#ifdef __hpux
#undef SIOCGLIFCONF
#undef lifc_len
#undef lifc_buf
#undef lifc_req
#undef lifconf
#undef SIOCGLIFADDR
#undef SIOCGLIFFLAGS
#undef SIOCGLIFDSTADDR
#undef SIOCGLIFNETMASK
#undef lifr_addr
#undef lifr_name
#undef lifr_dstaddr
#undef lifr_flags
#undef ss_family
#undef lifreq
#endif
#ifndef SIOCGLIFCONF
#define SIOCGLIFCONF SIOCGIFCONF
#define lifc_len ifc_len
#define lifc_buf ifc_buf
#define lifc_req ifc_req
#define lifconf ifconf
#else
#define ISC_HAVE_LIFC_FAMILY 1
#define ISC_HAVE_LIFC_FLAGS 1
#endif
#ifndef SIOCGLIFADDR
#define SIOCGLIFADDR SIOCGIFADDR
#define SIOCGLIFFLAGS SIOCGIFFLAGS
#define SIOCGLIFDSTADDR SIOCGIFDSTADDR
#define SIOCGLIFNETMASK SIOCGIFNETMASK
#define lifr_addr ifr_addr
#define lifr_name ifr_name
#define lifr_dstaddr ifr_dstaddr
#define lifr_flags ifr_flags
#define ss_family sa_family
#define lifreq ifreq
#endif
#define IFITER_MAGIC ISC_MAGIC('I', 'F', 'I', 'T')
#define VALID_IFITER(t) ISC_MAGIC_VALID(t, IFITER_MAGIC)
struct isc_interfaceiter {
unsigned int magic;
isc_mem_t *mctx;
int socket;
struct lifconf ifc;
void *buf;
unsigned int bufsize;
unsigned int pos;
isc_interface_t current;
isc_result_t result;
};
#define IFCONF_BUFSIZE_INITIAL 4096
#define IFCONF_BUFSIZE_MAX 1048576
isc_result_t
isc_interfaceiter_create(isc_mem_t *mctx, isc_interfaceiter_t **iterp) {
isc_interfaceiter_t *iter;
isc_result_t result;
char strbuf[ISC_STRERRORSIZE];
REQUIRE(mctx != NULL);
REQUIRE(iterp != NULL);
REQUIRE(*iterp == NULL);
iter = isc_mem_get(mctx, sizeof(*iter));
if (iter == NULL)
return (ISC_R_NOMEMORY);
iter->mctx = mctx;
iter->buf = NULL;
if ((iter->socket = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
isc__strerror(errno, strbuf, sizeof(strbuf));
UNEXPECTED_ERROR(__FILE__, __LINE__,
isc_msgcat_get(isc_msgcat,
ISC_MSGSET_IFITERIOCTL,
ISC_MSG_MAKESCANSOCKET,
"making interface "
"scan socket: %s"),
strbuf);
result = ISC_R_UNEXPECTED;
goto socket_failure;
}
iter->bufsize = IFCONF_BUFSIZE_INITIAL;
for (;;) {
iter->buf = isc_mem_get(mctx, iter->bufsize);
if (iter->buf == NULL) {
result = ISC_R_NOMEMORY;
goto alloc_failure;
}
memset(&iter->ifc.lifc_len, 0, sizeof(iter->ifc.lifc_len));
#ifdef ISC_HAVE_LIFC_FAMILY
iter->ifc.lifc_family = AF_UNSPEC;
#endif
#ifdef ISC_HAVE_LIFC_FLAGS
iter->ifc.lifc_flags = 0;
#endif
iter->ifc.lifc_len = iter->bufsize;
iter->ifc.lifc_buf = iter->buf;
if (ioctl(iter->socket, SIOCGLIFCONF, (char *)&iter->ifc)
== -1) {
if (errno != EINVAL) {
isc__strerror(errno, strbuf, sizeof(strbuf));
UNEXPECTED_ERROR(__FILE__, __LINE__,
isc_msgcat_get(isc_msgcat,
ISC_MSGSET_IFITERIOCTL,
ISC_MSG_GETIFCONFIG,
"get interface "
"configuration: %s"),
strbuf);
result = ISC_R_UNEXPECTED;
goto ioctl_failure;
}
} else {
if (iter->ifc.lifc_len + 2 * sizeof(struct lifreq)
< iter->bufsize)
break;
}
if (iter->bufsize >= IFCONF_BUFSIZE_MAX) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
isc_msgcat_get(isc_msgcat,
ISC_MSGSET_IFITERIOCTL,
ISC_MSG_BUFFERMAX,
"get interface "
"configuration: "
"maximum buffer "
"size exceeded"));
result = ISC_R_UNEXPECTED;
goto ioctl_failure;
}
isc_mem_put(mctx, iter->buf, iter->bufsize);
iter->bufsize *= 2;
}
iter->pos = (unsigned int) -1;
iter->result = ISC_R_FAILURE;
iter->magic = IFITER_MAGIC;
*iterp = iter;
return (ISC_R_SUCCESS);
ioctl_failure:
isc_mem_put(mctx, iter->buf, iter->bufsize);
alloc_failure:
(void) close(iter->socket);
socket_failure:
isc_mem_put(mctx, iter, sizeof *iter);
return (result);
}
