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am 49076afc: am a5d83312: Merge "Use glibc structure for __cmsg_nxthdr."

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* commit '49076afc19a9f336cc958837cf56a6893de3c618':
  Use glibc structure for __cmsg_nxthdr.
This commit is contained in:
Calin Juravle 2014-04-09 09:11:11 +00:00 committed by Android Git Automerger
commit 08576fff6d
3 changed files with 42 additions and 17 deletions
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1
libc/Android.mk
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@ -120,6 +120,7 @@ libc_bionic_src_files := \
bionic/chown.cpp \
bionic/clock.cpp \
bionic/clone.cpp \
bionic/cmsg_nxthdr.cpp \
bionic/dirent.cpp \
bionic/dup2.cpp \
bionic/epoll_create.cpp \

39
libc/bionic/cmsg_nxthdr.cpp Normal file
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@ -0,0 +1,39 @@
/*
* Copyright (C) 2014 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/socket.h>
cmsghdr* cmsg_nxthdr(msghdr* msg, cmsghdr* cmsg) {
cmsghdr* ptr;
ptr = reinterpret_cast<cmsghdr*>(reinterpret_cast<char*>(cmsg) + CMSG_ALIGN(cmsg->cmsg_len));
size_t len = reinterpret_cast<char*>(ptr+1) - reinterpret_cast<char*>(msg->msg_control);
if (len > msg->msg_controllen) {
return NULL;
}
return ptr;
}

19
libc/include/sys/socket.h
View File

@ -107,7 +107,7 @@ struct cmsghdr {
int cmsg_type;
};
#define CMSG_NXTHDR(mhdr, cmsg) __cmsg_nxthdr((mhdr)->msg_control, (mhdr)->msg_controllen, (cmsg))
#define CMSG_NXTHDR(mhdr, cmsg) cmsg_nxthdr((mhdr), (cmsg))
#define CMSG_ALIGN(len) ( ((len)+sizeof(long)-1) & ~(sizeof(long)-1) )
#define CMSG_DATA(cmsg) ((void*)((char*)(cmsg) + CMSG_ALIGN(sizeof(struct cmsghdr))))
#define CMSG_SPACE(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + CMSG_ALIGN(len))
@ -117,22 +117,7 @@ struct cmsghdr {
? (struct cmsghdr*) (msg)->msg_control : (struct cmsghdr*) NULL)
#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)))
#ifdef __GNUC__
#define __KINLINE static __inline__
#elif defined(__cplusplus)
#define __KINLINE static inline
#else
#define __KINLINE static
#endif
__KINLINE struct cmsghdr* __cmsg_nxthdr(void* __ctl, size_t __size, struct cmsghdr* __cmsg) {
struct cmsghdr* __ptr;
__ptr = (struct cmsghdr*)(((unsigned char*) __cmsg) + CMSG_ALIGN(__cmsg->cmsg_len));
if ((unsigned long)((char*)(__ptr+1) - (char*) __ctl) > __size) {
return NULL;
}
return __ptr;
}
struct cmsghdr* cmsg_nxthdr(struct msghdr*, struct cmsghdr*);
#define SCM_RIGHTS 0x01
#define SCM_CREDENTIALS 0x02