diff options
Diffstat (limited to 'util.h')
| -rw-r--r-- | util.h | 179 |
1 files changed, 90 insertions, 89 deletions
@@ -11,51 +11,24 @@ #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 <net/ethernet.h> +#include "common.h" #include "log.h" -#define VERSION_BLOB \ - VERSION "\n" \ - "Copyright Red Hat\n" \ - "GNU General Public License, version 2 or later\n" \ - " <https://www.gnu.org/licenses/old-licenses/gpl-2.0.html>\n" \ - "This is free software: you are free to change and redistribute it.\n" \ - "There is NO WARRANTY, to the extent permitted by law.\n\n" - #ifndef SECCOMP_RET_KILL_PROCESS #define SECCOMP_RET_KILL_PROCESS SECCOMP_RET_KILL #endif -#ifndef ETH_MAX_MTU -#define ETH_MAX_MTU USHRT_MAX -#endif -#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)) -#endif -#ifndef MAX -#define MAX(x, y) (((x) > (y)) ? (x) : (y)) -#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 MAX_FROM_BITS(n) (((1U << (n)) - 1)) - -#define BIT(n) (1UL << (n)) -#define BITMAP_BIT(n) (BIT((n) % (sizeof(long) * 8))) -#define BITMAP_WORD(n) (n / (sizeof(long) * 8)) - #define SWAP(a, b) \ do { \ __typeof__(a) __x = (a); (a) = (b); (b) = __x; \ @@ -64,17 +37,31 @@ #define STRINGIFY(x) #x #define STR(x) STRINGIFY(x) -#define ASSERT(expr) \ - do { \ - if (!(expr)) { \ - err("ASSERTION FAILED in %s (%s:%d): %s", \ - __func__, __FILE__, __LINE__, STRINGIFY(expr)); \ - /* This may actually SIGSYS, due to seccomp, \ - * but that will still get the job done \ - */ \ - abort(); \ - } \ - } while (0) +void abort_with_msg(const char *fmt, ...) + __attribute__((format(printf, 1, 2), noreturn)); + +/* 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 + * + * Therefore, avoid using the usual do while wrapper we use to force the macro + * to act like a single statement requiring a ';'. + */ +#ifndef NDEBUG +#define assert_with_msg(expr, ...) \ + ((expr) ? (void)0 : abort_with_msg(__VA_ARGS__)) +/* The standard library assert() hits our seccomp filter and dies before it can + * actually print a message. So, replace it with our own version. + */ +#undef assert +#define assert(expr) \ + assert_with_msg((expr), "ASSERTION FAILED in %s (%s:%d): %s", \ + __func__, __FILE__, __LINE__, STRINGIFY(expr)) +#else +#define assert_with_msg(expr, ...) \ + ((void)(expr), 0 ? (void)0 : abort_with_msg(__VA_ARGS__)) +#endif #ifdef P_tmpdir #define TMPDIR P_tmpdir @@ -86,43 +73,27 @@ #define V6 1 #define IP_VERSIONS 2 -#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_BROADCAST \ + ((uint8_t [ETH_ALEN]){ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }) #define MAC_ZERO ((uint8_t [ETH_ALEN]){ 0 }) -#define MAC_LAA ((uint8_t [ETH_ALEN]){ BIT(1), 0, 0, 0, 0, 0 }) #define MAC_IS_ZERO(addr) (!memcmp((addr), MAC_ZERO, ETH_ALEN)) +#define MAC_UNDEF MAC_BROADCAST +#define MAC_IS_UNDEF(addr) (!memcmp((addr), MAC_UNDEF, ETH_ALEN)) -#ifndef __bswap_constant_16 -#define __bswap_constant_16(x) \ - ((uint16_t) ((((x) >> 8) & 0xff) | (((x) & 0xff) << 8))) -#endif - -#ifndef __bswap_constant_32 -#define __bswap_constant_32(x) \ - ((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >> 8) | \ - (((x) & 0x0000ff00) << 8) | (((x) & 0x000000ff) << 24)) -#endif - -#if __BYTE_ORDER == __BIG_ENDIAN -#define htons_constant(x) (x) -#define htonl_constant(x) (x) -#else -#define htons_constant(x) (__bswap_constant_16(x)) -#define htonl_constant(x) (__bswap_constant_32(x)) -#endif +extern uint8_t eth_pad[ETH_ZLEN]; /** * 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 + * Return: host-order value of 32-bit BE quantity at @p */ static inline uint32_t ntohl_unaligned(const void *p) { @@ -132,7 +103,19 @@ static inline uint32_t ntohl_unaligned(const void *p) return ntohl(val); } -#define NS_FN_STACK_SIZE (RLIMIT_STACK_VAL * 1024 / 8) +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) + +#define smp_wmb() smp_mb_release() +#define smp_rmb() smp_mb_acquire() + +#define qatomic_or(ptr, n) \ + ((void) __atomic_fetch_or(ptr, n, __ATOMIC_SEQ_CST)) + +#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) \ @@ -145,9 +128,12 @@ int do_clone(int (*fn)(void *), char *stack_area, size_t stack_size, int flags, (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) + +#define FD_REF_BITS 24 +#define FD_REF_MAX ((int)MAX_FROM_BITS(FD_REF_BITS)) #include <net/if.h> #include <limits.h> @@ -157,39 +143,38 @@ int do_clone(int (*fn)(void *), char *stack_area, size_t stack_size, int flags, #include "packet.h" struct ctx; - -/* cppcheck-suppress funcArgNamesDifferent */ -__attribute__ ((weak)) int ffsl(long int i) { return __builtin_ffsl(i); } -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); -int sock_l4(const struct ctx *c, sa_family_t af, enum epoll_type type, - const void *bind_addr, const char *ifname, uint16_t port, - uint32_t data); -void sock_probe_mem(struct ctx *c); +union sockaddr_inany; + +int sock_l4(const struct ctx *c, enum epoll_type type, + const union sockaddr_inany *sa, const char *ifname); +int sock_l4_dualstack_any(const struct ctx *c, enum epoll_type type, + in_port_t port, const char *ifname); +int sock_unix(char *sock_path); +void sock_probe_features(struct ctx *c); 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); -int pidfile_open(const char *path); +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 ilog2(unsigned long x); int write_file(const char *path, const char *buf); +intmax_t read_file_integer(const char *path, intmax_t fallback); int write_remainder(int fd, const struct iovec *iov, size_t iovcnt, size_t skip); +int read_remainder(int fd, const struct iovec *iov, size_t cnt, size_t skip); void close_open_files(int argc, char **argv); +bool snprintf_check(char *str, size_t size, const char *format, ...); +long clamped_scale(long x, long y, long lo, long hi, long f); /** * 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 + * Return: name of the protocol family as a string */ static inline const char *af_name(sa_family_t af) { @@ -203,8 +188,6 @@ static inline const char *af_name(sa_family_t af) } } -#define UINT16_STRLEN (sizeof("65535")) - /* inet address (- '\0') + port (u16) (- '\0') + ':' + '\0' */ #define SOCKADDR_INET_STRLEN \ (INET_ADDRSTRLEN-1 + UINT16_STRLEN-1 + sizeof(":")) @@ -215,9 +198,12 @@ static inline const char *af_name(sa_family_t af) #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); /** @@ -248,6 +234,8 @@ static inline bool mod_between(unsigned x, unsigned i, unsigned j, unsigned m) return mod_sub(x, i, m) < mod_sub(j, i, m); } +void raw_random(void *buf, size_t buflen); + /* * Workarounds for https://github.com/llvm/llvm-project/issues/58992 * @@ -288,4 +276,17 @@ static inline int wrap_accept4(int sockfd, struct sockaddr *addr, #define accept4(s, addr, addrlen, flags) \ wrap_accept4((s), (addr), (addrlen), (flags)) +static inline int wrap_getsockname(int sockfd, struct sockaddr *addr, +/* cppcheck-suppress constParameterPointer */ + socklen_t *addrlen) +{ + sa_init(addr, addrlen); + return getsockname(sockfd, addr, addrlen); +} +#define getsockname(s, addr, addrlen) \ + wrap_getsockname((s), (addr), (addrlen)) + +#define PASST_MAXDNAME 254 /* 253 (RFC 1035) + 1 (the terminator) */ +void encode_domain_name(char *buf, const char *domain_name); + #endif /* UTIL_H */ |