Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1 | #ifndef _TLV_H |
| 2 | #define _TLV_H |
| 3 | |
| 4 | #include <sys/types.h> |
| 5 | #include <string.h> |
| 6 | |
Harald Welte | 91b5b0d | 2009-02-06 12:51:39 +0000 | [diff] [blame] | 7 | #include <openbsc/msgb.h> |
| 8 | |
Harald Welte | a4d49e9 | 2009-05-23 06:39:58 +0000 | [diff] [blame] | 9 | #define LV_GROSS_LEN(x) (x+1) |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 10 | #define TLV_GROSS_LEN(x) (x+2) |
| 11 | #define TLV16_GROSS_LEN(x) ((2*x)+2) |
Harald Welte | 702d870 | 2008-12-26 20:25:35 +0000 | [diff] [blame] | 12 | #define TL16V_GROSS_LEN(x) (x+3) |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 13 | |
Harald Welte | 91b5b0d | 2009-02-06 12:51:39 +0000 | [diff] [blame] | 14 | /* TLV generation */ |
| 15 | |
Harald Welte | a4d49e9 | 2009-05-23 06:39:58 +0000 | [diff] [blame] | 16 | static inline u_int8_t *lv_put(u_int8_t *buf, u_int8_t len, |
| 17 | const u_int8_t *val) |
| 18 | { |
| 19 | *buf++ = len; |
| 20 | memcpy(buf, val, len); |
| 21 | return buf + len; |
| 22 | } |
| 23 | |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 24 | static inline u_int8_t *tlv_put(u_int8_t *buf, u_int8_t tag, u_int8_t len, |
| 25 | const u_int8_t *val) |
| 26 | { |
| 27 | *buf++ = tag; |
| 28 | *buf++ = len; |
| 29 | memcpy(buf, val, len); |
| 30 | return buf + len; |
| 31 | } |
| 32 | |
| 33 | static inline u_int8_t *tlv16_put(u_int8_t *buf, u_int8_t tag, u_int8_t len, |
| 34 | const u_int16_t *val) |
| 35 | { |
| 36 | *buf++ = tag; |
| 37 | *buf++ = len; |
| 38 | memcpy(buf, val, len*2); |
| 39 | return buf + len*2; |
| 40 | } |
| 41 | |
Harald Welte | 702d870 | 2008-12-26 20:25:35 +0000 | [diff] [blame] | 42 | static inline u_int8_t *tl16v_put(u_int8_t *buf, u_int8_t tag, u_int16_t len, |
| 43 | const u_int8_t *val) |
| 44 | { |
| 45 | *buf++ = tag; |
| 46 | *buf++ = len >> 8; |
| 47 | *buf++ = len & 0xff; |
| 48 | memcpy(buf, val, len); |
| 49 | return buf + len*2; |
| 50 | } |
| 51 | |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 52 | static inline u_int8_t *msgb_tlv16_put(struct msgb *msg, u_int8_t tag, u_int8_t len, const u_int16_t *val) |
| 53 | { |
| 54 | u_int8_t *buf = msgb_put(msg, TLV16_GROSS_LEN(len)); |
| 55 | return tlv16_put(buf, tag, len, val); |
| 56 | } |
| 57 | |
Harald Welte | 702d870 | 2008-12-26 20:25:35 +0000 | [diff] [blame] | 58 | static inline u_int8_t *msgb_tl16v_put(struct msgb *msg, u_int8_t tag, u_int16_t len, |
| 59 | const u_int8_t *val) |
| 60 | { |
| 61 | u_int8_t *buf = msgb_put(msg, TL16V_GROSS_LEN(len)); |
| 62 | return tl16v_put(buf, tag, len, val); |
| 63 | } |
| 64 | |
Harald Welte | a4d49e9 | 2009-05-23 06:39:58 +0000 | [diff] [blame] | 65 | static inline u_int8_t *v_put(u_int8_t *buf, u_int8_t val) |
| 66 | { |
| 67 | *buf++ = val; |
| 68 | return buf; |
| 69 | } |
| 70 | |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 71 | static inline u_int8_t *tv_put(u_int8_t *buf, u_int8_t tag, |
| 72 | u_int8_t val) |
| 73 | { |
| 74 | *buf++ = tag; |
| 75 | *buf++ = val; |
| 76 | return buf; |
| 77 | } |
| 78 | |
Harald Welte | 4b63454 | 2008-12-27 01:55:51 +0000 | [diff] [blame] | 79 | static inline u_int8_t *tv16_put(u_int8_t *buf, u_int8_t tag, |
| 80 | u_int16_t val) |
| 81 | { |
| 82 | *buf++ = tag; |
| 83 | *buf++ = val >> 8; |
| 84 | *buf++ = val & 0xff; |
| 85 | return buf; |
| 86 | } |
| 87 | |
Harald Welte | a4d49e9 | 2009-05-23 06:39:58 +0000 | [diff] [blame] | 88 | static inline u_int8_t *msgb_lv_put(struct msgb *msg, u_int8_t len, const u_int8_t *val) |
| 89 | { |
| 90 | u_int8_t *buf = msgb_put(msg, LV_GROSS_LEN(len)); |
| 91 | return lv_put(buf, len, val); |
