1 | /* $Id: VBoxNetAdpCtl.cpp 57358 2015-08-14 15:16:38Z vboxsync $ */
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2 | /** @file
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3 | * Apps - VBoxAdpCtl, Configuration tool for vboxnetX adapters.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2009-2012 Oracle Corporation
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8 | *
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9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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10 | * available from http://www.virtualbox.org. This file is free software;
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11 | * you can redistribute it and/or modify it under the terms of the GNU
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12 | * General Public License (GPL) as published by the Free Software
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13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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16 | */
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17 |
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18 |
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19 |
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20 | /*********************************************************************************************************************************
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21 | * Header Files *
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22 | *********************************************************************************************************************************/
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23 | #include <stdio.h>
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24 | #include <stdlib.h>
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25 | #include <string.h>
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26 | #include <unistd.h>
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27 | #include <sys/wait.h>
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28 | #include <sys/ioctl.h>
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29 | #include <sys/stat.h>
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30 | #include <fcntl.h>
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31 | #ifdef RT_OS_LINUX
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32 | # include <net/if.h>
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33 | # include <linux/types.h>
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34 | /* Older versions of ethtool.h rely on these: */
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35 | typedef unsigned long long u64;
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36 | typedef __uint32_t u32;
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37 | typedef __uint16_t u16;
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38 | typedef __uint8_t u8;
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39 | # include <linux/ethtool.h>
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40 | # include <linux/sockios.h>
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41 | #endif
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42 | #ifdef RT_OS_SOLARIS
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43 | # include <sys/ioccom.h>
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44 | #endif
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45 |
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46 | /** @todo Error codes must be moved to some header file */
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47 | #define ADPCTLERR_BAD_NAME 2
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48 | #define ADPCTLERR_NO_CTL_DEV 3
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49 | #define ADPCTLERR_IOCTL_FAILED 4
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50 | #define ADPCTLERR_SOCKET_FAILED 5
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51 |
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52 | /** @todo These are duplicates from src/VBox/HostDrivers/VBoxNetAdp/VBoxNetAdpInternal.h */
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53 | #define VBOXNETADP_CTL_DEV_NAME "/dev/vboxnetctl"
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54 | #define VBOXNETADP_MAX_INSTANCES 128
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55 | #define VBOXNETADP_NAME "vboxnet"
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56 | #define VBOXNETADP_MAX_NAME_LEN 32
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57 | #define VBOXNETADP_CTL_ADD _IOWR('v', 1, VBOXNETADPREQ)
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58 | #define VBOXNETADP_CTL_REMOVE _IOW('v', 2, VBOXNETADPREQ)
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59 | typedef struct VBoxNetAdpReq
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60 | {
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61 | char szName[VBOXNETADP_MAX_NAME_LEN];
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62 | } VBOXNETADPREQ;
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63 | typedef VBOXNETADPREQ *PVBOXNETADPREQ;
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64 |
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65 | #define VBOXADPCTL_IFCONFIG_PATH1 "/sbin/ifconfig"
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66 | #define VBOXADPCTL_IFCONFIG_PATH2 "/bin/ifconfig"
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67 | static char *g_pszIfConfig;
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68 |
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69 | #if defined(RT_OS_LINUX)
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70 | # define VBOXADPCTL_DEL_CMD "del"
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71 | # define VBOXADPCTL_ADD_CMD "add"
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72 | #elif defined(RT_OS_SOLARIS)
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73 | # define VBOXADPCTL_DEL_CMD "removeif"
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74 | # define VBOXADPCTL_ADD_CMD "addif"
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75 | #else
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76 | # define VBOXADPCTL_DEL_CMD "delete"
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77 | # define VBOXADPCTL_ADD_CMD "add"
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78 | #endif
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79 |
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80 | static void showUsage(void)
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81 | {
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82 | fprintf(stderr, "Usage: VBoxNetAdpCtl <adapter> <address> ([netmask <address>] | remove)\n");
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83 | fprintf(stderr, " | VBoxNetAdpCtl [<adapter>] add\n");
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84 | fprintf(stderr, " | VBoxNetAdpCtl <adapter> remove\n");
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85 | }
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86 |
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87 | static void setPathIfConfig(void)
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88 | {
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89 | struct stat s;
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90 | if ( !stat(VBOXADPCTL_IFCONFIG_PATH1, &s)
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91 | && S_ISREG(s.st_mode))
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92 | g_pszIfConfig = (char*)VBOXADPCTL_IFCONFIG_PATH1;
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93 | else
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94 | g_pszIfConfig = (char*)VBOXADPCTL_IFCONFIG_PATH2;
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95 | }
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96 |
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97 | static int executeIfconfig(const char *pcszAdapterName, const char *pcszArg1,
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98 | const char *pcszArg2 = NULL,
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99 | const char *pcszArg3 = NULL,
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100 | const char *pcszArg4 = NULL,
