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
187
188
189
190
191
192
|
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include "linux_ppp.h"
#include "ppp.h"
#include "ppp_ipcp.h"
#include "log.h"
#include "ipdb.h"
#include "iprange.h"
#include "events.h"
#include "memdebug.h"
static struct ipcp_option_t *ipaddr_init(struct ppp_ipcp_t *ipcp);
static void ipaddr_free(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt);
static int ipaddr_send_conf_req(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt, uint8_t *ptr);
static int ipaddr_send_conf_nak(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt, uint8_t *ptr);
static int ipaddr_recv_conf_req(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt, uint8_t *ptr);
//static int ipaddr_recv_conf_ack(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt, uint8_t *ptr);
static void ipaddr_print(void (*print)(const char *fmt,...),struct ipcp_option_t*, uint8_t *ptr);
struct ipaddr_option_t
{
struct ipcp_option_t opt;
struct ipdb_item_t *ip;
int started:1;
};
static struct ipcp_option_handler_t ipaddr_opt_hnd=
{
.init=ipaddr_init,
.send_conf_req=ipaddr_send_conf_req,
.send_conf_nak=ipaddr_send_conf_nak,
.recv_conf_req=ipaddr_recv_conf_req,
.free=ipaddr_free,
.print=ipaddr_print,
};
static struct ipcp_option_t *ipaddr_init(struct ppp_ipcp_t *ipcp)
{
struct ipaddr_option_t *ipaddr_opt=_malloc(sizeof(*ipaddr_opt));
memset(ipaddr_opt,0,sizeof(*ipaddr_opt));
ipaddr_opt->opt.id=CI_ADDR;
ipaddr_opt->opt.len=6;
return &ipaddr_opt->opt;
}
static void ipaddr_free(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt)
{
struct ipaddr_option_t *ipaddr_opt=container_of(opt,typeof(*ipaddr_opt),opt);
if (ipaddr_opt->ip)
ipdb_put(ipcp->ppp, ipaddr_opt->ip);
_free(ipaddr_opt);
}
static int ipaddr_send_conf_req(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt, uint8_t *ptr)
{
struct ipaddr_option_t *ipaddr_opt=container_of(opt,typeof(*ipaddr_opt),opt);
struct ipcp_opt32_t *opt32=(struct ipcp_opt32_t*)ptr;
if (!ipaddr_opt->ip) {
ipaddr_opt->ip = ipdb_get(ipcp->ppp);
if (!ipaddr_opt->ip) {
log_ppp_warn("ppp:ipcp: no free IP address\n");
return -1;
}
}
if (iprange_tunnel_check(ipaddr_opt->ip->peer_addr)) {
log_ppp_warn("ppp:ipcp: to avoid kernel soft lockup requested IP cannot be assigned (%i.%i.%i.%i)\n",
ipaddr_opt->ip->peer_addr&0xff,
(ipaddr_opt->ip->peer_addr >> 8)&0xff,
(ipaddr_opt->ip->peer_addr >> 16)&0xff,
(ipaddr_opt->ip->peer_addr >> 24)&0xff);
return -1;
}
opt32->hdr.id=CI_ADDR;
opt32->hdr.len=6;
opt32->val=ipaddr_opt->ip->addr;
return 6;
}
static int ipaddr_send_conf_nak(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt, uint8_t *ptr)
{
struct ipaddr_option_t *ipaddr_opt=container_of(opt,typeof(*ipaddr_opt),opt);
struct ipcp_opt32_t *opt32=(struct ipcp_opt32_t*)ptr;
opt32->hdr.id=CI_ADDR;
opt32->hdr.len=6;
opt32->val=ipaddr_opt->ip->peer_addr;
return 6;
}
static int ipaddr_recv_conf_req(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt, uint8_t *ptr)
{
struct ipaddr_option_t *ipaddr_opt = container_of(opt,typeof(*ipaddr_opt), opt);
struct ipcp_opt32_t *opt32 = (struct ipcp_opt32_t*)ptr;
struct ifreq ifr;
struct sockaddr_in addr;
struct npioctl np;
if (opt32->hdr.len != 6)
return IPCP_OPT_REJ;
if (ipaddr_opt->ip->peer_addr == opt32->val)
goto ack;
/*if (!ipaddr_opt->peer_addr) {
ipaddr_opt->peer_addr = opt32->val;
goto ack;
}*/
return IPCP_OPT_NAK;
ack:
if (ipaddr_opt->started)
return IPCP_OPT_ACK;
ipaddr_opt->started = 1;
ipcp->ppp->ipaddr = ipaddr_opt->ip->addr;
ipcp->ppp->peer_ipaddr = ipaddr_opt->ip->peer_addr;
triton_event_fire(EV_PPP_ACCT_START, ipcp->ppp);
if (ipcp->ppp->stop_time)
return IPCP_OPT_ACK;
triton_event_fire(EV_PPP_PRE_UP, ipcp->ppp);
if (ipcp->ppp->stop_time)
return IPCP_OPT_ACK;
memset(&ifr, 0, sizeof(ifr));
memset(&addr, 0, sizeof(addr));
strcpy(ifr.ifr_name, ipcp->ppp->ifname);
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = ipaddr_opt->ip->addr;
memcpy(&ifr.ifr_addr,&addr,sizeof(addr));
if (ioctl(sock_fd, SIOCSIFADDR, &ifr))
log_ppp_error("ipcp: failed to set PA address: %s\n", strerror(errno));
addr.sin_addr.s_addr = ipaddr_opt->ip->peer_addr;
memcpy(&ifr.ifr_dstaddr,&addr,sizeof(addr));
if (ioctl(sock_fd, SIOCSIFDSTADDR, &ifr))
log_ppp_error("ipcp: failed to set remote PA address: %s\n", strerror(errno));
if (ioctl(sock_fd, SIOCGIFFLAGS, &ifr))
log_ppp_error("ipcp: failed to get interface flags: %s\n", strerror(errno));
ifr.ifr_flags |= IFF_UP | IFF_POINTOPOINT;
if (ioctl(sock_fd, SIOCSIFFLAGS, &ifr))
log_ppp_error("ipcp: failed to set interface flags: %s\n", strerror(errno));
np.protocol = PPP_IP;
np.mode = NPMODE_PASS;
if (ioctl(ipcp->ppp->unit_fd, PPPIOCSNPMODE, &np))
log_ppp_error("ipcp: failed to set NP mode: %s\n", strerror(errno));
return IPCP_OPT_ACK;
}
static void ipaddr_print(void (*print)(const char *fmt,...),struct ipcp_option_t *opt, uint8_t *ptr)
{
struct ipaddr_option_t *ipaddr_opt=container_of(opt,typeof(*ipaddr_opt),opt);
struct ipcp_opt32_t *opt32=(struct ipcp_opt32_t*)ptr;
struct in_addr in = { .s_addr = 0, };
if (ptr)
in.s_addr = opt32->val;
else if (ipaddr_opt->ip)
in.s_addr = ipaddr_opt->ip->addr;
print("<addr %s>",inet_ntoa(in));
}
static void __init ipaddr_opt_init()
{
ipcp_option_register(&ipaddr_opt_hnd);
}
|
