nvlist_t *
nvlist_recv(int sock, int flags)
{
struct nvlist_header nvlhdr;
nvlist_t *nvl, *ret;
unsigned char *buf;
size_t nfds, size, i;
int *fds;
if (buf_recv(sock, &nvlhdr, sizeof(nvlhdr)) == -1)
return (NULL);
if (!nvlist_check_header(&nvlhdr))
return (NULL);
nfds = (size_t)nvlhdr.nvlh_descriptors;
size = sizeof(nvlhdr) + (size_t)nvlhdr.nvlh_size;
buf = nv_malloc(size);
if (buf == NULL)
return (NULL);
memcpy(buf, &nvlhdr, sizeof(nvlhdr));
ret = NULL;
fds = NULL;
if (buf_recv(sock, buf + sizeof(nvlhdr), size - sizeof(nvlhdr)) == -1)
goto out;
if (nfds > 0) {
fds = nv_malloc(nfds * sizeof(fds[0]));
if (fds == NULL)
goto out;
if (fd_recv(sock, fds, nfds) == -1)
goto out;
}
nvl = nvlist_xunpack(buf, size, fds, nfds, flags);
if (nvl == NULL) {
ERRNO_SAVE();
for (i = 0; i < nfds; i++)
close(fds[i]);
ERRNO_RESTORE();
goto out;
}
ret = nvl;
out:
ERRNO_SAVE();
nv_free(buf);
nv_free(fds);
ERRNO_RESTORE();
return (ret);
}
nvlist_t *
nvlist_recv(int sock)
{
struct nvlist_header nvlhdr;
nvlist_t *nvl, *ret;
unsigned char *buf;
size_t nfds, size;
int serrno, *fds;
if (buf_recv(sock, &nvlhdr, sizeof(nvlhdr)) == -1)
return (NULL);
if (!nvlist_check_header(&nvlhdr))
return (NULL);
nfds = (size_t)nvlhdr.nvlh_descriptors;
size = sizeof(nvlhdr) + (size_t)nvlhdr.nvlh_size;
buf = malloc(size);
if (buf == NULL)
return (NULL);
memcpy(buf, &nvlhdr, sizeof(nvlhdr));
ret = NULL;
fds = NULL;
if (buf_recv(sock, buf + sizeof(nvlhdr), size - sizeof(nvlhdr)) == -1)
goto out;
if (nfds > 0) {
fds = malloc(nfds * sizeof(fds[0]));
if (fds == NULL)
goto out;
if (fd_recv(sock, fds, nfds) == -1)
goto out;
}
nvl = nvlist_xunpack(buf, size, fds, nfds);
if (nvl == NULL)
goto out;
ret = nvl;
out:
serrno = errno;
free(buf);
free(fds);
errno = serrno;
return (ret);
}
const unsigned char *
nvlist_unpack_header(nvlist_t *nvl, const unsigned char *ptr, size_t nfds,
bool *isbep, size_t *leftp)
{
struct nvlist_header nvlhdr;
int inarrayf;
if (*leftp < sizeof(nvlhdr))
goto fail;
memcpy(&nvlhdr, ptr, sizeof(nvlhdr));
if (!nvlist_check_header(&nvlhdr))
goto fail;
if (nvlhdr.nvlh_size != *leftp - sizeof(nvlhdr))
goto fail;
/*
* nvlh_descriptors might be smaller than nfds in embedded nvlists.
*/
if (nvlhdr.nvlh_descriptors > nfds)
goto fail;
if ((nvlhdr.nvlh_flags & ~NV_FLAG_ALL_MASK) != 0)
goto fail;
inarrayf = (nvl->nvl_flags & NV_FLAG_IN_ARRAY);
nvl->nvl_flags = (nvlhdr.nvlh_flags & NV_FLAG_PUBLIC_MASK) | inarrayf;
ptr += sizeof(nvlhdr);
if (isbep != NULL)
*isbep = (((int)nvlhdr.nvlh_flags & NV_FLAG_BIG_ENDIAN) != 0);
*leftp -= sizeof(nvlhdr);
return (ptr);
fail:
ERRNO_SET(EINVAL);
return (NULL);
}
static const unsigned char *
nvlist_unpack_header(nvlist_t *nvl, const unsigned char *ptr, size_t nfds,
int *flagsp, size_t *leftp)
{
struct nvlist_header nvlhdr;
if (*leftp < sizeof(nvlhdr))
goto failed;
memcpy(&nvlhdr, ptr, sizeof(nvlhdr));
if (!nvlist_check_header(&nvlhdr))
goto failed;
if (nvlhdr.nvlh_size != *leftp - sizeof(nvlhdr))
goto failed;
/*
* nvlh_descriptors might be smaller than nfds in embedded nvlists.
*/
if (nvlhdr.nvlh_descriptors > nfds)
goto failed;
if ((nvlhdr.nvlh_flags & ~NV_FLAG_ALL_MASK) != 0)
goto failed;
nvl->nvl_flags = (nvlhdr.nvlh_flags & NV_FLAG_PUBLIC_MASK);
ptr += sizeof(nvlhdr);
*flagsp = (int)nvlhdr.nvlh_flags;
*leftp -= sizeof(nvlhdr);
return (ptr);
failed:
errno = EINVAL;
return (NULL);
}