/* (C) 2015 by Daniel Willmann * (C) 2021 by sysmocom - s.f.m.c. GmbH * Author: Pau Espin Pedrol * All Rights Reserved * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as published by * the Free Software Foundation; either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see . * */ #include "config.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static int get_logevel_by_sn_type(int sn_type) { switch (sn_type) { case SCTP_ADAPTATION_INDICATION: case SCTP_PEER_ADDR_CHANGE: #ifdef SCTP_AUTHENTICATION_INDICATION case SCTP_AUTHENTICATION_INDICATION: #endif #ifdef SCTP_SENDER_DRY_EVENT case SCTP_SENDER_DRY_EVENT: #endif return LOGL_INFO; case SCTP_ASSOC_CHANGE: return LOGL_NOTICE; case SCTP_SHUTDOWN_EVENT: case SCTP_PARTIAL_DELIVERY_EVENT: return LOGL_NOTICE; case SCTP_SEND_FAILED: case SCTP_REMOTE_ERROR: return LOGL_ERROR; default: return LOGL_NOTICE; } } static void log_sctp_notification(union sctp_notification *notif) { int log_level; LOGP(DSCTP, LOGL_INFO, "Iuh SCTP NOTIFICATION %u flags=0x%0x\n", notif->sn_header.sn_type, notif->sn_header.sn_flags); log_level = get_logevel_by_sn_type(notif->sn_header.sn_type); switch (notif->sn_header.sn_type) { case SCTP_ASSOC_CHANGE: LOGP(DSCTP, log_level, "Iuh SCTP_ASSOC_CHANGE: %s\n", osmo_sctp_assoc_chg_str(notif->sn_assoc_change.sac_state)); break; default: LOGP(DSCTP, log_level, "Iuh %s\n", osmo_sctp_sn_type_str(notif->sn_header.sn_type)); break; } } static int hnb_iuh_read_cb(struct osmo_stream_cli *conn) { struct osmo_fd *fd = osmo_stream_cli_get_ofd(conn); struct hnb *hnb = osmo_stream_cli_get_data(conn); struct sctp_sndrcvinfo sinfo; struct msgb *msg = msgb_alloc(IUH_MSGB_SIZE, "Iuh rx"); int flags = 0; int rc; if (!msg) return -ENOMEM; rc = sctp_recvmsg(fd->fd, msgb_data(msg), msgb_tailroom(msg), NULL, NULL, &sinfo, &flags); if (rc < 0) { LOGP(DSCTP, LOGL_ERROR, "Error during sctp_recvmsg()\n"); osmo_stream_cli_close(conn); hnb_shutdown(hnb, "sctp_recvmsg() error", false); goto free_ret; } else if (rc == 0) { LOGP(DSCTP, LOGL_INFO, "Connection to HNBGW closed\n"); osmo_stream_cli_close(conn); hnb_shutdown(hnb, "Iuh HNBGW conn closed", false); rc = -1; goto free_ret; } else { msgb_put(msg, rc); } if (flags & MSG_NOTIFICATION) { union sctp_notification *notif = (union sctp_notification *) msgb_data(msg); log_sctp_notification(notif); switch (notif->sn_header.sn_type) { case SCTP_SHUTDOWN_EVENT: osmo_fsm_inst_dispatch(hnb->shutdown_fi, HNB_SHUTDOWN_EV_START, NULL); hnb_shutdown(hnb, "Iuh HNBGW conn notification (SCTP_SHUTDOWN_EVENT)", false); break; default: break; } rc = 0; goto free_ret; } sinfo.sinfo_ppid = ntohl(sinfo.sinfo_ppid); switch (sinfo.sinfo_ppid) { case IUH_PPI_HNBAP: LOGP(DHNBAP, LOGL_INFO, "HNBAP message received\n"); rc = hnb_hnbap_rx(hnb, msg); break; case IUH_PPI_RUA: LOGP(DRUA, LOGL_INFO, "RUA message received\n"); rc = hnb_rua_rx(hnb, msg); break; case IUH_PPI_SABP: case IUH_PPI_RNA: case IUH_PPI_PUA: LOGP(DSCTP, LOGL_ERROR, "Unimplemented SCTP PPID=%u received\n", sinfo.sinfo_ppid); rc = 0; break; default: LOGP(DSCTP, LOGL_ERROR, "Unknown SCTP PPID=%u received\n", sinfo.sinfo_ppid); rc = 0; break; } free_ret: msgb_free(msg); return rc; } static int hnb_iuh_connect_cb(struct osmo_stream_cli *conn) { LOGP(DSCTP, LOGL_NOTICE, "Iuh connected to HNBGW\n"); struct hnb *hnb = osmo_stream_cli_get_data(conn); hnb_send_register_req(hnb); return 0; } void hnb_iuh_alloc(struct hnb *hnb) { struct osmo_stream_cli *cli; hnb->iuh.local_addr = talloc_strdup(hnb, "0.0.0.0"); hnb->iuh.local_port = 0; hnb->iuh.remote_addr = talloc_strdup(hnb, "127.0.0.1"); hnb->iuh.remote_port = IUH_DEFAULT_SCTP_PORT; cli = osmo_stream_cli_create(hnb); OSMO_ASSERT(cli); hnb->iuh.client = cli; osmo_stream_cli_set_name(cli, "Iuh"); osmo_stream_cli_set_nodelay(cli, true); osmo_stream_cli_set_proto(cli, IPPROTO_SCTP); osmo_stream_cli_set_reconnect_timeout(cli, 5); osmo_stream_cli_set_connect_cb(cli, hnb_iuh_connect_cb); osmo_stream_cli_set_read_cb(cli, hnb_iuh_read_cb); osmo_stream_cli_set_data(cli, hnb); } void hnb_iuh_free(struct hnb *hnb) { if (!hnb->iuh.client) return; osmo_stream_cli_destroy(hnb->iuh.client); hnb->iuh.client = NULL; } int hnb_iuh_connect(struct hnb *hnb) { int rc; LOGP(DSCTP, LOGL_INFO, "Iuh Connect: %s[:%u] => %s[:%u]\n", hnb->iuh.local_addr, hnb->iuh.local_port, hnb->iuh.remote_addr, hnb->iuh.remote_port); osmo_stream_cli_set_addrs(hnb->iuh.client, (const char **)&hnb->iuh.remote_addr, 1); osmo_stream_cli_set_port(hnb->iuh.client, hnb->iuh.remote_port); osmo_stream_cli_set_local_addrs(hnb->iuh.client, (const char **)&hnb->iuh.local_addr, 1); osmo_stream_cli_set_local_port(hnb->iuh.client, hnb->iuh.local_port); rc = osmo_stream_cli_open(hnb->iuh.client); if (rc < 0) { LOGP(DSCTP, LOGL_ERROR, "Unable to open stream client for Iuh %s[:%u] => %s[:%u]\n", hnb->iuh.local_addr, hnb->iuh.local_port, hnb->iuh.remote_addr, hnb->iuh.remote_port); /* we don't return error in here because osmo_stream_cli_open() will continue to retry (due to timeout being explicitly set with osmo_stream_cli_set_reconnect_timeout() above) to connect so the error is transient */ } return 0; } int hnb_iuh_send(struct hnb *hnb, struct msgb *msg) { osmo_stream_cli_send(hnb->iuh.client, msg); return 0; }