Ratan Gupta | 8804feb | 2017-05-25 10:49:57 +0530 | [diff] [blame] | 1 | #include <arpa/inet.h> |
| 2 | #include <dirent.h> |
| 3 | #include <net/if.h> |
Ratan Gupta | 11cef80 | 2017-05-29 08:41:48 +0530 | [diff] [blame] | 4 | #include "xyz/openbmc_project/Common/error.hpp" |
| 5 | |
| 6 | #include <phosphor-logging/log.hpp> |
| 7 | #include <phosphor-logging/elog-errors.hpp> |
Ratan Gupta | 8804feb | 2017-05-25 10:49:57 +0530 | [diff] [blame] | 8 | |
| 9 | #include <iostream> |
| 10 | #include <list> |
| 11 | #include <string> |
| 12 | #include <algorithm> |
Ratan Gupta | 8804feb | 2017-05-25 10:49:57 +0530 | [diff] [blame] | 13 | |
| 14 | namespace phosphor |
| 15 | { |
| 16 | namespace network |
| 17 | { |
| 18 | namespace |
| 19 | { |
| 20 | |
| 21 | using namespace phosphor::logging; |
Ratan Gupta | 11cef80 | 2017-05-29 08:41:48 +0530 | [diff] [blame] | 22 | using namespace sdbusplus::xyz::openbmc_project::Common::Error; |
Ratan Gupta | 8804feb | 2017-05-25 10:49:57 +0530 | [diff] [blame] | 23 | |
| 24 | uint8_t toV6Cidr(const std::string& subnetMask) |
| 25 | { |
| 26 | uint8_t pos = 0; |
| 27 | uint8_t prevPos = 0; |
| 28 | uint8_t cidr = 0; |
| 29 | uint16_t buff {}; |
| 30 | do |
| 31 | { |
| 32 | //subnet mask look like ffff:ffff:: |
| 33 | // or ffff:c000:: |
| 34 | pos = subnetMask.find(":", prevPos); |
| 35 | if (pos == std::string::npos) |
| 36 | { |
| 37 | break; |
| 38 | } |
| 39 | |
| 40 | auto str = subnetMask.substr(prevPos, (pos - prevPos)); |
| 41 | prevPos = pos + 1; |
| 42 | |
| 43 | // String length is 0 |
| 44 | if (!str.length()) |
| 45 | { |
| 46 | return cidr; |
| 47 | } |
| 48 | //converts it into number. |
| 49 | if (sscanf(str.c_str(), "%hx", &buff) <= 0) |
| 50 | { |
| 51 | log<level::ERR>("Invalid Mask", |
| 52 | entry("SUBNETMASK=%s", subnetMask)); |
| 53 | |
| 54 | return 0; |
| 55 | } |
| 56 | |
| 57 | // convert the number into bitset |
| 58 | // and check for how many ones are there. |
| 59 | // if we don't have all the ones then make |
| 60 | // sure that all the ones should be left justify. |
| 61 | |
| 62 | if (__builtin_popcount(buff) != 16) |
| 63 | { |
| 64 | if (((sizeof(buff) * 8) - (__builtin_ctz(buff))) != __builtin_popcount(buff)) |
| 65 | { |
| 66 | log<level::ERR>("Invalid Mask", |
| 67 | entry("SUBNETMASK=%s", subnetMask)); |
| 68 | |
| 69 | return 0; |
| 70 | } |
| 71 | cidr += __builtin_popcount(buff); |
| 72 | return cidr; |
| 73 | } |
| 74 | |
| 75 | cidr += 16; |
| 76 | } |
| 77 | while (1); |
| 78 | |
| 79 | return cidr; |
| 80 | } |
| 81 | }// anonymous namespace |
| 82 | |
| 83 | uint8_t toCidr(int addressFamily, const std::string& subnetMask) |
| 84 | { |
| 85 | if (addressFamily == AF_INET6) |
| 86 | { |
| 87 | return toV6Cidr(subnetMask); |
| 88 | } |
| 89 | |
| 90 | uint32_t buff; |
| 91 | |
| 92 | auto rc = inet_pton(addressFamily, subnetMask.c_str(), &buff); |
| 93 | if (rc <= 0) |
| 94 | { |
| 95 | log<level::ERR>("inet_pton failed:", |
Ratan Gupta | 11cef80 | 2017-05-29 08:41:48 +0530 | [diff] [blame] | 96 | entry("SUBNETMASK=%s", subnetMask)); |
Ratan Gupta | 8804feb | 2017-05-25 10:49:57 +0530 | [diff] [blame] | 97 | return 0; |
| 98 | } |
| 99 | |
| 100 | buff = be32toh(buff); |
| 101 | // total no of bits - total no of leading zero == total no of ones |
| 102 | if (((sizeof(buff) * 8) - (__builtin_ctz(buff))) == __builtin_popcount(buff)) |
| 103 | { |
