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
|
/*************************************************
* Exim - an Internet mail transport agent *
*************************************************/
/* Copyright (c) The Exim Maintainers 2022 */
/* Copyright (c) University of Cambridge 2001 */
/* See the file NOTICE for conditions of use and distribution. */
/* Irix-specific code. This is concatenated onto the generic src/os.c file.
Irix has a unique way of finding all the network interfaces, so we provide a
unique function here, and define FIND_RUNNING_INTERFACES to stop src/os.c
trying to provide the function. The macro may be set initially anyway, when
compiling os. for utilities that don't want this function. */
#ifndef FIND_RUNNING_INTERFACES
#define FIND_RUNNING_INTERFACES
/* This is the special form of the function using sysctl() which is the only
form that returns all the aliases on IRIX systems. This code has its origins
in a sample program that came from within SGI. */
#include <sys/sysctl.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <net/soioctl.h>
#include <net/route.h>
#define ROUNDUP(a) ((a) > 0 ? (1 + (((a) - 1) | (sizeof(__uint64_t) -1))) \
: sizeof(__uint64_t))
#ifdef _HAVE_SA_LEN
#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
#else
#define ADVANCE(x, n) (x += ROUNDUP(_FAKE_SA_LEN_DST(n)))
#endif
ip_address_item *
os_find_running_interfaces(void)
{
ip_address_item *yield = NULL;
ip_address_item *last = NULL;
ip_address_item *next;
size_t needed;
int mib[6];
char *buf, *nextaddr, *lim;
register struct if_msghdr *ifm;
mib[0] = CTL_NET;
mib[1] = PF_ROUTE;
mib[2] = 0;
mib[3] = 0;
mib[4] = NET_RT_IFLIST;
mib[5] = 0;
/* Get an estimate of the amount of store needed, then get the store and
get the data into it. Any error causes a panic death. */
if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
log_write(0, LOG_PANIC_DIE, "iflist-sysctl-estimate failed: %s",
strerror(errno));
buf = store_get(needed, GET_UNTAINTED);
if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
log_write(0, LOG_PANIC_DIE, "sysctl of ifnet list failed: %s",
strerror(errno));
/* Now fish out the data for each interface */
lim = buf + needed;
for (nextaddr = buf; nextaddr < lim; nextaddr += ifm->ifm_msglen)
{
ifm = (struct if_msghdr *)nextaddr;
if (ifm->ifm_type != RTM_IFINFO)
{
struct ifa_msghdr *ifam = (struct ifa_msghdr *)ifm;
struct sockaddr_in *mask = NULL, *addr = NULL;
if ((ifam->ifam_addrs & RTA_NETMASK) != 0)
mask = (struct sockaddr_in *)(ifam + 1);
if ((ifam->ifam_addrs & RTA_IFA) != 0)
{
char *cp = CS mask;
struct sockaddr *sa = (struct sockaddr *)mask;
ADVANCE(cp, sa);
addr = (struct sockaddr_in *)cp;
}
/* Create a data block for the address, fill in the data, and put it on
the chain. This data has to survive for ever, so use malloc. */
if (addr != NULL)
{
next = store_malloc(sizeof(ip_address_item));
next->next = NULL;
next->port = 0;
(void)host_ntoa(-1, addr, next->address, NULL);
if (yield == NULL) yield = last = next; else
{
last->next = next;
last = next;
}
DEBUG(D_interface) debug_printf("Actual local interface address is %s\n",
last->address);
}
}
}
return yield;
}
#endif /* FIND_RUNNING_INTERFACES */
/* End of os.c-IRIX */
|
