| /* main application for hnb-gw part of osmo-iuh */ |
| |
| /* (C) 2015 by Harald Welte <laforge@gnumonks.org> |
| * (C) 2016 by sysmocom s.f.m.c. GmbH <info@sysmocom.de> |
| * 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 <http://www.gnu.org/licenses/>. |
| * |
| */ |
| |
| #include <unistd.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <getopt.h> |
| #include <errno.h> |
| #include <signal.h> |
| #include <stdbool.h> |
| |
| #include <sys/types.h> |
| #include <sys/socket.h> |
| #include <netinet/in.h> |
| #include <netinet/sctp.h> |
| #include <arpa/inet.h> |
| |
| #include <osmocom/core/application.h> |
| #include <osmocom/core/talloc.h> |
| #include <osmocom/core/select.h> |
| #include <osmocom/core/logging.h> |
| #include <osmocom/core/socket.h> |
| #include <osmocom/core/msgb.h> |
| #include <osmocom/core/write_queue.h> |
| |
| #include <osmocom/vty/telnet_interface.h> |
| #include <osmocom/vty/logging.h> |
| |
| #include <osmocom/netif/stream.h> |
| |
| #include <osmocom/sigtran/sua.h> |
| #include <osmocom/sigtran/protocol/sua.h> |
| #include <osmocom/sigtran/sccp_sap.h> |
| |
| #include "hnbgw.h" |
| #include "hnbgw_hnbap.h" |
| #include "hnbgw_rua.h" |
| #include "hnbgw_cn.h" |
| #include "context_map.h" |
| |
| static const char * const osmo_hnbgw_copyright = |
| "OsmoHNBGW - Osmocom Home Node B Gateway implementation\r\n" |
| "Copyright (C) 2016 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>\r\n" |
| "Contributions by Daniel Willmann, Harald Welte, Neels Hofmeyr\r\n" |
| "License AGPLv3+: GNU AGPL version 3 or later <http://gnu.org/licenses/agpl-3.0.html>\r\n" |
| "This is free software: you are free to change and redistribute it.\r\n" |
| "There is NO WARRANTY, to the extent permitted by law.\r\n"; |
| |
| static void *tall_hnb_ctx; |
| void *talloc_asn1_ctx; |
| |
| static struct hnb_gw *g_hnb_gw; |
| |
| static int listen_fd_cb(struct osmo_fd *fd, unsigned int what); |
| |
| static struct hnb_gw *hnb_gw_create(void *ctx) |
| { |
| struct hnb_gw *gw = talloc_zero(ctx, struct hnb_gw); |
| |
| gw->config.iuh_listen_port = IUH_DEFAULT_SCTP_PORT; |
| |
| gw->next_ue_ctx_id = 23; |
| INIT_LLIST_HEAD(&gw->hnb_list); |
| INIT_LLIST_HEAD(&gw->ue_list); |
| INIT_LLIST_HEAD(&gw->cn_list); |
| |
| context_map_init(gw); |
| |
| return gw; |
| } |
| |
| struct ue_context *ue_context_by_id(struct hnb_gw *gw, uint32_t id) |
| { |
| struct ue_context *ue; |
| |
| llist_for_each_entry(ue, &gw->ue_list, list) { |
| if (ue->context_id == id) |
| return ue; |
| } |
| return NULL; |
| |
| } |
| |
| struct ue_context *ue_context_by_imsi(struct hnb_gw *gw, const char *imsi) |
| { |
| struct ue_context *ue; |
| |
| llist_for_each_entry(ue, &gw->ue_list, list) { |
| if (!strcmp(ue->imsi, imsi)) |
| return ue; |
| } |
| return NULL; |
| } |
| |
| void ue_context_free_by_hnb(struct hnb_gw *gw, const struct hnb_context *hnb) |
| { |
| struct ue_context *ue, *tmp; |
| |
| llist_for_each_entry_safe(ue, tmp, &gw->ue_list, list) { |
| if (ue->hnb == hnb) |
| ue_context_free(ue); |
| } |
| } |
| |
| static uint32_t get_next_ue_ctx_id(struct hnb_gw *gw) |
| { |
| uint32_t id; |
| |
| do { |
| id = gw->next_ue_ctx_id++; |
| } while (ue_context_by_id(gw, id)); |
| |
| return id; |
| } |
| |
| struct ue_context *ue_context_alloc(struct hnb_context *hnb, const char *imsi) |
| { |
| struct ue_context *ue; |
| |
| ue = talloc_zero(tall_hnb_ctx, struct ue_context); |
| if (!ue) |
| return NULL; |
| |
| ue->hnb = hnb; |
| strncpy(ue->imsi, imsi, sizeof(ue->imsi)); |
| ue->context_id = get_next_ue_ctx_id(hnb->gw); |
| llist_add_tail(&ue->list, &hnb->gw->ue_list); |
| |
| return ue; |
| } |
| |
| void ue_context_free(struct ue_context *ue) |
| { |
| llist_del(&ue->list); |
