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
|
/*
* route-win32.c
*
* Copyright (c) 2002 Dug Song <dugsong@monkey.org>
*
* $Id$
*/
#include "config.h"
#include <ws2tcpip.h>
#include <iphlpapi.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include "dumbnet.h"
struct route_handle {
MIB_IPFORWARDTABLE *ipftable;
};
route_t *
route_open(void)
{
return (calloc(1, sizeof(route_t)));
}
int
route_add(route_t *route, const struct route_entry *entry)
{
MIB_IPFORWARDROW ipfrow;
struct addr net;
memset(&ipfrow, 0, sizeof(ipfrow));
if (GetBestInterface(entry->route_gw.addr_ip,
&ipfrow.dwForwardIfIndex) != NO_ERROR)
return (-1);
if (addr_net(&entry->route_dst, &net) < 0 ||
net.addr_type != ADDR_TYPE_IP)
return (-1);
ipfrow.dwForwardDest = net.addr_ip;
addr_btom(entry->route_dst.addr_bits,
&ipfrow.dwForwardMask, IP_ADDR_LEN);
ipfrow.dwForwardNextHop = entry->route_gw.addr_ip;
ipfrow.dwForwardType = 4; /* XXX - next hop != final dest */
ipfrow.dwForwardProto = 3; /* XXX - MIB_PROTO_NETMGMT */
if (CreateIpForwardEntry(&ipfrow) != NO_ERROR)
return (-1);
return (0);
}
int
route_delete(route_t *route, const struct route_entry *entry)
{
MIB_IPFORWARDROW ipfrow;
DWORD mask;
if (entry->route_dst.addr_type != ADDR_TYPE_IP ||
GetBestRoute(entry->route_dst.addr_ip,
IP_ADDR_ANY, &ipfrow) != NO_ERROR)
return (-1);
addr_btom(entry->route_dst.addr_bits, &mask, IP_ADDR_LEN);
if (ipfrow.dwForwardDest != entry->route_dst.addr_ip ||
ipfrow.dwForwardMask != mask) {
errno = ENXIO;
SetLastError(ERROR_NO_DATA);
return (-1);
}
if (DeleteIpForwardEntry(&ipfrow) != NO_ERROR)
return (-1);
return (0);
}
int
route_get(route_t *route, struct route_entry *entry)
{
MIB_IPFORWARDROW ipfrow;
DWORD mask;
if (entry->route_dst.addr_type != ADDR_TYPE_IP ||
GetBestRoute(entry->route_dst.addr_ip,
IP_ADDR_ANY, &ipfrow) != NO_ERROR)
return (-1);
if (ipfrow.dwForwardProto == 2 && /* XXX - MIB_IPPROTO_LOCAL */
(ipfrow.dwForwardNextHop|IP_CLASSA_NET) !=
(IP_ADDR_LOOPBACK|IP_CLASSA_NET) &&
!IP_LOCAL_GROUP(ipfrow.dwForwardNextHop)) {
errno = ENXIO;
SetLastError(ERROR_NO_DATA);
return (-1);
}
addr_btom(entry->route_dst.addr_bits, &mask, IP_ADDR_LEN);
entry->route_gw.addr_type = ADDR_TYPE_IP;
entry->route_gw.addr_bits = IP_ADDR_BITS;
entry->route_gw.addr_ip = ipfrow.dwForwardNextHop;
return (0);
}
int
route_loop(route_t *r, route_handler callback, void *arg)
{
struct route_entry entry;
ULONG len;
int i, ret;
for (len = sizeof(r->ipftable[0]); ; ) {
if (r->ipftable)
free(r->ipftable);
r->ipftable = malloc(len);
ret = GetIpForwardTable(r->ipftable, &len, FALSE);
if (ret == NO_ERROR)
break;
else if (ret != ERROR_INSUFFICIENT_BUFFER)
return (-1);
}
entry.route_dst.addr_type = ADDR_TYPE_IP;
entry.route_dst.addr_bits = IP_ADDR_BITS;
entry.route_gw.addr_type = ADDR_TYPE_IP;
entry.route_gw.addr_bits = IP_ADDR_BITS;
for (i = 0; i < (int)r->ipftable->dwNumEntries; i++) {
entry.route_dst.addr_ip = r->ipftable->table[i].dwForwardDest;
addr_mtob(&r->ipftable->table[i].dwForwardMask, IP_ADDR_LEN,
&entry.route_dst.addr_bits);
entry.route_gw.addr_ip =
r->ipftable->table[i].dwForwardNextHop;
if ((ret = (*callback)(&entry, arg)) != 0)
return (ret);
}
return (0);
}
route_t *
route_close(route_t *r)
{
if (r != NULL) {
if (r->ipftable != NULL)
free(r->ipftable);
free(r);
}
return (NULL);
}
|