OpenWrt – Blame information for rev 1
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1 | office | 1 | /* |
2 | * netlink/attr.h Netlink Attributes |
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3 | * |
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4 | * This library is free software; you can redistribute it and/or |
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5 | * modify it under the terms of the GNU Lesser General Public |
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6 | * License as published by the Free Software Foundation version 2.1 |
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7 | * of the License. |
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8 | * |
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9 | * Copyright (c) 2003-2008 Thomas Graf <tgraf@suug.ch> |
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10 | */ |
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11 | |||
12 | #ifndef NETLINK_ATTR_H_ |
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13 | #define NETLINK_ATTR_H_ |
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14 | |||
15 | #include <netlink/netlink.h> |
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16 | #include <netlink/object.h> |
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17 | #include <netlink/addr.h> |
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18 | #include <netlink/data.h> |
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19 | #include <netlink/msg.h> |
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20 | |||
21 | #ifdef __cplusplus |
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22 | extern "C" { |
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23 | #endif |
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24 | |||
25 | struct nl_msg; |
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26 | |||
27 | /** |
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28 | * @name Basic Attribute Data Types |
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29 | * @{ |
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30 | */ |
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31 | |||
32 | /** |
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33 | * @ingroup attr |
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34 | * Basic attribute data types |
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35 | * |
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36 | * See \ref attr_datatypes for more details. |
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37 | */ |
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38 | enum { |
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39 | NLA_UNSPEC, /**< Unspecified type, binary data chunk */ |
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40 | NLA_U8, /**< 8 bit integer */ |
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41 | NLA_U16, /**< 16 bit integer */ |
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42 | NLA_U32, /**< 32 bit integer */ |
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43 | NLA_U64, /**< 64 bit integer */ |
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44 | NLA_STRING, /**< NUL terminated character string */ |
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45 | NLA_FLAG, /**< Flag */ |
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46 | NLA_MSECS, /**< Micro seconds (64bit) */ |
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47 | NLA_NESTED, /**< Nested attributes */ |
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48 | __NLA_TYPE_MAX, |
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49 | }; |
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50 | |||
51 | #define NLA_TYPE_MAX (__NLA_TYPE_MAX - 1) |
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52 | |||
53 | /** @} */ |
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54 | |||
55 | /** |
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56 | * @ingroup attr |
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57 | * Attribute validation policy. |
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58 | * |
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59 | * See \ref attr_datatypes for more details. |
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60 | */ |
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61 | struct nla_policy { |
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62 | /** Type of attribute or NLA_UNSPEC */ |
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63 | uint16_t type; |
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64 | |||
65 | /** Minimal length of payload required */ |
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66 | uint16_t minlen; |
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67 | |||
68 | /** Maximal length of payload allowed */ |
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69 | uint16_t maxlen; |
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70 | }; |
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71 | |||
72 | /* Attribute parsing */ |
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73 | extern int nla_ok(const struct nlattr *, int); |
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74 | extern struct nlattr * nla_next(const struct nlattr *, int *); |
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75 | extern int nla_parse(struct nlattr **, int, struct nlattr *, |
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76 | int, struct nla_policy *); |
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77 | extern int nla_validate(struct nlattr *, int, int, |
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78 | struct nla_policy *); |
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79 | extern struct nlattr * nla_find(struct nlattr *, int, int); |
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80 | |||
81 | /* Unspecific attribute */ |
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82 | extern struct nlattr * nla_reserve(struct nl_msg *, int, int); |
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83 | extern int nla_put(struct nl_msg *, int, int, const void *); |
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84 | |||
85 | /** |
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86 | * nlmsg_find_attr - find a specific attribute in a netlink message |
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87 | * @arg nlh netlink message header |
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88 | * @arg hdrlen length of familiy specific header |
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89 | * @arg attrtype type of attribute to look for |
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90 | * |
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91 | * Returns the first attribute which matches the specified type. |
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92 | */ |
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93 | static inline struct nlattr *nlmsg_find_attr(struct nlmsghdr *nlh, int hdrlen, int attrtype) |
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94 | { |
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95 | return nla_find(nlmsg_attrdata(nlh, hdrlen), |
