mirror of
https://git.netfilter.org/libnftnl
synced 2026-01-28 03:14:09 +00:00
5a54b99859
Wrap the common parsing of string attributes in a function. Apart from slightly reducing code size, this unifies callers in conditional freeing of the field in case it was set before (missing in twelve spots) and error checking for failing strdup()-calls (missing in four spots). Signed-off-by: Phil Sutter <phil@nwl.cc> Acked-by: Florian Westphal <fw@strlen.de>
95 lines
2.6 KiB
C
95 lines
2.6 KiB
C
#ifndef LIBNFTNL_UTILS_H
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#define LIBNFTNL_UTILS_H 1
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#include <errno.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <string.h>
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#include <stdlib.h>
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#include <libnftnl/common.h>
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#include "config.h"
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#ifdef HAVE_VISIBILITY_HIDDEN
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# define __visible __attribute__((visibility("default")))
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# define EXPORT_SYMBOL(x) typeof(x) (x) __visible;
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#else
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# define __visible
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# define EXPORT_SYMBOL
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#endif
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#define __noreturn __attribute__((__noreturn__))
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#define xfree(ptr) free((void *)ptr);
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#define div_round_up(n, d) (((n) + (d) - 1) / (d))
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void __noreturn __abi_breakage(const char *file, int line, const char *reason);
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#define abi_breakage() \
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__abi_breakage(__FILE__, __LINE__, strerror(errno));
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void __nftnl_assert_fail(uint16_t attr, const char *filename, int line);
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#define nftnl_assert(val, attr, expr) \
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((!val || expr) \
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? (void)0 \
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: __nftnl_assert_fail(attr, __FILE__, __LINE__))
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#define nftnl_assert_validate(data, _validate_array, _attr, _data_len) \
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({ \
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if (!data) \
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__nftnl_assert_fail(_attr, __FILE__, __LINE__); \
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if (_validate_array[_attr]) \
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nftnl_assert(data, _attr, _validate_array[_attr] == _data_len); \
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})
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void __nftnl_assert_attr_exists(uint16_t attr, uint16_t attr_max,
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const char *filename, int line);
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#define nftnl_assert_attr_exists(_attr, _attr_max) \
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({ \
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if (_attr > _attr_max) \
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__nftnl_assert_attr_exists(_attr, _attr_max, __FILE__, __LINE__); \
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})
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#define SNPRINTF_BUFFER_SIZE(ret, remain, offset) \
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if (ret < 0) \
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ret = 0; \
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offset += ret; \
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if (ret > remain) \
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ret = remain; \
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remain -= ret; \
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#define BUILD_BUG_ON_ZERO(e) (sizeof(char[1 - 2 * !!(e)]) - 1)
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#define __must_be_array(a) \
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BUILD_BUG_ON_ZERO(__builtin_types_compatible_p(typeof(a), typeof(&a[0])))
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#define array_size(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
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const char *nftnl_family2str(uint32_t family);
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const char *nftnl_verdict2str(uint32_t verdict);
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enum nftnl_cmd_type nftnl_flag2cmd(uint32_t flags);
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int nftnl_fprintf(FILE *fpconst, const void *obj, uint32_t cmd, uint32_t type,
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uint32_t flags,
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int (*snprintf_cb)(char *buf, size_t bufsiz, const void *obj,
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uint32_t cmd, uint32_t type,
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uint32_t flags));
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int nftnl_set_str_attr(const char **dptr, uint32_t *flags,
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uint16_t attr, const void *data, uint32_t data_len);
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struct nlattr;
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void nftnl_attr_put_ifname(struct nlmsghdr *nlh, const char *ifname);
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char *nftnl_attr_get_ifname(const struct nlattr *attr);
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int nftnl_parse_str_attr(const struct nlattr *tb, int attr,
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const char **field, uint32_t *flags);
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#endif
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