mirror of
https://github.com/cirosantilli/linux-kernel-module-cheat.git
synced 2026-01-23 18:25:57 +01:00
56738a1c70
Unsquashed version at v2-rc-unsquashed, but that cannot be merged as it breaks bisects at several points. All bugs will not bisect to this humongous change. It all started with a conversion of the Bash scripts to Python, mainly because I couldn't stand not being able to properly use --options for run which has a million options. Then since that required a full testing, I decided to do all the refactorings that I had in mind at once, and so I did and it became v2-rc. This is the largest patch I have ever done! OMG a few weeks of extra time. I'm never writing a Bash script for anything that starts getting big again. Some of the features are: * separate build-qemu and build-gem5 commands * common: convert scripts to python. Add --option for everything * rename build to build-buildroot now that we are splitting all the build commands, Linux kernel to follow * move all git submodules to submodules/ and all buildroot packages to packages/ * refactor the out/ structure. Keep projects on toplevel, because guest projects separate archs and host ones don't, making a toplevel arch wrong * do-release: rename to just release https://stackoverflow.com/questions/16174992/cant-get-argparse-to-read-quoted-string-with-dashes-in-it * run: add --terminal and explain gem5 pdb * just track the lvimrc * store CLI kernel config fragment inside buildlroot to avoid conflicts * gem5: document m5 initparam * readme: make a bunch of things awesomer * readme: fix broken refs * parsec-benchmark: update to 75d55ac446a43c47efb1044844a108c6c330184c Could not fetch otherwise. * gem5: M5_OVERRIDE_PY_SOURCE
53 lines
1.4 KiB
C
53 lines
1.4 KiB
C
/* https://github.com/cirosantilli/linux-kernel-module-cheat#netlink-sockets */
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#include <linux/netlink.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <unistd.h>
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#include "../netlink.h"
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#define MAX_PAYLOAD 1024
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/* Some of these structs fields must be zeroed.
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* We could brute force memset them, but
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* TODO determine exactly which, and move into main. */
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int sock_fd;
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struct iovec iov;
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struct msghdr msg;
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struct nlmsghdr *nlh;
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struct sockaddr_nl src_addr, dest_addr;
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int main()
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{
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sock_fd = socket(PF_NETLINK, SOCK_RAW, NETLINK_USER);
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if (sock_fd < 0) {
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perror("socket");
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return EXIT_FAILURE;
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}
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src_addr.nl_family = AF_NETLINK;
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src_addr.nl_pid = getpid();
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bind(sock_fd, (struct sockaddr *)&src_addr, sizeof(src_addr));
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dest_addr.nl_family = AF_NETLINK;
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nlh = (struct nlmsghdr *)malloc(NLMSG_SPACE(MAX_PAYLOAD));
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memset(nlh, 0, NLMSG_SPACE(MAX_PAYLOAD));
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nlh->nlmsg_len = NLMSG_SPACE(MAX_PAYLOAD);
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nlh->nlmsg_pid = getpid();
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nlh->nlmsg_flags = 0;
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strcpy(NLMSG_DATA(nlh), "user request");
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iov.iov_base = (void *)nlh;
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iov.iov_len = nlh->nlmsg_len;
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msg.msg_name = (void *)&dest_addr;
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msg.msg_namelen = sizeof(dest_addr);
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msg.msg_iov = &iov;
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msg.msg_iovlen = 1;
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fprintf(stderr, "before sendmsg\n");
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sendmsg(sock_fd, &msg, 0);
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fprintf(stderr, "after sendmsg\n");
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recvmsg(sock_fd, &msg, 0);
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printf("%s\n", (char *)NLMSG_DATA(nlh));
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close(sock_fd);
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}
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