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96 | nlmsg_attrlen(nlh, hdrlen), attrtype); |
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97 | } |
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98 | |||
99 | |||
100 | /** |
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101 | * Return size of attribute whithout padding. |
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102 | * @arg payload Payload length of attribute. |
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103 | * |
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104 | * @code |
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105 | * <-------- nla_attr_size(payload) ---------> |
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106 | * +------------------+- - -+- - - - - - - - - +- - -+ |
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107 | * | Attribute Header | Pad | Payload | Pad | |
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108 | * +------------------+- - -+- - - - - - - - - +- - -+ |
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109 | * @endcode |
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110 | * |
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111 | * @return Size of attribute in bytes without padding. |
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112 | */ |
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113 | static inline int nla_attr_size(int payload) |
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114 | { |
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115 | return NLA_HDRLEN + payload; |
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116 | } |
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117 | |||
118 | /** |
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119 | * Return size of attribute including padding. |
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120 | * @arg payload Payload length of attribute. |
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121 | * |
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122 | * @code |
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123 | * <----------- nla_total_size(payload) -----------> |
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124 | * +------------------+- - -+- - - - - - - - - +- - -+ |
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125 | * | Attribute Header | Pad | Payload | Pad | |
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126 | * +------------------+- - -+- - - - - - - - - +- - -+ |
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127 | * @endcode |
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128 | * |
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129 | * @return Size of attribute in bytes. |
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130 | */ |
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131 | static inline int nla_total_size(int payload) |
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132 | { |
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133 | return NLA_ALIGN(nla_attr_size(payload)); |
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134 | } |
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135 | |||
136 | /** |
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137 | * Return length of padding at the tail of the attribute. |
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138 | * @arg payload Payload length of attribute. |
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139 | * |
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140 | * @code |
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141 | * +------------------+- - -+- - - - - - - - - +- - -+ |
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142 | * | Attribute Header | Pad | Payload | Pad | |
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143 | * +------------------+- - -+- - - - - - - - - +- - -+ |
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144 | * <---> |
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145 | * @endcode |
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146 | * |
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147 | * @return Length of padding in bytes. |
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148 | */ |
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149 | static inline int nla_padlen(int payload) |
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150 | { |
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151 | return nla_total_size(payload) - nla_attr_size(payload); |
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152 | } |
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153 | |||
154 | /** |
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155 | * Return type of the attribute. |
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156 | * @arg nla Attribute. |
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157 | * |
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158 | * @return Type of attribute. |
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159 | */ |
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160 | static inline int nla_type(const struct nlattr *nla) |
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161 | { |
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162 | return nla->nla_type & NLA_TYPE_MASK; |
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163 | } |
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164 | |||
165 | /** |
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166 | * Return pointer to the payload section. |
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167 | * @arg nla Attribute. |
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168 | * |
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169 | * @return Pointer to start of payload section. |
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170 | */ |
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171 | static inline void *nla_data(const struct nlattr *nla) |
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172 | { |
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173 | return (char *) nla + NLA_HDRLEN; |
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174 | } |
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175 | |||
176 | /** |
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177 | * Return length of the payload . |
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178 | * @arg nla Attribute |
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179 | * |
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180 | * @return Length of payload in bytes. |
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181 | */ |
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182 | static inline int nla_len(const struct nlattr *nla) |
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183 | { |
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184 | return nla->nla_len - NLA_HDRLEN; |
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185 | } |
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186 | |||
187 | /** |
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188 | * Copy attribute payload to another memory area. |
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189 | * @arg dest Pointer to destination memory area. |
