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| | /* SPDX-License-Identifier: AGPL-3.0-or-later
* Copyright (c) 2021 Red Hat GmbH
* Author: Stefano Brivio <sbrivio@redhat.com>
*/
void err(const char *format, ...);
void warn(const char *format, ...);
void info(const char *format, ...);
void debug(const char *format, ...);
#define CHECK_SET_MIN_MAX(basename, fd) \
do { \
if ((fd) < basename##min) \
basename##min = (fd); \
if ((fd) > basename##max) \
basename##max = (fd); \
} while (0)
#define CHECK_SET_MIN_MAX_PROTO_FD(proto, ipproto, proto_ctx, fd) \
do { \
if ((proto) == (ipproto)) \
CHECK_SET_MIN_MAX(c->proto_ctx.fd_, (fd)); \
} while (0)
#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 ROUND_DOWN(x, y) ((x) & ~((y) - 1))
#define ROUND_UP(x, y) (((x) + (y) - 1) & ~((y) - 1))
#define SWAP(a, b) \
do { \
__typeof__(a) __x = (a); (a) = (b); (b) = __x; \
} while (0) \
#define STRINGIFY(x) #x
#define STR(x) STRINGIFY(x)
#define V4 0
#define V6 1
#define IP_VERSIONS 2
enum {
IP_VERSION_DISABLED = 0,
IP_VERSION_ENABLED,
IP_VERSION_PROBE,
};
#define ARRAY_SIZE(a) ((int)(sizeof(a) / sizeof((a)[0])))
#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))
#define NS_FN_STACK_SIZE (RLIMIT_STACK_VAL * 1024 / 4)
#define NS_CALL(fn, arg) \
do { \
char ns_fn_stack[NS_FN_STACK_SIZE]; \
\
clone((fn), ns_fn_stack + sizeof(ns_fn_stack) / 2, \
CLONE_VM | CLONE_VFORK | CLONE_FILES | SIGCHLD, \
(void *)(arg)); \
} while (0)
#if __BYTE_ORDER == __BIG_ENDIAN
#define L2_BUF_ETH_IP4_INIT \
{ \
.h_dest = { 0 }, \
.h_source = { 0 }, \
.h_proto = ETH_P_IP, \
}
#else
#define L2_BUF_ETH_IP4_INIT \
{ \
.h_dest = { 0 }, \
.h_source = { 0 }, \
.h_proto = __bswap_constant_16(ETH_P_IP), \
}
#endif
#if __BYTE_ORDER == __BIG_ENDIAN
#define L2_BUF_ETH_IP6_INIT \
{ \
.h_dest = { 0 }, \
.h_source = { 0 }, \
.h_proto = ETH_P_IPV6, \
}
#else
#define L2_BUF_ETH_IP6_INIT \
{ \
.h_dest = { 0 }, \
.h_source = { 0 }, \
.h_proto = __bswap_constant_16(ETH_P_IPV6), \
}
#endif
#define L2_BUF_IP4_INIT(proto) \
{ \
.version = 4, \
.ihl = 5, \
.tos = 0, \
.tot_len = 0, \
.id = 0, \
.frag_off = 0, \
.ttl = 255, \
.protocol = (proto), \
.saddr = 0, \
.daddr = 0, \
}
#define L2_BUF_IP6_INIT(proto) \
{ \
.priority = 0, \
.version = 6, \
.flow_lbl = { 0 }, \
.payload_len = 0, \
.nexthdr = (proto), \
.hop_limit = 255, \
.saddr = IN6ADDR_ANY_INIT, \
.daddr = IN6ADDR_ANY_INIT, \
}
#define RCVBUF_BIG (2 * 1024 * 1024)
#define SNDBUF_BIG (4 * 1024 * 1024)
#define SNDBUF_SMALL (128 * 1024)
#include <net/if.h>
#include <limits.h>
#include <stdarg.h>
enum bind_type {
BIND_ANY = 0,
BIND_LOOPBACK,
BIND_LL,
BIND_EXT,
};
struct ctx;
struct ipv6hdr {
#pragma GCC diagnostic ignored "-Wpedantic"
#if __BYTE_ORDER == __BIG_ENDIAN
__u8 version:4,
priority:4;
#else
uint8_t priority:4,
version:4;
#endif
#pragma GCC diagnostic pop
uint8_t flow_lbl[3];
__be16 payload_len;
__u8 nexthdr;
__u8 hop_limit;
struct in6_addr saddr;
struct in6_addr daddr;
};
struct ipv6_opt_hdr {
__u8 nexthdr;
__u8 hdrlen;
/*
* TLV encoded option data follows.
*/
} __attribute__((packed)); /* required for some archs */
__attribute__ ((weak)) int ffsl(long int i) { return __builtin_ffsl(i); }
void __openlog(const char *ident, int option, int facility);
void passt_vsyslog(int pri, const char *format, va_list ap);
void __setlogmask(int mask);
char *ipv6_l4hdr(struct ipv6hdr *ip6h, uint8_t *proto);
int sock_l4(struct ctx *c, int af, uint8_t proto, uint16_t port,
enum bind_type bind_addr, uint32_t data);
void sock_probe_mem(struct ctx *c);
int timespec_diff_ms(struct timespec *a, 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);
char *line_read(char *buf, size_t len, int fd);
void procfs_scan_listen(char *name, uint8_t *map, uint8_t *exclude);
int ns_enter(struct ctx *c);
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