aboutsummaryrefslogtreecommitdiffstats
path: root/hicn-light/src/platforms/windows/system.c
blob: a23b7d95ef8d539558f5858e19d7065ec906de2d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
/*
 * Copyright (c) 2019 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <parc/assert/parc_Assert.h>
#include <src/config.h>

#include <stdio.h>
#include <stdlib.h>

#include <sys/types.h>

#include <errno.h>
#include <string.h>

#define WORKING_BUFFER_SIZE 15000
#define MAX_TRIES 3

#define MALLOC(x) HeapAlloc(GetProcessHeap(), 0, (x))
#define FREE(x) HeapFree(GetProcessHeap(), 0, (x))

#include <src/core/forwarder.h>
#include <src/utils/interfaceSet.h>

#include <src/utils/addressList.h>

/**
 * Returns the MTU for a named interface
 *
 * On linux, we get the MTU by opening a socket and reading SIOCGIFMTU
 *
 * @param [in] ifname Interface name (e.g. "eth0")
 *
 * @retval number The MTU in bytes
 *
 * Example:
 * @code
 * <#example#>
 * @endcode
 */
static int getMtu(const char *ifname) {
  PIP_ADAPTER_ADDRESSES pAddresses = NULL;
  PIP_ADAPTER_ADDRESSES pCurrAddresses = NULL;
  ULONG outBufLen = 0;
  ULONG flags = GAA_FLAG_INCLUDE_PREFIX;
  ULONG family = AF_UNSPEC;

  DWORD dwSize = 0;
  DWORD dwRetVal = 0;
  ULONG Iterations = 0;
  do {
    pAddresses = (IP_ADAPTER_ADDRESSES *)MALLOC(outBufLen);
    if (pAddresses == NULL) {
      printf("Memory allocation failed for IP_ADAPTER_ADDRESSES struct\n");
      exit(1);
    }

    dwRetVal =
        GetAdaptersAddresses(family, flags, NULL, pAddresses, &outBufLen);

    if (dwRetVal == ERROR_BUFFER_OVERFLOW) {
      FREE(pAddresses);
      pAddresses = NULL;
    } else {
      break;
    }

    Iterations++;

  } while ((dwRetVal == ERROR_BUFFER_OVERFLOW) && (Iterations < MAX_TRIES));

  if (dwRetVal == NO_ERROR) {
    pCurrAddresses = pAddresses;
    while (pCurrAddresses) {
      if (strcmp(pCurrAddresses->AdapterName, ifname)) {
        int mtu = pCurrAddresses->Mtu;
        if (pAddresses) {
          FREE(pAddresses);
        }
        return mtu;
      }
      pCurrAddresses = pCurrAddresses->Next;
    }
  }

  if (pAddresses) {
    FREE(pAddresses);
  }
  return -1;
}

InterfaceSet *system_Interfaces(Forwarder *forwarder) {
  InterfaceSet *set = interfaceSetCreate();

  Logger *logger = forwarder_GetLogger(forwarder);

  DWORD dwSize = 0;
  DWORD dwRetVal = 0;
  unsigned int i = 0;
  // Set the flags to pass to GetAdaptersAddresses
  ULONG flags = GAA_FLAG_INCLUDE_PREFIX;

  // default to unspecified address family (both)
  ULONG family = AF_UNSPEC;

  LPVOID lpMsgBuf = NULL;

  PIP_ADAPTER_ADDRESSES pAddresses = NULL;
  ULONG outBufLen = 0;
  ULONG Iterations = 0;

  PIP_ADAPTER_ADDRESSES pCurrAddresses = NULL;
  PIP_ADAPTER_UNICAST_ADDRESS pUnicast = NULL;
  PIP_ADAPTER_ANYCAST_ADDRESS pAnycast = NULL;
  PIP_ADAPTER_MULTICAST_ADDRESS pMulticast = NULL;
  IP_ADAPTER_DNS_SERVER_ADDRESS *pDnServer = NULL;
  IP_ADAPTER_PREFIX *pPrefix = NULL;

  outBufLen = WORKING_BUFFER_SIZE;

  do {
    pAddresses = (IP_ADAPTER_ADDRESSES *)MALLOC(outBufLen);
    parcAssertNotNull(
        pAddresses,
        "Memory allocation failed for IP_ADAPTER_ADDRESSES struct\n");
    dwRetVal =
        GetAdaptersAddresses(family, flags, NULL, pAddresses, &outBufLen);

    if (dwRetVal == ERROR_BUFFER_OVERFLOW) {
      FREE(pAddresses);
      pAddresses = NULL;
    } else {
      break;
    }

    Iterations++;

  } while ((dwRetVal == ERROR_BUFFER_OVERFLOW) && (Iterations < MAX_TRIES));
  if (dwRetVal == NO_ERROR) {
    // If successful, output some information from the data we received
    pCurrAddresses = pAddresses;
    while (pCurrAddresses) {
      if (pCurrAddresses->OperStatus == IfOperStatusUp) {
        Interface *iface =
            interfaceSetGetByName(set, pCurrAddresses->AdapterName);
        if (iface == NULL) {
          pMulticast = pCurrAddresses->FirstMulticastAddress;
          if (pMulticast) {
            for (i = 0; pMulticast != NULL; i++) pMulticast = pMulticast->Next;
          }

          iface = interfaceCreate(
              pCurrAddresses->AdapterName,
              forwarder_GetNextConnectionId(forwarder),
              pCurrAddresses->IfType == IF_TYPE_SOFTWARE_LOOPBACK, i > 0,
              pCurrAddresses->Mtu);

          interfaceSetAdd(set, iface);
          for (pUnicast = pCurrAddresses->FirstUnicastAddress; pUnicast != NULL;
               pUnicast = pUnicast->Next) {
            int family = pUnicast->Address.lpSockaddr->sa_family;

            switch (family) {
              case AF_INET: {
                char *ip = inet_ntoa(
                    ((struct sockaddr_in *)(pUnicast->Address.lpSockaddr))
                        ->sin_addr);
                Address *address = addressCreateFromInet(
                    (struct sockaddr_in *)(pUnicast->Address.lpSockaddr));
                interfaceAddAddress(iface, address);
                break;
              }

              case AF_INET6: {
                char str[INET6_ADDRSTRLEN];
                inet_ntop(
                    AF_INET6,
                    &((struct sockaddr_in6 *)(pUnicast->Address.lpSockaddr))
                         ->sin6_addr,
                    str, INET6_ADDRSTRLEN);
                Address *address = addressCreateFromInet6(
                    (struct sockaddr_in6 *)(pUnicast->Address.lpSockaddr));
                interfaceAddAddress(iface, address);
                break;
              }

              default:
                break;
            }
          }
        }
      }
      pCurrAddresses = pCurrAddresses->Next;
    }
  }

  if (pAddresses) {
    FREE(pAddresses);
  }
  return set;
}

Address *system_GetMacAddressByName(Forwarder *forwarder,
                                    const char *interfaceName) {
  return NULL;
}

unsigned system_InterfaceMtu(Forwarder *forwarder, const char *interfaceName) {
  unsigned mtu = 0;

  return mtu;
}