mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-29 00:32:03 +02:00
ead: add support for instance ids to prevent interference from packet reception on multiple interfaces
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@13905 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd
parent
15f9be1011
commit
04553c0968
@ -62,6 +62,7 @@ static struct t_num *A, B;
|
||||
static struct t_preconf *tcp;
|
||||
static int auth_type = EAD_AUTH_DEFAULT;
|
||||
static int timeout = EAD_TIMEOUT;
|
||||
static uint16_t sid = 0;
|
||||
|
||||
static void
|
||||
set_nonblock(int enable)
|
||||
@ -157,6 +158,7 @@ handle_pong(void)
|
||||
auth_type = ntohs(pong->auth_type);
|
||||
if (nid == 0xffff)
|
||||
printf("%04x: %s\n", ntohs(msg->nid), pong->name);
|
||||
sid = msg->sid;
|
||||
return true;
|
||||
}
|
||||
|
||||
@ -320,7 +322,7 @@ int main(int argc, char **argv)
|
||||
int ch;
|
||||
|
||||
msg->magic = htonl(EAD_MAGIC);
|
||||
msg->tid = 0;
|
||||
msg->sid = 0;
|
||||
|
||||
memset(&local, 0, sizeof(local));
|
||||
memset(&remote, 0, sizeof(remote));
|
||||
|
||||
@ -65,10 +65,20 @@
|
||||
#define DEBUG(n, format, ...) do {} while(0)
|
||||
#endif
|
||||
|
||||
struct ead_instance {
|
||||
struct list_head list;
|
||||
char ifname[16];
|
||||
int pid;
|
||||
char id;
|
||||
#ifdef linux
|
||||
char bridge[16];
|
||||
bool br_check;
|
||||
#endif
|
||||
};
|
||||
|
||||
static char ethmac[6] = "\x00\x13\x37\x00\x00\x00"; /* last 3 bytes will be randomized */
|
||||
static pcap_t *pcap_fp = NULL;
|
||||
static pcap_t *pcap_fp_rx = NULL;
|
||||
static const char *ifname = DEFAULT_IFNAME;
|
||||
static char pktbuf_b[PCAP_MRU];
|
||||
static struct ead_packet *pktbuf = (struct ead_packet *)pktbuf_b;
|
||||
static u16_t nid = 0xffff; /* node id */
|
||||
@ -85,20 +95,7 @@ static unsigned char pw_saltbuf[MAXSALTLEN];
|
||||
static struct list_head instances;
|
||||
static const char *dev_name = DEFAULT_DEVNAME;
|
||||
static bool nonfork = false;
|
||||
|
||||
#ifdef linux
|
||||
static const char *brname = NULL;
|
||||
#endif
|
||||
|
||||
struct ead_instance {
|
||||
struct list_head list;
|
||||
char name[16];
|
||||
int pid;
|
||||
#ifdef linux
|
||||
char bridge[16];
|
||||
bool br_check;
|
||||
#endif
|
||||
};
|
||||
static struct ead_instance *instance = NULL;
|
||||
|
||||
static struct t_pwent tpe = {
|
||||
.name = username,
|
||||
@ -113,6 +110,20 @@ static struct t_server *ts = NULL;
|
||||
static struct t_num A, *B = NULL;
|
||||
unsigned char *skey;
|
||||
|
||||
static void
|
||||
get_random_bytes(void *ptr, int len)
|
||||
{
|
||||
int fd;
|
||||
|
||||
fd = open("/dev/urandom", O_RDONLY);
|
||||
if (fd < 0) {
|
||||
perror("open");
|
||||
exit(1);
|
||||
}
|
||||
read(fd, ptr, len);
|
||||
close(fd);
|
||||
}
|
||||
|
||||
static bool
|
||||
prepare_password(void)
|
||||
{
|
||||
@ -539,6 +550,11 @@ parse_message(struct ead_packet *pkt, int len)
|
||||
(state != type))
|
||||
return;
|
||||
|
||||
if ((type != EAD_TYPE_PING) &&
|
||||
((ntohs(pkt->msg.sid) & EAD_INSTANCE_MASK) >>
|
||||
EAD_INSTANCE_SHIFT) != instance->id)
|
||||
return;
|
||||
|
||||
switch(type) {
|
||||
case EAD_TYPE_PING:
|
||||
handler = handle_ping;
|
||||
@ -574,6 +590,7 @@ parse_message(struct ead_packet *pkt, int len)
|
||||
pktbuf->msg.magic = htonl(EAD_MAGIC);
|
||||
pktbuf->msg.type = htonl(type + 1);
|
||||
pktbuf->msg.nid = htons(nid);
|
||||
pktbuf->msg.sid = pkt->msg.sid;
|
||||
pktbuf->msg.len = 0;
|
||||
|
||||
if (handler(pkt, len, &nstate)) {
|
||||
@ -630,16 +647,16 @@ ead_pcap_reopen(bool first)
|
||||
|
||||
pcap_fp_rx = NULL;
|
||||
do {
|
||||
pcap_fp = pcap_open_live(ifname, PCAP_MRU, 1, PCAP_TIMEOUT, errbuf);
|
||||
pcap_fp = pcap_open_live(instance->ifname, PCAP_MRU, 1, PCAP_TIMEOUT, errbuf);
|
||||
#ifdef linux
|
||||
if (brname)
|
