3rd-party/linux-kernel-module-cheat
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netlink: move docs to README

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Ciro Santilli
2018-07-06 08:56:22 +01:00
parent 3d4e0c095d
commit e05eb91add
7 changed files with 72 additions and 29 deletions
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11
kernel_module/user/netlink.c
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@@ -1,3 +1,5 @@
/* https://github.com/cirosantilli/linux-kernel-module-cheat#netlink-sockets */
#include <linux/netlink.h>
#include <stdio.h>
#include <stdlib.h>
@@ -5,8 +7,9 @@
#include <sys/socket.h>
#include <unistd.h>
#include "../netlink.h"
#define MAX_PAYLOAD 1024
#define NETLINK_USER 31
/* Some of these structs fields must be zeroed.
* We could brute force memset them, but
@@ -40,10 +43,10 @@ int main()
msg.msg_namelen = sizeof(dest_addr);
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
printf("before sendmsg\n");
fprintf(stderr, "before sendmsg\n");
sendmsg(sock_fd, &msg, 0);
printf("after sendmsg\n");
fprintf(stderr, "after sendmsg\n");
recvmsg(sock_fd, &msg, 0);
printf("userland received: %s\n", (char *)NLMSG_DATA(nlh));
printf("%s\n", (char *)NLMSG_DATA(nlh));
close(sock_fd);
}