| talloc_free(ue); |
| } |
| static int hnb_close_cb(struct osmo_stream_srv *conn) |
| { |
| } |
| |
| static int hnb_read_cb(struct osmo_stream_srv *conn) |
| { |
| struct hnb_context *hnb = osmo_stream_srv_get_data(conn); |
| struct msgb *msg = msgb_alloc(IUH_MSGB_SIZE, "Iuh rx"); |
| int flags = 0; |
| int rc; |
| |
| if (!msg) |
| return -ENOMEM; |
| |
| /* we store a reference to the HomeNodeB in the msg->dest for the |
| * benefit of varoius downstream processing functions */ |
| msg->dst = hnb; |
| |
| rc = osmo_stream_srv_recv(conn, msg); |
| if (rc == -EAGAIN) { |
| /* Notification received */ |
| msgb_free(msg); |
| return 0; |
| } else if (rc < 0) { |
| LOGP(DMAIN, LOGL_ERROR, "Error during sctp_recvmsg()\n"); |
| /* FIXME: clean up after disappeared HNB */ |
| hnb_context_release(hnb); |
| goto out; |
| } else if (rc == 0) { |
| hnb_context_release(hnb); |
| rc = -1; |
| |
| goto out; |
| } else { |
| msgb_put(msg, rc); |
| } |
| |
| switch (msgb_sctp_ppid(msg)) { |
| case IUH_PPI_HNBAP: |
| hnb->hnbap_stream = msgb_sctp_stream(msg); |
| rc = hnbgw_hnbap_rx(hnb, msg); |
| break; |
| case IUH_PPI_RUA: |
| hnb->rua_stream = msgb_sctp_stream(msg); |
| rc = hnbgw_rua_rx(hnb, msg); |
| break; |
| case IUH_PPI_SABP: |
| case IUH_PPI_RNA: |
| case IUH_PPI_PUA: |
| LOGP(DMAIN, LOGL_ERROR, "Unimplemented SCTP PPID=%u received\n", |
| msgb_sctp_ppid(msg)); |
| rc = 0; |
| break; |
| default: |
| LOGP(DMAIN, LOGL_ERROR, "Unknown SCTP PPID=%u received\n", |
| msgb_sctp_ppid(msg)); |
| rc = 0; |
| break; |
| } |
| |
| out: |
| msgb_free(msg); |
| return rc; |
| } |
| |
| static int hnb_write_cb(struct osmo_fd *fd, struct msgb *msg) |
| { |
| struct hnb_context *ctx = fd->data; |
| struct sctp_sndrcvinfo sinfo = { |
| .sinfo_ppid = htonl(msgb_sctp_ppid(msg)), |
| .sinfo_stream = ctx->hnbap_stream, |
| }; |
| int rc; |
| |
| rc = sctp_send(fd->fd, msgb_data(msg), msgb_length(msg), |
| &sinfo, 0); |
| /* we don't need to msgb_free(), write_queue does this for us */ |
| return rc; |
| } |
| |
| struct hnb_context *hnb_context_alloc(struct hnb_gw *gw, struct osmo_stream_srv_link *link, int new_fd) |
| { |
| struct hnb_context *ctx; |
| |
| ctx = talloc_zero(tall_hnb_ctx, struct hnb_context); |
| if (!ctx) |
| return NULL; |
| INIT_LLIST_HEAD(&ctx->map_list); |
| |
| ctx->gw = gw; |
| ctx->conn = osmo_stream_srv_create(tall_hnb_ctx, link, new_fd, hnb_read_cb, hnb_close_cb, ctx); |
| if (!ctx->conn) { |
| LOGP(DMAIN, LOGL_INFO, "error while creating connection\n"); |
| talloc_free(ctx); |
| return NULL; |
| } |
| |
| llist_add_tail(&ctx->list, &gw->hnb_list); |
| return ctx; |
| } |
| |
| void hnb_context_release(struct hnb_context *ctx) |
| { |
| struct hnbgw_context_map *map, *map2; |
| |
| /* remove from the list of HNB contexts */ |
| llist_del(&ctx->list); |
| |
| /* deactivate all context maps */ |
| llist_for_each_entry_safe(map, map2, &ctx->map_list, hnb_list) { |
| /* remove it from list, as HNB context will soon be |
| * gone. Let's hope the second osmo_llist_del in the |
| * map garbage collector works fine? */ |
| llist_del(&map->hnb_list); |
| llist_del(&map->cn_list); |
| context_map_deactivate(map); |
| } |
| ue_context_free_by_hnb(ctx->gw, ctx); |
| osmo_stream_srv_destroy(ctx->conn); |
| |
| talloc_free(ctx); |
| } |
| |
| /*! call-back when the listen FD has something to read */ |
| static int accept_cb(struct osmo_stream_srv_link *srv, int fd) |
| { |
| struct hnb_gw *gw = osmo_stream_srv_link_get_data(srv); |
| struct hnb_context *ctx; |
| |
| ctx = hnb_context_alloc(gw, srv, fd); |
| if (!ctx) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| const char *hnbgw_get_iuh_bind_addr(struct hnb_gw *gw) |
| { |
| const char *addr = gw->config.iuh_bind_addr; |
| if (!addr) |
