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authorEric Andersen <andersen@codepoet.org>2006-11-04 18:33:04 +0000
committerEric Andersen <andersen@codepoet.org>2006-11-04 18:33:04 +0000
commit2e09dbcacee815cef140612e0e27bfbc61eeed46 (patch)
treed99d8ad3988d0d50474b482b2b33b0ca8dd48e59 /libc/sysdeps/linux/common/bits/socket.h
parent36860e64dbe0a6d294ec3b1430e7926ea0ed2fd5 (diff)
based on a patch from Atsushi Nemoto:
There is a mismatch of struct msghdr between the kernel and libc. In a 64-bit environment, the size of msg_namelen is 4 for all, but the size of msg_iovlen and msg_controllen is 8 bytes for the kernel and for glibc, but 4 bytes for uClibc. Fix size for the 64bit case.
Diffstat (limited to 'libc/sysdeps/linux/common/bits/socket.h')
-rw-r--r--libc/sysdeps/linux/common/bits/socket.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/common/bits/socket.h b/libc/sysdeps/linux/common/bits/socket.h
index cc13c4874..2f3dc797b 100644
--- a/libc/sysdeps/linux/common/bits/socket.h
+++ b/libc/sysdeps/linux/common/bits/socket.h
@@ -215,16 +215,26 @@ enum
/* Note: do not change these members to match glibc; these match the
SuSv3 spec already (e.g. msg_iovlen/msg_controllen).
http://www.opengroup.org/onlinepubs/009695399/basedefs/sys/socket.h.html */
+/* Note: linux kernel uses __kernel_size_t (which is 8bytes on 64bit
+ platforms, and 4bytes on 32bit platforms) for msg_iovlen/msg_controllen */
struct msghdr
{
void *msg_name; /* Address to send to/receive from. */
socklen_t msg_namelen; /* Length of address data. */
struct iovec *msg_iov; /* Vector of data to send/receive into. */
+#if __WORDSIZE == 32
int msg_iovlen; /* Number of elements in the vector. */
+#else
+ size_t msg_iovlen; /* Number of elements in the vector. */
+#endif
void *msg_control; /* Ancillary data (eg BSD filedesc passing). */
+#if __WORDSIZE == 32
socklen_t msg_controllen; /* Ancillary data buffer length. */
+#else
+ size_t msg_controllen; /* Ancillary data buffer length. */
+#endif
int msg_flags; /* Flags on received message. */
};