Ghee Teo writes:
> I wonder has anyone in the networking community is working on
> implementing getifaddrs () on OpenSolaris, either in planning or in the
> pipeline?
> I am porting a gnome application, gnome-nettol which uses this API which
> is available on Linux and BSD. I would prefer not to come up with my own
> hacks in the desktop if someone with networking expertise is coming up
> with a solution soon :)
I don't know if anyone is working to integrate this into an
OpenSolaris library, but I had to create these interfaces when I was
porting over the WIDE DHCPv6 server. I've attached copies of the
resulting source code; you're welcome to them.
For many projects based elsewhere outside of opensolaris.org, I
suspect that having getifaddrs() on OpenSolaris won't help
immediately. Many of those projects have a user base that includes S8
users, so they have to live with local hacks.
--
James Carlson, Solaris Networking <[EMAIL PROTECTED]>
Sun Microsystems / 35 Network Drive 71.232W Vox +1 781 442 2084
MS UBUR02-212 / Burlington MA 01803-2757 42.496N Fax +1 781 442 1677
/*
* Copyright (c) 2006 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.
*/
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/sockio.h>
#include <sys/socket.h>
#include <net/if.h>
#include "ifaddrs.h"
static int
get_lifreq(int fd, struct lifreq **ifr_ret)
{
struct lifnum lifn;
struct lifconf lifc;
struct lifreq *lifrp;
lifn.lifn_family = AF_UNSPEC;
lifn.lifn_flags = 0;
if (ioctl(fd, SIOCGLIFNUM, &lifn) == -1)
lifn.lifn_count = 16;
else
lifn.lifn_count += 16;
for (;;) {
lifc.lifc_len = lifn.lifn_count * sizeof (*lifrp);
lifrp = malloc(lifc.lifc_len);
if (lifrp == NULL)
return (-1);
lifc.lifc_family = AF_UNSPEC;
lifc.lifc_flags = 0;
lifc.lifc_buf = (char *)lifrp;
if (ioctl(fd, SIOCGLIFCONF, &lifc) == -1) {
free(lifrp);
if (errno == EINVAL) {
lifn.lifn_count <<= 1;
continue;
}
(void) close(fd);
return (-1);
}
if (lifc.lifc_len < (lifn.lifn_count - 1) * sizeof (*lifrp))
break;
free(lifrp);
lifn.lifn_count <<= 1;
}
(void) close(fd);
*ifr_ret = lifrp;
return (lifc.lifc_len / sizeof (*lifrp));
}
static size_t
nbytes(const struct lifreq *lifrp, int nlif, size_t socklen)
{
size_t len = 0;
size_t slen;
while (nlif > 0) {
slen = strlen(lifrp->lifr_name) + 1;
len += sizeof (struct ifaddrs) + ((slen + 3) & ~3);
len += 3 * socklen;
lifrp++;
nlif--;
}
return (len);
}
static struct sockaddr *
addrcpy(struct sockaddr_storage *addr, char **bufp)
{
char *buf = *bufp;
size_t len;
len = addr->ss_family == AF_INET ? sizeof (struct sockaddr_in) :
sizeof (struct sockaddr_in6);
(void) memcpy(buf, addr, len);
*bufp = buf + len;
return ((struct sockaddr *)buf);
}
static int
populate(struct ifaddrs *ifa, int fd, struct lifreq *lifrp, int nlif, int af,
char **bufp)
{
char *buf = *bufp;
size_t slen;
while (nlif > 0) {
ifa->ifa_next = (nlif > 1) ? ifa + 1 : NULL;
(void) strcpy(ifa->ifa_name = buf, lifrp->lifr_name);
slen = strlen(lifrp->lifr_name) + 1;
buf += (slen + 3) & ~3;
if (ioctl(fd, SIOCGLIFFLAGS, lifrp) == -1)
ifa->ifa_flags = 0;
else
ifa->ifa_flags = lifrp->lifr_flags;
if (ioctl(fd, SIOCGLIFADDR, lifrp) == -1)
ifa->ifa_addr = NULL;
else
ifa->ifa_addr = addrcpy(&lifrp->lifr_addr, &buf);
if (ioctl(fd, SIOCGLIFNETMASK, lifrp) == -1)
ifa->ifa_netmask = NULL;
else
ifa->ifa_netmask = addrcpy(&lifrp->lifr_addr, &buf);
if (ifa->ifa_flags & IFF_POINTOPOINT) {
if (ioctl(fd, SIOCGLIFDSTADDR, lifrp) == -1)
ifa->ifa_dstaddr = NULL;
else
ifa->ifa_dstaddr =
addrcpy(&lifrp->lifr_dstaddr, &buf);
} else if (ifa->ifa_flags & IFF_BROADCAST) {
if (ioctl(fd, SIOCGLIFBRDADDR, lifrp) == -1)
ifa->ifa_broadaddr = NULL;
else
ifa->ifa_broadaddr =
addrcpy(&lifrp->lifr_broadaddr, &buf);
} else {
ifa->ifa_dstaddr = NULL;
}
ifa++;
nlif--;
lifrp++;
}
*bufp = buf;
return (0);
}
int
getifaddrs(struct ifaddrs **ifap)
{
int fd4, fd6;
int nif4, nif6 = 0;
struct lifreq *ifr4 = NULL;
struct lifreq *ifr6 = NULL;
struct ifaddrs *ifa = NULL;
char *buf;
if ((fd4 = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
return (-1);
if ((fd6 = socket(AF_INET6, SOCK_DGRAM, 0)) == -1 &&
errno != EAFNOSUPPORT) {
(void) close(fd4);
return (-1);
}
if ((nif4 = get_lifreq(fd4, &ifr4)) == -1 ||
(fd6 != -1 && (nif6 = get_lifreq(fd6, &ifr6)) == -1))
goto failure;
if (nif4 == 0 && nif6 == 0) {
*ifap = NULL;
return (0);
}
ifa = malloc(nbytes(ifr4, nif4, sizeof (struct sockaddr_in)) +
nbytes(ifr6, nif6, sizeof (struct sockaddr_in6)));
if (ifa == NULL)
goto failure;
buf = (char *)(ifa + nif4 + nif6);
if (populate(ifa, fd4, ifr4, nif4, AF_INET, &buf) == -1)
goto failure;
if (nif4 > 0 && nif6 > 0)
ifa[nif4 - 1].ifa_next = ifa + nif4;
if (populate(ifa + nif4, fd6, ifr6, nif6, AF_INET6, &buf) == -1)
goto failure;
return (0);
failure:
free(ifa);
(void) close(fd4);
if (fd6 != -1)
(void) close(fd6);
free(ifr4);
free(ifr6);
return (-1);
}
void
freeifaddrs(struct ifaddrs *ifa)
{
free(ifa);
}
/*
* Copyright (c) 2006 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.
*/
#include <sys/types.h>
#undef ifa_broadaddr
#undef ifa_dstaddr
struct ifaddrs {
struct ifaddrs *ifa_next; /* Pointer to next struct */
char *ifa_name; /* Interface name */
uint64_t ifa_flags; /* Interface flags */
struct sockaddr *ifa_addr; /* Interface address */
struct sockaddr *ifa_netmask; /* Interface netmask */
struct sockaddr *ifa_dstaddr; /* P2P interface destination */
};
#define ifa_broadaddr ifa_dstaddr
extern int getifaddrs(struct ifaddrs **);
extern void freeifaddrs(struct ifaddrs *);
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