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
|
/*
* lookup.c - Lookup IP address, HW address, netmask
*
* $Id$
*/
#include <sys/types.h>
#include <sys/socket.h>
#ifdef _AIX32
#include <sys/time.h> /* for struct timeval in net/if.h */
#endif
#include <net/if.h>
#include <netinet/in.h>
#ifdef ETC_ETHERS
#include <netinet/if_ether.h>
extern int ether_hostton();
#endif
#include <netdb.h>
#include <syslog.h>
#ifndef USE_BFUNCS
#include <memory.h>
/* Yes, memcpy is OK here (no overlapped copies). */
#define bcopy(a,b,c) memcpy(b,a,c)
#endif
#include "bootp.h"
#include "lookup.h"
#include "report.h"
/*
* Lookup an Ethernet address and return it.
* Return NULL if addr not found.
*/
u_char *
lookup_hwa(hostname, htype)
char *hostname;
int htype;
{
switch (htype) {
/* XXX - How is this done on other systems? -gwr */
#ifdef ETC_ETHERS
case HTYPE_ETHERNET:
case HTYPE_IEEE802:
{
static struct ether_addr ea;
/* This does a lookup in /etc/ethers */
if (ether_hostton(hostname, &ea)) {
report(LOG_ERR, "no HW addr for host \"%s\"",
hostname);
return (u_char *) 0;
}
return (u_char *) & ea;
}
#endif /* ETC_ETHERS */
default:
report(LOG_ERR, "no lookup for HW addr type %d", htype);
} /* switch */
/* If the system can't do it, just return an error. */
return (u_char *) 0;
}
/*
* Lookup an IP address.
* Return non-zero on failure.
*/
int
lookup_ipa(hostname, result)
char *hostname;
u_int32 *result;
{
struct hostent *hp;
hp = gethostbyname(hostname);
if (!hp)
return -1;
bcopy(hp->h_addr, result, sizeof(*result));
return 0;
}
/*
* Lookup a netmask
* Return non-zero on failure.
*
* XXX - This is OK as a default, but to really make this automatic,
* we would need to get the subnet mask from the ether interface.
* If this is wrong, specify the correct value in the bootptab.
*/
int
lookup_netmask(addr, result)
u_int32 addr; /* both in network order */
u_int32 *result;
{
int32 m, a;
a = ntohl(addr);
m = 0;
if (IN_CLASSA(a))
m = IN_CLASSA_NET;
if (IN_CLASSB(a))
m = IN_CLASSB_NET;
if (IN_CLASSC(a))
m = IN_CLASSC_NET;
if (!m)
return -1;
*result = htonl(m);
return 0;
}
/*
* Local Variables:
* tab-width: 4
* c-indent-level: 4
* c-argdecl-indent: 4
* c-continued-statement-offset: 4
* c-continued-brace-offset: -4
* c-label-offset: -4
* c-brace-offset: 0
* End:
*/
|