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101 | const char *pcszArg5 = NULL)
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102 | {
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103 | const char * const argv[] =
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104 | {
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105 | g_pszIfConfig,
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106 | pcszAdapterName,
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107 | pcszArg1, /* [address family] */
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108 | pcszArg2, /* address */
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109 | pcszArg3, /* ['netmask'] */
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110 | pcszArg4, /* [network mask] */
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111 | pcszArg5, /* [network mask] */
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112 | NULL /* terminator */
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113 | };
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114 | char * const envp[] = { (char*)"LC_ALL=C", NULL };
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115 | int rc = EXIT_SUCCESS;
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116 | pid_t childPid = fork();
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117 | switch (childPid)
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118 | {
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119 | case -1: /* Something went wrong. */
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120 | perror("fork() failed");
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121 | rc = EXIT_FAILURE;
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122 | break;
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123 | case 0: /* Child process. */
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124 | if (execve(argv[0], (char * const*)argv, envp) == -1)
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125 | rc = EXIT_FAILURE;
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126 | break;
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127 | default: /* Parent process. */
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128 | waitpid(childPid, &rc, 0);
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129 | break;
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130 | }
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131 |
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132 | return rc;
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133 | }
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134 |
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135 | #define MAX_ADDRESSES 128
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136 | #define MAX_ADDRLEN 64
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137 |
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138 | static bool removeAddresses(char *pszAdapterName)
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139 | {
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140 | char szBuf[1024];
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141 | char aszAddresses[MAX_ADDRESSES][MAX_ADDRLEN];
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142 | int rc;
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143 | int fds[2];
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144 | char * const argv[] = { g_pszIfConfig, pszAdapterName, NULL };
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145 | char * const envp[] = { (char*)"LC_ALL=C", NULL };
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146 |
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147 | memset(aszAddresses, 0, sizeof(aszAddresses));
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148 |
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149 | rc = pipe(fds);
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150 | if (rc < 0)
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151 | return false;
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152 |
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153 | pid_t pid = fork();
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154 | if (pid < 0)
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155 | return false;
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156 |
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157 | if (pid == 0)
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158 | {
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159 | /* child */
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160 | close(fds[0]);
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161 | close(STDOUT_FILENO);
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162 | rc = dup2(fds[1], STDOUT_FILENO);
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163 | if (rc >= 0)
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164 | execve(argv[0], argv, envp);
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165 | return false;
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166 | }
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167 |
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168 | /* parent */
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169 | close(fds[1]);
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170 | FILE *fp = fdopen(fds[0], "r");
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171 | if (!fp)
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172 | return false;
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173 |
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174 | int cAddrs;
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175 | for (cAddrs = 0; cAddrs < MAX_ADDRESSES && fgets(szBuf, sizeof(szBuf), fp);)
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176 | {
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177 | int cbSkipWS = strspn(szBuf, " \t");
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178 | char *pszWord = strtok(szBuf + cbSkipWS, " ");
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179 | /* We are concerned with IPv6 address lines only. */
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180 | if (!pszWord || strcmp(pszWord, "inet6"))
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181 | continue;
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182 | #ifdef RT_OS_LINUX
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183 | pszWord = strtok(NULL, " ");
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184 | /* Skip "addr:". */
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185 | if (!pszWord || strcmp(pszWord, "addr:"))
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186 | continue;
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187 | #endif
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188 | pszWord = strtok(NULL, " ");
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189 | /* Skip link-local addresses. */
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190 | if (!pszWord || !strncmp(pszWord, "fe80", 4))
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191 | continue;
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192 | strncpy(aszAddresses[cAddrs++], pszWord, MAX_ADDRLEN-1);
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193 | }
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194 | fclose(fp);
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195 |
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196 | for (int i = 0; i < cAddrs; i++)
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197 | {
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198 | if (executeIfconfig(pszAdapterName, "inet6",
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199 | VBOXADPCTL_DEL_CMD, aszAddresses[i]) != EXIT_SUCCESS)
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200 | return false;
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201 | }
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202 |
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203 | return true;
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204 | }
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205 |
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206 | static int doIOCtl(unsigned long uCmd, VBOXNETADPREQ *pReq)
