search for: cmsg_nxthdr

as the next klibc release 1.5.16 looks like shaping up, I have a trouble to build that for Debian. currently I build depent on linux-libc-dev, I don't know what against I can build latest klibc, see klibc fails to build due too: make -C linux/ ARCH=x86_64 INSTALL_HDR_PATH=debian/tmp/usr/lib/klibc/ headers_install make[3]: *** No rule to make target `headers_install'. Stop. make[2]: ***

.../ + +struct cmsghdr { + __kernel_size_t cmsg_len; /* data byte count, including hdr */ + int cmsg_level; /* originating protocol */ + int cmsg_type; /* protocol-specific type */ +}; + +/* + * Ancilliary data object information MACROS + * Table 5-14 of POSIX 1003.1g + */ + +#define __CMSG_NXTHDR(ctl, len, cmsg) __cmsg_nxthdr((ctl),(len),(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...

...1; #ifdef IP_PKTINFO struct in_pktinfo pktinfo; #endif === 105 if ( msg.msg_controllen < sizeof(struct cmsghdr) || === 109 for ( cmptr = CMSG_FIRSTHDR(&msg) ; cmptr != NULL ; I added the following to recvfrom.h (copied from glibc headers) === #define MSG_CTRUNC 0x08 #define CMSG_NXTHDR(mhdr, cmsg) __cmsg_nxthdr (mhdr, cmsg) #define CMSG_FIRSTHDR(mhdr) \ ((size_t) (mhdr)->msg_controllen >= sizeof (struct cmsghdr) \ ? (struct cmsghdr *) (mhdr)->msg_control : (struct cmsghdr *) NULL) extern struct cmsghdr *__cmsg_nxthdr __P ((struct msghdr *__mhdr,...

...ollen = CMSG_SPACE(sizeof(int)); + + do ret = recvmsg(socket, &message, MSG_WAITALL); + while (ret == -1 && (errno == EINTR || errno == EAGAIN)); + + if (ret <= 0) + return -1; + + for(control_message = CMSG_FIRSTHDR(&message); + control_message != NULL; + control_message = CMSG_NXTHDR(&message, + control_message)) + { + if( (control_message->cmsg_level == SOL_SOCKET) && + (control_message->cmsg_type == SCM_RIGHTS) ) + { + return *((int *) CMSG_DATA(control_message)); + } + } + + return -1; +} + /* Send a file-list index using a byte-reduction method...

Hi, This is a proof of concept of GPU forwarding for Linux guest on Linux host. I'd like to get comments and suggestions from community before I put more time on it. To summarize what it is: 1. It's a solution to bring GPU acceleration for Linux vm guest on Linux host. It could works with different GPU although the current proof of concept only works with Intel GPU. 2. The basic idea