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190 | * @arg src Attribute |
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191 | * @arg count Number of bytes to copy at most. |
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192 | * |
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193 | * Note: The number of bytes copied is limited by the length of |
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194 | * the attribute payload. |
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195 | * |
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196 | * @return The number of bytes copied to dest. |
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197 | */ |
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198 | static inline int nla_memcpy(void *dest, struct nlattr *src, int count) |
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199 | { |
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200 | int minlen; |
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201 | |||
202 | if (!src) |
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203 | return 0; |
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204 | |||
205 | minlen = min_t(int, count, nla_len(src)); |
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206 | memcpy(dest, nla_data(src), minlen); |
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207 | |||
208 | return minlen; |
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209 | } |
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210 | |||
211 | |||
212 | /** |
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213 | * Add abstract data as unspecific attribute to netlink message. |
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214 | * @arg msg Netlink message. |
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215 | * @arg attrtype Attribute type. |
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216 | * @arg data Abstract data object. |
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217 | * |
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218 | * Equivalent to nla_put() except that the length of the payload is |
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219 | * derived from the abstract data object. |
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220 | * |
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221 | * @see nla_put |
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222 | * @return 0 on success or a negative error code. |
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223 | */ |
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224 | static inline int nla_put_data(struct nl_msg *msg, int attrtype, struct nl_data *data) |
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225 | { |
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226 | return nla_put(msg, attrtype, nl_data_get_size(data), |
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227 | nl_data_get(data)); |
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228 | } |
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229 | |||
230 | /** |
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231 | * Add abstract address as unspecific attribute to netlink message. |
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232 | * @arg msg Netlink message. |
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233 | * @arg attrtype Attribute type. |
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234 | * @arg addr Abstract address object. |
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235 | * |
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236 | * @see nla_put |
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237 | * @return 0 on success or a negative error code. |
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238 | */ |
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239 | static inline int nla_put_addr(struct nl_msg *msg, int attrtype, struct nl_addr *addr) |
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240 | { |
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241 | return nla_put(msg, attrtype, nl_addr_get_len(addr), |
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242 | nl_addr_get_binary_addr(addr)); |
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243 | } |
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244 | |||
245 | /** @} */ |
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246 | |||
247 | /** |
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248 | * @name Integer Attributes |
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249 | */ |
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250 | |||
251 | /** |
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252 | * Add 8 bit integer attribute to netlink message. |
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253 | * @arg msg Netlink message. |
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254 | * @arg attrtype Attribute type. |
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255 | * @arg value Numeric value to store as payload. |
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256 | * |
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257 | * @see nla_put |
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258 | * @return 0 on success or a negative error code. |
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259 | */ |
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260 | static inline int nla_put_u8(struct nl_msg *msg, int attrtype, uint8_t value) |
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261 | { |
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262 | return nla_put(msg, attrtype, sizeof(uint8_t), &value); |
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263 | } |
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264 | |||
265 | /** |
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266 | * Return value of 8 bit integer attribute. |
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267 | * @arg nla 8 bit integer attribute |
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268 | * |
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269 | * @return Payload as 8 bit integer. |
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270 | */ |
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271 | static inline uint8_t nla_get_u8(struct nlattr *nla) |
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272 | { |
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273 | return *(uint8_t *) nla_data(nla); |
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274 | } |
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275 | |||
276 | /** |
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277 | * Add 16 bit integer attribute to netlink message. |
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278 | * @arg msg Netlink message. |
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279 | * @arg attrtype Attribute type. |
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280 | * @arg value Numeric value to store as payload. |
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281 | * |
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282 | * @see nla_put |
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283 | * @return 0 on success or a negative error code. |
