projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| afe00251 AB |
1 | #ifndef _DCCP_FEAT_H |
| 2 | #define _DCCP_FEAT_H | |
| 3 | /* | |
| 4 | * net/dccp/feat.h | |
| 5 | * | |
| 6 | * An implementation of the DCCP protocol | |
| 7 | * Copyright (c) 2005 Andrea Bittau <a.bittau@cs.ucl.ac.uk> | |
| 8 | * | |
| 9 | * This program is free software; you can redistribute it and/or modify it | |
| 10 | * under the terms of the GNU General Public License version 2 as | |
| 11 | * published by the Free Software Foundation. | |
| 12 | */ | |
| 13 | ||
| 14 | #include <linux/types.h> | |
| c02fdc0e | 15 | #include "dccp.h" |
| afe00251 | 16 | |
| c02fdc0e GR |
17 | static inline int dccp_feat_is_valid_length(u8 type, u8 feature, u8 len) |
| 18 | { | |
| 19 | /* sec. 6.1: Confirm has at least length 3, | |
| 20 | * sec. 6.2: Change has at least length 4 */ | |
| 21 | if (len < 3) | |
| 22 | return 1; | |
| 23 | if (len < 4 && (type == DCCPO_CHANGE_L || type == DCCPO_CHANGE_R)) | |
| 24 | return 1; | |
| 25 | /* XXX: add per-feature length validation (sec. 6.6.8) */ | |
| 26 | return 0; | |
| 27 | } | |
| 28 | ||
| 29 | static inline int dccp_feat_is_reserved(const u8 feat) | |
| 30 | { | |
| 31 | return (feat > DCCPF_DATA_CHECKSUM && | |
| 32 | feat < DCCPF_MIN_CCID_SPECIFIC) || | |
| c9eaf173 | 33 | feat == DCCPF_RESERVED; |
| c02fdc0e GR |
34 | } |
| 35 | ||
| 36 | /* feature negotiation knows only these four option types (RFC 4340, sec. 6) */ | |
| 37 | static inline int dccp_feat_is_valid_type(const u8 optnum) | |
| 38 | { | |
| 39 | return optnum >= DCCPO_CHANGE_L && optnum <= DCCPO_CONFIRM_R; | |
| 40 | ||
| 41 | } | |
| 42 | ||
| 43 | #ifdef CONFIG_IP_DCCP_DEBUG | |
| 44 | extern const char *dccp_feat_typename(const u8 type); | |
| 45 | extern const char *dccp_feat_name(const u8 feat); | |
| 46 | ||
| 47 | static inline void dccp_feat_debug(const u8 type, const u8 feat, const u8 val) | |
| 48 | { | |
| 49 | dccp_pr_debug("%s(%s (%d), %d)\n", dccp_feat_typename(type), | |
| 50 | dccp_feat_name(feat), feat, val); | |
| 51 | } | |
| 52 | #else | |
| 53 | #define dccp_feat_debug(type, feat, val) | |
| 54 | #endif /* CONFIG_IP_DCCP_DEBUG */ | |
| afe00251 | 55 | |
| 8ca0d17b | 56 | extern int dccp_feat_change(struct dccp_minisock *dmsk, u8 type, u8 feature, |
| afe00251 AB |
57 | u8 *val, u8 len, gfp_t gfp); |
| 58 | extern int dccp_feat_change_recv(struct sock *sk, u8 type, u8 feature, | |
| 59 | u8 *val, u8 len); | |
| 60 | extern int dccp_feat_confirm_recv(struct sock *sk, u8 type, u8 feature, | |
| 61 | u8 *val, u8 len); | |
| 8ca0d17b | 62 | extern void dccp_feat_clean(struct dccp_minisock *dmsk); |
| afe00251 | 63 | extern int dccp_feat_clone(struct sock *oldsk, struct sock *newsk); |
| 8ca0d17b | 64 | extern int dccp_feat_init(struct dccp_minisock *dmsk); |
| afe00251 AB |
65 | |
| 66 | #endif /* _DCCP_FEAT_H */ |