int translate(char *mesh_iface, int argc, char **argv)
{
struct ether_addr *dst_mac = NULL;
struct bat_host *bat_host;
int ret = EXIT_FAILURE;
char *dst_string, *mac_string;
if (argc <= 1) {
fprintf(stderr, "Error - destination not specified\n");
translate_usage();
return EXIT_FAILURE;
}
dst_string = argv[1];
bat_hosts_init(0);
bat_host = bat_hosts_find_by_name(dst_string);
if (bat_host)
dst_mac = &bat_host->mac_addr;
if (!dst_mac) {
dst_mac = resolve_mac(dst_string);
if (!dst_mac) {
fprintf(stderr, "Error - mac address of the ping destination could not be resolved and is not a bat-host name: %s\n", dst_string);
goto out;
}
}
dst_mac = translate_mac(mesh_iface, dst_mac);
if (dst_mac) {
mac_string = ether_ntoa_long(dst_mac);
printf("%s\n", mac_string);
ret = EXIT_SUCCESS;
} else {
ret = EXIT_NOSUCCESS;
}
out:
bat_hosts_free();
return ret;
}
int ping(char *mesh_iface, int argc, char **argv)
{
struct icmp_packet_rr icmp_packet_out, icmp_packet_in;
struct timeval tv;
struct ether_addr *dst_mac = NULL, *rr_mac = NULL;
struct bat_host *bat_host, *rr_host;
ssize_t read_len;
fd_set read_socket;
int ret = EXIT_FAILURE, ping_fd = 0, res, optchar, found_args = 1;
int loop_count = -1, loop_interval = 0, timeout = 1, rr = 0, i;
unsigned int seq_counter = 0, packets_out = 0, packets_in = 0, packets_loss;
char *dst_string, *mac_string, *rr_string;
double time_delta;
float min = 0.0, max = 0.0, avg = 0.0, mdev = 0.0;
uint8_t last_rr_cur = 0, last_rr[BAT_RR_LEN][ETH_ALEN];
size_t packet_len;
char *debugfs_mnt;
char icmp_socket[MAX_PATH+1];
while ((optchar = getopt(argc, argv, "hc:i:t:R")) != -1) {
switch (optchar) {
case 'c':
loop_count = strtol(optarg, NULL , 10);
if (loop_count < 1)
loop_count = -1;
found_args += ((*((char*)(optarg - 1)) == optchar ) ? 1 : 2);
break;
case 'h':
ping_usage();
return EXIT_SUCCESS;
case 'i':
loop_interval = strtol(optarg, NULL , 10);
if (loop_interval < 1)
loop_interval = 1;
found_args += ((*((char*)(optarg - 1)) == optchar ) ? 1 : 2);
break;
case 't':
timeout = strtol(optarg, NULL , 10);
if (timeout < 1)
timeout = 1;
found_args += ((*((char*)(optarg - 1)) == optchar ) ? 1 : 2);
break;
case 'R':
rr = 1;
found_args++;
break;
default:
ping_usage();
return EXIT_FAILURE;
}
}
if (argc <= found_args) {
printf("Error - target mac address or bat-host name not specified\n");
ping_usage();
return EXIT_FAILURE;
}
dst_string = argv[found_args];
bat_hosts_init(0);
bat_host = bat_hosts_find_by_name(dst_string);
if (bat_host)
dst_mac = &bat_host->mac_addr;
if (!dst_mac) {
dst_mac = ether_aton(dst_string);
if (!dst_mac) {
printf("Error - the ping destination is not a mac address or bat-host name: %s\n", dst_string);
goto out;
}
}
mac_string = ether_ntoa_long(dst_mac);
signal(SIGINT, sig_handler);
signal(SIGTERM, sig_handler);
debugfs_mnt = debugfs_mount(NULL);
if (!debugfs_mnt) {
printf("Error - can't mount or find debugfs\n");
goto out;
}
debugfs_make_path(SOCKET_PATH_FMT, mesh_iface, icmp_socket, sizeof(icmp_socket));
ping_fd = open(icmp_socket, O_RDWR);
if (ping_fd < 0) {
printf("Error - can't open a connection to the batman adv kernel module via the socket '%s': %s\n",
icmp_socket, strerror(errno));