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284 | */ |
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285 | static inline int nla_put_u16(struct nl_msg *msg, int attrtype, uint16_t value) |
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286 | { |
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287 | return nla_put(msg, attrtype, sizeof(uint16_t), &value); |
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288 | } |
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289 | |||
290 | /** |
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291 | * Return payload of 16 bit integer attribute. |
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292 | * @arg nla 16 bit integer attribute |
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293 | * |
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294 | * @return Payload as 16 bit integer. |
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295 | */ |
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296 | static inline uint16_t nla_get_u16(struct nlattr *nla) |
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297 | { |
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298 | return *(uint16_t *) nla_data(nla); |
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299 | } |
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300 | |||
301 | /** |
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302 | * Add 32 bit integer attribute to netlink message. |
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303 | * @arg msg Netlink message. |
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304 | * @arg attrtype Attribute type. |
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305 | * @arg value Numeric value to store as payload. |
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306 | * |
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307 | * @see nla_put |
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308 | * @return 0 on success or a negative error code. |
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309 | */ |
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310 | static inline int nla_put_u32(struct nl_msg *msg, int attrtype, uint32_t value) |
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311 | { |
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312 | return nla_put(msg, attrtype, sizeof(uint32_t), &value); |
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313 | } |
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314 | |||
315 | /** |
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316 | * Return payload of 32 bit integer attribute. |
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317 | * @arg nla 32 bit integer attribute. |
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318 | * |
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319 | * @return Payload as 32 bit integer. |
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320 | */ |
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321 | static inline uint32_t nla_get_u32(struct nlattr *nla) |
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322 | { |
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323 | return *(uint32_t *) nla_data(nla); |
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324 | } |
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325 | |||
326 | /** |
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327 | * Add 64 bit integer attribute to netlink message. |
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328 | * @arg msg Netlink message. |
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329 | * @arg attrtype Attribute type. |
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330 | * @arg value Numeric value to store as payload. |
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331 | * |
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332 | * @see nla_put |
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333 | * @return 0 on success or a negative error code. |
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334 | */ |
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335 | static inline int nla_put_u64(struct nl_msg *msg, int attrtype, uint64_t value) |
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336 | { |
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337 | return nla_put(msg, attrtype, sizeof(uint64_t), &value); |
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338 | } |
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339 | |||
340 | /** |
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341 | * Return payload of u64 attribute |
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342 | * @arg nla u64 netlink attribute |
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343 | * |
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344 | * @return Payload as 64 bit integer. |
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345 | */ |
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346 | static inline uint64_t nla_get_u64(struct nlattr *nla) |
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347 | { |
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348 | uint64_t tmp; |
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349 | |||
350 | nla_memcpy(&tmp, nla, sizeof(tmp)); |
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351 | |||
352 | return tmp; |
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353 | } |
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354 | |||
355 | /** |
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356 | * Add string attribute to netlink message. |
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357 | * @arg msg Netlink message. |
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358 | * @arg attrtype Attribute type. |
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359 | * @arg str NUL terminated string. |
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360 | * |
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361 | * @see nla_put |
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362 | * @return 0 on success or a negative error code. |
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363 | */ |
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364 | static inline int nla_put_string(struct nl_msg *msg, int attrtype, const char *str) |
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365 | { |
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366 | return nla_put(msg, attrtype, strlen(str) + 1, str); |
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367 | } |
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368 | |||
369 | /** |
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370 | * Return payload of string attribute. |
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371 | * @arg nla String attribute. |
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372 | * |
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373 | * @return Pointer to attribute payload. |
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374 | */ |
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375 | static inline char *nla_get_string(struct nlattr *nla) |
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376 | { |
