OpenSolaris_b135/lib/libipmp/common/ipmp_query.c
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* IPMP query interfaces (see PSARC/2002/615 and PSARC/2007/272).
*/
#include <assert.h>
#include <errno.h>
#include <libinetutil.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include "ipmp_impl.h"
#include "ipmp_mpathd.h"
#include "ipmp_query_impl.h"
static ipmp_ifinfo_t *ipmp_ifinfo_clone(ipmp_ifinfo_t *);
static ipmp_addrinfo_t *ipmp_addrinfo_clone(ipmp_addrinfo_t *);
static ipmp_addrlist_t *ipmp_addrlist_clone(ipmp_addrlist_t *);
static ipmp_grouplist_t *ipmp_grouplist_clone(ipmp_grouplist_t *);
static ipmp_groupinfo_t *ipmp_groupinfo_clone(ipmp_groupinfo_t *);
static ipmp_iflist_t *ipmp_iflist_create(uint_t, char (*)[LIFNAMSIZ]);
static void ipmp_freeiflist(ipmp_iflist_t *);
static ipmp_addrlist_t *ipmp_addrlist_create(uint_t, struct sockaddr_storage *);
static void ipmp_freeaddrlist(ipmp_addrlist_t *);
static ipmp_groupinfo_t *ipmp_snap_getgroupinfo(ipmp_snap_t *, const char *);
static ipmp_ifinfo_t *ipmp_snap_getifinfo(ipmp_snap_t *, const char *);
static ipmp_addrinfo_t *ipmp_snap_getaddrinfo(ipmp_snap_t *, const char *,
struct sockaddr_storage *);
static int ipmp_snap_take(ipmp_state_t *, ipmp_snap_t **);
static boolean_t ipmp_checktlv(ipmp_infotype_t, size_t, void *);
static int ipmp_querydone(ipmp_state_t *, int);
/*
* Using `statep', send a query request for `type' to in.mpathd, and if
* necessary wait until at least `endtp' for a response. Returns an IPMP
* error code. If successful, the caller may then read additional query
* information through ipmp_readinfo(), and must eventually call
* ipmp_querydone() to complete the query operation. Only one query may be
* outstanding on a given `statep' at a time.
*/
static int
ipmp_sendquery(ipmp_state_t *statep, ipmp_infotype_t type, const char *name,
const void *addr, struct timeval *endtp)
{
mi_query_t query;
mi_result_t result;
int retval;
query.miq_command = MI_QUERY;
query.miq_inforeq = type;
switch (type) {
case IPMP_ADDRINFO:
(void) strlcpy(query.miq_grname, name, LIFGRNAMSIZ);
query.miq_addr = *(struct sockaddr_storage *)addr;
break;
case IPMP_GROUPINFO:
(void) strlcpy(query.miq_grname, name, LIFGRNAMSIZ);
break;
case IPMP_IFINFO:
(void) strlcpy(query.miq_ifname, name, LIFNAMSIZ);
break;
case IPMP_GROUPLIST:
case IPMP_SNAP:
break;
default:
assert(0);
}
if (gettimeofday(endtp, NULL) == -1)
return (IPMP_FAILURE);
endtp->tv_sec += IPMP_REQTIMEOUT;
assert(statep->st_fd == -1);
retval = ipmp_connect(&statep->st_fd);
if (retval != IPMP_SUCCESS)
return (retval);
retval = ipmp_write(statep->st_fd, &query, sizeof (query));
if (retval != IPMP_SUCCESS)
return (ipmp_querydone(statep, retval));
retval = ipmp_read(statep->st_fd, &result, sizeof (result), endtp);
if (retval != IPMP_SUCCESS)
return (ipmp_querydone(statep, retval));
if (result.me_mpathd_error != IPMP_SUCCESS)
return (ipmp_querydone(statep, result.me_mpathd_error));
return (IPMP_SUCCESS);
}
/*
* Using `statep', read a query response of type `infotype' into a dynamically
* allocated buffer pointed to by `*infop', before the current time becomes
* `endtp'. Returns an IPMP error code.
*/
static int
ipmp_readinfo(ipmp_state_t *statep, ipmp_infotype_t infotype, void **infop,
const struct timeval *endtp)
{
int retval;
size_t len;
ipmp_infotype_t type;
retval = ipmp_readtlv(statep->st_fd, &type, &len, infop, endtp);
if (retval != IPMP_SUCCESS)
return (retval);
if (type != infotype || !ipmp_checktlv(type, len, *infop)) {
free(*infop);
return (IPMP_EPROTO);
}
return (IPMP_SUCCESS);
}
/*
* Using `statep', read in the remaining IPMP group information TLVs from
* in.mpathd into `grinfop' before the current time becomes `endtp'. Returns
* an IPMP error code. On failure, `grinfop' will have its original contents.
