1 /* 2 * VMware vSockets Driver 3 * 4 * Copyright (C) 2007-2012 VMware, Inc. All rights reserved. 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License as published by the Free 8 * Software Foundation version 2 and no later version. 9 * 10 * This program is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 13 * more details. 14 */ 15 16 #include <linux/types.h> 17 #include <linux/socket.h> 18 #include <linux/stddef.h> 19 #include <net/sock.h> 20 21 #include "vsock_addr.h" 22 23 void vsock_addr_init(struct sockaddr_vm *addr, u32 cid, u32 port) 24 { 25 memset(addr, 0, sizeof(*addr)); 26 addr->svm_family = AF_VSOCK; 27 addr->svm_cid = cid; 28 addr->svm_port = port; 29 } 30 EXPORT_SYMBOL_GPL(vsock_addr_init); 31 32 int vsock_addr_validate(const struct sockaddr_vm *addr) 33 { 34 if (!addr) 35 return -EFAULT; 36 37 if (addr->svm_family != AF_VSOCK) 38 return -EAFNOSUPPORT; 39 40 if (addr->svm_zero[0] != 0) 41 return -EINVAL; 42 43 return 0; 44 } 45 EXPORT_SYMBOL_GPL(vsock_addr_validate); 46 47 bool vsock_addr_bound(const struct sockaddr_vm *addr) 48 { 49 return addr->svm_port != VMADDR_PORT_ANY; 50 } 51 EXPORT_SYMBOL_GPL(vsock_addr_bound); 52 53 void vsock_addr_unbind(struct sockaddr_vm *addr) 54 { 55 vsock_addr_init(addr, VMADDR_CID_ANY, VMADDR_PORT_ANY); 56 } 57 EXPORT_SYMBOL_GPL(vsock_addr_unbind); 58 59 bool vsock_addr_equals_addr(const struct sockaddr_vm *addr, 60 const struct sockaddr_vm *other) 61 { 62 return addr->svm_cid == other->svm_cid && 63 addr->svm_port == other->svm_port; 64 } 65 EXPORT_SYMBOL_GPL(vsock_addr_equals_addr); 66 67 int vsock_addr_cast(const struct sockaddr *addr, 68 size_t len, struct sockaddr_vm **out_addr) 69 { 70 if (len < sizeof(**out_addr)) 71 return -EFAULT; 72 73 *out_addr = (struct sockaddr_vm *)addr; 74 return vsock_addr_validate(*out_addr); 75 } 76 EXPORT_SYMBOL_GPL(vsock_addr_cast); 77