP &&
sa->sa_family == AF_LINK) {
sdl = (struct sockaddr_dl *)sa;
memcpy(ifbuf + off,
sdl->sdl_data,
sdl->sdl_nlen);
off += sdl->sdl_nlen;
*(ifbuf + off) = '\0';
off++;
}
ADVANCE(cp, sa);
}
}
if (++ifn == ifxs) {
/* we need more memory */
struct _ifx *newifx;
ifxs *= 2;
if ((newifx = (struct _ifx *)malloc(sizeof(*newifx) * ifxs)) == NULL) {
errno = ENOMEM;
goto end;
}
/* copy and free old data */
memcpy(newifx, ifx, (sizeof(*ifx) * ifxs) / 2);
free(ifx);
ifx = newifx;
}
}
}
hlen = sizeof(struct if_nameindex) * (ifn + 1);
if ((cp = (char *)malloc(hlen + off)) == NULL) {
errno = ENOMEM;
goto end;
}
bcopy(ifbuf, cp + hlen, off);
ret = (struct if_nameindex *)cp;
for (i = 0; i < ifn; i++) {
ret[i].if_index = ifx[i].if_index;
ret[i].if_name = cp + hlen + ifx[i].if_off;
}
ret[ifn].if_index = 0;
ret[ifn].if_name = NULL;
end:
if (buf) free(buf);
if (ifbuf) free(ifbuf);
if (ifx) free(ifx);
return ret;
}
void if_freenameindex(ptr)
struct if_nameindex *ptr;
{
free(ptr);
}

386
lib/libc/net/ip6opt.c Normal file
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@ -0,0 +1,386 @@
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/ip6.h>
#include <string.h>
#include <stdio.h>
static int ip6optlen(u_int8_t *opt, u_int8_t *lim);
static void inet6_insert_padopt(u_char *p, int len);
/*
* This function returns the number of bytes required to hold an option
* when it is stored as ancillary data, including the cmsghdr structure
* at the beginning, and any padding at the end (to make its size a
* multiple of 8 bytes). The argument is the size of the structure
* defining the option, which must include any pad bytes at the
* beginning (the value y in the alignment term "xn + y"), the type
* byte, the length byte, and the option data.
*/
int
inet6_option_space(nbytes)
int nbytes;
{
nbytes += 2; /* we need space for nxt-hdr and length fields */
return(CMSG_SPACE((nbytes + 7) & ~7));
}
/*
* This function is called once per ancillary data object that will
* contain either Hop-by-Hop or Destination options. It returns 0 on
* success or -1 on an error.
*/
int
inet6_option_init(bp, cmsgp, type)
void *bp;
struct cmsghdr **cmsgp;
int type;
{
register struct cmsghdr *ch = (struct cmsghdr *)bp;
/* argument validation */
if (type != IPV6_HOPOPTS && type != IPV6_DSTOPTS)
return(-1);
ch->cmsg_level = IPPROTO_IPV6;
ch->cmsg_type = type;
ch->cmsg_len = CMSG_LEN(0);
*cmsgp = ch;
return(0);
}
/*
* This function appends a Hop-by-Hop option or a Destination option
* into an ancillary data object that has been initialized by
* inet6_option_init(). This function returns 0 if it succeeds or -1 on
* an error.
* multx is the value x in the alignment term "xn + y" described
* earlier. It must have a value of 1, 2, 4, or 8.
* plusy is the value y in the alignment term "xn + y" described
* earlier. It must have a value between 0 and 7, inclusive.
*/
int
inet6_option_append(cmsg, typep, multx, plusy)
struct cmsghdr *cmsg;
const u_int8_t *typep;
int multx;
int plusy;
{
int padlen, optlen, off;
register u_char *bp = (u_char *)cmsg + cmsg->cmsg_len;
struct ip6_ext *eh = (struct ip6_ext *)CMSG_DATA(cmsg);
/* argument validation */
if (multx != 1 && multx != 2 && multx != 4 && multx != 8)
return(-1);
if (plusy < 0 || plusy > 7)
return(-1);
if (typep[0] > 255)
return(-1);
/*
* If this is the first option, allocate space for the
* first 2 bytes(for next header and length fields) of
* the option header.