*/
static int
ipmp_readgroupinfo_lists(ipmp_state_t *statep, ipmp_groupinfo_t *grinfop,
const struct timeval *endtp)
{
int retval;
ipmp_iflist_t *iflistp;
ipmp_addrlist_t *adlistp;
retval = ipmp_readinfo(statep, IPMP_IFLIST, (void **)&iflistp, endtp);
if (retval != IPMP_SUCCESS)
return (retval);
retval = ipmp_readinfo(statep, IPMP_ADDRLIST, (void **)&adlistp, endtp);
if (retval != IPMP_SUCCESS) {
ipmp_freeiflist(iflistp);
return (retval);
}
grinfop->gr_iflistp = iflistp;
grinfop->gr_adlistp = adlistp;
return (IPMP_SUCCESS);
}
/*
* Using `statep', read in the remaining IPMP interface information TLVs from
* in.mpathd into `ifinfop' before the current time becomes `endtp'. Returns
* an IPMP error code. On failure, `ifinfop' will have its original contents.
*/
static int
ipmp_readifinfo_lists(ipmp_state_t *statep, ipmp_ifinfo_t *ifinfop,
const struct timeval *endtp)
{
int retval;
ipmp_addrlist_t *tlist4p, *tlist6p;
retval = ipmp_readinfo(statep, IPMP_ADDRLIST, (void **)&tlist4p, endtp);
if (retval != IPMP_SUCCESS)
return (retval);
retval = ipmp_readinfo(statep, IPMP_ADDRLIST, (void **)&tlist6p, endtp);
if (retval != IPMP_SUCCESS) {
ipmp_freeaddrlist(tlist4p);
return (retval);
}
ifinfop->if_targinfo4.it_targlistp = tlist4p;
ifinfop->if_targinfo6.it_targlistp = tlist6p;
return (IPMP_SUCCESS);
}
/*
* Complete the query operation started in ipmp_sendquery(). The interface is
* designed to be easy to use in the `return' statement of a function, and
* thus returns the passed in `retval' and preserves `errno'.
*/
static int
ipmp_querydone(ipmp_state_t *statep, int retval)
{
int error = errno;
(void) close(statep->st_fd);
statep->st_fd = -1;
errno = error;
return (retval);
}
/*
* Using `handle', get the group list and store the results in a dynamically
* allocated buffer pointed to by `*grlistpp'. Returns an IPMP error code.
*/
int
ipmp_getgrouplist(ipmp_handle_t handle, ipmp_grouplist_t **grlistpp)
{
ipmp_state_t *statep = handle;
struct timeval end;
int retval;
if (statep->st_snap != NULL) {
*grlistpp = ipmp_grouplist_clone(statep->st_snap->sn_grlistp);
return (*grlistpp != NULL ? IPMP_SUCCESS : IPMP_ENOMEM);
}
retval = ipmp_sendquery(statep, IPMP_GROUPLIST, NULL, NULL, &end);
if (retval != IPMP_SUCCESS)
return (retval);
retval = ipmp_readinfo(statep, IPMP_GROUPLIST, (void **)grlistpp, &end);
return (ipmp_querydone(statep, retval));
}
/*
* Free the group list pointed to by `grlistp'.
*/
void
ipmp_freegrouplist(ipmp_grouplist_t *grlistp)
{
free(grlistp);
}
/*
* Using `handle', get the group information associated with group `name' and
* store the results in a dynamically allocated buffer pointed to by
* `*grinfopp'. Returns an IPMP error code.
*/
int
ipmp_getgroupinfo(ipmp_handle_t handle, const char *name,
ipmp_groupinfo_t **grinfopp)
{
ipmp_state_t *statep = handle;
int retval;
struct timeval end;
ipmp_groupinfo_t *grinfop;
if (statep->st_snap != NULL) {
grinfop = ipmp_snap_getgroupinfo(statep->st_snap, name);
if (grinfop == NULL)
return (IPMP_EUNKGROUP);
*grinfopp = ipmp_groupinfo_clone(grinfop);
return (*grinfopp != NULL ? IPMP_SUCCESS : IPMP_ENOMEM);
}
retval = ipmp_sendquery(statep, IPMP_GROUPINFO, name, NULL, &end);
if (retval != IPMP_SUCCESS)
return (retval);
retval = ipmp_readinfo(statep, IPMP_GROUPINFO, (void **)grinfopp, &end);
if (retval != IPMP_SUCCESS)
return (ipmp_querydone(statep, retval));
retval = ipmp_readgroupinfo_lists(statep, *grinfopp, &end);
if (retval != IPMP_SUCCESS)
free(*grinfopp);
return (ipmp_querydone(statep, retval));
}
/*
* Free the group information pointed to by `grinfop'.
