static nss_status_t
copy_output(void *outdata, int outdlen,
nss_pheader_t *phdr, nss_pheader_t *outphdr)
{
void *dp;
nss_status_t ret = NSS_SUCCESS;
char *me = "copy_output";
if (outdata != NULL && phdr->data_off > 0 && phdr->data_len > 0) {
if (phdr->data_len <= outdlen) {
dp = (char *)phdr + phdr->data_off;
(void) memmove(outdata, dp, phdr->data_len);
} else {
_NSCD_LOG(NSCD_LOG_FRONT_END, NSCD_LOG_LEVEL_DEBUG)
(me, "output buffer not large enough "
" should be > %d but is %d\n",
phdr->data_len, outdlen);
if (outphdr != NULL) {
NSCD_SET_N2N_STATUS(phdr, NSS_NSCD_PRIV,
0, NSCD_INVALID_ARGUMENT);
NSCD_COPY_STATUS(outphdr, phdr);
}
ret = NSS_NSCD_PRIV;
}
}
return (ret);
}
nss_status_t
_nscd_doorcall_data(int callnum, void *indata, int indlen,
void *outdata, int outdlen, nss_pheader_t *phdr)
{
void *uptr;
size_t buflen;
void *dptr;
void *datap;
size_t ndata;
size_t adata;
nss_pheader_t *phdr_d;
int ret;
char *me = "_nscd_doorcall_data";
_NSCD_LOG(NSCD_LOG_FRONT_END, NSCD_LOG_LEVEL_DEBUG)
(me, "processing door call %d ...\n", callnum);
/* allocate door buffer from the stack */
NSCD_ALLOC_DOORBUF(callnum, indlen, uptr, buflen);
dptr = uptr;
ndata = buflen;
adata = buflen;
datap = NSCD_N2N_DOOR_DATA(void, dptr);
if (indata != NULL)
(void) memmove(datap, indata, indlen);
ret = _nsc_trydoorcall(&dptr, &ndata, &adata);
phdr_d = (nss_pheader_t *)dptr;
if (ret != NSS_SUCCESS) {
_NSCD_LOG(NSCD_LOG_FRONT_END, NSCD_LOG_LEVEL_DEBUG)
(me, "door call (%d) failed (status = %d, error = %s)\n",
callnum, ret, strerror(NSCD_GET_ERRNO(phdr_d)));
} else {
if (phdr != NULL) {
NSCD_COPY_STATUS(phdr, phdr_d);
}
ret = copy_output(outdata, outdlen, phdr_d, phdr);
}
/* if new buffer allocated for this door call, free it */
if (dptr != uptr)
(void) munmap(dptr, ndata);
return (ret);
}
void
_nscd_proc_alt_get(
void *buf,
int *door)
{
int errnum;
uid_t set2uid;
gid_t set2gid;
nss_pheader_t *phdr = (nss_pheader_t *)buf;
char *me = "_nscd_proc_alt_get";
ucred_t *uc = NULL;
child_t *ch;
_NSCD_LOG(NSCD_LOG_SELF_CRED, NSCD_LOG_LEVEL_DEBUG)
(me, "getting an alternate door ...\n");
/* make sure there is a door to talk to the forker */
if (forking_door == -1) {
_NSCD_LOG(NSCD_LOG_SELF_CRED, NSCD_LOG_LEVEL_ERROR)
(me, "no door to talk to the forker\n");
NSCD_RETURN_N2N_STATUS(phdr, NSS_NSCD_PRIV, 0,
NSCD_SELF_CRED_NO_FORKER);
}
/* get door client's credential information */
if (door_ucred(&uc) != 0) {
errnum = errno;
_NSCD_LOG(NSCD_LOG_SELF_CRED, NSCD_LOG_LEVEL_DEBUG)
(me, "door_ucred failed: %s\n", strerror(errnum));
NSCD_RETURN_N2N_STATUS(phdr, NSS_NSCD_PRIV, errnum,
NSCD_DOOR_UCRED_ERROR);
}
/* get door client's effective uid and effective gid */
set2uid = ucred_geteuid(uc);
set2gid = ucred_getegid(uc);
ucred_free(uc);
uc = NULL;
_NSCD_LOG(NSCD_LOG_SELF_CRED, NSCD_LOG_LEVEL_DEBUG)
(me, "child uid = %d, gid = %d\n", set2uid, set2gid);
/* is a slot available ? if not, no one to serve */
if (child == NULL || (ch = get_cslot(set2uid, 0)) == NULL) {
_NSCD_LOG(NSCD_LOG_SELF_CRED, NSCD_LOG_LEVEL_DEBUG)
(me, "no child slot available (child array = %p, slot = %d)\n",
child, ch->child_slot);
NSCD_RETURN_N2N_STATUS(phdr, NSS_NSCD_PRIV, 0,
NSCD_SELF_CRED_NO_CHILD_SLOT);
}
/* create the per user nscd if necessary */
if (ch->child_state != CHILD_STATE_PIDKNOWN) {