*/
if (bp == (u_char *)eh) {
bp += 2;
cmsg->cmsg_len += 2;
}
/* calculate pad length before the option. */
off = bp - (u_char *)eh;
padlen = (((off % multx) + (multx - 1)) & ~(multx - 1)) -
(off % multx);
padlen += plusy;
/* insert padding */
inet6_insert_padopt(bp, padlen);
cmsg->cmsg_len += padlen;
bp += padlen;
/* copy the option */
if (typep[0] == IP6OPT_PAD1)
optlen = 1;
else
optlen = typep[1] + 2;
memcpy(bp, typep, optlen);
bp += optlen;
cmsg->cmsg_len += optlen;
/* calculate pad length after the option and insert the padding */
off = bp - (u_char *)eh;
padlen = ((off + 7) & ~7) - off;
inet6_insert_padopt(bp, padlen);
bp += padlen;
cmsg->cmsg_len += padlen;
/* update the length field of the ip6 option header */
eh->ip6e_len = ((bp - (u_char *)eh) >> 3) - 1;
return(0);
}
/*
* This function appends a Hop-by-Hop option or a Destination option
* into an ancillary data object that has been initialized by
* inet6_option_init(). This function returns a pointer to the 8-bit
* option type field that starts the option on success, or NULL on an
* error.
* The difference between this function and inet6_option_append() is
* that the latter copies the contents of a previously built option into
* the ancillary data object while the current function returns a
* pointer to the space in the data object where the option's TLV must
* then be built by the caller.
*
*/
u_int8_t *
inet6_option_alloc(cmsg, datalen, multx, plusy)
struct cmsghdr *cmsg;
int datalen;
int multx;
int plusy;
{
int padlen, off;
register u_int8_t *bp = (u_char *)cmsg + cmsg->cmsg_len;
u_int8_t *retval;
struct ip6_ext *eh = (struct ip6_ext *)CMSG_DATA(cmsg);
/* argument validation */
if (multx != 1 && multx != 2 && multx != 4 && multx != 8)
return(NULL);
if (plusy < 0 || plusy > 7)
return(NULL);
/*
* If this is the first option, allocate space for the
* first 2 bytes(for next header and length fields) of
* the option header.
*/
if (bp == (u_char *)eh) {
bp += 2;
cmsg->cmsg_len += 2;
}
/* calculate pad length before the option. */
off = bp - (u_char *)eh;
padlen = (((off % multx) + (multx - 1)) & ~(multx - 1)) -
(off % multx);
padlen += plusy;
/* insert padding */
inet6_insert_padopt(bp, padlen);
cmsg->cmsg_len += padlen;
bp += padlen;
/* keep space to store specified length of data */
retval = bp;
bp += datalen;
cmsg->cmsg_len += datalen;
/* calculate pad length after the option and insert the padding */
off = bp - (u_char *)eh;
padlen = ((off + 7) & ~7) - off;
inet6_insert_padopt(bp, padlen);
bp += padlen;
cmsg->cmsg_len += padlen;
/* update the length field of the ip6 option header */
eh->ip6e_len = ((bp - (u_char *)eh) >> 3) - 1;
return(retval);
}
/*
* This function processes the next Hop-by-Hop option or Destination
* option in an ancillary data object. If another option remains to be
* processed, the return value of the function is 0 and *tptrp points to
* the 8-bit option type field (which is followed by the 8-bit option
* data length, followed by the option data). If no more options remain
* to be processed, the return value is -1 and *tptrp is NULL. If an
* error occurs, the return value is -1 and *tptrp is not NULL.
* (RFC 2292, 6.3.5)
*/
int
inet6_option_next(cmsg, tptrp)
const struct cmsghdr *cmsg;
u_int8_t **tptrp;
{
struct ip6_ext *ip6e;
int hdrlen, optlen;
u_int8_t *lim;
if (cmsg->cmsg_level != IPPROTO_IPV6 ||
(cmsg->cmsg_type != IPV6_HOPOPTS &&
cmsg->cmsg_type != IPV6_DSTOPTS))
return(-1);
/* message length validation */
if (cmsg->cmsg_len < CMSG_SPACE(sizeof(struct ip6_ext)))
return(-1);
ip6e = (struct ip6_ext *)CMSG_DATA(cmsg);
hdrlen = (ip6e->ip6e_len + 1) << 3;
if (cmsg->cmsg_len < CMSG_SPACE(hdrlen))
return(-1);
/*
* If the caller does not specify the starting point,
* simply return the 1st option.