*/
void
ipmp_freegroupinfo(ipmp_groupinfo_t *grinfop)
{
ipmp_freeaddrlist(grinfop->gr_adlistp);
ipmp_freeiflist(grinfop->gr_iflistp);
free(grinfop);
}
/*
* Using `handle', get the interface information associated with interface
* `name' and store the results in a dynamically allocated buffer pointed to
* by `*ifinfopp'. Returns an IPMP error code.
*/
int
ipmp_getifinfo(ipmp_handle_t handle, const char *name, ipmp_ifinfo_t **ifinfopp)
{
ipmp_state_t *statep = handle;
ipmp_ifinfo_t *ifinfop;
int retval;
struct timeval end;
if (statep->st_snap != NULL) {
ifinfop = ipmp_snap_getifinfo(statep->st_snap, name);
if (ifinfop == NULL)
return (IPMP_EUNKIF);
*ifinfopp = ipmp_ifinfo_clone(ifinfop);
return (*ifinfopp != NULL ? IPMP_SUCCESS : IPMP_ENOMEM);
}
retval = ipmp_sendquery(statep, IPMP_IFINFO, name, NULL, &end);
if (retval != IPMP_SUCCESS)
return (retval);
retval = ipmp_readinfo(statep, IPMP_IFINFO, (void **)ifinfopp, &end);
if (retval != IPMP_SUCCESS)
return (ipmp_querydone(statep, retval));
retval = ipmp_readifinfo_lists(statep, *ifinfopp, &end);
if (retval != IPMP_SUCCESS)
free(*ifinfopp);
return (ipmp_querydone(statep, retval));
}
/*
* Free the interface information pointed to by `ifinfop'.
*/
void
ipmp_freeifinfo(ipmp_ifinfo_t *ifinfop)
{
ipmp_freeaddrlist(ifinfop->if_targinfo4.it_targlistp);
ipmp_freeaddrlist(ifinfop->if_targinfo6.it_targlistp);
free(ifinfop);
}
/*
* Using `handle', get the address information associated with address `addrp'
* on group `grname' and store the results in a dynamically allocated buffer
* pointed to by `*adinfopp'. Returns an IPMP error code.
*/
int
ipmp_getaddrinfo(ipmp_handle_t handle, const char *grname,
struct sockaddr_storage *addrp, ipmp_addrinfo_t **adinfopp)
{
ipmp_state_t *statep = handle;
ipmp_addrinfo_t *adinfop;
int retval;
struct timeval end;
if (statep->st_snap != NULL) {
adinfop = ipmp_snap_getaddrinfo(statep->st_snap, grname, addrp);
if (adinfop == NULL)
return (IPMP_EUNKADDR);
*adinfopp = ipmp_addrinfo_clone(adinfop);
return (*adinfopp != NULL ? IPMP_SUCCESS : IPMP_ENOMEM);
}
retval = ipmp_sendquery(statep, IPMP_ADDRINFO, grname, addrp, &end);
if (retval != IPMP_SUCCESS)
return (retval);
retval = ipmp_readinfo(statep, IPMP_ADDRINFO, (void **)adinfopp, &end);
return (ipmp_querydone(statep, retval));
}
/*
* Free the address information pointed to by `adinfop'.
*/
void
ipmp_freeaddrinfo(ipmp_addrinfo_t *adinfop)
{
free(adinfop);
}
/*
* Check if `buf' has a NUL byte in its first `bufsize' bytes.
*/
static boolean_t
hasnulbyte(const char *buf, size_t bufsize)
{
while (bufsize-- > 0) {
if (buf[bufsize] == '\0')
return (B_TRUE);
}
return (B_FALSE);
}
/*
* Check that the TLV triplet named by `type', `len' and `value' is correctly
* formed.