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207 | {
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208 | int fd = open(VBOXNETADP_CTL_DEV_NAME, O_RDWR);
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209 | if (fd == -1)
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210 | {
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211 | fprintf(stderr, "VBoxNetAdpCtl: Error while %s %s: ",
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212 | uCmd == VBOXNETADP_CTL_REMOVE ? "removing" : "adding",
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213 | pReq->szName[0] ? pReq->szName : "new interface");
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214 | perror("failed to open " VBOXNETADP_CTL_DEV_NAME);
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215 | return ADPCTLERR_NO_CTL_DEV;
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216 | }
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217 |
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218 | int rc = ioctl(fd, uCmd, pReq);
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219 | if (rc == -1)
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220 | {
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221 | fprintf(stderr, "VBoxNetAdpCtl: Error while %s %s: ",
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222 | uCmd == VBOXNETADP_CTL_REMOVE ? "removing" : "adding",
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223 | pReq->szName[0] ? pReq->szName : "new interface");
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224 | perror("VBoxNetAdpCtl: ioctl failed for " VBOXNETADP_CTL_DEV_NAME);
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225 | rc = ADPCTLERR_IOCTL_FAILED;
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226 | }
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227 |
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228 | close(fd);
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229 |
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230 | return rc;
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231 | }
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232 |
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233 | static int checkAdapterName(const char *pcszNameIn, char *pszNameOut)
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234 | {
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235 | int iAdapterIndex = -1;
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236 |
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237 | if ( strlen(pcszNameIn) >= VBOXNETADP_MAX_NAME_LEN
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238 | || sscanf(pcszNameIn, "vboxnet%d", &iAdapterIndex) != 1
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239 | || iAdapterIndex < 0 || iAdapterIndex >= VBOXNETADP_MAX_INSTANCES )
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240 | {
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241 | fprintf(stderr, "VBoxNetAdpCtl: Setting configuration for '%s' is not supported.\n", pcszNameIn);
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242 | return ADPCTLERR_BAD_NAME;
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243 | }
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244 | sprintf(pszNameOut, "vboxnet%d", iAdapterIndex);
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245 | if (strcmp(pszNameOut, pcszNameIn))
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246 | {
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247 | fprintf(stderr, "VBoxNetAdpCtl: Invalid adapter name '%s'.\n", pcszNameIn);
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248 | return ADPCTLERR_BAD_NAME;
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249 | }
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250 |
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251 | return 0;
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252 | }
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253 |
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254 | int main(int argc, char *argv[])
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255 | {
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256 | char szAdapterName[VBOXNETADP_MAX_NAME_LEN];
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257 | char *pszAdapterName = NULL;
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258 | const char *pszAddress = NULL;
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259 | const char *pszNetworkMask = NULL;
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260 | const char *pszOption = NULL;
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261 | int rc = EXIT_SUCCESS;
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262 | bool fRemove = false;
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263 | VBOXNETADPREQ Req;
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264 |
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265 | setPathIfConfig();
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266 |
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267 | switch (argc)
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268 | {
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269 | case 5:
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270 | {
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271 | /* Add a netmask to existing interface */
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272 | if (strcmp("netmask", argv[3]))
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273 | {
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274 | fprintf(stderr, "Invalid argument: %s\n\n", argv[3]);
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275 | showUsage();
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276 | return 1;
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277 | }
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278 | pszOption = "netmask";
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279 | pszNetworkMask = argv[4];
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280 | pszAdapterName = argv[1];
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281 | pszAddress = argv[2];
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282 | break;
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283 | }
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284 |
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285 | case 4:
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286 | {
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287 | /* Remove a single address from existing interface */
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288 | if (strcmp("remove", argv[3]))
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289 | {
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290 | fprintf(stderr, "Invalid argument: %s\n\n", argv[3]);
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291 | showUsage();
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292 | return 1;
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293 | }
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294 | fRemove = true;
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295 | pszAdapterName = argv[1];
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296 | pszAddress = argv[2];
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297 | break;
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298 | }
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299 |
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300 | case 3:
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301 | {
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302 | pszAdapterName = argv[1];
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303 | memset(&Req, '\0', sizeof(Req));
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304 | #ifdef RT_OS_LINUX
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305 | if (strcmp("speed", argv[2]) == 0)
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306 | {
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307 | /*
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308 | * This ugly hack is needed for retrieving the link speed on
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309 | * pre-2.6.33 kernels (see @bugref{6345}).