* Otherwise, search the option list for the next option.
*/
lim = (u_int8_t *)ip6e + hdrlen;
if (*tptrp == NULL)
*tptrp = (u_int8_t *)(ip6e + 1);
else {
if ((optlen = ip6optlen(*tptrp, lim)) == 0)
return(-1);
*tptrp = *tptrp + optlen;
}
if (*tptrp >= lim) { /* there is no option */
*tptrp = NULL;
return(-1);
}
/*
* Finally, checks if the next option is safely stored in the
* cmsg data.
*/
if (ip6optlen(*tptrp, lim) == 0)
return(-1);
else
return(0);
}
/*
* This function is similar to the inet6_option_next() function,
* except this function lets the caller specify the option type to be
* searched for, instead of always returning the next option in the
* ancillary data object.
* Note: RFC 2292 says the type of tptrp is u_int8_t *, but we think
* it's a typo. The variable should be type of u_int8_t **.
*/
int
inet6_option_find(cmsg, tptrp, type)
const struct cmsghdr *cmsg;
u_int8_t **tptrp;
int type;
{
struct ip6_ext *ip6e;
int hdrlen, optlen;
u_int8_t *optp, *lim;
if (cmsg->cmsg_level != IPPROTO_IPV6 ||
(cmsg->cmsg_type != IPV6_HOPOPTS &&
cmsg->cmsg_type != IPV6_DSTOPTS))
return(-1);
/* message length validation */
if (cmsg->cmsg_len < CMSG_SPACE(sizeof(struct ip6_ext)))
return(-1);
ip6e = (struct ip6_ext *)CMSG_DATA(cmsg);
hdrlen = (ip6e->ip6e_len + 1) << 3;
if (cmsg->cmsg_len < CMSG_SPACE(hdrlen))
return(-1);
/*
* If the caller does not specify the starting point,
* search from the beginning of the option list.
* Otherwise, search from *the next option* of the specified point.
*/
lim = (u_int8_t *)ip6e + hdrlen;
if (*tptrp == NULL)
*tptrp = (u_int8_t *)(ip6e + 1);
else {
if ((optlen = ip6optlen(*tptrp, lim)) == 0)
return(-1);
*tptrp = *tptrp + optlen;
}
for (optp = *tptrp; optp < lim; optp += optlen) {
if (*optp == type) {
*tptrp = optp;
return(0);
}
if ((optlen = ip6optlen(optp, lim)) == 0)
return(-1);
}
/* search failed */
*tptrp = NULL;
return(-1);
}
/*
* Calculate the length of a given IPv6 option. Also checks
* if the option is safely stored in user's buffer according to the
* calculated length and the limitation of the buffer.
