[incubator-nuttx] branch master updated: sys/socket/scm: add more socket message control helper

[xi...@apache.org]

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xiaoxiang pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/incubator-nuttx.git


The following commit(s) were added to refs/heads/master by this push:
     new e8d7779  sys/socket/scm: add more socket message control helper
e8d7779 is described below

commit e8d7779ab1b82fa9de8f61f44a6528a29a0cddf9
Author: chao.an <an...@xiaomi.com>
AuthorDate: Thu Sep 2 22:27:42 2021 +0800

    sys/socket/scm: add more socket message control helper
    
    Signed-off-by: chao.an <an...@xiaomi.com>
---
 include/sys/socket.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/sys/socket.h b/include/sys/socket.h
index 57e2376..3653999 100644
--- a/include/sys/socket.h
+++ b/include/sys/socket.h
@@ -260,6 +260,14 @@
    (FAR struct cmsghdr *)NULL)
 #define CMSG_FIRSTHDR(msg) \
   __CMSG_FIRSTHDR((msg)->msg_control, (msg)->msg_controllen)
+#define CMSG_OK(mhdr, cmsg) ((cmsg)->cmsg_len >= sizeof(struct cmsghdr) && \
+                            (cmsg)->cmsg_len <= (unsigned long) \
+                            ((mhdr)->msg_controllen - \
+                             ((char *)(cmsg) - (char *)(mhdr)->msg_control)))
+#define for_each_cmsghdr(cmsg, msg) \
+       for (cmsg = CMSG_FIRSTHDR(msg); \
+            cmsg; \
+            cmsg = CMSG_NXTHDR(msg, cmsg))
 
 /* "Socket"-level control message types: */