[spice-server v4 3/6] net: Introduce red_socket_set_non_blocking() helper

[Christophe Fergeau <cfergeau@xxxxxxxxxx>]

This allows to move some low-level code out of reds.c

Signed-off-by: Christophe Fergeau <cfergeau@xxxxxxxxxx>
---
 server/net-utils.c | 30 ++++++++++++++++++++++++++++++
 server/net-utils.h |  1 +
 server/reds.c      | 13 ++-----------
 3 files changed, 33 insertions(+), 11 deletions(-)

diff --git a/server/net-utils.c b/server/net-utils.c
index 10f447b..b017daa 100644
--- a/server/net-utils.c
+++ b/server/net-utils.c
@@ -52,3 +52,33 @@ bool red_socket_set_no_delay(int fd, bool no_delay)
 
     return true;
 }
+
+/**
+ * red_socket_set_non_blocking:
+ * @fd: a socket file descriptor
+ * @non_blocking: whether to enable O_NONBLOCK on @fd
+ *
+ * Returns: #true if the operation succeeded, #false otherwise.
+ */
+bool red_socket_set_non_blocking(int fd, bool non_blocking)
+{
+    int flags;
+
+    if ((flags = fcntl(fd, F_GETFL)) == -1) {
+        spice_warning("fnctl(F_GETFL) failed, %s", strerror(errno));
+        return false;
+    }
+
+    if (non_blocking) {
+        flags |= O_NONBLOCK;
+    } else {
+        flags &= ~O_NONBLOCK;
+    }
+
+    if (fcntl(fd, F_SETFL, flags) == -1) {
+        spice_warning("fnctl(F_SETFL) failed, %s", strerror(errno));
+        return false;
+    }
+
+    return true;
+}
diff --git a/server/net-utils.h b/server/net-utils.h
index 9f4932e..023bc6b 100644
--- a/server/net-utils.h
+++ b/server/net-utils.h
@@ -21,5 +21,6 @@
 #include <stdbool.h>
 
 bool red_socket_set_no_delay(int fd, bool no_delay);
+bool red_socket_set_non_blocking(int fd, bool non_blocking);
 
 #endif
diff --git a/server/reds.c b/server/reds.c
index 653a045..2f2dad8 100644
--- a/server/reds.c
+++ b/server/reds.c
@@ -31,8 +31,6 @@
 #include <limits.h>
 #include <pthread.h>
 #include <sys/mman.h>
-#include <fcntl.h>
-#include <errno.h>
 #include <ctype.h>
 
 #include <openssl/err.h>
@@ -2406,16 +2404,9 @@ static bool reds_init_keepalive(int socket)
 static RedLinkInfo *reds_init_client_connection(RedsState *reds, int socket)
 {
     RedLinkInfo *link;
-    int flags;
 
-    if ((flags = fcntl(socket, F_GETFL)) == -1) {
-        spice_warning("accept failed, %s", strerror(errno));
-        goto error;
-    }
-
-    if (fcntl(socket, F_SETFL, flags | O_NONBLOCK) == -1) {
-        spice_warning("accept failed, %s", strerror(errno));
-        goto error;
+    if (!red_socket_set_non_blocking(socket, TRUE)) {
+       goto error;
     }
 
     if (!red_socket_set_no_delay(socket, TRUE)) {
-- 
2.9.3

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