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310 | */
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311 | if (strlen(pszAdapterName) >= IFNAMSIZ)
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312 | {
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313 | showUsage();
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314 | return -1;
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315 | }
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316 | struct ifreq IfReq;
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317 | struct ethtool_value EthToolVal;
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318 | struct ethtool_cmd EthToolReq;
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319 | int fd = socket(AF_INET, SOCK_DGRAM, 0);
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320 | if (fd < 0)
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321 | {
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322 | fprintf(stderr, "VBoxNetAdpCtl: Error while retrieving link "
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323 | "speed for %s: ", pszAdapterName);
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324 | perror("VBoxNetAdpCtl: failed to open control socket");
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325 | return ADPCTLERR_SOCKET_FAILED;
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326 | }
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327 | /* Get link status first. */
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328 | memset(&EthToolVal, 0, sizeof(EthToolVal));
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329 | memset(&IfReq, 0, sizeof(IfReq));
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330 | snprintf(IfReq.ifr_name, sizeof(IfReq.ifr_name), "%s", pszAdapterName);
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331 |
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332 | EthToolVal.cmd = ETHTOOL_GLINK;
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333 | IfReq.ifr_data = (caddr_t)&EthToolVal;
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334 | rc = ioctl(fd, SIOCETHTOOL, &IfReq);
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335 | if (rc == 0)
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336 | {
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337 | if (EthToolVal.data)
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338 | {
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339 | memset(&IfReq, 0, sizeof(IfReq));
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340 | snprintf(IfReq.ifr_name, sizeof(IfReq.ifr_name), "%s", pszAdapterName);
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341 | EthToolReq.cmd = ETHTOOL_GSET;
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342 | IfReq.ifr_data = (caddr_t)&EthToolReq;
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343 | rc = ioctl(fd, SIOCETHTOOL, &IfReq);
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344 | if (rc == 0)
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345 | {
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346 | printf("%u", EthToolReq.speed);
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347 | }
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348 | else
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349 | {
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350 | fprintf(stderr, "VBoxNetAdpCtl: Error while retrieving link "
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351 | "speed for %s: ", pszAdapterName);
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352 | perror("VBoxNetAdpCtl: ioctl failed");
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353 | rc = ADPCTLERR_IOCTL_FAILED;
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354 | }
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355 | }
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356 | else
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357 | printf("0");
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358 | }
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359 | else
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360 | {
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361 | fprintf(stderr, "VBoxNetAdpCtl: Error while retrieving link "
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362 | "status for %s: ", pszAdapterName);
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363 | perror("VBoxNetAdpCtl: ioctl failed");
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364 | rc = ADPCTLERR_IOCTL_FAILED;
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365 | }
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366 |
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367 | close(fd);
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368 | return rc;
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369 | }
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370 | #endif
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371 | rc = checkAdapterName(pszAdapterName, szAdapterName);
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372 | if (rc)
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373 | return rc;
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374 | snprintf(Req.szName, sizeof(Req.szName), "%s", szAdapterName);
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375 | pszAddress = argv[2];
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376 | if (strcmp("remove", pszAddress) == 0)
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377 | {
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378 | /* Remove an existing interface */
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379 | #ifdef RT_OS_SOLARIS
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380 | return 1;
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381 | #else
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382 | return doIOCtl(VBOXNETADP_CTL_REMOVE, &Req);
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383 | #endif
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384 | }
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385 | else if (strcmp("add", pszAddress) == 0)
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386 | {
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387 | /* Create an interface with given name */
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388 | #ifdef RT_OS_SOLARIS
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389 | return 1;
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390 | #else
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391 | rc = doIOCtl(VBOXNETADP_CTL_ADD, &Req);
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392 | if (rc == 0)
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393 | puts(Req.szName);
