55 lines
1.2 KiB
C
55 lines
1.2 KiB
C
#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/netlink.h>
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#include <net/sock.h>
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#include <linux/skbuff.h>
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#define NETLINK_USER_CUSTOM 31
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Leo");
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MODULE_DESCRIPTION("Netlink message logger for custom protocol");
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static struct sock *nl_sk = NULL;
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static void netlink_recv_msg(struct sk_buff *skb)
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{
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struct nlmsghdr *nlh;
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char *payload;
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if (!skb)
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return;
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nlh = nlmsg_hdr(skb);
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payload = (char *)nlmsg_data(nlh);
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pr_info("[netlink_logger] Received netlink msg: %s\n", payload); //此处打印信息
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}
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static int __init netlink_logger_init(void)
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{
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struct netlink_kernel_cfg cfg = {
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.input = netlink_recv_msg,
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};
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nl_sk = netlink_kernel_create(&init_net, NETLINK_USER_CUSTOM, &cfg);
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if (!nl_sk) {
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pr_err("[netlink_logger] Failed to create netlink socket\n");
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return -ENOMEM;
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}
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pr_info("[netlink_logger] Netlink logger module loaded (protocol: %d)\n", NETLINK_USER_CUSTOM);
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return 0;
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}
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static void __exit netlink_logger_exit(void)
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{
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if (nl_sk)
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netlink_kernel_release(nl_sk);
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pr_info("[netlink_logger] Module unloaded\n");
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}
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module_init(netlink_logger_init);
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module_exit(netlink_logger_exit);
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