.. | .. |
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| 1 | +// SPDX-License-Identifier: GPL-2.0-only |
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1 | 2 | /* |
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2 | 3 | * Copyright 2009, Oracle. All rights reserved. |
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3 | 4 | * |
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.. | .. |
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161 | 162 | const size_t buflen, const char *delim, |
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162 | 163 | struct sockaddr_in6 *sin6) |
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163 | 164 | { |
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164 | | - char *p; |
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| 165 | + char p[IPV6_SCOPE_ID_LEN + 1]; |
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165 | 166 | size_t len; |
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| 167 | + u32 scope_id = 0; |
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| 168 | + struct net_device *dev; |
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166 | 169 | |
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167 | 170 | if ((buf + buflen) == delim) |
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168 | 171 | return 1; |
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.. | .. |
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174 | 177 | return 0; |
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175 | 178 | |
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176 | 179 | len = (buf + buflen) - delim - 1; |
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177 | | - p = kstrndup(delim + 1, len, GFP_KERNEL); |
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178 | | - if (p) { |
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179 | | - u32 scope_id = 0; |
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180 | | - struct net_device *dev; |
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| 180 | + if (len > IPV6_SCOPE_ID_LEN) |
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| 181 | + return 0; |
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181 | 182 | |
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182 | | - dev = dev_get_by_name(net, p); |
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183 | | - if (dev != NULL) { |
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184 | | - scope_id = dev->ifindex; |
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185 | | - dev_put(dev); |
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186 | | - } else { |
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187 | | - if (kstrtou32(p, 10, &scope_id) != 0) { |
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188 | | - kfree(p); |
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189 | | - return 0; |
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190 | | - } |
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191 | | - } |
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| 183 | + memcpy(p, delim + 1, len); |
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| 184 | + p[len] = 0; |
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192 | 185 | |
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193 | | - kfree(p); |
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194 | | - |
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195 | | - sin6->sin6_scope_id = scope_id; |
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196 | | - return 1; |
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| 186 | + dev = dev_get_by_name(net, p); |
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| 187 | + if (dev != NULL) { |
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| 188 | + scope_id = dev->ifindex; |
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| 189 | + dev_put(dev); |
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| 190 | + } else { |
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| 191 | + if (kstrtou32(p, 10, &scope_id) != 0) |
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| 192 | + return 0; |
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197 | 193 | } |
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198 | 194 | |
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199 | | - return 0; |
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| 195 | + sin6->sin6_scope_id = scope_id; |
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| 196 | + return 1; |
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200 | 197 | } |
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201 | 198 | |
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202 | 199 | static size_t rpc_pton6(struct net *net, const char *buf, const size_t buflen, |
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