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 #include <net/vsock_addr.h> 21 22 void vsock_addr_init(struct sockaddr_vm *addr, u32 cid, u32 port) 23 { 24 memset(addr, 0, sizeof(*addr)); 25 addr->svm_family = AF_VSOCK; 26 addr->svm_cid = cid; 27 addr->svm_port = port; 28 } 29 EXPORT_SYMBOL_GPL(vsock_addr_init); 30 31 int vsock_addr_validate(const struct sockaddr_vm *addr) 32 { 33 if (!addr) 34 return -EFAULT; 35 36 if (addr->svm_family != AF_VSOCK) 37 return -EAFNOSUPPORT; 38 39 if (addr->svm_zero[0] != 0) 40 return -EINVAL; 41 42 return 0; 43 } 44 EXPORT_SYMBOL_GPL(vsock_addr_validate); 45 46 bool vsock_addr_bound(const struct sockaddr_vm *addr) 47 { 48 return addr->svm_port != VMADDR_PORT_ANY; 49 } 50 EXPORT_SYMBOL_GPL(vsock_addr_bound); 51 52 void vsock_addr_unbind(struct sockaddr_vm *addr) 53 { 54 vsock_addr_init(addr, VMADDR_CID_ANY, VMADDR_PORT_ANY); 55 } 56 EXPORT_SYMBOL_GPL(vsock_addr_unbind); 57 58 bool vsock_addr_equals_addr(const struct sockaddr_vm *addr, 59 const struct sockaddr_vm *other) 60 { 61 return addr->svm_cid == other->svm_cid && 62 addr->svm_port == other->svm_port; 63 } 64 EXPORT_SYMBOL_GPL(vsock_addr_equals_addr); 65 66 int vsock_addr_cast(const struct sockaddr *addr, 67 size_t len, struct sockaddr_vm **out_addr) 68 { 69 if (len < sizeof(**out_addr)) 70 return -EFAULT; 71 72 *out_addr = (struct sockaddr_vm *)addr; 73 return vsock_addr_validate(*out_addr); 74 } 75 EXPORT_SYMBOL_GPL(vsock_addr_cast); 76