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Handle old kernels that don't do NETLINK_NO_ENOBUFS.

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Deal with both old kernel header files that don't define it,
and old kernels that don't implement it.

Also generalise Linux kernel version handling.
This commit is contained in:
Simon Kelley
2020-03-19 21:56:45 +00:00
parent e7ee1aa093
commit 0506a5ed4e
5 changed files with 40 additions and 20 deletions
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6
src/dnsmasq.h
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@@ -141,6 +141,7 @@ typedef unsigned long long u64;
#endif
#if defined(HAVE_LINUX_NETWORK)
#include <linux/version.h>
#include <linux/sockios.h>
#include <linux/capability.h>
/* There doesn't seem to be a universally-available
@@ -1108,7 +1109,7 @@ extern struct daemon {
int inotifyfd;
#endif
#if defined(HAVE_LINUX_NETWORK)
int netlinkfd;
int netlinkfd, kernel_version;
#elif defined(HAVE_BSD_NETWORK)
int dhcp_raw_fd, dhcp_icmp_fd, routefd;
#endif
@@ -1288,6 +1289,9 @@ int read_write(int fd, unsigned char *packet, int size, int rw);
void close_fds(long max_fd, int spare1, int spare2, int spare3);
int wildcard_match(const char* wildcard, const char* match);
int wildcard_matchn(const char* wildcard, const char* match, int num);
#ifdef HAVE_LINUX_NETWORK
int kernel_version(void);
#endif
/* log.c */
void die(char *message, char *arg1, int exit_code) ATTRIBUTE_NORETURN;