RepoMirrors
/
musl
mirror of git://git.musl-libc.org/musl
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
musl/arch/x86_64/bits/socket.h

19 lines
268 B
C
Raw Normal View History

Port musl to x86-64. One giant commit!
2011-02-15 12:32:09 +00:00
struct msghdr
{
void *msg_name;
socklen_t msg_namelen;
struct iovec *msg_iov;
workaround broken msghdr struct on 64bit linux POSIX clearly specifies the type of msg_iovlen and msg_controllen, and Linux ignores it and makes them both size_t instead. to work around this we add padding (instead of just using the wrong types like glibc does), but we also need to patch-up the struct before passing it to the kernel in case the caller did not zero-fill it. if i could trust the kernel to just ignore the upper 32 bits, this would not be necessary, but i don't think it will ignore them...
2011-04-08 13:24:19 +00:00
int msg_iovlen, __pad1;
Port musl to x86-64. One giant commit!
2011-02-15 12:32:09 +00:00
void *msg_control;
workaround broken msghdr struct on 64bit linux POSIX clearly specifies the type of msg_iovlen and msg_controllen, and Linux ignores it and makes them both size_t instead. to work around this we add padding (instead of just using the wrong types like glibc does), but we also need to patch-up the struct before passing it to the kernel in case the caller did not zero-fill it. if i could trust the kernel to just ignore the upper 32 bits, this would not be necessary, but i don't think it will ignore them...
2011-04-08 13:24:19 +00:00
socklen_t msg_controllen, __pad2;
Port musl to x86-64. One giant commit!
2011-02-15 12:32:09 +00:00
int msg_flags;
};
workaround another sendmsg kernel bug on 64-bit machines the kernel wrongly expects the cmsg length field to be size_t instead of socklen_t. in order to work around the issue, we have to impose a length limit and copy to a local buffer. the length limit should be more than sufficient for any real-world use; these headers are only used for passing file descriptors and permissions between processes over unix sockets.
2012-07-13 01:37:54 +00:00
struct cmsghdr
{
socklen_t cmsg_len;
int __pad1;
int cmsg_level;
int cmsg_type;
};