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377 | return (char *) nla_data(nla); |
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378 | } |
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379 | |||
380 | static inline char *nla_strdup(struct nlattr *nla) |
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381 | { |
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382 | return strdup(nla_get_string(nla)); |
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383 | } |
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384 | |||
385 | /** @} */ |
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386 | |||
387 | /** |
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388 | * @name Flag Attribute |
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389 | */ |
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390 | |||
391 | /** |
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392 | * Add flag netlink attribute to netlink message. |
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393 | * @arg msg Netlink message. |
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394 | * @arg attrtype Attribute type. |
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395 | * |
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396 | * @see nla_put |
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397 | * @return 0 on success or a negative error code. |
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398 | */ |
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399 | static inline int nla_put_flag(struct nl_msg *msg, int attrtype) |
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400 | { |
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401 | return nla_put(msg, attrtype, 0, NULL); |
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402 | } |
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403 | |||
404 | /** |
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405 | * Return true if flag attribute is set. |
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406 | * @arg nla Flag netlink attribute. |
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407 | * |
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408 | * @return True if flag is set, otherwise false. |
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409 | */ |
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410 | static inline int nla_get_flag(struct nlattr *nla) |
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411 | { |
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412 | return !!nla; |
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413 | } |
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414 | |||
415 | /** @} */ |
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416 | |||
417 | /** |
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418 | * @name Microseconds Attribute |
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419 | */ |
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420 | |||
421 | /** |
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422 | * Add a msecs netlink attribute to a netlink message |
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423 | * @arg n netlink message |
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424 | * @arg attrtype attribute type |
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425 | * @arg msecs number of msecs |
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426 | */ |
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427 | static inline int nla_put_msecs(struct nl_msg *n, int attrtype, unsigned long msecs) |
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428 | { |
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429 | return nla_put_u64(n, attrtype, msecs); |
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430 | } |
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431 | |||
432 | /** |
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433 | * Return payload of msecs attribute |
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434 | * @arg nla msecs netlink attribute |
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435 | * |
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436 | * @return the number of milliseconds. |
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437 | */ |
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438 | static inline unsigned long nla_get_msecs(struct nlattr *nla) |
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439 | { |
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440 | return nla_get_u64(nla); |
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441 | } |
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442 | |||
443 | /** |
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444 | * Add nested attributes to netlink message. |
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445 | * @arg msg Netlink message. |
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446 | * @arg attrtype Attribute type. |
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447 | * @arg nested Message containing attributes to be nested. |
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448 | * |
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449 | * Takes the attributes found in the \a nested message and appends them |
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450 | * to the message \a msg nested in a container of the type \a attrtype. |
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451 | * The \a nested message may not have a family specific header. |
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452 | * |
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453 | * @see nla_put |
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454 | * @return 0 on success or a negative error code. |
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455 | */ |
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456 | static inline int nla_put_nested(struct nl_msg *msg, int attrtype, struct nl_msg *nested) |
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457 | { |
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458 | return nla_put(msg, attrtype, nlmsg_len(nested->nm_nlh), |
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459 | nlmsg_data(nested->nm_nlh)); |
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460 | } |
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461 | |||
462 | /** |
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463 | * Start a new level of nested attributes. |
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464 | * @arg msg Netlink message. |
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465 | * @arg attrtype Attribute type of container. |
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466 | * |
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467 | * @return Pointer to container attribute. |
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468 | */ |
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469 | static inline struct nlattr *nla_nest_start(struct nl_msg *msg, int attrtype) |
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470 | { |
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471 | struct nlattr *start = (struct nlattr *) nlmsg_tail(msg->nm_nlh); |