nss_pheader_t phdr1;
NSCD_CLEAR_STATUS(&phdr1);
(void) mutex_lock(ch->mutex);
if (ch->child_state == CHILD_STATE_UIDKNOWN) {
/* ask forker to fork a new child */
selfcred_fork(&phdr1, forking_door, ch->child_slot,
set2uid, set2gid);
if (NSCD_STATUS_IS_NOT_OK(&phdr1)) {
(void) mutex_unlock(ch->mutex);
NSCD_COPY_STATUS(phdr, &phdr1);
return;
}
ch->child_state = CHILD_STATE_FORKSENT;
}
_NSCD_LOG(NSCD_LOG_SELF_CRED, NSCD_LOG_LEVEL_DEBUG)
(me, "waiting for door (slot = %d, uid = %d, gid = %d)\n",
ch->child_slot, set2uid, set2gid);
/* wait for the per user nscd to become available */
while (ch->child_state == CHILD_STATE_FORKSENT) {
timestruc_t to;
int err;
int ttl = 5;
to.tv_sec = ttl;
to.tv_nsec = 0;
_NSCD_LOG(NSCD_LOG_SELF_CRED, NSCD_LOG_LEVEL_DEBUG)
(me, "cond_reltimedwait %d seconds\n", ttl);
err = cond_reltimedwait(ch->cond, ch->mutex, &to);
if (err == ETIME) {
ch->child_state = CHILD_STATE_UIDKNOWN;
_NSCD_LOG(NSCD_LOG_SELF_CRED,
NSCD_LOG_LEVEL_DEBUG)
(me, "door wait timedout (slot = %d)\n",
ch->child_slot);
break;
}
}
(void) mutex_unlock(ch->mutex);
}
if (ch->child_state != CHILD_STATE_PIDKNOWN) {
NSCD_RETURN_N2N_STATUS(phdr, NSS_NSCD_PRIV, 0,
NSCD_SELF_CRED_INVALID_SLOT_STATE);
}
*door = ch->child_door;
_NSCD_LOG(NSCD_LOG_SELF_CRED, NSCD_LOG_LEVEL_DEBUG)
(me, "returning door %d for slot %d, uid %d, gid = %d\n",
*door, ch->child_slot, set2uid, set2gid);
NSCD_RETURN_STATUS(phdr, NSS_ALTRETRY, 0);
}
nss_status_t
_nscd_doorcall_fd(int fd, int callnum, void *indata, int indlen,
void *outdata, int outdlen, nss_pheader_t *phdr)
{
void *uptr;
void *dptr;
void *datap;
size_t ndata;
size_t adata;
size_t buflen;
door_arg_t param;
int ret, errnum;
nss_pheader_t *phdr_d;
char *me = "_nscd_doorcall_fd";
_NSCD_LOG(NSCD_LOG_FRONT_END, NSCD_LOG_LEVEL_DEBUG)
(me, "processing door call %d (fd = %d)...\n", callnum, fd);
/* allocate door buffer from the stack */
NSCD_ALLOC_DOORBUF(callnum, indlen, uptr, buflen);
dptr = uptr;
ndata = buflen;
adata = buflen;
datap = NSCD_N2N_DOOR_DATA(void, dptr);
if (indata != NULL)
(void) memmove(datap, indata, indlen);
param.rbuf = (char *)dptr;
param.rsize = ndata;
param.data_ptr = (char *)dptr;
param.data_size = adata;
param.desc_ptr = NULL;
param.desc_num = 0;
ret = door_call(fd, ¶m);
if (ret < 0) {
errnum = errno;
/*
* door call did not get through, return errno
* if requested
*/
if (phdr != NULL) {
NSCD_SET_STATUS(phdr, NSS_ERROR, errnum);
}
_NSCD_LOG(NSCD_LOG_FRONT_END, NSCD_LOG_LEVEL_DEBUG)
(me, "door call (%d to %d) did not get through (%s)\n",
callnum, fd, strerror(errnum));
return (NSS_ERROR);
}
ndata = param.rsize;
dptr = (void *)param.data_ptr;
/*
* door call got through, check if operation failed.
* if so, return error info if requested
*/
phdr_d = (nss_pheader_t *)dptr;
ret = NSCD_GET_STATUS(phdr_d);
if (ret != NSS_SUCCESS) {
if (phdr != NULL) {
NSCD_COPY_STATUS(phdr, phdr_d);
}
_NSCD_LOG(NSCD_LOG_FRONT_END, NSCD_LOG_LEVEL_DEBUG)
(me, "door call (%d to %d) failed: p_status = %d, "
"p_errno = %s, nscd status = %d\n", callnum, fd,
ret, strerror(NSCD_GET_ERRNO(phdr_d)),
NSCD_GET_NSCD_STATUS(phdr_d));
} else
ret = copy_output(outdata, outdlen, phdr_d, phdr);
/* if new buffer allocated for this door call, free it */
if (dptr != uptr)
(void) munmap(dptr, param.rsize);
return (ret);
}