*/
static boolean_t
ipmp_checktlv(ipmp_infotype_t type, size_t len, void *value)
{
ipmp_iflist_t *iflistp;
ipmp_ifinfo_t *ifinfop;
ipmp_grouplist_t *grlistp;
ipmp_groupinfo_t *grinfop;
ipmp_addrlist_t *adlistp;
unsigned int i;
switch (type) {
case IPMP_ADDRINFO:
if (len != sizeof (ipmp_addrinfo_t))
return (B_FALSE);
break;
case IPMP_ADDRLIST:
adlistp = (ipmp_addrlist_t *)value;
if (len < IPMP_ADDRLIST_SIZE(0) ||
len < IPMP_ADDRLIST_SIZE(adlistp->al_naddr))
return (B_FALSE);
break;
case IPMP_IFLIST:
iflistp = (ipmp_iflist_t *)value;
if (len < IPMP_IFLIST_SIZE(0) ||
len < IPMP_IFLIST_SIZE(iflistp->il_nif))
return (B_FALSE);
for (i = 0; i < iflistp->il_nif; i++)
if (!hasnulbyte(iflistp->il_ifs[i], LIFNAMSIZ))
return (B_FALSE);
break;
case IPMP_IFINFO:
ifinfop = (ipmp_ifinfo_t *)value;
if (len != sizeof (ipmp_ifinfo_t))
return (B_FALSE);
if (!hasnulbyte(ifinfop->if_name, LIFNAMSIZ) ||
!hasnulbyte(ifinfop->if_group, LIFGRNAMSIZ))
return (B_FALSE);
break;
case IPMP_GROUPLIST:
grlistp = (ipmp_grouplist_t *)value;
if (len < IPMP_GROUPLIST_SIZE(0) ||
len < IPMP_GROUPLIST_SIZE(grlistp->gl_ngroup))
return (B_FALSE);
for (i = 0; i < grlistp->gl_ngroup; i++)
if (!hasnulbyte(grlistp->gl_groups[i], LIFGRNAMSIZ))
return (B_FALSE);
break;
case IPMP_GROUPINFO:
grinfop = (ipmp_groupinfo_t *)value;
if (len != sizeof (ipmp_groupinfo_t))
return (B_FALSE);
if (!hasnulbyte(grinfop->gr_name, LIFGRNAMSIZ))
return (B_FALSE);
break;
case IPMP_SNAP:
if (len != sizeof (ipmp_snap_t))
return (B_FALSE);
break;
default:
return (B_FALSE);
}
return (B_TRUE);
}
/*
* Create a group list; arguments match ipmp_grouplist_t fields. Returns a
* pointer to the new group list on success, or NULL on failure.
*/
ipmp_grouplist_t *
ipmp_grouplist_create(uint64_t sig, unsigned int ngroup,
char (*groups)[LIFGRNAMSIZ])
{
unsigned int i;
ipmp_grouplist_t *grlistp;
grlistp = malloc(IPMP_GROUPLIST_SIZE(ngroup));
if (grlistp == NULL)
return (NULL);
grlistp->gl_sig = sig;
grlistp->gl_ngroup = ngroup;
for (i = 0; i < ngroup; i++)
(void) strlcpy(grlistp->gl_groups[i], groups[i], LIFGRNAMSIZ);
return (grlistp);
}
/*
* Clone the group list named by `grlistp'. Returns a pointer to the clone on
* success, or NULL on failure.
*/
ipmp_grouplist_t *
ipmp_grouplist_clone(ipmp_grouplist_t *grlistp)
{
return (ipmp_grouplist_create(grlistp->gl_sig, grlistp->gl_ngroup,
grlistp->gl_groups));
}
/*
* Create target information; arguments match ipmp_targinfo_t fields. Returns
* a pointer to the new target info on success, or NULL on failure.
*/
ipmp_targinfo_t *
ipmp_targinfo_create(const char *name, struct sockaddr_storage *testaddrp,
ipmp_if_targmode_t targmode, uint_t ntarg, struct sockaddr_storage *targs)
{
ipmp_targinfo_t *targinfop;
targinfop = malloc(sizeof (ipmp_targinfo_t));
if (targinfop == NULL)
return (NULL);
targinfop->it_testaddr = *testaddrp;
targinfop->it_targmode = targmode;
targinfop->it_targlistp = ipmp_addrlist_create(ntarg, targs);
if (targinfop->it_targlistp == NULL) {
ipmp_freetarginfo(targinfop);
return (NULL);
}
(void) strlcpy(targinfop->it_name, name, LIFNAMSIZ);
return (targinfop);
}
/*
* Free the target information pointed to by `targinfop'.
*/
void
ipmp_freetarginfo(ipmp_targinfo_t *targinfop)
{
free(targinfop->it_targlistp);
free(targinfop);
}
/*
* Create an interface list; arguments match ipmp_iflist_t fields. Returns a
* pointer to the new interface list on success, or NULL on failure.
