static int ipa_client_read(struct ipa_client_conn *link)
{
struct osmo_fd *ofd = link->ofd;
struct msgb *msg;
int ret;
LOGIPA(link, LOGL_DEBUG, "message received\n");
ret = ipa_msg_recv_buffered(ofd->fd, &msg, &link->pending_msg);
if (ret <= 0) {
if (ret == -EAGAIN)
return 0;
else if (ret == -EPIPE || ret == -ECONNRESET)
LOGIPA(link, LOGL_ERROR, "lost connection with server\n");
else if (ret == 0)
LOGIPA(link, LOGL_ERROR, "connection closed with server\n");
ipa_client_conn_close(link);
if (link->updown_cb)
link->updown_cb(link, 0);
return -EBADF;
}
if (link->read_cb)
return link->read_cb(link, msg);
return 0;
}
int ipa_msg_recv(int fd, struct msgb **rmsg)
{
int rc = ipa_msg_recv_buffered(fd, rmsg, NULL);
if (rc < 0) {
errno = -rc;
rc = -1;
}
return rc;
}
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 ipa_server_conn_read(struct ipa_server_conn *conn)
{
struct osmo_fd *ofd = &conn->ofd;
struct msgb *msg;
int ret;
LOGIPA(conn, LOGL_DEBUG, "message received\n");
ret = ipa_msg_recv_buffered(ofd->fd, &msg, &conn->pending_msg);
if (ret <= 0) {
if (ret == -EAGAIN)
return 0;
else if (ret == -EPIPE || ret == -ECONNRESET)
LOGIPA(conn, LOGL_ERROR, "lost connection with server\n");
else if (ret == 0)
LOGIPA(conn, LOGL_ERROR, "connection closed with server\n");
ipa_server_conn_destroy(conn);
return -EBADF;
}
if (conn->cb)
return conn->cb(conn, msg);
return 0;
}
