#include "lib/util/iov_buf.h"
#include <sys/socket.h>
+ #if !defined(HAVE_STRUCT_MSGHDR_MSG_CONTROL) && !defined(HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS)
+ # error Can not pass file descriptors
+ #endif
+
ssize_t msghdr_prep_fds(struct msghdr *msg, uint8_t *buf, size_t bufsize,
const int *fds, size_t num_fds)
{
+#ifdef HAVE_STRUCT_MSGHDR_MSG_CONTROL
size_t fds_size = sizeof(int) * MIN(num_fds, INT8_MAX);
size_t cmsg_len = CMSG_LEN(fds_size);
size_t cmsg_space = CMSG_SPACE(fds_size);
msg->msg_controllen = cmsg->cmsg_len;
return cmsg_space;
+#else /* HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS */
+
+ if (num_fds == 0) {
+ if (msg != NULL) {
+ msg->msg_accrights = NULL;
+ msg->msg_accrightslen = 0;
+ }
+ return 0;
+ }
+ if (num_fds > INT8_MAX) {
+ return -1;
+ }
+ if ((msg == NULL) || (num_fds > bufsize)) {
+ return num_fds;
+ }
+
+ msg->accrights = buf;
+ msg->accrights_len = num_fds;
+
+ return num_fds;
+#endif
}
struct msghdr_buf {