*/
static ipmp_iflist_t *
ipmp_iflist_create(uint_t nif, char (*ifs)[LIFNAMSIZ])
{
unsigned int i;
ipmp_iflist_t *iflistp;
iflistp = malloc(IPMP_IFLIST_SIZE(nif));
if (iflistp == NULL)
return (NULL);
iflistp->il_nif = nif;
for (i = 0; i < nif; i++)
(void) strlcpy(iflistp->il_ifs[i], ifs[i], LIFNAMSIZ);
return (iflistp);
}
/*
* Free the interface list pointed to by `iflistp'.
*/
static void
ipmp_freeiflist(ipmp_iflist_t *iflistp)
{
free(iflistp);
}
/*
* Create an interface; arguments match ipmp_ifinfo_t fields. Returns a
* pointer to the new interface on success, or NULL on failure.
*/
ipmp_ifinfo_t *
ipmp_ifinfo_create(const char *name, const char *group, ipmp_if_state_t state,
ipmp_if_type_t type, ipmp_if_linkstate_t linkstate,
ipmp_if_probestate_t probestate, ipmp_if_flags_t flags,
ipmp_targinfo_t *targinfo4p, ipmp_targinfo_t *targinfo6p)
{
ipmp_ifinfo_t *ifinfop;
ifinfop = malloc(sizeof (ipmp_ifinfo_t));
if (ifinfop == NULL)
return (NULL);
(void) strlcpy(ifinfop->if_name, name, LIFNAMSIZ);
(void) strlcpy(ifinfop->if_group, group, LIFGRNAMSIZ);
ifinfop->if_state = state;
ifinfop->if_type = type;
ifinfop->if_linkstate = linkstate;
ifinfop->if_probestate = probestate;
ifinfop->if_flags = flags;
ifinfop->if_targinfo4 = *targinfo4p;
ifinfop->if_targinfo6 = *targinfo6p;
ifinfop->if_targinfo4.it_targlistp =
ipmp_addrlist_clone(targinfo4p->it_targlistp);
ifinfop->if_targinfo6.it_targlistp =
ipmp_addrlist_clone(targinfo6p->it_targlistp);
if (ifinfop->if_targinfo4.it_targlistp == NULL ||
ifinfop->if_targinfo6.it_targlistp == NULL) {
ipmp_freeifinfo(ifinfop);
return (NULL);
}
return (ifinfop);
}
/*
* Clone the interface information named by `ifinfop'. Returns a pointer to
* the clone on success, or NULL on failure.
*/
ipmp_ifinfo_t *
ipmp_ifinfo_clone(ipmp_ifinfo_t *ifinfop)
{
return (ipmp_ifinfo_create(ifinfop->if_name, ifinfop->if_group,
ifinfop->if_state, ifinfop->if_type, ifinfop->if_linkstate,
ifinfop->if_probestate, ifinfop->if_flags, &ifinfop->if_targinfo4,
&ifinfop->if_targinfo6));
}
/*
* Create a group; arguments match ipmp_groupinfo_t fields. Returns a pointer
* to the new group on success, or NULL on failure.
*/
ipmp_groupinfo_t *
ipmp_groupinfo_create(const char *name, uint64_t sig, uint_t fdt,
ipmp_group_state_t state, uint_t nif, char (*ifs)[LIFNAMSIZ],
const char *grifname, const char *m4ifname, const char *m6ifname,
const char *bcifname, uint_t naddr, struct sockaddr_storage *addrs)
{
ipmp_groupinfo_t *grinfop;
grinfop = malloc(sizeof (ipmp_groupinfo_t));
if (grinfop == NULL)
return (NULL);
grinfop->gr_sig = sig;
grinfop->gr_fdt = fdt;
grinfop->gr_state = state;
grinfop->gr_iflistp = ipmp_iflist_create(nif, ifs);
grinfop->gr_adlistp = ipmp_addrlist_create(naddr, addrs);
if (grinfop->gr_iflistp == NULL || grinfop->gr_adlistp == NULL) {
ipmp_freegroupinfo(grinfop);
return (NULL);
}
(void) strlcpy(grinfop->gr_name, name, LIFGRNAMSIZ);
(void) strlcpy(grinfop->gr_ifname, grifname, LIFNAMSIZ);
(void) strlcpy(grinfop->gr_m4ifname, m4ifname, LIFNAMSIZ);
(void) strlcpy(grinfop->gr_m6ifname, m6ifname, LIFNAMSIZ);
(void) strlcpy(grinfop->gr_bcifname, bcifname, LIFNAMSIZ);
return (grinfop);
}
/*
* Clone the group information named by `grinfop'. Returns a pointer to
* the clone on success, or NULL on failure.
