net.c: make it compile without ucred

This patch is ugly as hell and only compile-tested. It obviously
needs more work (or a totally different approch like using the usual
send/recv functions in case ucred is not available).

MacOs testers are welcome.

diff --git a/net.c b/net.c
index 4d2f520f23170aef7f84e4aeea52c43616400266..5af967b99b13313565bb3ab830457c5cb607b414 100644 (file)
--- a/net.c
+++ b/net.c
@@ -27,6 +27,13 @@
 extern void (*crypt_function_recv)(unsigned long len, const unsigned char *indata, unsigned char *outdata);
 extern void (*crypt_function_send)(unsigned long len, const unsigned char *indata, unsigned char *outdata);
 
+
+#ifndef HAVE_UCRED
+       struct ucred {
+       uid_t uid, pid, gid;
+};
+#endif /* HAVE_UCRED */
+
 /**
  * initialize a struct sockaddr_in
  * @param addr A pointer to the struct to be initialized
@@ -363,6 +370,7 @@ ssize_t send_cred_buffer(int sock, char *buf)
        msg.msg_iovlen = 1;
        msg.msg_control = control;
        msg.msg_controllen = sizeof(control);
+#ifdef HAVE_UCRED
        /* attach the ucred struct */
        cmsg = CMSG_FIRSTHDR(&msg);
        cmsg->cmsg_level = SOL_SOCKET;
@@ -370,6 +378,7 @@ ssize_t send_cred_buffer(int sock, char *buf)
        cmsg->cmsg_len = CMSG_LEN(sizeof(struct ucred));
        *(struct ucred *)CMSG_DATA(cmsg) = c;
        msg.msg_controllen = cmsg->cmsg_len;
+#endif
        ret = sendmsg(sock, &msg, 0);
        if (ret  < 0)
                ret = -E_SENDMSG;
@@ -390,7 +399,6 @@ static void dispose_fds(int *fds, int num)
  * \param fd the socket file descriptor
  * \param buf the buffer to store the message
  * \param size the size of \a buffer
- * \param cred the credentials are returned here
  *
  * \return negative on errors, the user id on success.
  *
@@ -403,11 +411,13 @@ int recv_cred_buffer(int fd, char *buf, size_t size)
        struct msghdr msg;
        struct cmsghdr *cmsg;
        struct iovec iov;
-       int result;
+       int result = 0;
        int yes = 1;
        struct ucred cred;
 
+#ifdef HAVE_UCRED
        setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &yes, sizeof(int));
+#endif
        memset(&msg, 0, sizeof(msg));
        memset(buf, 0, size);
        iov.iov_base = buf;
@@ -418,6 +428,7 @@ int recv_cred_buffer(int fd, char *buf, size_t size)
        msg.msg_controllen = sizeof(control);
        if (recvmsg(fd, &msg, 0) < 0)
                return -E_RECVMSG;
+#ifdef HAVE_UCRED
        result = -E_SCM_CREDENTIALS;
        cmsg = CMSG_FIRSTHDR(&msg);
        while (cmsg) {
@@ -434,6 +445,7 @@ int recv_cred_buffer(int fd, char *buf, size_t size)
                        }
                cmsg = CMSG_NXTHDR(&msg, cmsg);
        }
+#endif
        return result;
 }
 
@@ -447,7 +459,7 @@ int recv_cred_buffer(int fd, char *buf, size_t size)
  * \return The file descriptor of the created socket, negative
  * on errors.
  *
- * \sa  get_socket()
+ * \sa get_socket()
  * \sa setsockopt(2)
  * \sa bind(2)
  * \sa listen(2)