static int ussd_read_cb(struct osmo_fd *bfd)
{
struct bsc_nat_ussd_con *conn = bfd->data;
struct msgb *msg = NULL;
struct ipaccess_head *hh;
int ret;
ret = ipa_msg_recv_buffered(bfd->fd, &msg, &conn->pending_msg);
if (ret <= 0) {
if (ret == -EAGAIN)
return 0;
LOGP(DNAT, LOGL_ERROR, "USSD Connection was lost.\n");
bsc_nat_ussd_destroy(conn);
return -1;
}
LOGP(DNAT, LOGL_NOTICE, "MSG from USSD: %s proto: %d\n",
osmo_hexdump(msg->data, msg->len), msg->l2h[0]);
hh = (struct ipaccess_head *) msg->data;
if (hh->proto == IPAC_PROTO_IPACCESS) {
if (msg->l2h[0] == IPAC_MSGT_ID_RESP) {
struct tlv_parsed tvp;
int ret;
ret = ipa_ccm_idtag_parse(&tvp,
(unsigned char *) msg->l2h + 2,
msgb_l2len(msg) - 2);
if (ret < 0) {
LOGP(DNAT, LOGL_ERROR, "ignoring IPA response "
"message with malformed TLVs\n");
msgb_free(msg);
return ret;
}
if (TLVP_PRESENT(&tvp, IPAC_IDTAG_UNITNAME))
ussd_auth_con(&tvp, conn);
} else if (msg->l2h[0] == IPAC_MSGT_PING) {
LOGP(DNAT, LOGL_DEBUG, "Got USSD ping request.\n");
ussd_pong(conn);
} else {
LOGP(DNAT, LOGL_NOTICE, "Got unknown IPACCESS message 0x%02x.\n", msg->l2h[0]);
}
msgb_free(msg);
} else if (hh->proto == IPAC_PROTO_SCCP) {
forward_sccp(conn->nat, msg);
} else {
msgb_free(msg);
}
return 0;
}
static int ussd_read_cb(struct osmo_fd *bfd)
{
int error;
struct bsc_nat_ussd_con *conn = bfd->data;
struct msgb *msg = ipaccess_read_msg(bfd, &error);
struct ipaccess_head *hh;
if (!msg) {
LOGP(DNAT, LOGL_ERROR, "USSD Connection was lost.\n");
bsc_nat_ussd_destroy(conn);
return -1;
}
LOGP(DNAT, LOGL_NOTICE, "MSG from USSD: %s proto: %d\n",
osmo_hexdump(msg->data, msg->len), msg->l2h[0]);
hh = (struct ipaccess_head *) msg->data;
if (hh->proto == IPAC_PROTO_IPACCESS) {
if (msg->l2h[0] == IPAC_MSGT_ID_RESP) {
struct tlv_parsed tvp;
int ret;
ret = ipaccess_idtag_parse(&tvp,
(unsigned char *) msg->l2h + 2,
msgb_l2len(msg) - 2);
if (ret < 0) {
LOGP(DNAT, LOGL_ERROR, "ignoring IPA response "
"message with malformed TLVs\n");
return ret;
}
if (TLVP_PRESENT(&tvp, IPAC_IDTAG_UNITNAME))
ussd_auth_con(&tvp, conn);
}
msgb_free(msg);
} else if (hh->proto == IPAC_PROTO_SCCP) {
forward_sccp(conn->nat, msg);
} else {
msgb_free(msg);
}
return 0;
}