printf("Check whether the module is loaded and active.\n");
goto out;
}
packet_len = sizeof(struct icmp_packet);
memcpy(&icmp_packet_out.dst, dst_mac, ETH_ALEN);
icmp_packet_out.packet_type = BAT_ICMP;
icmp_packet_out.version = COMPAT_VERSION;
icmp_packet_out.msg_type = ECHO_REQUEST;
icmp_packet_out.ttl = 50;
icmp_packet_out.seqno = 0;
if (rr) {
packet_len = sizeof(struct icmp_packet_rr);
icmp_packet_out.rr_cur = 1;
memset(&icmp_packet_out.rr, 0, BAT_RR_LEN * ETH_ALEN);
memset(last_rr, 0, BAT_RR_LEN * ETH_ALEN);
}
printf("PING %s (%s) %zu(%zu) bytes of data\n", dst_string, mac_string,
packet_len, packet_len + 28);
while (!is_aborted) {
tv.tv_sec = timeout;
tv.tv_usec = 0;
if (loop_count == 0)
break;
if (loop_count > 0)
loop_count--;
icmp_packet_out.seqno = htons(++seq_counter);
if (write(ping_fd, (char *)&icmp_packet_out, packet_len) < 0) {
printf("Error - can't write to batman adv kernel file '%s': %s\n", icmp_socket, strerror(errno));
goto sleep;
}
start_timer();
FD_ZERO(&read_socket);
FD_SET(ping_fd, &read_socket);
res = select(ping_fd + 1, &read_socket, NULL, NULL, &tv);
if (is_aborted)
break;
packets_out++;
if (res == 0) {
printf("Reply from host %s timed out\n", dst_string);
goto sleep;
}
if (res < 0)
goto sleep;
read_len = read(ping_fd, (char *)&icmp_packet_in, packet_len);
if (read_len < 0) {
printf("Error - can't read from batman adv kernel file '%s': %s\n", icmp_socket, strerror(errno));
goto sleep;
}
if ((size_t)read_len < packet_len) {
printf("Warning - dropping received packet as it is smaller than expected (%zu): %zd\n",
packet_len, read_len);
goto sleep;
}
switch (icmp_packet_in.msg_type) {
case ECHO_REPLY:
time_delta = end_timer();
printf("%zd bytes from %s icmp_seq=%hu ttl=%d time=%.2f ms",
read_len, dst_string, ntohs(icmp_packet_in.seqno),
icmp_packet_in.ttl, time_delta);
if (read_len == sizeof(struct icmp_packet_rr)) {
if (last_rr_cur == icmp_packet_in.rr_cur
&& !memcmp(last_rr, icmp_packet_in.rr, BAT_RR_LEN * ETH_ALEN)) {
printf("\t(same route)");
} else {
printf("\nRR: ");
for (i = 0; i < BAT_RR_LEN
&& i < icmp_packet_in.rr_cur; i++) {
rr_mac = (struct ether_addr *)&icmp_packet_in.rr[i];
rr_host = bat_hosts_find_by_mac((char *)rr_mac);
if (rr_host)
rr_string = rr_host->name;
else
rr_string = ether_ntoa_long(rr_mac);
printf("\t%s\n", rr_string);
if (memcmp(rr_mac, dst_mac, ETH_ALEN) == 0)
printf("\t%s\n", rr_string);
}
last_rr_cur = icmp_packet_in.rr_cur;
memcpy(last_rr, icmp_packet_in.rr, BAT_RR_LEN * ETH_ALEN);
}
}
printf("\n");
if ((time_delta < min) || (min == 0.0))
min = time_delta;
if (time_delta > max)
max = time_delta;
avg += time_delta;
mdev += time_delta * time_delta;
packets_in++;
break;
case DESTINATION_UNREACHABLE:
printf("From %s: Destination Host Unreachable (icmp_seq %hu)\n", dst_string, ntohs(icmp_packet_in.seqno));
break;
case TTL_EXCEEDED:
printf("From %s: Time to live exceeded (icmp_seq %hu)\n", dst_string, ntohs(icmp_packet_in.seqno));
break;
case PARAMETER_PROBLEM:
printf("Error - the batman adv kernel module version (%d) differs from ours (%d)\n",
icmp_packet_in.ttl, COMPAT_VERSION);
printf("Please make sure to compatible versions!\n");
goto out;
default:
printf("Unknown message type %d len %zd received\n", icmp_packet_in.msg_type, read_len);
break;
}
sleep:
if (loop_interval > 0)
sleep(loop_interval);
else if ((tv.tv_sec != 0) || (tv.tv_usec != 0))
select(0, NULL, NULL, NULL, &tv);
}
if (packets_out == 0)
packets_loss = 0;
else
packets_loss = ((packets_out - packets_in) * 100) / packets_out;
if (packets_in) {
avg /= packets_in;
mdev /= packets_in;
mdev = mdev - avg * avg;
if (mdev > 0.0)
mdev = sqrt(mdev);
else
mdev = 0.0;
} else {
avg = 0.0;
mdev = 0.0;
}
printf("--- %s ping statistics ---\n", dst_string);
printf("%u packets transmitted, %u received, %u%% packet loss\n",
packets_out, packets_in, packets_loss);
printf("rtt min/avg/max/mdev = %.3f/%.3f/%.3f/%.3f ms\n",
min, avg, max, mdev);
ret = EXIT_SUCCESS;
out:
bat_hosts_free();
if (ping_fd)
close(ping_fd);
return ret;
}
static void parse_hosts_file(struct hashtable_t **hash, const char path[], int read_opt)
{
FILE *fd;
char *line_ptr = NULL;
char name[HOST_NAME_MAX_LEN], mac_str[18];
struct ether_addr *mac_addr;
struct bat_host *bat_host;
struct hashtable_t *swaphash;
size_t len = 0;
name[0] = mac_str[0] = '\0';
fd = fopen(path, "r");
if (!fd)
return;
while (getline(&line_ptr, &len, fd) != -1) {
/* ignore empty lines and comments */
if ((line_ptr[0] == '\n') || (line_ptr[0] == '#'))
continue;
if (sscanf(line_ptr, "%17[^ \t]%49s\n", mac_str, name) != 2) {
if (read_opt & USE_BAT_HOSTS)
fprintf(stderr, "Warning - unrecognized bat-host definition: %s", line_ptr);
continue;
}
mac_addr = ether_aton(mac_str);
if (!mac_addr) {
if (read_opt & USE_BAT_HOSTS)
fprintf(stderr, "Warning - invalid mac address in '%s' detected: %s\n", path, mac_str);
continue;
}
bat_host = bat_hosts_find_by_mac((char *)mac_addr);
/* mac entry already exists - we found a new name for it */
if (bat_host) {
/* if the mac addresses and the names are the same we can safely ignore the entry */
if (strcmp(bat_host->name, name) == 0)
continue;
if (read_opt & USE_BAT_HOSTS)
fprintf(stderr, "Warning - mac already known (changing name from '%s' to '%s'): %s\n",
bat_host->name, name, mac_str);
strncpy(bat_host->name, name, HOST_NAME_MAX_LEN - 1);
continue;
}
bat_host = bat_hosts_find_by_name(name);
/* name entry already exists - we found a new mac address for it */
if (bat_host) {
if (read_opt & USE_BAT_HOSTS)
fprintf(stderr, "Warning - name already known (changing mac from '%s' to '%s'): %s\n",
ether_ntoa(&bat_host->mac_addr), mac_str, name);
hash_remove(*hash, bat_host);
free(bat_host);
}
bat_host = malloc(sizeof(struct bat_host));
if (!bat_host) {
if (read_opt & USE_BAT_HOSTS)
fprintf(stderr, "Error - could not allocate memory: %s\n", strerror(errno));
goto out;
}
memcpy(&bat_host->mac_addr, mac_addr, sizeof(struct ether_addr));
strncpy(bat_host->name, name, HOST_NAME_MAX_LEN - 1);
hash_add(*hash, bat_host);
if ((*hash)->elements * 4 > (*hash)->size) {
swaphash = hash_resize((*hash), (*hash)->size * 2);
if (swaphash)
*hash = swaphash;
else if (read_opt & USE_BAT_HOSTS)
fprintf(stderr, "Warning - couldn't resize bat hosts hash table\n");
}
}
out:
if (fd)
fclose(fd);
if (line_ptr)
free(line_ptr);
return;
}