*/
ipmp_groupinfo_t *
ipmp_groupinfo_clone(ipmp_groupinfo_t *grinfop)
{
ipmp_addrlist_t *adlistp = grinfop->gr_adlistp;
return (ipmp_groupinfo_create(grinfop->gr_name, grinfop->gr_sig,
grinfop->gr_fdt, grinfop->gr_state, grinfop->gr_iflistp->il_nif,
grinfop->gr_iflistp->il_ifs, grinfop->gr_ifname,
grinfop->gr_m4ifname, grinfop->gr_m6ifname, grinfop->gr_bcifname,
adlistp->al_naddr, adlistp->al_addrs));
}
/*
* Create an address list; arguments match ipmp_addrlist_t fields. Returns
* a pointer to the new address list on success, or NULL on failure.
*/
static ipmp_addrlist_t *
ipmp_addrlist_create(uint_t naddr, struct sockaddr_storage *addrs)
{
unsigned int i;
ipmp_addrlist_t *adlistp;
adlistp = malloc(IPMP_ADDRLIST_SIZE(naddr));
if (adlistp == NULL)
return (NULL);
adlistp->al_naddr = naddr;
for (i = 0; i < naddr; i++)
adlistp->al_addrs[i] = addrs[i];
return (adlistp);
}
/*
* Clone the address list named by `adlistp'. Returns a pointer to the clone
* on success, or NULL on failure.
*/
static ipmp_addrlist_t *
ipmp_addrlist_clone(ipmp_addrlist_t *adlistp)
{
return (ipmp_addrlist_create(adlistp->al_naddr, adlistp->al_addrs));
}
/*
* Free the address list pointed to by `adlistp'.
*/
static void
ipmp_freeaddrlist(ipmp_addrlist_t *adlistp)
{
free(adlistp);
}
/*
* Create an address; arguments match ipmp_addrinfo_t fields. Returns a
* pointer to the new address on success, or NULL on failure.
*/
ipmp_addrinfo_t *
ipmp_addrinfo_create(struct sockaddr_storage *addrp, ipmp_addr_state_t state,
const char *group, const char *binding)
{
ipmp_addrinfo_t *adinfop;
adinfop = malloc(sizeof (ipmp_addrinfo_t));
if (adinfop == NULL)
return (NULL);
adinfop->ad_addr = *addrp;
adinfop->ad_state = state;
(void) strlcpy(adinfop->ad_group, group, LIFGRNAMSIZ);
(void) strlcpy(adinfop->ad_binding, binding, LIFNAMSIZ);
return (adinfop);
}
/*
* Clone the address information named by `adinfop'. Returns a pointer to
* the clone on success, or NULL on failure.
*/
ipmp_addrinfo_t *
ipmp_addrinfo_clone(ipmp_addrinfo_t *adinfop)
{
return (ipmp_addrinfo_create(&adinfop->ad_addr, adinfop->ad_state,
adinfop->ad_group, adinfop->ad_binding));
}
/*
* Set the query context associated with `handle' to `qcontext', which must be
* either IPMP_QCONTEXT_LIVE or IPMP_QCONTEXT_SNAP. Upon success, any
* previous snapshot associated with `handle' is discarded. Returns an IPMP
* error code.
*/
int
ipmp_setqcontext(ipmp_handle_t handle, ipmp_qcontext_t qcontext)
{
ipmp_state_t *statep = handle;
ipmp_snap_t *snap;
int retval;
switch (qcontext) {
case IPMP_QCONTEXT_LIVE:
snap = NULL;
break;
case IPMP_QCONTEXT_SNAP:
retval = ipmp_snap_take(statep, &snap);
if (retval != IPMP_SUCCESS)
return (retval);
break;
default:
return (IPMP_EINVAL);
}
if (statep->st_snap != NULL)
ipmp_snap_free(statep->st_snap);
statep->st_snap = snap;
return (IPMP_SUCCESS);
}
/*
* Create an empty snapshot. Returns a pointer to the snapshot on success,
* or NULL on failure.
*/
ipmp_snap_t *
ipmp_snap_create(void)
{
ipmp_snap_t *snap;
snap = malloc(sizeof (ipmp_snap_t));
if (snap == NULL)
return (NULL);
snap->sn_grlistp = NULL;
snap->sn_grinfolistp = NULL;
snap->sn_ifinfolistp = NULL;
snap->sn_adinfolistp = NULL;
snap->sn_ngroup = 0;
snap->sn_nif = 0;
snap->sn_naddr = 0;
return (snap);
}
/*
* Free all of the resources associated with snapshot `snap'.