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394 | #endif
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395 | return rc;
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396 | }
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397 | break;
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398 | }
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399 |
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400 | case 2:
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401 | {
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402 | /* Create a new interface */
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403 | if (strcmp("add", argv[1]) == 0)
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404 | {
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405 | #ifdef RT_OS_SOLARIS
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406 | return 1;
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407 | #else
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408 | memset(&Req, '\0', sizeof(Req));
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409 | rc = doIOCtl(VBOXNETADP_CTL_ADD, &Req);
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410 | if (rc == 0)
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411 | puts(Req.szName);
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412 | #endif
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413 | return rc;
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414 | }
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415 | /* Fall through */
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416 | }
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417 |
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418 | default:
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419 | fprintf(stderr, "Invalid number of arguments.\n\n");
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420 | /* Fall through */
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421 | case 1:
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422 | showUsage();
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423 | return 1;
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424 | }
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425 |
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426 | rc = checkAdapterName(pszAdapterName, szAdapterName);
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427 | if (rc)
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428 | return rc;
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429 |
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430 | pszAdapterName = szAdapterName;
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431 |
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432 | if (fRemove)
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433 | {
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434 | if (strchr(pszAddress, ':'))
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435 | rc = executeIfconfig(pszAdapterName, "inet6", VBOXADPCTL_DEL_CMD, pszAddress);
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436 | else
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437 | {
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438 | #if defined(RT_OS_LINUX)
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439 | rc = executeIfconfig(pszAdapterName, "0.0.0.0");
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440 | #else
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441 | rc = executeIfconfig(pszAdapterName, VBOXADPCTL_DEL_CMD, pszAddress);
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442 | #endif
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443 |
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444 | #ifdef RT_OS_SOLARIS
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445 | /* On Solaris we can unplumb the ipv4 interface */
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446 | executeIfconfig(pszAdapterName, "inet", "unplumb");
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447 | #endif
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448 | }
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449 | }
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450 | else
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451 | {
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452 | /* We are setting/replacing address. */
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453 | if (strchr(pszAddress, ':'))
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454 | {
|
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455 | #ifdef RT_OS_SOLARIS
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456 | /* On Solaris we need to plumb the interface first if it's not already plumbed. */
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457 | if (executeIfconfig(pszAdapterName, "inet6") != 0)
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458 | executeIfconfig(pszAdapterName, "inet6", "plumb", "up");
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459 | #endif
|
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460 | /*
|
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461 | * Before we set IPv6 address we'd like to remove
|
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462 | * all previously assigned addresses except the
|
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463 | * self-assigned one.
|
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464 | */
|
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465 | if (!removeAddresses(pszAdapterName))
|
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466 | rc = EXIT_FAILURE;
|
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467 | else
|
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468 | rc = executeIfconfig(pszAdapterName, "inet6", VBOXADPCTL_ADD_CMD, pszAddress, pszOption, pszNetworkMask);
|
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469 | }
|
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470 | else
|
---|
471 | {
|
---|
472 | #ifdef RT_OS_SOLARIS
|
---|
473 | /* On Solaris we need to plumb the interface first if it's not already plumbed. */
|
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474 | if (executeIfconfig(pszAdapterName, "inet") != 0)
|
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475 | executeIfconfig(pszAdapterName, "plumb", "up");
|
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476 | #endif
|
---|
477 | rc = executeIfconfig(pszAdapterName, pszAddress, pszOption, pszNetworkMask);
|
---|
478 | }
|
---|
479 | }
|
---|
480 | return rc;
|
---|
481 | }
|
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482 |
|
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