1 /* 2 * lib/netfilter/queue_obj.c Netfilter Queue 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Lesser General Public 6 * License as published by the Free Software Foundation version 2.1 7 * of the License. 8 * 9 * Copyright (c) 2007, 2008 Patrick McHardy <kaber (at) trash.net> 10 */ 11 12 /** 13 * @ingroup nfnl 14 * @defgroup queue Queue 15 * @brief 16 * @{ 17 */ 18 19 #include <netlink-private/netlink.h> 20 #include <netlink/netfilter/nfnl.h> 21 #include <netlink/netfilter/queue.h> 22 23 /** @cond SKIP */ 24 #define QUEUE_ATTR_GROUP (1UL << 0) 25 #define QUEUE_ATTR_MAXLEN (1UL << 1) 26 #define QUEUE_ATTR_COPY_MODE (1UL << 2) 27 #define QUEUE_ATTR_COPY_RANGE (1UL << 3) 28 /** @endcond */ 29 30 31 static void nfnl_queue_dump(struct nl_object *a, struct nl_dump_params *p) 32 { 33 struct nfnl_queue *queue = (struct nfnl_queue *) a; 34 char buf[64]; 35 36 nl_new_line(p); 37 38 if (queue->ce_mask & QUEUE_ATTR_GROUP) 39 nl_dump(p, "group=%u ", queue->queue_group); 40 41 if (queue->ce_mask & QUEUE_ATTR_MAXLEN) 42 nl_dump(p, "maxlen=%u ", queue->queue_maxlen); 43 44 if (queue->ce_mask & QUEUE_ATTR_COPY_MODE) 45 nl_dump(p, "copy_mode=%s ", 46 nfnl_queue_copy_mode2str(queue->queue_copy_mode, 47 buf, sizeof(buf))); 48 49 if (queue->ce_mask & QUEUE_ATTR_COPY_RANGE) 50 nl_dump(p, "copy_range=%u ", queue->queue_copy_range); 51 52 nl_dump(p, "\n"); 53 } 54 55 static const struct trans_tbl copy_modes[] = { 56 __ADD(NFNL_QUEUE_COPY_NONE, none) 57 __ADD(NFNL_QUEUE_COPY_META, meta) 58 __ADD(NFNL_QUEUE_COPY_PACKET, packet) 59 }; 60 61 char *nfnl_queue_copy_mode2str(enum nfnl_queue_copy_mode copy_mode, char *buf, 62 size_t len) 63 { 64 return __type2str(copy_mode, buf, len, copy_modes, 65 ARRAY_SIZE(copy_modes)); 66 } 67 68 enum nfnl_queue_copy_mode nfnl_queue_str2copy_mode(const char *name) 69 { 70 return __str2type(name, copy_modes, ARRAY_SIZE(copy_modes)); 71 } 72 73 /** 74 * @name Allocation/Freeing 75 * @{ 76 */ 77 78 struct nfnl_queue *nfnl_queue_alloc(void) 79 { 80 return (struct nfnl_queue *) nl_object_alloc(&queue_obj_ops); 81 } 82 83 void nfnl_queue_get(struct nfnl_queue *queue) 84 { 85 nl_object_get((struct nl_object *) queue); 86 } 87 88 void nfnl_queue_put(struct nfnl_queue *queue) 89 { 90 nl_object_put((struct nl_object *) queue); 91 } 92 93 /** @} */ 94 95 /** 96 * @name Attributes 97 * @{ 98 */ 99 100 void nfnl_queue_set_group(struct nfnl_queue *queue, uint16_t group) 101 { 102 queue->queue_group = group; 103 queue->ce_mask |= QUEUE_ATTR_GROUP; 104 } 105 106 int nfnl_queue_test_group(const struct nfnl_queue *queue) 107 { 108 return !!(queue->ce_mask & QUEUE_ATTR_GROUP); 109 } 110 111 uint16_t nfnl_queue_get_group(const struct nfnl_queue *queue) 112 { 113 return queue->queue_group; 114 } 115 116 void nfnl_queue_set_maxlen(struct nfnl_queue *queue, uint32_t maxlen) 117 { 118 queue->queue_maxlen = maxlen; 119 queue->ce_mask |= QUEUE_ATTR_MAXLEN; 120 } 121 122 int nfnl_queue_test_maxlen(const struct nfnl_queue *queue) 123 { 124 return !!