| 104 | return __builtin_popcount(buff); |
| 105 | } |
| 106 | else |
| 107 | { |
| 108 | log<level::ERR>("Invalid Mask", |
Ratan Gupta | 11cef80 | 2017-05-29 08:41:48 +0530 | [diff] [blame] | 109 | entry("SUBNETMASK=%s", subnetMask)); |
Ratan Gupta | 8804feb | 2017-05-25 10:49:57 +0530 | [diff] [blame] | 110 | return 0; |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | std::string toMask(int addressFamily, uint8_t prefix) |
| 115 | { |
| 116 | if (addressFamily == AF_INET6) |
| 117 | { |
| 118 | //TODO:- conversion for v6 |
| 119 | return ""; |
| 120 | } |
| 121 | |
| 122 | if (prefix < 1 || prefix > 30) |
| 123 | { |
| 124 | log<level::ERR>("Invalid Prefix", |
| 125 | entry("PREFIX=%d", prefix)); |
| 126 | return ""; |
| 127 | } |
| 128 | /* Create the netmask from the number of bits */ |
| 129 | unsigned long mask = 0; |
| 130 | for (auto i = 0 ; i < prefix ; i++) |
| 131 | { |
| 132 | mask |= 1 << (31 - i); |
| 133 | } |
| 134 | struct in_addr netmask; |
| 135 | netmask.s_addr = htonl(mask); |
| 136 | return inet_ntoa(netmask); |
| 137 | } |
| 138 | |
Ratan Gupta | 11cef80 | 2017-05-29 08:41:48 +0530 | [diff] [blame] | 139 | std::string getNetworkID(int addressFamily, const std::string& ipaddress, |
| 140 | uint8_t prefix) |
| 141 | { |
| 142 | unsigned char* pntMask = nullptr; |
| 143 | unsigned char* pntNetwork = nullptr; |
| 144 | int bit {}; |
| 145 | int offset {}; |
| 146 | struct in6_addr netmask {}; |
| 147 | const u_char maskbit[] = {0x00, 0x80, 0xc0, 0xe0, 0xf0, |
| 148 | 0xf8, 0xfc, 0xfe, 0xff |
| 149 | }; |
| 150 | |
| 151 | pntMask = reinterpret_cast<unsigned char*>(&netmask); |
| 152 | |
| 153 | offset = prefix / 8; |
| 154 | bit = prefix % 8; |
| 155 | |
| 156 | while (offset--) |
| 157 | { |
| 158 | *pntMask++ = 0xff; |
| 159 | } |
| 160 | |
| 161 | if (bit) |
| 162 | { |
| 163 | *pntMask = maskbit[bit]; |
| 164 | } |
| 165 | |
| 166 | // convert ipaddres string into network address |
| 167 | struct in6_addr ipaddressNetwork; |
| 168 | if (inet_pton(addressFamily, ipaddress.c_str(), &ipaddressNetwork) <= 0) |
| 169 | { |
| 170 | log<level::ERR>("inet_pton failure", |
| 171 | entry("IPADDRESS=%s",ipaddress.c_str())); |
| 172 | report<InternalFailure>(); |
| 173 | |
| 174 | return ""; |
| 175 | } |
| 176 | |
| 177 | // Now bit wise and gets you the network address |
| 178 | pntMask = reinterpret_cast<unsigned char*>(&netmask); |
| 179 | pntNetwork = reinterpret_cast<unsigned char*>(&ipaddressNetwork); |
| 180 | |
| 181 | for (int i = 0; i < 16 ; i++) |
| 182 | { |
| 183 | pntNetwork[i] = pntNetwork[i] & pntMask[i]; |
| 184 | } |
| 185 | |
| 186 | //convert the network address into string fomat. |
| 187 | char networkString[INET6_ADDRSTRLEN] = { 0 }; |
| 188 | if (inet_ntop(addressFamily, &ipaddressNetwork, networkString, |
| 189 | INET6_ADDRSTRLEN) == NULL) |
| 190 | { |
| 191 | log<level::ERR>("inet_ntop failure"); |
| 192 | report<InternalFailure>(); |
| 193 | } |
| 194 | return networkString; |
| 195 | } |
| 196 | |
Ratan Gupta | 8804feb | 2017-05-25 10:49:57 +0530 | [diff] [blame] | 197 | bool isLinkLocal(const std::string& address) |
| 198 | { |
| 199 | std::string linklocal = "fe80"; |
| 200 | return std::mismatch(linklocal.begin(), linklocal.end(), |
| 201 | address.begin()).first == linklocal.end() ? |
| 202 | true : false; |
| 203 | } |
| 204 | |
| 205 | }//namespace network |
| 206 | }//namespace phosphor |