*/
void
ipmp_snap_free(ipmp_snap_t *snap)
{
ipmp_ifinfolist_t *iflp, *ifnext;
ipmp_addrinfolist_t *adlp, *adnext;
ipmp_groupinfolist_t *grlp, *grnext;
ipmp_freegrouplist(snap->sn_grlistp);
for (grlp = snap->sn_grinfolistp; grlp != NULL; grlp = grnext) {
grnext = grlp->grl_next;
ipmp_freegroupinfo(grlp->grl_grinfop);
free(grlp);
}
for (iflp = snap->sn_ifinfolistp; iflp != NULL; iflp = ifnext) {
ifnext = iflp->ifl_next;
ipmp_freeifinfo(iflp->ifl_ifinfop);
free(iflp);
}
for (adlp = snap->sn_adinfolistp; adlp != NULL; adlp = adnext) {
adnext = adlp->adl_next;
ipmp_freeaddrinfo(adlp->adl_adinfop);
free(adlp);
}
free(snap);
}
/*
* Add the group information in `grinfop' to the snapshot named by `snap'.
* Returns an IPMP error code.
*/
int
ipmp_snap_addgroupinfo(ipmp_snap_t *snap, ipmp_groupinfo_t *grinfop)
{
ipmp_groupinfolist_t *grlp;
/*
* If the information for this group is already in the snapshot,
* in.mpathd is broken.
*/
if (ipmp_snap_getgroupinfo(snap, grinfop->gr_name) != NULL)
return (IPMP_EPROTO);
grlp = malloc(sizeof (ipmp_groupinfolist_t));
if (grlp == NULL)
return (IPMP_ENOMEM);
grlp->grl_grinfop = grinfop;
grlp->grl_next = snap->sn_grinfolistp;
snap->sn_grinfolistp = grlp;
snap->sn_ngroup++;
return (IPMP_SUCCESS);
}
/*
* Add the interface information in `ifinfop' to the snapshot named by `snap'.
* Returns an IPMP error code.
*/
int
ipmp_snap_addifinfo(ipmp_snap_t *snap, ipmp_ifinfo_t *ifinfop)
{
ipmp_ifinfolist_t *iflp;
/*
* If the information for this interface is already in the snapshot,
* in.mpathd is broken.
*/
if (ipmp_snap_getifinfo(snap, ifinfop->if_name) != NULL)
return (IPMP_EPROTO);
iflp = malloc(sizeof (ipmp_ifinfolist_t));
if (iflp == NULL)
return (IPMP_ENOMEM);
iflp->ifl_ifinfop = ifinfop;
iflp->ifl_next = snap->sn_ifinfolistp;
snap->sn_ifinfolistp = iflp;
snap->sn_nif++;
return (IPMP_SUCCESS);
}
/*
* Add the address information in `adinfop' to the snapshot named by `snap'.
* Returns an IPMP error code.
*/
int
ipmp_snap_addaddrinfo(ipmp_snap_t *snap, ipmp_addrinfo_t *adinfop)
{
ipmp_addrinfolist_t *adlp;
/*
* Any duplicate addresses should've already been weeded by in.mpathd.
*/
if (ipmp_snap_getaddrinfo(snap, adinfop->ad_group,
&adinfop->ad_addr) != NULL)
return (IPMP_EPROTO);
adlp = malloc(sizeof (ipmp_addrinfolist_t));
if (adlp == NULL)
return (IPMP_ENOMEM);
adlp->adl_adinfop = adinfop;
adlp->adl_next = snap->sn_adinfolistp;
snap->sn_adinfolistp = adlp;
snap->sn_naddr++;
return (IPMP_SUCCESS);
}
/*
* Retrieve the information for the group `name' in snapshot `snap'.
* Returns a pointer to the group information on success, or NULL on failure.
*/
static ipmp_groupinfo_t *
ipmp_snap_getgroupinfo(ipmp_snap_t *snap, const char *name)
{
ipmp_groupinfolist_t *grlp;
for (grlp = snap->sn_grinfolistp; grlp != NULL; grlp = grlp->grl_next) {
if (strcmp(grlp->grl_grinfop->gr_name, name) == 0)
break;
}
return (grlp != NULL ? grlp->grl_grinfop : NULL);
}
/*
* Retrieve the information for the interface `name' in snapshot `snap'.
* Returns a pointer to the interface information on success, or NULL on
* failure.
*/
static ipmp_ifinfo_t *
ipmp_snap_getifinfo(ipmp_snap_t *snap, const char *name)
{
ipmp_ifinfolist_t *iflp;
for (iflp = snap->sn_ifinfolistp; iflp != NULL; iflp = iflp->ifl_next) {
if (strcmp(iflp->ifl_ifinfop->if_name, name) == 0)
break;
}
return (iflp != NULL ? iflp->ifl_ifinfop : NULL);
}
/*
* Retrieve the information for the address `addrp' on group `grname' in
* snapshot `snap'. Returns a pointer to the address information on success,
* or NULL on failure.