static isc_result_t
internal_current(isc_interfaceiter_t *iter) {
struct lifreq *ifrp;
struct lifreq lifreq;
int family;
char strbuf[ISC_STRERRORSIZE];
REQUIRE(VALID_IFITER(iter));
REQUIRE (iter->pos < (unsigned int) iter->ifc.lifc_len);
ifrp = (struct lifreq *)((char *) iter->ifc.lifc_req + iter->pos);
memset(&lifreq, 0, sizeof lifreq);
memcpy(&lifreq, ifrp, sizeof lifreq);
family = lifreq.lifr_addr.ss_family;
if (family != AF_INET)
return (ISC_R_IGNORE);
memset(&iter->current, 0, sizeof(iter->current));
iter->current.af = family;
INSIST(sizeof(lifreq.lifr_name) <= sizeof(iter->current.name));
memset(iter->current.name, 0, sizeof(iter->current.name));
memcpy(iter->current.name, lifreq.lifr_name, sizeof(lifreq.lifr_name));
get_addr(family, &iter->current.address,
(struct sockaddr *)&lifreq.lifr_addr);
switch (family) {
case AF_INET:
if (iter->current.address.type.in.s_addr == htonl(INADDR_ANY))
return (ISC_R_IGNORE);
break;
case AF_INET6:
if (memcmp(&iter->current.address.type.in6, &in6addr_any,
sizeof(in6addr_any)) == 0)
return (ISC_R_IGNORE);
break;
}
iter->current.flags = 0;
if (ioctl(iter->socket, SIOCGLIFFLAGS, (char *) &lifreq) < 0) {
isc__strerror(errno, strbuf, sizeof(strbuf));
UNEXPECTED_ERROR(__FILE__, __LINE__,
"%s: getting interface flags: %s",
lifreq.lifr_name, strbuf);
return (ISC_R_IGNORE);
}
if ((lifreq.lifr_flags & IFF_UP) != 0)
iter->current.flags |= INTERFACE_F_UP;
if ((lifreq.lifr_flags & IFF_POINTOPOINT) != 0)
iter->current.flags |= INTERFACE_F_POINTTOPOINT;
if ((lifreq.lifr_flags & IFF_LOOPBACK) != 0)
iter->current.flags |= INTERFACE_F_LOOPBACK;
if ((iter->current.flags & INTERFACE_F_POINTTOPOINT) != 0) {
if (ioctl(iter->socket, SIOCGLIFDSTADDR, (char *)&lifreq)
< 0) {
isc__strerror(errno, strbuf, sizeof(strbuf));
UNEXPECTED_ERROR(__FILE__, __LINE__,
isc_msgcat_get(isc_msgcat,
ISC_MSGSET_IFITERIOCTL,
ISC_MSG_GETDESTADDR,
"%s: getting "
"destination address: %s"),
lifreq.lifr_name, strbuf);
return (ISC_R_IGNORE);
}
get_addr(family, &iter->current.dstaddress,
(struct sockaddr *)&lifreq.lifr_dstaddr);
}
memset(&lifreq, 0, sizeof lifreq);
memcpy(&lifreq, ifrp, sizeof lifreq);
switch (family) {
case AF_INET:
if (ioctl(iter->socket, SIOCGLIFNETMASK, (char *)&lifreq)
< 0) {
isc__strerror(errno, strbuf, sizeof(strbuf));
UNEXPECTED_ERROR(__FILE__, __LINE__,
isc_msgcat_get(isc_msgcat,
ISC_MSGSET_IFITERIOCTL,
ISC_MSG_GETNETMASK,
"%s: getting netmask: %s"),
lifreq.lifr_name, strbuf);
return (ISC_R_IGNORE);
}
get_addr(family, &iter->current.netmask,
(struct sockaddr *)&lifreq.lifr_addr);
break;
case AF_INET6: {
#ifdef lifr_addrlen
int i, bits;
iter->current.netmask.family = family;
for (i = 0 ; i < lifreq.lifr_addrlen; i += 8) {
bits = lifreq.lifr_addrlen - i;
bits = (bits < 8 ) ? (8-bits) : 0;
iter->current.netmask.type.in6.s6_addr[i/8] =
(~0 << bits) &0xff;
}
#endif
break;
}
}
return (ISC_R_SUCCESS);
}
static isc_result_t
internal_next(isc_interfaceiter_t *iter) {
struct lifreq *ifrp;
REQUIRE (iter->pos < (unsigned int) iter->ifc.lifc_len);
ifrp = (struct lifreq *)((char *) iter->ifc.lifc_req + iter->pos);
#ifdef ISC_PLATFORM_HAVESALEN
if (ifrp->lifr_addr.sa_len > sizeof(struct sockaddr))
iter->pos += sizeof(ifrp->lifr_name) + ifrp->lifr_addr.sa_len;
else
#endif
iter->pos += sizeof *ifrp;
if (iter->pos >= (unsigned int) iter->ifc.lifc_len)
return (ISC_R_NOMORE);
return (ISC_R_SUCCESS);
}
static void
internal_destroy(isc_interfaceiter_t *iter) {
(void) close(iter->socket);
}