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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-10 20:34:10 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-10 20:34:10 +0000 |
commit | e4ba6dbc3f1e76890b22773807ea37fe8fa2b1bc (patch) | |
tree | 68cb5ef9081156392f1dd62a00c6ccc1451b93df /epan/addr_and_mask.h | |
parent | Initial commit. (diff) | |
download | wireshark-e4ba6dbc3f1e76890b22773807ea37fe8fa2b1bc.tar.xz wireshark-e4ba6dbc3f1e76890b22773807ea37fe8fa2b1bc.zip |
Adding upstream version 4.2.2.upstream/4.2.2
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'epan/addr_and_mask.h')
-rw-r--r-- | epan/addr_and_mask.h | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/epan/addr_and_mask.h b/epan/addr_and_mask.h new file mode 100644 index 00000000..db9ab16d --- /dev/null +++ b/epan/addr_and_mask.h @@ -0,0 +1,71 @@ +/** @file + * + * Declarations of routines to fetch IPv4 and IPv6 addresses from a tvbuff + * and then mask out bits other than those covered by a prefix length + * + * Wireshark - Network traffic analyzer + * By Gerald Combs <gerald@wireshark.org> + * Copyright 1998 Gerald Combs + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#ifndef __ADDR_AND_MASK_H__ +#define __ADDR_AND_MASK_H__ + +#include <wsutil/inet_ipv4.h> +#include <wsutil/inet_ipv6.h> + +#ifdef __cplusplus +extern "C" { +#endif /* __cplusplus */ + +/* + * These routines return PREFIX_LEN_OK on success, PREFIX_LEN_TOO_LONG if + * the prefix length is too long, and PREFIX_LEN_ZERO if the prefix length + * is 0. + */ + +#define PREFIX_LEN_OK 0 +#define PREFIX_LEN_TOO_LONG 1 +#define PREFIX_LEN_ZERO 2 + +/** +* Fetches an IPv4 address from a tvbuff and +* masks out bits other than those covered by a prefix length +* +* @param tvb tvbuff to read an IPv4 address from +* @param offset offset in the tvbuff to read the IPv4 address from +* @param addr memory location where the IPv4 address read should be stored +* @param prefix_len the length of the prefix (in bits) +* @return the length (in bytes) of the address on success, or -1 on failure +*/ +extern int tvb_get_ipv4_addr_with_prefix_len(tvbuff_t *tvb, int offset, + ws_in4_addr *addr, guint32 prefix_len); + +/** +* Fetches an IPv6 address from a tvbuff and +* masks out bits other than those covered by a prefix length +* +* @param tvb tvbuff to read an IPv6 address from +* @param offset offset in the tvbuff to read the IPv6 address from +* @param addr memory location where the IPv6 address read should be stored +* @param prefix_len the length of the prefix (in bits) +* @return the length (in bytes) of the address on success, or -1 on failure +*/ +extern int tvb_get_ipv6_addr_with_prefix_len(tvbuff_t *tvb, int offset, + ws_in6_addr *addr, guint32 prefix_len); + +/** +* Returns the IPv4 subnet mask of the specified length +* +* @param mask_length the number of bits in the subnet mask (max of 32) +* @return the subnet mask of the specified length +*/ +guint32 ip_get_subnet_mask(const guint32 mask_length); + +#ifdef __cplusplus +} +#endif /* __cplusplus */ + +#endif /* __ADDR_AND_MASK_H__ */ |