diff options
Diffstat (limited to 'lib/recvfrom.c')
-rw-r--r-- | lib/recvfrom.c | 32 |
1 files changed, 21 insertions, 11 deletions
diff --git a/lib/recvfrom.c b/lib/recvfrom.c index 068f5a576..60c2ec1bf 100644 --- a/lib/recvfrom.c +++ b/lib/recvfrom.c @@ -32,17 +32,27 @@ ssize_t rpl_recvfrom (int fd, void *buf, size_t len, int flags, struct sockaddr *from, socklen_t *fromlen) { - int frombufsize = (from != NULL ? *fromlen : 0); SOCKET sock = FD_TO_SOCKET (fd); - int r = recvfrom (sock, buf, len, flags, from, fromlen); - if (r < 0) - set_winsock_errno (); - - /* Winsock recvfrom() only returns a valid 'from' when the socket is - connectionless. POSIX gives a valid 'from' for all types of sockets. */ - else if (from != NULL && *fromlen == frombufsize) - rpl_getpeername (fd, from, fromlen); - - return r; + if (sock == INVALID_SOCKET) + { + errno = EBADF; + return -1; + } + else + { + int frombufsize = (from != NULL ? *fromlen : 0); + int r = recvfrom (sock, buf, len, flags, from, fromlen); + + if (r < 0) + set_winsock_errno (); + + /* Winsock recvfrom() only returns a valid 'from' when the socket is + connectionless. POSIX gives a valid 'from' for all types of + sockets. */ + else if (from != NULL && *fromlen == frombufsize) + rpl_getpeername (fd, from, fromlen); + + return r; + } } |