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
|
#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include "linux_ppp.h"
#include "triton.h"
#include "events.h"
#include "ppp.h"
#include "ipdb.h"
#include "log.h"
// from /usr/include/linux/ipv6.h
struct in6_ifreq {
struct in6_addr ifr6_addr;
__u32 ifr6_prefixlen;
int ifr6_ifindex;
};
static void devconf(struct ap_session *ses, const char *attr, const char *val)
{
int fd;
char fname[PATH_MAX];
sprintf(fname, "/proc/sys/net/ipv6/conf/%s/%s", ses->ifname, attr);
fd = open(fname, O_WRONLY);
if (!fd) {
log_ppp_error("failed to open '%s': %s\n", fname, strerror(errno));
return;
}
write(fd, val, strlen(val));
close(fd);
}
static void build_addr(struct ipv6db_addr_t *a, uint64_t intf_id, struct in6_addr *addr)
{
memcpy(addr, &a->addr, sizeof(*addr));
if (a->prefix_len <= 64)
*(uint64_t *)(addr->s6_addr + 8) = intf_id;
else
*(uint64_t *)(addr->s6_addr + 8) |= intf_id & ((1 << (128 - a->prefix_len)) - 1);
}
void ap_session_ifup(struct ap_session *ses)
{
struct ipv6db_addr_t *a;
struct ifreq ifr;
struct in6_ifreq ifr6;
struct npioctl np;
struct sockaddr_in addr;
struct ppp_t *ppp;
triton_event_fire(EV_SES_ACCT_START, ses);
if (ses->stop_time)
return;
triton_event_fire(EV_SES_PRE_UP, ses);
if (ses->stop_time)
return;
memset(&ifr, 0, sizeof(ifr));
strcpy(ifr.ifr_name, ses->ifname);
if (ses->ipv4) {
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = ses->ipv4->addr;
memcpy(&ifr.ifr_addr,&addr,sizeof(addr));
if (ioctl(sock_fd, SIOCSIFADDR, &ifr))
log_ppp_error("failed to set IPv4 address: %s\n", strerror(errno));
addr.sin_addr.s_addr = ses->ipv4->peer_addr;
memcpy(&ifr.ifr_dstaddr,&addr,sizeof(addr));
if (ioctl(sock_fd, SIOCSIFDSTADDR, &ifr))
log_ppp_error("failed to set peer IPv4 address: %s\n", strerror(errno));
}
if (ses->ipv6) {
devconf(ses, "accept_ra", "0");
devconf(ses, "autoconf", "0");
devconf(ses, "forwarding", "1");
memset(&ifr6, 0, sizeof(ifr6));
ifr6.ifr6_addr.s6_addr32[0] = htons(0xfe80);
*(uint64_t *)(ifr6.ifr6_addr.s6_addr + 8) = ses->ipv6->intf_id;
ifr6.ifr6_prefixlen = 64;
ifr6.ifr6_ifindex = ses->ifindex;
if (ioctl(sock6_fd, SIOCSIFADDR, &ifr6))
log_ppp_error("faild to set LL IPv6 address: %s\n", strerror(errno));
list_for_each_entry(a, &ses->ipv6->addr_list, entry) {
if (a->prefix_len == 128)
continue;
build_addr(a, ses->ipv6->intf_id, &ifr6.ifr6_addr);
ifr6.ifr6_prefixlen = a->prefix_len;
if (ioctl(sock6_fd, SIOCSIFADDR, &ifr6))
log_ppp_error("failed to add IPv6 address: %s\n", strerror(errno));
}
}
if (ioctl(sock_fd, SIOCGIFFLAGS, &ifr))
log_ppp_error("failed to get interface flags: %s\n", strerror(errno));
ifr.ifr_flags |= IFF_UP;
if (ioctl(sock_fd, SIOCSIFFLAGS, &ifr))
log_ppp_error("failed to set interface flags: %s\n", strerror(errno));
if (ses->ctrl->type != CTRL_TYPE_IPOE) {
ppp = container_of(ses, typeof(*ppp), ses);
if (ses->ipv4) {
np.protocol = PPP_IP;
np.mode = NPMODE_PASS;
if (ioctl(ppp->unit_fd, PPPIOCSNPMODE, &np))
log_ppp_error("failed to set NP (IPv4) mode: %s\n", strerror(errno));
}
if (ses->ipv6) {
np.protocol = PPP_IPV6;
np.mode = NPMODE_PASS;
if (ioctl(ppp->unit_fd, PPPIOCSNPMODE, &np))
log_ppp_error("failed to set NP (IPv6) mode: %s\n", strerror(errno));
}
}
ses->ctrl->started(ses);
triton_event_fire(EV_SES_STARTED, ses);
}
void __export ap_session_ifdown(struct ap_session *ses)
{
struct ifreq ifr;
struct sockaddr_in addr;
struct in6_ifreq ifr6;
struct ipv6db_addr_t *a;
memset(&ifr, 0, sizeof(ifr));
strcpy(ifr.ifr_name, ses->ifname);
ioctl(sock_fd, SIOCSIFFLAGS, &ifr);
if (ses->ipv4) {
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
memcpy(&ifr.ifr_addr,&addr,sizeof(addr));
ioctl(sock_fd, SIOCSIFADDR, &ifr);
}
if (ses->ipv6) {
memset(&ifr6, 0, sizeof(ifr6));
ifr6.ifr6_addr.s6_addr32[0] = htons(0xfe80);
*(uint64_t *)(ifr6.ifr6_addr.s6_addr + 8) = ses->ipv6->intf_id;
ifr6.ifr6_prefixlen = 64;
ifr6.ifr6_ifindex = ses->ifindex;
ioctl(sock6_fd, SIOCDIFADDR, &ifr6);
list_for_each_entry(a, &ses->ipv6->addr_list, entry) {
if (a->prefix_len == 128)
continue;
build_addr(a, ses->ipv6->intf_id, &ifr6.ifr6_addr);
ifr6.ifr6_prefixlen = a->prefix_len;
ioctl(sock6_fd, SIOCDIFADDR, &ifr6);
}
}
}
|