*/
static int
ip6optlen(opt, lim)
u_int8_t *opt, *lim;
{
int optlen;
if (*opt == IP6OPT_PAD1)
optlen = 1;
else {
/* is there enough space to store type and len? */
if (opt + 2 > lim)
return(0);
optlen = *(opt + 1) + 2;
}
if (opt + optlen <= lim)
return(optlen);
return(0);
}
static void
inet6_insert_padopt(u_char *p, int len)
{
switch(len) {
case 0:
return;
case 1:
p[0] = IP6OPT_PAD1;
return;
default:
p[0] = IP6OPT_PADN;
p[1] = len - 2;
memset(&p[2], 0, len - 2);
return;
}
}

298
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/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/ip6.h>
#include <string.h>
#include <stdio.h>
size_t
inet6_rthdr_space(type, seg)
int type, seg;
{
switch(type) {
case IPV6_RTHDR_TYPE_0:
if (seg < 1 || seg > 23)
return(0);
return(CMSG_SPACE(sizeof(struct in6_addr) * (seg - 1)
+ sizeof(struct ip6_rthdr0)));
default:
#ifdef DEBUG
fprintf(stderr, "inet6_rthdr_space: unknown type(%d)\n", type);
#endif
return(0);
}
}
struct cmsghdr *
inet6_rthdr_init(bp, type)
void *bp;
int type;
{
register struct cmsghdr *ch = (struct cmsghdr *)bp;
register struct ip6_rthdr *rthdr = (struct ip6_rthdr *)(ch + 1);
ch->cmsg_level = IPPROTO_IPV6;
ch->cmsg_type = IPV6_RTHDR;
switch(type) {
case IPV6_RTHDR_TYPE_0:
ch->cmsg_len = CMSG_LEN(sizeof(struct ip6_rthdr0) - sizeof(struct in6_addr));
bzero(rthdr, sizeof(struct ip6_rthdr0));
rthdr->ip6r_type = IPV6_RTHDR_TYPE_0;
return(ch);
default:
#ifdef DEBUG
fprintf(stderr, "inet6_rthdr_init: unknown type(%d)\n", type);
#endif
return(NULL);
}
}
int
inet6_rthdr_add(cmsg, addr, flags)
struct cmsghdr *cmsg;
const struct in6_addr *addr;
u_int flags;
{
register struct ip6_rthdr *rthdr = (struct ip6_rthdr *)(cmsg + 1);
switch(rthdr->ip6r_type) {
case IPV6_RTHDR_TYPE_0:
{
struct ip6_rthdr0 *rt0 = (struct ip6_rthdr0 *)rthdr;
if (flags != IPV6_RTHDR_LOOSE && flags != IPV6_RTHDR_STRICT) {
#ifdef DEBUG
fprintf(stderr, "inet6_rthdr_add: unsupported flag(%d)\n", flags);
#endif
return(-1);
}
if (rt0->ip6r0_segleft == 23) {
#ifdef DEBUG
fprintf(stderr, "inet6_rthdr_add: segment overflow\n");
#endif
return(-1);
}
if (flags == IPV6_RTHDR_STRICT) {
int c, b;
c = rt0->ip6r0_segleft / 8;
b = rt0->ip6r0_segleft % 8;
rt0->ip6r0_slmap[c] |= (1 << (7 - b));
}
rt0->ip6r0_segleft++;
bcopy(addr, (caddr_t)rt0 + ((rt0->ip6r0_len + 1) << 3),
sizeof(struct in6_addr));
rt0->ip6r0_len += sizeof(struct in6_addr) >> 3;
cmsg->cmsg_len = CMSG_LEN((rt0->ip6r0_len + 1) << 3);
break;
}
default:
#ifdef DEBUG
fprintf(stderr, "inet6_rthdr_add: unknown type(%d)\n",
rthdr->ip6r_type);
#endif
return(-1);
}
return(0);
}
int
inet6_rthdr_lasthop(cmsg, flags)
struct cmsghdr *cmsg;
unsigned int flags;
{
register struct ip6_rthdr *rthdr = (struct ip6_rthdr *)(cmsg + 1);
switch(rthdr->ip6r_type) {
case IPV6_RTHDR_TYPE_0:
{
struct ip6_rthdr0 *rt0 = (struct ip6_rthdr0 *)rthdr;
if (flags != IPV6_RTHDR_LOOSE && flags != IPV6_RTHDR_STRICT) {
#ifdef DEBUG
fprintf(stderr, "inet6_rthdr_lasthop: unsupported flag(%d)\n", flags);
#endif
return(-1);
}
if (rt0->ip6r0_segleft > 23) {
#ifdef DEBUG
fprintf(stderr, "inet6_rthdr_add: segment overflow\n");
#endif