| 92 | } |
| 93 | |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 94 | static inline u_int8_t *msgb_tlv_put(struct msgb *msg, u_int8_t tag, u_int8_t len, const u_int8_t *val) |
| 95 | { |
| 96 | u_int8_t *buf = msgb_put(msg, TLV_GROSS_LEN(len)); |
| 97 | return tlv_put(buf, tag, len, val); |
| 98 | } |
| 99 | |
| 100 | static inline u_int8_t *msgb_tv_put(struct msgb *msg, u_int8_t tag, u_int8_t val) |
| 101 | { |
| 102 | u_int8_t *buf = msgb_put(msg, 2); |
| 103 | return tv_put(buf, tag, val); |
| 104 | } |
| 105 | |
Harald Welte | a4d49e9 | 2009-05-23 06:39:58 +0000 | [diff] [blame] | 106 | static inline u_int8_t *msgb_v_put(struct msgb *msg, u_int8_t val) |
| 107 | { |
| 108 | u_int8_t *buf = msgb_put(msg, 1); |
| 109 | return v_put(buf, val); |
| 110 | } |
| 111 | |
Harald Welte | 4b63454 | 2008-12-27 01:55:51 +0000 | [diff] [blame] | 112 | static inline u_int8_t *msgb_tv16_put(struct msgb *msg, u_int8_t tag, u_int16_t val) |
| 113 | { |
| 114 | u_int8_t *buf = msgb_put(msg, 3); |
| 115 | return tv16_put(buf, tag, val); |
| 116 | } |
| 117 | |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 118 | static inline u_int8_t *msgb_tlv_push(struct msgb *msg, u_int8_t tag, u_int8_t len, const u_int8_t *val) |
| 119 | { |
| 120 | u_int8_t *buf = msgb_push(msg, TLV_GROSS_LEN(len)); |
| 121 | return tlv_put(buf, tag, len, val); |
| 122 | } |
| 123 | |
| 124 | static inline u_int8_t *msgb_tv_push(struct msgb *msg, u_int8_t tag, u_int8_t val) |
| 125 | { |
| 126 | u_int8_t *buf = msgb_push(msg, 2); |
| 127 | return tv_put(buf, tag, val); |
| 128 | } |
| 129 | |
Harald Welte | 4b63454 | 2008-12-27 01:55:51 +0000 | [diff] [blame] | 130 | static inline u_int8_t *msgb_tv16_push(struct msgb *msg, u_int8_t tag, u_int16_t val) |
| 131 | { |
| 132 | u_int8_t *buf = msgb_push(msg, 3); |
| 133 | return tv16_put(buf, tag, val); |
| 134 | } |
| 135 | |
Harald Welte | 91b5b0d | 2009-02-06 12:51:39 +0000 | [diff] [blame] | 136 | /* TLV parsing */ |
| 137 | |
| 138 | struct tlv_p_entry { |
Harald Welte | e0590df | 2009-02-15 03:34:15 +0000 | [diff] [blame] | 139 | u_int16_t len; |
Harald Welte | 7bc4cbc | 2009-02-21 12:59:22 +0000 | [diff] [blame] | 140 | const u_int8_t *val; |
Harald Welte | 91b5b0d | 2009-02-06 12:51:39 +0000 | [diff] [blame] | 141 | }; |
| 142 | |
Harald Welte | e0590df | 2009-02-15 03:34:15 +0000 | [diff] [blame] | 143 | enum tlv_type { |
| 144 | TLV_TYPE_FIXED, |
| 145 | TLV_TYPE_T, |
| 146 | TLV_TYPE_TV, |
| 147 | TLV_TYPE_TLV, |
| 148 | TLV_TYPE_TL16V, |
| 149 | }; |
| 150 | |
| 151 | struct tlv_def { |
| 152 | enum tlv_type type; |
| 153 | u_int8_t fixed_len; |
| 154 | }; |
| 155 | |
| 156 | struct tlv_definition { |
| 157 | struct tlv_def def[0xff]; |
| 158 | }; |
| 159 | |
Harald Welte | 2fa7934 | 2009-02-14 19:07:10 +0000 | [diff] [blame] | 160 | struct tlv_parsed { |
Harald Welte | 91b5b0d | 2009-02-06 12:51:39 +0000 | [diff] [blame] | 161 | struct tlv_p_entry lv[0xff]; |
| 162 | }; |
| 163 | |
Harald Welte | 7bc4cbc | 2009-02-21 12:59:22 +0000 | [diff] [blame] | 164 | int tlv_parse(struct tlv_parsed *dec, const struct tlv_definition *def, |
Harald Welte | a4d49e9 | 2009-05-23 06:39:58 +0000 | [diff] [blame] | 165 | const u_int8_t *buf, int buf_len, u_int8_t lv_tag, u_int8_t lv_tag2); |
Harald Welte | 2fa7934 | 2009-02-14 19:07:10 +0000 | [diff] [blame] | 166 | |
| 167 | #define TLVP_PRESENT(x, y) ((x)->lv[y].val) |
| 168 | #define TLVP_LEN(x, y) (x)->lv[y].len |
| 169 | #define TLVP_VAL(x, y) (x)->lv[y].val |
Harald Welte | 4b63454 | 2008-12-27 01:55:51 +0000 | [diff] [blame] | 170 | |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 171 | #endif /* _TLV_H */ |