*/
static ipmp_addrinfo_t *
ipmp_snap_getaddrinfo(ipmp_snap_t *snap, const char *grname,
struct sockaddr_storage *addrp)
{
ipmp_addrinfolist_t *adlp;
for (adlp = snap->sn_adinfolistp; adlp != NULL; adlp = adlp->adl_next) {
if (strcmp(grname, adlp->adl_adinfop->ad_group) == 0 &&
sockaddrcmp(addrp, &adlp->adl_adinfop->ad_addr))
break;
}
return (adlp != NULL ? adlp->adl_adinfop : NULL);
}
/*
* Using `statep', take a snapshot of the IPMP subsystem and if successful
* return it in a dynamically allocated snapshot pointed to by `*snapp'.
* Returns an IPMP error code.
*/
static int
ipmp_snap_take(ipmp_state_t *statep, ipmp_snap_t **snapp)
{
ipmp_snap_t *snap, *osnap;
ipmp_infotype_t type;
int retval;
size_t len;
void *infop;
struct timeval end;
snap = ipmp_snap_create();
if (snap == NULL)
return (IPMP_ENOMEM);
retval = ipmp_sendquery(statep, IPMP_SNAP, NULL, NULL, &end);
if (retval != IPMP_SUCCESS) {
ipmp_snap_free(snap);
return (retval);
}
retval = ipmp_readinfo(statep, IPMP_SNAP, (void **)&osnap, &end);
if (retval != IPMP_SUCCESS) {
ipmp_snap_free(snap);
return (ipmp_querydone(statep, retval));
}
/*
* Using the information in the `osnap' snapshot, build up our own
* snapshot. We know there will always be at least one TLV (for
* IPMP_GROUPLIST). If we receive anything illogical (e.g., more than
* the expected number of interfaces), then bail out. However, to a
* large extent we have to trust the information sent by in.mpathd.
*/
do {
infop = NULL;
retval = ipmp_readtlv(statep->st_fd, &type, &len, &infop, &end);
if (retval != IPMP_SUCCESS)
goto fail;
if (!ipmp_checktlv(type, len, infop)) {
retval = IPMP_EPROTO;
goto fail;
}
switch (type) {
case IPMP_GROUPLIST:
if (snap->sn_grlistp != NULL) {
retval = IPMP_EPROTO;
break;
}
snap->sn_grlistp = infop;
break;
case IPMP_IFINFO:
if (snap->sn_nif == osnap->sn_nif) {
retval = IPMP_EPROTO;
break;
}
/*
* Read in V4 and V6 targlist TLVs that follow.
*/
retval = ipmp_readifinfo_lists(statep, infop, &end);
if (retval != IPMP_SUCCESS)
break;
retval = ipmp_snap_addifinfo(snap, infop);
if (retval != IPMP_SUCCESS) {
ipmp_freeifinfo(infop);
infop = NULL;
}
break;
case IPMP_ADDRINFO:
if (snap->sn_naddr == osnap->sn_naddr) {
retval = IPMP_EPROTO;
break;
}
retval = ipmp_snap_addaddrinfo(snap, infop);
/*
* NOTE: since we didn't call ipmp_read*info_lists(),
* no need to use ipmp_freeaddrinfo() on failure.
*/
break;
case IPMP_GROUPINFO:
if (snap->sn_ngroup == osnap->sn_ngroup) {
retval = IPMP_EPROTO;
break;
}
/*
* Read in IPMP groupinfo list TLVs that follow.
*/
retval = ipmp_readgroupinfo_lists(statep, infop, &end);
if (retval != IPMP_SUCCESS)
break;
retval = ipmp_snap_addgroupinfo(snap, infop);
if (retval != IPMP_SUCCESS) {
ipmp_freegroupinfo(infop);
infop = NULL;
}
break;
default:
retval = IPMP_EPROTO;
break;
}
fail:
if (retval != IPMP_SUCCESS) {
free(infop);
free(osnap);
ipmp_snap_free(snap);
return (ipmp_querydone(statep, retval));
}
} while (snap->sn_grlistp == NULL || snap->sn_nif < osnap->sn_nif ||
snap->sn_ngroup < osnap->sn_ngroup ||
snap->sn_naddr < osnap->sn_naddr);
free(osnap);
*snapp = snap;
return (ipmp_querydone(statep, IPMP_SUCCESS));
}