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#include <stdlib.h>
#include <string.h>
#include <arpa/inet.h>
#include "ppp.h"
#include "ppp_ipcp.h"
#include "log.h"
#include "ipdb.h"
#include "events.h"
#include "memdebug.h"
static in_addr_t conf_dns1;
static in_addr_t conf_dns2;
static struct ipcp_option_t *dns1_init(struct ppp_ipcp_t *ipcp);
static struct ipcp_option_t *dns2_init(struct ppp_ipcp_t *ipcp);
static void dns_free(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt);
static int dns_send_conf_req(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt, uint8_t *ptr);
static int dns_send_conf_nak(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt, uint8_t *ptr);
static int dns_recv_conf_req(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt, uint8_t *ptr);
static void dns1_print(void (*print)(const char *fmt, ...), struct ipcp_option_t *, uint8_t *ptr);
static void dns2_print(void (*print)(const char *fmt, ...), struct ipcp_option_t *, uint8_t *ptr);
struct dns_option_t
{
struct ipcp_option_t opt;
in_addr_t addr;
};
static struct ipcp_option_handler_t dns1_opt_hnd =
{
.init = dns1_init,
.send_conf_req = dns_send_conf_req,
.send_conf_nak = dns_send_conf_nak,
.recv_conf_req = dns_recv_conf_req,
.free = dns_free,
.print = dns1_print,
};
static struct ipcp_option_handler_t dns2_opt_hnd =
{
.init = dns2_init,
.send_conf_req = dns_send_conf_req,
.send_conf_nak = dns_send_conf_nak,
.recv_conf_req = dns_recv_conf_req,
.free = dns_free,
.print = dns2_print,
};
static struct ipcp_option_t *dns1_init(struct ppp_ipcp_t *ipcp)
{
struct dns_option_t *dns_opt = _malloc(sizeof(*dns_opt));
memset(dns_opt, 0, sizeof(*dns_opt));
dns_opt->opt.id = CI_DNS1;
dns_opt->opt.len = 6;
dns_opt->addr = conf_dns1;
return &dns_opt->opt;
}
static struct ipcp_option_t *dns2_init(struct ppp_ipcp_t *ipcp)
{
struct dns_option_t *dns_opt = _malloc(sizeof(*dns_opt));
memset(dns_opt, 0, sizeof(*dns_opt));
dns_opt->opt.id = CI_DNS2;
dns_opt->opt.len = 6;
dns_opt->addr = conf_dns2;
return &dns_opt->opt;
}
static void dns_free(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt)
{
struct dns_option_t *dns_opt = container_of(opt, typeof(*dns_opt), opt);
_free(dns_opt);
}
static int dns_send_conf_req(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt, uint8_t *ptr)
{
return 0;
}
static int dns_send_conf_nak(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt, uint8_t *ptr)
{
struct dns_option_t *dns_opt = container_of(opt, typeof(*dns_opt), opt);
struct ipcp_opt32_t *opt32 = (struct ipcp_opt32_t *)ptr;
opt32->hdr.id = dns_opt->opt.id;
opt32->hdr.len = 6;
opt32->val = dns_opt->addr;
return 6;
}
static int dns_recv_conf_req(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt, uint8_t *ptr)
{
struct dns_option_t *dns_opt = container_of(opt, typeof(*dns_opt), opt);
struct ipcp_opt32_t *opt32 = (struct ipcp_opt32_t *)ptr;
if (opt32->hdr.len != 6)
return IPCP_OPT_REJ;
if (!dns_opt->addr) {
dns_opt->addr = opt32->val;
return IPCP_OPT_ACK;
}
if (dns_opt->addr == opt32->val)
return IPCP_OPT_ACK;
return IPCP_OPT_NAK;
}
static void dns1_print(void (*print)(const char *fmt, ...), struct ipcp_option_t *opt, uint8_t *ptr)
{
struct dns_option_t *dns_opt = container_of(opt, typeof(*dns_opt), opt);
struct ipcp_opt32_t *opt32 = (struct ipcp_opt32_t *)ptr;
struct in_addr in;
if (ptr)
in.s_addr = opt32->val;
else
in.s_addr = dns_opt->addr;
print("<dns1 %s>", inet_ntoa(in));
}
static void dns2_print(void (*print)(const char *fmt, ...), struct ipcp_option_t *opt, uint8_t *ptr)
{
struct dns_option_t *dns_opt = container_of(opt, typeof(*dns_opt), opt);
struct ipcp_opt32_t *opt32 = (struct ipcp_opt32_t *)ptr;
struct in_addr in;
if (ptr)
in.s_addr = opt32->val;
else
in.s_addr = dns_opt->addr;
print("<dns2 %s>", inet_ntoa(in));
}
static void ev_dns(struct ev_dns_t *ev)
{
struct dns_option_t *dns_opt;
struct ppp_t *ppp;
if (!ev->ses->ctrl->ppp)
return;
ppp = container_of(ev->ses, typeof(*ppp), ses);
dns_opt = container_of(ipcp_find_option(ppp, &dns1_opt_hnd), typeof(*dns_opt), opt);
dns_opt->addr = ev->dns1;
dns_opt = container_of(ipcp_find_option(ppp, &dns2_opt_hnd), typeof(*dns_opt), opt);
dns_opt->addr = ev->dns2;
}
static void load_config(void)
{
char *opt;
opt = conf_get_opt("dns", "dns1");
if (opt)
conf_dns1 = inet_addr(opt);
opt = conf_get_opt("dns", "dns2");
if (opt)
conf_dns2 = inet_addr(opt);
}
static void dns_opt_init()
{
ipcp_option_register(&dns1_opt_hnd);
ipcp_option_register(&dns2_opt_hnd);
load_config();
triton_event_register_handler(EV_CONFIG_RELOAD, (triton_event_func)load_config);
triton_event_register_handler(EV_DNS, (triton_event_func)ev_dns);
}
DEFINE_INIT(4, dns_opt_init);
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