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472 | |||
473 | if (nla_put(msg, attrtype, 0, NULL) < 0) |
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474 | return NULL; |
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475 | |||
476 | return start; |
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477 | } |
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478 | |||
479 | /** |
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480 | * Finalize nesting of attributes. |
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481 | * @arg msg Netlink message. |
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482 | * @arg start Container attribute as returned from nla_nest_start(). |
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483 | * |
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484 | * Corrects the container attribute header to include the appeneded attributes. |
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485 | * |
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486 | * @return 0 |
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487 | */ |
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488 | static inline int nla_nest_end(struct nl_msg *msg, struct nlattr *start) |
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489 | { |
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490 | start->nla_len = (unsigned char *) nlmsg_tail(msg->nm_nlh) - |
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491 | (unsigned char *) start; |
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492 | return 0; |
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493 | } |
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494 | |||
495 | /** |
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496 | * Create attribute index based on nested attribute |
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497 | * @arg tb Index array to be filled (maxtype+1 elements). |
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498 | * @arg maxtype Maximum attribute type expected and accepted. |
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499 | * @arg nla Nested Attribute. |
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500 | * @arg policy Attribute validation policy. |
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501 | * |
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502 | * Feeds the stream of attributes nested into the specified attribute |
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503 | * to nla_parse(). |
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504 | * |
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505 | * @see nla_parse |
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506 | * @return 0 on success or a negative error code. |
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507 | */ |
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508 | static inline int nla_parse_nested(struct nlattr *tb[], int maxtype, struct nlattr *nla, |
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509 | struct nla_policy *policy) |
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510 | { |
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511 | return nla_parse(tb, maxtype, (struct nlattr *)nla_data(nla), nla_len(nla), policy); |
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512 | } |
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513 | |||
514 | /** |
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515 | * Compare attribute payload with memory area. |
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516 | * @arg nla Attribute. |
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517 | * @arg data Memory area to compare to. |
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518 | * @arg size Number of bytes to compare. |
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519 | * |
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520 | * @see memcmp(3) |
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521 | * @return An integer less than, equal to, or greater than zero. |
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522 | */ |
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523 | static inline int nla_memcmp(const struct nlattr *nla, const void *data, size_t size) |
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524 | { |
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525 | int d = nla_len(nla) - size; |
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526 | |||
527 | if (d == 0) |
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528 | d = memcmp(nla_data(nla), data, size); |
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529 | |||
530 | return d; |
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531 | } |
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532 | |||
533 | /** |
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534 | * Compare string attribute payload with string |
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535 | * @arg nla Attribute of type NLA_STRING. |
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536 | * @arg str NUL terminated string. |
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537 | * |
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538 | * @see strcmp(3) |
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539 | * @return An integer less than, equal to, or greater than zero. |
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540 | */ |
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541 | static inline int nla_strcmp(const struct nlattr *nla, const char *str) |
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542 | { |
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543 | int len = strlen(str) + 1; |
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544 | int d = nla_len(nla) - len; |
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545 | |||
546 | if (d == 0) |
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547 | d = memcmp(nla_data(nla), str, len); |
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548 | |||
549 | return d; |
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550 | } |
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551 | |||
552 | /** |
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553 | * Copy string attribute payload to a buffer. |
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554 | * @arg dst Pointer to destination buffer. |
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555 | * @arg nla Attribute of type NLA_STRING. |
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556 | * @arg dstsize Size of destination buffer in bytes. |
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557 | * |
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558 | * Copies at most dstsize - 1 bytes to the destination buffer. |
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559 | * The result is always a valid NUL terminated string. Unlike |
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560 | * strlcpy the destination buffer is always padded out. |
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561 | * |
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562 | * @return The length of string attribute without the terminating NUL. |