||||
pcap_fp_rx = pcap_open_live(brname, PCAP_MRU, 1, PCAP_TIMEOUT, errbuf);
|
||||
if (instance->bridge[0])
|
||||
pcap_fp_rx = pcap_open_live(instance->bridge, PCAP_MRU, 1, PCAP_TIMEOUT, errbuf);
|
||||
#endif
|
||||
if (!pcap_fp_rx)
|
||||
pcap_fp_rx = pcap_fp;
|
||||
pcap_setfilter(pcap_fp_rx, &pktfilter);
|
||||
if (first && !pcap_fp) {
|
||||
DEBUG(1, "WARNING: unable to open interface '%s'\n", ifname);
|
||||
DEBUG(1, "WARNING: unable to open interface '%s'\n", instance->ifname);
|
||||
first = false;
|
||||
}
|
||||
if (!pcap_fp)
|
||||
@ -712,12 +729,8 @@ start_server(struct ead_instance *i)
|
||||
}
|
||||
}
|
||||
|
||||
instance = i;
|
||||
signal(SIGCHLD, instance_handle_sigchld);
|
||||
ifname = i->name;
|
||||
#ifdef linux
|
||||
if (i->bridge[0])
|
||||
brname = i->bridge;
|
||||
#endif
|
||||
ead_pcap_reopen(true);
|
||||
ead_pktloop();
|
||||
pcap_close(pcap_fp);
|
||||
@ -779,7 +792,7 @@ check_bridge_port(const char *br, const char *port, void *arg)
|
||||
list_for_each(p, &instances) {
|
||||
in = list_entry(p, struct ead_instance, list);
|
||||
|
||||
if (strcmp(in->name, port) != 0)
|
||||
if (strcmp(in->ifname, port) != 0)
|
||||
continue;
|
||||
|
||||
in->br_check = true;
|
||||
@ -787,7 +800,7 @@ check_bridge_port(const char *br, const char *port, void *arg)
|
||||
break;
|
||||
|
||||
strncpy(in->bridge, br, sizeof(in->bridge));
|
||||
DEBUG(2, "assigning port %s to bridge %s\n", in->name, in->bridge);
|
||||
DEBUG(2, "assigning port %s to bridge %s\n", in->ifname, in->bridge);
|
||||
stop_server(in, false);
|
||||
}
|
||||
return 0;
|
||||
@ -817,7 +830,7 @@ check_all_interfaces(void)
|
||||
if (in->br_check) {
|
||||
in->br_check = false;
|
||||
} else if (in->bridge[0]) {
|
||||
DEBUG(2, "removing port %s from bridge %s\n", in->name, in->bridge);
|
||||
DEBUG(2, "removing port %s from bridge %s\n", in->ifname, in->bridge);
|
||||
in->bridge[0] = 0;
|
||||
stop_server(in, false);
|
||||
}
|
||||
@ -830,10 +843,10 @@ int main(int argc, char **argv)
|
||||
{
|
||||
struct ead_instance *in;
|
||||
struct timeval tv;
|
||||
int fd, ch;
|
||||
const char *pidfile = NULL;
|
||||
bool background = false;
|
||||
int n_iface = 0;
|
||||
int fd, ch;
|
||||
|
||||
if (argc == 1)
|
||||
return usage(argv[0]);
|
||||
@ -853,9 +866,9 @@ int main(int argc, char **argv)
|
||||
in = malloc(sizeof(struct ead_instance));
|
||||
memset(in, 0, sizeof(struct ead_instance));
|
||||
INIT_LIST_HEAD(&in->list);
|
||||
strncpy(in->name, optarg, sizeof(in->name) - 1);
|
||||
strncpy(in->ifname, optarg, sizeof(in->ifname) - 1);
|
||||
list_add(&in->list, &instances);
|
||||
n_iface++;
|
||||
in->id = n_iface++;
|
||||
break;
|
||||
case 'D':
|
||||
dev_name = optarg;
|
||||
@ -902,13 +915,7 @@ int main(int argc, char **argv)
|
||||
}
|
||||
|
||||
/* randomize the mac address */
|
||||
fd = open("/dev/urandom", O_RDONLY);
|
||||
if (fd < 0) {
|
||||
perror("open");
|
||||
exit(1);
|
||||
}
|
||||
read(fd, ethmac + 3, 3);
|
||||
close(fd);
|
||||
get_random_bytes(ethmac + 3, 3);
|
||||
nid = *(((u16_t *) ethmac) + 2);
|
||||
|
||||
start_servers(false);
|
||||
|
||||
@ -114,12 +114,16 @@ struct ead_msg_encrypted {
|
||||
#define EAD_DATA(_msg, _type) (&((_msg)->data[0]._type))
|
||||
#define EAD_ENC_DATA(_msg, _type) (&((_msg)->data[0].enc.data[0]._type))
|
||||
|
||||
/* for ead_msg::sid */
|
||||
#define EAD_INSTANCE_MASK 0xf000
|
||||
#define EAD_INSTANCE_SHIFT 12
|
||||
|
||||
struct ead_msg {
|
||||
uint32_t magic;
|
||||
uint32_t len;
|
||||
uint32_t type;
|
||||
uint16_t nid; /* node id */
|
||||
uint16_t tid; /* transaction id */
|
||||
uint16_t sid; /* session id */
|
||||
uint32_t ip; /* source ip for responses from the server */
|
||||
union {
|
||||
struct ead_msg_pong pong;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user