(queue->ce_mask & QUEUE_ATTR_MAXLEN); 125 } 126 127 uint32_t nfnl_queue_get_maxlen(const struct nfnl_queue *queue) 128 { 129 return queue->queue_maxlen; 130 } 131 132 void nfnl_queue_set_copy_mode(struct nfnl_queue *queue, enum nfnl_queue_copy_mode mode) 133 { 134 queue->queue_copy_mode = mode; 135 queue->ce_mask |= QUEUE_ATTR_COPY_MODE; 136 } 137 138 int nfnl_queue_test_copy_mode(const struct nfnl_queue *queue) 139 { 140 return !!(queue->ce_mask & QUEUE_ATTR_COPY_MODE); 141 } 142 143 enum nfnl_queue_copy_mode nfnl_queue_get_copy_mode(const struct nfnl_queue *queue) 144 { 145 return queue->queue_copy_mode; 146 } 147 148 void nfnl_queue_set_copy_range(struct nfnl_queue *queue, uint32_t copy_range) 149 { 150 queue->queue_copy_range = copy_range; 151 queue->ce_mask |= QUEUE_ATTR_COPY_RANGE; 152 } 153 154 int nfnl_queue_test_copy_range(const struct nfnl_queue *queue) 155 { 156 return !!(queue->ce_mask & QUEUE_ATTR_COPY_RANGE); 157 } 158 159 uint32_t nfnl_queue_get_copy_range(const struct nfnl_queue *queue) 160 { 161 return queue->queue_copy_range; 162 } 163 164 static int nfnl_queue_compare(struct nl_object *_a, struct nl_object *_b, 165 uint32_t attrs, int flags) 166 { 167 struct nfnl_queue *a = (struct nfnl_queue *) _a; 168 struct nfnl_queue *b = (struct nfnl_queue *) _b; 169 int diff = 0; 170 171 #define NFNL_QUEUE_DIFF(ATTR, EXPR) \ 172 ATTR_DIFF(attrs, QUEUE_ATTR_##ATTR, a, b, EXPR) 173 #define NFNL_QUEUE_DIFF_VAL(ATTR, FIELD) \ 174 NFNL_QUEUE_DIFF(ATTR, a->FIELD != b->FIELD) 175 176 diff |= NFNL_QUEUE_DIFF_VAL(GROUP, queue_group); 177 diff |= NFNL_QUEUE_DIFF_VAL(MAXLEN, queue_maxlen); 178 diff |= NFNL_QUEUE_DIFF_VAL(COPY_MODE, queue_copy_mode); 179 diff |= NFNL_QUEUE_DIFF_VAL(COPY_RANGE, queue_copy_range); 180 181 #undef NFNL_QUEUE_DIFF 182 #undef NFNL_QUEUE_DIFF_VAL 183 184 return diff; 185 } 186 187 static const struct trans_tbl nfnl_queue_attrs[] = { 188 __ADD(QUEUE_ATTR_GROUP, group) 189 __ADD(QUEUE_ATTR_MAXLEN, maxlen) 190 __ADD(QUEUE_ATTR_COPY_MODE, copy_mode) 191 __ADD(QUEUE_ATTR_COPY_RANGE, copy_range) 192 }; 193 194 static char *nfnl_queue_attrs2str(int attrs, char *buf, size_t len) 195 { 196 return __flags2str(attrs, buf, len, nfnl_queue_attrs, 197 ARRAY_SIZE(nfnl_queue_attrs)); 198 } 199 200 /** @} */ 201 202 struct nl_object_ops queue_obj_ops = { 203 .oo_name = "netfilter/queue", 204 .oo_size = sizeof(struct nfnl_queue), 205 .oo_dump = { 206 [NL_DUMP_LINE] = nfnl_queue_dump, 207 [NL_DUMP_DETAILS] = nfnl_queue_dump, 208 [NL_DUMP_STATS] = nfnl_queue_dump, 209 }, 210 .oo_compare = nfnl_queue_compare, 211 .oo_attrs2str = nfnl_queue_attrs2str, 212 .oo_id_attrs = QUEUE_ATTR_GROUP, 213 }; 214 215 /** @} */ 216