return(-1);
}
if (flags == IPV6_RTHDR_STRICT) {
int c, b;
c = rt0->ip6r0_segleft / 8;
b = rt0->ip6r0_segleft % 8;
rt0->ip6r0_slmap[c] |= (1 << (7 - b));
}
break;
}
default:
#ifdef DEBUG
fprintf(stderr, "inet6_rthdr_lasthop: unknown type(%d)\n",
rthdr->ip6r_type);
#endif
return(-1);
}
return(0);
}
#if 0
int
inet6_rthdr_reverse(in, out)
const struct cmsghdr *in;
struct cmsghdr *out;
{
#ifdef DEBUG
fprintf(stderr, "inet6_rthdr_reverse: not implemented yet\n");
#endif
return -1;
}
#endif
int
inet6_rthdr_segments(cmsg)
const struct cmsghdr *cmsg;
{
register struct ip6_rthdr *rthdr = (struct ip6_rthdr *)(cmsg + 1);
switch(rthdr->ip6r_type) {
case IPV6_RTHDR_TYPE_0:
{
struct ip6_rthdr0 *rt0 = (struct ip6_rthdr0 *)rthdr;
if (rt0->ip6r0_len % 2 || 46 < rt0->ip6r0_len) {
#ifdef DEBUG
fprintf(stderr, "inet6_rthdr_segments: invalid size(%d)\n",
rt0->ip6r0_len);
#endif
return -1;
}
return (rt0->ip6r0_len * 8) / sizeof(struct in6_addr);
}
default:
#ifdef DEBUG
fprintf(stderr, "inet6_rthdr_segments: unknown type(%d)\n",
rthdr->ip6r_type);
#endif
return -1;
}
}
struct in6_addr *
inet6_rthdr_getaddr(cmsg, index)
struct cmsghdr *cmsg;
int index;
{
register struct ip6_rthdr *rthdr = (struct ip6_rthdr *)(cmsg + 1);
switch(rthdr->ip6r_type) {
case IPV6_RTHDR_TYPE_0:
{
struct ip6_rthdr0 *rt0 = (struct ip6_rthdr0 *)rthdr;
int naddr;
if (rt0->ip6r0_len % 2 || 46 < rt0->ip6r0_len) {
#ifdef DEBUG
fprintf(stderr, "inet6_rthdr_getaddr: invalid size(%d)\n",
rt0->ip6r0_len);
#endif
return NULL;
}
naddr = (rt0->ip6r0_len * 8) / sizeof(struct in6_addr);
if (index <= 0 || naddr < index) {
#ifdef DEBUG
fprintf(stderr, "inet6_rthdr_getaddr: invalid index(%d)\n", index);
#endif
return NULL;
}
return &rt0->ip6r0_addr[index - 1];
}
default:
#ifdef DEBUG
fprintf(stderr, "inet6_rthdr_getaddr: unknown type(%d)\n",
rthdr->ip6r_type);
#endif
return NULL;
}
}
int
inet6_rthdr_getflags(cmsg, index)
const struct cmsghdr *cmsg;
int index;
{
register struct ip6_rthdr *rthdr = (struct ip6_rthdr *)(cmsg + 1);
switch(rthdr->ip6r_type) {
case IPV6_RTHDR_TYPE_0:
{
struct ip6_rthdr0 *rt0 = (struct ip6_rthdr0 *)rthdr;
int naddr;
if (rt0->ip6r0_len % 2 || 46 < rt0->ip6r0_len) {
#ifdef DEBUG
fprintf(stderr, "inet6_rthdr_getflags: invalid size(%d)\n",
rt0->ip6r0_len);
#endif
return -1;
}
naddr = (rt0->ip6r0_len * 8) / sizeof(struct in6_addr);
if (index < 0 || naddr < index) {
#ifdef DEBUG
fprintf(stderr, "inet6_rthdr_getflags: invalid index(%d)\n", index);
#endif
return -1;
}
if (rt0->ip6r0_slmap[index / 8] & (0x80 >> (index % 8)))
return IPV6_RTHDR_STRICT;
else
return IPV6_RTHDR_LOOSE;
}
default:
#ifdef DEBUG
fprintf(stderr, "inet6_rthdr_getflags: unknown type(%d)\n",
rthdr->ip6r_type);
#endif
return -1;
}
}

42
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/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <sys/types.h>
#include <netinet/in.h>
/*
* Definitions of some costant IPv6 addresses.
*/
const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
const struct in6_addr in6addr_nodelocal_allnodes = IN6ADDR_NODELOCAL_ALLNODES_INIT;
const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT;