209 lines
4.1 KiB
C
209 lines
4.1 KiB
C
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <openbsc/select.h>
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#include <openbsc/timer.h>
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#include <openbsc/ipaccess.h>
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#include <openbsc/gsm_data.h>
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static const char *idtag_names[] = {
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[IPAC_IDTAG_SERNR] = "Serial Number",
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[IPAC_IDTAG_UNITNAME] = "Unit Name",
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[IPAC_IDTAG_LOCATION1] = "Location 1",
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[IPAC_IDTAG_LOCATION2] = "Location 2",
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[IPAC_IDTAG_EQUIPVERS] = "Equipment Version",
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[IPAC_IDTAG_SWVERSION] = "Software Version",
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[IPAC_IDTAG_IPADDR] = "IP Address",
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[IPAC_IDTAG_MACADDR] = "MAC Address",
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[IPAC_IDTAG_UNIT] = "Unit ID",
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};
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static const char *ipac_idtag_name(int tag)
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{
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if (tag >= ARRAY_SIZE(idtag_names))
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return "unknown";
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return idtag_names[tag];
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}
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static int udp_sock(const char *ifname)
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{
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int fd, rc, bc = 1;
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struct sockaddr_in sa;
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fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
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if (fd < 0)
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return fd;
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if (ifname) {
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rc = setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, ifname,
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strlen(ifname));
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if (rc < 0)
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goto err;
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}
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sa.sin_family = AF_INET;
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sa.sin_port = htons(3006);
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sa.sin_addr.s_addr = INADDR_ANY;
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rc = bind(fd, (struct sockaddr *)&sa, sizeof(sa));
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if (rc < 0)
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goto err;
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rc = setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &bc, sizeof(bc));
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if (rc < 0)
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goto err;
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#if 0
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/* we cannot bind, since the response packets don't come from
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* the broadcast address */
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sa.sin_family = AF_INET;
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sa.sin_port = htons(3006);
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inet_aton("255.255.255.255", &sa.sin_addr);
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rc = connect(fd, (struct sockaddr *)&sa, sizeof(sa));
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if (rc < 0)
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goto err;
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#endif
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return fd;
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err:
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close(fd);
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return rc;
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}
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const unsigned char find_pkt[] = { 0x00, 0x0b+8, IPAC_PROTO_IPACCESS, 0x00,
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IPAC_MSGT_ID_GET,
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0x01, IPAC_IDTAG_MACADDR,
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0x01, IPAC_IDTAG_IPADDR,
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0x01, IPAC_IDTAG_UNIT,
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0x01, IPAC_IDTAG_LOCATION1,
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0x01, IPAC_IDTAG_LOCATION2,
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0x01, IPAC_IDTAG_EQUIPVERS,
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0x01, IPAC_IDTAG_SWVERSION,
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0x01, IPAC_IDTAG_UNITNAME,
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0x01, IPAC_IDTAG_SERNR,
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};
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static int bcast_find(int fd)
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{
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struct sockaddr_in sa;
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sa.sin_family = AF_INET;
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sa.sin_port = htons(3006);
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inet_aton("255.255.255.255", &sa.sin_addr);
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return sendto(fd, find_pkt, sizeof(find_pkt), 0, (struct sockaddr *) &sa, sizeof(sa));
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}
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static int parse_response(unsigned char *buf, int len)
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{
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u_int8_t t_len;
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u_int8_t t_tag;
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u_int8_t *cur = buf;
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while (cur < buf + len) {
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t_len = *cur++;
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t_tag = *cur++;
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printf("%s='%s' ", ipac_idtag_name(t_tag), cur);
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cur += t_len;
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}
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printf("\n");
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return 0;
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}
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static int read_response(int fd)
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{
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unsigned char buf[255];
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struct sockaddr_in sa;
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int len;
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socklen_t sa_len = sizeof(sa);
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len = recvfrom(fd, buf, sizeof(buf), 0, (struct sockaddr *)&sa, &sa_len);
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if (len < 0)
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return len;
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/* 2 bytes length, 1 byte protocol (0xfe) */
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if (buf[2] != 0xfe)
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return 0;
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if (buf[4] != IPAC_MSGT_ID_RESP)
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return 0;
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return parse_response(buf+6, len-6);
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}
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static int bfd_cb(struct bsc_fd *bfd, unsigned int flags)
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{
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if (flags & BSC_FD_READ)
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return read_response(bfd->fd);
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if (flags & BSC_FD_WRITE) {
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bfd->when &= ~BSC_FD_WRITE;
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return bcast_find(bfd->fd);
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}
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return 0;
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}
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static struct timer_list timer;
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static void timer_cb(void *_data)
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{
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struct bsc_fd *bfd = _data;
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bfd->when |= BSC_FD_WRITE;
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bsc_schedule_timer(&timer, 5, 0);
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}
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int main(int argc, char **argv)
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{
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struct bsc_fd bfd;
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char *ifname;
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int rc;
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printf("ipaccess-find (C) 2009 by Harald Welte\n");
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printf("This is FREE SOFTWARE with ABSOLUTELY NO WARRANTY\n\n");
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if (argc < 2) {
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fprintf(stdout, "you might need to specify the outgoing\n"
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" network interface, e.g. ``%s eth0''\n", argv[0]);
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}
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ifname = argv[1];
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bfd.cb = bfd_cb;
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bfd.when = BSC_FD_READ | BSC_FD_WRITE;
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bfd.fd = udp_sock(ifname);
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if (bfd.fd < 0) {
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perror("Cannot create local socket for broadcast udp");
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exit(1);
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}
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bsc_register_fd(&bfd);
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timer.cb = timer_cb;
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timer.data = &bfd;
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bsc_schedule_timer(&timer, 5, 0);
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printf("Trying to find ip.access BTS by broadcast UDP...\n");
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while (1) {
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rc = bsc_select_main(0);
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if (rc < 0)
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exit(3);
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}
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exit(0);
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}
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