diff options
Diffstat (limited to 'util.h')
| -rw-r--r-- | util.h | 126 |
1 files changed, 103 insertions, 23 deletions
@@ -9,8 +9,14 @@ #include <stdlib.h> #include <stdarg.h> #include <stdbool.h> +#include <stddef.h> +#include <stdint.h> +#include <stdio.h> #include <string.h> #include <signal.h> +#include <arpa/inet.h> +#include <unistd.h> +#include <sys/syscall.h> #include "log.h" @@ -31,6 +37,9 @@ #ifndef ETH_MIN_MTU #define ETH_MIN_MTU 68 #endif +#ifndef IP_MAX_MTU +#define IP_MAX_MTU USHRT_MAX +#endif #ifndef MIN #define MIN(x, y) (((x) < (y)) ? (x) : (y)) @@ -40,12 +49,10 @@ #endif #define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d)) +#define DIV_ROUND_CLOSEST(n, d) (((n) + (d) / 2) / (d)) #define ROUND_DOWN(x, y) ((x) & ~((y) - 1)) #define ROUND_UP(x, y) (((x) + (y) - 1) & ~((y) - 1)) -#define ALIGN_DOWN(n, m) ((n) / (m) * (m)) -#define ALIGN_UP(n, m) ALIGN_DOWN((n) + (m) - 1, (m)) - #define MAX_FROM_BITS(n) (((1U << (n)) - 1)) #define BIT(n) (1UL << (n)) @@ -60,6 +67,15 @@ #define STRINGIFY(x) #x #define STR(x) STRINGIFY(x) +#ifdef CPPCHECK_6936 +/* Some cppcheck versions get confused by aborts inside a loop, causing + * it to give false positive uninitialised variable warnings later in + * the function, because it doesn't realise the non-initialising path + * already exited. See https://trac.cppcheck.net/ticket/13227 + */ +#define ASSERT(expr) \ + ((expr) ? (void)0 : abort()) +#else #define ASSERT(expr) \ do { \ if (!(expr)) { \ @@ -71,6 +87,7 @@ abort(); \ } \ } while (0) +#endif #ifdef P_tmpdir #define TMPDIR P_tmpdir @@ -84,13 +101,13 @@ #define ARRAY_SIZE(a) ((int)(sizeof(a) / sizeof((a)[0]))) +#define foreach(item, array) \ + for ((item) = (array); (item) - (array) < ARRAY_SIZE(array); (item)++) + #define IN_INTERVAL(a, b, x) ((x) >= (a) && (x) <= (b)) #define FD_PROTO(x, proto) \ (IN_INTERVAL(c->proto.fd_min, c->proto.fd_max, (x))) -#define PORT_EPHEMERAL_MIN ((1 << 15) + (1 << 14)) /* RFC 6335 */ -#define PORT_IS_EPHEMERAL(port) ((port) >= PORT_EPHEMERAL_MIN) - #define MAC_ZERO ((uint8_t [ETH_ALEN]){ 0 }) #define MAC_IS_ZERO(addr) (!memcmp((addr), MAC_ZERO, ETH_ALEN)) @@ -113,7 +130,21 @@ #define htonl_constant(x) (__bswap_constant_32(x)) #endif -#define barrier() do { __asm__ __volatile__("" ::: "memory"); } while (0) +/** + * ntohl_unaligned() - Read 32-bit BE value from a possibly unaligned address + * @p: Pointer to the BE value in memory + * + * Returns: Host-order value of 32-bit BE quantity at @p + */ +static inline uint32_t ntohl_unaligned(const void *p) +{ + uint32_t val; + + memcpy(&val, p, sizeof(val)); + return ntohl(val); +} + +static inline void barrier(void) { __asm__ __volatile__("" ::: "memory"); } #define smp_mb() do { barrier(); __atomic_thread_fence(__ATOMIC_SEQ_CST); } while (0) #define smp_mb_release() do { barrier(); __atomic_thread_fence(__ATOMIC_RELEASE); } while (0) #define smp_mb_acquire() do { barrier(); __atomic_thread_fence(__ATOMIC_ACQUIRE); } while (0) @@ -121,50 +152,94 @@ #define smp_wmb() smp_mb_release() #define smp_rmb() smp_mb_acquire() -#define NS_FN_STACK_SIZE (RLIMIT_STACK_VAL * 1024 / 8) +#define NS_FN_STACK_SIZE (1024 * 1024) /* 1MiB */ + int do_clone(int (*fn)(void *), char *stack_area, size_t stack_size, int flags, void *arg); #define NS_CALL(fn, arg) \ do { \ - char ns_fn_stack[NS_FN_STACK_SIZE]; \ + char ns_fn_stack[NS_FN_STACK_SIZE] \ + __attribute__ ((aligned(__alignof__(max_align_t)))); \ \ do_clone((fn), ns_fn_stack, sizeof(ns_fn_stack), \ CLONE_VM | CLONE_VFORK | CLONE_FILES | SIGCHLD,\ (void *)(arg)); \ } while (0) -#define RCVBUF_BIG (2UL * 1024 * 1024) -#define SNDBUF_BIG (4UL * 1024 * 1024) -#define SNDBUF_SMALL (128UL * 1024) +#define RCVBUF_BIG (2ULL * 1024 * 1024) +#define SNDBUF_BIG (4ULL * 1024 * 1024) +#define SNDBUF_SMALL (128ULL * 1024) #include <net/if.h> #include <limits.h> #include <stdint.h> +#include "epoll_type.h" #include "packet.h" struct ctx; -/* cppcheck-suppress funcArgNamesDifferent */ -__attribute__ ((weak)) int ffsl(long int i) { return __builtin_ffsl(i); } -int sock_l4(const struct ctx *c, sa_family_t af, uint8_t proto, - const void *bind_addr, const char *ifname, uint16_t port, - uint32_t data); +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); void sock_probe_mem(struct ctx *c); -int timespec_diff_ms(const struct timespec *a, const struct timespec *b); -void bitmap_set(uint8_t *map, int bit); -void bitmap_clear(uint8_t *map, int bit); -int bitmap_isset(const uint8_t *map, int bit); +long timespec_diff_ms(const struct timespec *a, const struct timespec *b); +int64_t timespec_diff_us(const struct timespec *a, const struct timespec *b); +void bitmap_set(uint8_t *map, unsigned bit); +void bitmap_clear(uint8_t *map, unsigned bit); +bool bitmap_isset(const uint8_t *map, unsigned bit); void bitmap_or(uint8_t *dst, size_t size, const uint8_t *a, const uint8_t *b); char *line_read(char *buf, size_t len, int fd); void ns_enter(const struct ctx *c); bool ns_is_init(void); int open_in_ns(const struct ctx *c, const char *path, int flags); -void write_pidfile(int fd, pid_t pid); +int output_file_open(const char *path, int flags); +void pidfile_write(int fd, pid_t pid); int __daemon(int pidfile_fd, int devnull_fd); int fls(unsigned long x); int write_file(const char *path, const char *buf); -int write_remainder(int fd, const struct iovec *iov, int iovcnt, size_t skip); +int write_all_buf(int fd, const void *buf, size_t len); +int write_remainder(int fd, const struct iovec *iov, size_t iovcnt, size_t skip); +void close_open_files(int argc, char **argv); +bool snprintf_check(char *str, size_t size, const char *format, ...); + +/** + * af_name() - Return name of an address family + * @af: Address/protocol family (AF_INET or AF_INET6) + * + * Returns: Name of the protocol family as a string + */ +static inline const char *af_name(sa_family_t af) +{ + switch (af) { + case AF_INET: + return "IPv4"; + case AF_INET6: + return "IPv6"; + default: + return "<unknown address family>"; + } +} + +#define UINT16_STRLEN (sizeof("65535")) + +/* inet address (- '\0') + port (u16) (- '\0') + ':' + '\0' */ +#define SOCKADDR_INET_STRLEN \ + (INET_ADDRSTRLEN-1 + UINT16_STRLEN-1 + sizeof(":")) + +/* inet6 address (- '\0') + port (u16) (- '\0') + '[' + ']' + ':' + '\0' */ +#define SOCKADDR_INET6_STRLEN \ + (INET6_ADDRSTRLEN-1 + UINT16_STRLEN-1 + sizeof("[]:")) + +#define SOCKADDR_STRLEN MAX(SOCKADDR_INET_STRLEN, SOCKADDR_INET6_STRLEN) + +#define ETH_ADDRSTRLEN (sizeof("00:11:22:33:44:55")) + +struct sock_extended_err; + +const char *sockaddr_ntop(const void *sa, char *dst, socklen_t size); +const char *eth_ntop(const unsigned char *mac, char *dst, size_t size); +const char *str_ee_origin(const struct sock_extended_err *ee); /** * mod_sub() - Modular arithmetic subtraction @@ -194,6 +269,11 @@ static inline bool mod_between(unsigned x, unsigned i, unsigned j, unsigned m) return mod_sub(x, i, m) < mod_sub(j, i, m); } +/* FPRINTF() intentionally silences cert-err33-c clang-tidy warnings */ +#define FPRINTF(f, ...) (void)fprintf(f, __VA_ARGS__) + +void raw_random(void *buf, size_t buflen); + /* * Workarounds for https://github.com/llvm/llvm-project/issues/58992 * |