Source code

Revision control

Other Tools

1
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
3
/* This Source Code Form is subject to the terms of the Mozilla Public
4
* License, v. 2.0. If a copy of the MPL was not distributed with this
5
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6
7
#include <string.h>
8
#include <unistd.h>
9
#include <sys/ioctl.h>
10
#include <sys/socket.h>
11
#include <sys/types.h>
12
#include <net/if.h>
13
#include <netdb.h>
14
15
#include "mozilla/DebugOnly.h"
16
#include "mozilla/ScopeExit.h"
17
18
#include "NetworkInfoServiceImpl.h"
19
20
namespace mozilla {
21
namespace net {
22
23
static nsresult ListInterfaceAddresses(int aFd, const char* aIface,
24
AddrMapType& aAddrMap);
25
26
nsresult DoListAddresses(AddrMapType& aAddrMap) {
27
int fd = socket(AF_INET, SOCK_DGRAM, 0);
28
if (fd < 0) {
29
return NS_ERROR_FAILURE;
30
}
31
32
auto autoCloseSocket = MakeScopeExit([&] { close(fd); });
33
34
struct ifconf ifconf;
35
/* 16k of space should be enough to list all interfaces. Worst case, if it's
36
* not then we will error out and fail to list addresses. This should only
37
* happen on pathological machines with way too many interfaces.
38
*/
39
char buf[16384];
40
41
ifconf.ifc_len = sizeof(buf);
42
ifconf.ifc_buf = buf;
43
if (ioctl(fd, SIOCGIFCONF, &ifconf) != 0) {
44
return NS_ERROR_FAILURE;
45
}
46
47
struct ifreq* ifreq = ifconf.ifc_req;
48
int i = 0;
49
while (i < ifconf.ifc_len) {
50
size_t len = IFNAMSIZ + ifreq->ifr_addr.sa_len;
51
52
DebugOnly<nsresult> rv =
53
ListInterfaceAddresses(fd, ifreq->ifr_name, aAddrMap);
54
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "ListInterfaceAddresses failed");
55
56
ifreq = (struct ifreq*)((char*)ifreq + len);
57
i += len;
58
}
59
60
autoCloseSocket.release();
61
return NS_OK;
62
}
63
64
static nsresult ListInterfaceAddresses(int aFd, const char* aInterface,
65
AddrMapType& aAddrMap) {
66
struct ifreq ifreq;
67
memset(&ifreq, 0, sizeof(struct ifreq));
68
strncpy(ifreq.ifr_name, aInterface, IFNAMSIZ - 1);
69
if (ioctl(aFd, SIOCGIFADDR, &ifreq) != 0) {
70
return NS_ERROR_FAILURE;
71
}
72
73
char host[128];
74
int family;
75
switch (family = ifreq.ifr_addr.sa_family) {
76
case AF_INET:
77
case AF_INET6:
78
getnameinfo(&ifreq.ifr_addr, sizeof(ifreq.ifr_addr), host, sizeof(host),
79
nullptr, 0, NI_NUMERICHOST);
80
break;
81
case AF_UNSPEC:
82
return NS_OK;
83
default:
84
// Unknown family.
85
return NS_OK;
86
}
87
88
nsCString ifaceStr;
89
ifaceStr.AssignASCII(aInterface);
90
91
nsCString addrStr;
92
addrStr.AssignASCII(host);
93
94
aAddrMap.Put(ifaceStr, addrStr);
95
96
return NS_OK;
97
}
98
99
} // namespace net
100
} // namespace mozilla