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563 | */ |
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564 | static inline size_t nla_strlcpy(char *dst, const struct nlattr *nla, size_t dstsize) |
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565 | { |
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566 | size_t srclen = (size_t)nla_len(nla); |
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567 | char *src = (char*)nla_data(nla); |
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568 | |||
569 | if (srclen > 0 && src[srclen - 1] == '\0') |
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570 | srclen--; |
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571 | |||
572 | if (dstsize > 0) { |
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573 | size_t len = (srclen >= dstsize) ? dstsize - 1 : srclen; |
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574 | |||
575 | memset(dst, 0, dstsize); |
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576 | memcpy(dst, src, len); |
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577 | } |
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578 | |||
579 | return srclen; |
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580 | } |
||
581 | |||
582 | |||
583 | /** |
||
584 | * @name Attribute Construction (Exception Based) |
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585 | * @{ |
||
586 | */ |
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587 | |||
588 | /** |
||
589 | * @ingroup attr |
||
590 | * Add unspecific attribute to netlink message. |
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591 | * @arg msg Netlink message. |
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592 | * @arg attrtype Attribute type. |
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593 | * @arg attrlen Length of attribute payload. |
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594 | * @arg data Head of attribute payload. |
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595 | */ |
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596 | #define NLA_PUT(msg, attrtype, attrlen, data) \ |
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597 | do { \ |
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598 | if (nla_put(msg, attrtype, attrlen, data) < 0) \ |
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599 | goto nla_put_failure; \ |
||
600 | } while(0) |
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601 | |||
602 | /** |
||
603 | * @ingroup attr |
||
604 | * Add atomic type attribute to netlink message. |
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605 | * @arg msg Netlink message. |
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606 | * @arg type Atomic type. |
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607 | * @arg attrtype Attribute type. |
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608 | * @arg value Head of attribute payload. |
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609 | */ |
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610 | #define NLA_PUT_TYPE(msg, type, attrtype, value) \ |
||
611 | do { \ |
||
612 | type __tmp = value; \ |
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613 | NLA_PUT(msg, attrtype, sizeof(type), &__tmp); \ |
||
614 | } while(0) |
||
615 | |||
616 | /** |
||
617 | * Add 8 bit integer attribute to netlink message. |
||
618 | * @arg msg Netlink message. |
||
619 | * @arg attrtype Attribute type. |
||
620 | * @arg value Numeric value. |
||
621 | */ |
||
622 | #define NLA_PUT_U8(msg, attrtype, value) \ |
||
623 | NLA_PUT_TYPE(msg, uint8_t, attrtype, value) |
||
624 | |||
625 | /** |
||
626 | * Add 16 bit integer attribute to netlink message. |
||
627 | * @arg msg Netlink message. |
||
628 | * @arg attrtype Attribute type. |
||
629 | * @arg value Numeric value. |
||
630 | */ |
||
631 | #define NLA_PUT_U16(msg, attrtype, value) \ |
||
632 | NLA_PUT_TYPE(msg, uint16_t, attrtype, value) |
||
633 | |||
634 | /** |
||
635 | * Add 32 bit integer attribute to netlink message. |
||
636 | * @arg msg Netlink message. |
||
637 | * @arg attrtype Attribute type. |
||
638 | * @arg value Numeric value. |
||
639 | */ |
||
640 | #define NLA_PUT_U32(msg, attrtype, value) \ |
||
641 | NLA_PUT_TYPE(msg, uint32_t, attrtype, value) |
||
642 | |||
643 | /** |
||
644 | * Add 64 bit integer attribute to netlink message. |
||
645 | * @arg msg Netlink message. |
||
646 | * @arg attrtype Attribute type. |
||
647 | * @arg value Numeric value. |
||
648 | */ |
||
649 | #define NLA_PUT_U64(msg, attrtype, value) \ |
||
650 | NLA_PUT_TYPE(msg, uint64_t, attrtype, value) |
||
651 | |||
652 | /** |
||
653 | * Add string attribute to netlink message. |
||
654 | * @arg msg Netlink message. |
||
655 | * @arg attrtype Attribute type. |
||
656 | * @arg value NUL terminated character string. |
||
657 | */ |
||
658 | #define NLA_PUT_STRING(msg, attrtype, value) \ |
||
659 | NLA_PUT(msg, attrtype, strlen(value) + 1, value) |
||
660 | |||
661 | /** |
||
662 | * Add flag attribute to netlink message. |
||
663 | * @arg msg Netlink message. |
||
664 | * @arg attrtype Attribute type. |
||
665 | */ |
||
666 | #define NLA_PUT_FLAG(msg, attrtype) \ |
||
667 | NLA_PUT(msg, attrtype, 0, NULL) |
||
668 | |||
669 | /** |
||
670 | * Add msecs attribute to netlink message. |
||
671 | * @arg msg Netlink message. |
||
672 | * @arg attrtype Attribute type. |
||
673 | * @arg msecs Numeric value in micro seconds. |
||
674 | */ |
||
675 | #define NLA_PUT_MSECS(msg, attrtype, msecs) \ |
||
676 | NLA_PUT_U64(msg, attrtype, msecs) |
||
677 | |||
678 | /** |
||
679 | * Add address attribute to netlink message. |
||
680 | * @arg msg Netlink message. |
||
681 | * @arg attrtype Attribute type. |
||
682 | * @arg addr Abstract address object. |
||
683 | */ |
||
684 | #define NLA_PUT_ADDR(msg, attrtype, addr) \ |
||
685 | NLA_PUT(msg, attrtype, nl_addr_get_len(addr), \ |
||
686 | nl_addr_get_binary_addr(addr)) |
||
687 | |||
688 | /** @} */ |
||
689 | |||
690 | /** |
||
691 | * @name Iterators |
||
692 | * @{ |
||
693 | */ |
||
694 | |||
695 | /** |
||
696 | * @ingroup attr |
||
697 | * Iterate over a stream of attributes |
||
698 | * @arg pos loop counter, set to current attribute |
||
699 | * @arg head head of attribute stream |
||
700 | * @arg len length of attribute stream |
||
701 | * @arg rem initialized to len, holds bytes currently remaining in stream |
||
702 | */ |
||
703 | #define nla_for_each_attr(pos, head, len, rem) \ |
||
704 | for (pos = head, rem = len; \ |
||
705 | nla_ok(pos, rem); \ |
||
706 | pos = nla_next(pos, &(rem))) |
||
707 | |||
708 | /** |
||
709 | * @ingroup attr |
||
710 | * Iterate over a stream of nested attributes |
||
711 | * @arg pos loop counter, set to current attribute |
||
712 | * @arg nla attribute containing the nested attributes |
||
713 | * @arg rem initialized to len, holds bytes currently remaining in stream |
||
714 | */ |
||
715 | #define nla_for_each_nested(pos, nla, rem) \ |
||
716 | for (pos = (struct nlattr *)nla_data(nla), rem = nla_len(nla); \ |
||
717 | nla_ok(pos, rem); \ |
||
718 | pos = nla_next(pos, &(rem))) |
||
719 | |||
720 | /** @} */ |
||
721 | |||
722 | #ifdef __cplusplus |
||
723 | } |
||
724 | #endif |
||
725 | |||
726 | #endif |