diff options
| -rw-r--r-- | util.h | 22 |
1 files changed, 22 insertions, 0 deletions
@@ -14,6 +14,9 @@ #include <string.h> #include <signal.h> #include <arpa/inet.h> +#include <unistd.h> +#include <sys/syscall.h> +#include <linux/close_range.h> #include "log.h" @@ -159,6 +162,25 @@ struct ctx; /* cppcheck-suppress funcArgNamesDifferent */ __attribute__ ((weak)) int ffsl(long int i) { return __builtin_ffsl(i); } + +#ifdef CLOSE_RANGE_UNSHARE /* Linux kernel >= 5.9 */ +/* glibc < 2.34 and musl as of 1.2.5 need these */ +#ifndef SYS_close_range +#define SYS_close_range 436 +#endif +__attribute__ ((weak)) +/* cppcheck-suppress funcArgNamesDifferent */ +int close_range(unsigned int first, unsigned int last, int flags) { + return syscall(SYS_close_range, first, last, flags); +} +#else +/* No reasonable fallback option */ +/* cppcheck-suppress funcArgNamesDifferent */ +int close_range(unsigned int first, unsigned int last, int flags) { + return 0; +} +#endif + int sock_l4_sa(const struct ctx *c, enum epoll_type type, const void *sa, socklen_t sl, const char *ifname, bool v6only, uint32_t data); |