| addr = HNBGW_IUH_BIND_ADDR_DEFAULT; |
| return addr; |
| } |
| |
| static const struct log_info_cat log_cat[] = { |
| [DMAIN] = { |
| .name = "DMAIN", .loglevel = LOGL_DEBUG, .enabled = 1, |
| .color = "", |
| .description = "Main program", |
| }, |
| [DHNBAP] = { |
| .name = "DHNBAP", .loglevel = LOGL_DEBUG, .enabled = 1, |
| .color = "", |
| .description = "Home Node B Application Part", |
| }, |
| [DSUA] = { |
| .name = "DSUA", .loglevel = LOGL_DEBUG, .enabled = 1, |
| .color = "", |
| .description = "SCCP User Adaptation", |
| }, |
| [DRUA] = { |
| .name = "DRUA", .loglevel = LOGL_DEBUG, .enabled = 1, |
| .color = "", |
| .description = "RANAP User Adaptation", |
| }, |
| [DRANAP] = { |
| .name = "DRANAP", .loglevel = LOGL_DEBUG, .enabled = 1, |
| .color = "", |
| .description = "RAN Application Part", |
| }, |
| }; |
| |
| static const struct log_info hnbgw_log_info = { |
| .cat = log_cat, |
| .num_cat = ARRAY_SIZE(log_cat), |
| }; |
| |
| static struct vty_app_info vty_info = { |
| .name = "OsmoHNBGW", |
| .version = "0", |
| }; |
| |
| static struct { |
| int daemonize; |
| const char *config_file; |
| bool log_disable_color; |
| bool log_enable_timestamp; |
| int log_level; |
| const char *log_category_mask; |
| } hnbgw_cmdline_config = { |
| 0, |
| "osmo-hnbgw.cfg", |
| true, |
| false, |
| 0, |
| NULL, |
| }; |
| |
| static void print_usage() |
| { |
| printf("Usage: osmo-hnbgw\n"); |
| } |
| |
| static void print_help() |
| { |
| printf(" -h --help This text.\n"); |
| printf(" -d option --debug=DHNBAP:DSUA:DRUA:DRANAP:DMAIN Enable debugging.\n"); |
| printf(" -D --daemonize Fork the process into a background daemon.\n"); |
| printf(" -c --config-file filename The config file to use.\n"); |
| printf(" -s --disable-color\n"); |
| printf(" -T --timestamp Prefix every log line with a timestamp.\n"); |
| printf(" -V --version Print the version of OsmoHNBGW.\n"); |
| printf(" -e --log-level number Set a global loglevel.\n"); |
| } |
| |
| static void handle_options(int argc, char **argv) |
| { |
| while (1) { |
| int option_index = 0, c; |
| static struct option long_options[] = { |
| {"help", 0, 0, 'h'}, |
| {"debug", 1, 0, 'd'}, |
| {"daemonize", 0, 0, 'D'}, |
| {"config-file", 1, 0, 'c'}, |
| {"disable-color", 0, 0, 's'}, |
| {"timestamp", 0, 0, 'T'}, |
| {"version", 0, 0, 'V' }, |
| {"log-level", 1, 0, 'e'}, |
| {0, 0, 0, 0} |
| }; |
| |
| c = getopt_long(argc, argv, "hd:Dc:sTVe:", |
| long_options, &option_index); |
| if (c == -1) |
| break; |
| |
| switch (c) { |
| case 'h': |
| print_usage(); |
| print_help(); |
| exit(0); |
| case 's': |
| hnbgw_cmdline_config.log_disable_color = true; |
| break; |
| case 'd': |
| hnbgw_cmdline_config.log_category_mask = optarg; |
| break; |
| case 'D': |
| hnbgw_cmdline_config.daemonize = 1; |
| break; |
| case 'c': |
| hnbgw_cmdline_config.config_file = optarg; |
| break; |
| case 'T': |
| hnbgw_cmdline_config.log_enable_timestamp = true; |
| break; |
| case 'e': |
| hnbgw_cmdline_config.log_level = atoi(optarg); |
| break; |
| case 'V': |
| print_version(1); |
| exit(0); |
| break; |
| default: |
| /* catch unknown options *as well as* missing arguments. */ |
| fprintf(stderr, "Error in command line options. Exiting.\n"); |
| exit(-1); |
| break; |
| } |
| } |
| } |
| |
| |
| int main(int argc, char **argv) |
| { |
| struct osmo_sccp_user *sua_user; |
| struct osmo_sccp_link *sua_link; |
| struct osmo_stream_srv_link *srv; |
| int rc; |
| |
| tall_hnb_ctx = talloc_named_const(NULL, 0, "hnb_context"); |
| talloc_asn1_ctx = talloc_named_const(NULL, 0, "asn1_context"); |
| |
| g_hnb_gw = hnb_gw_create(tall_hnb_ctx); |
| g_hnb_gw->config.rnc_id = 23; |
| |
| rc = osmo_init_logging(&hnbgw_log_info); |
| if (rc < 0) |
| exit(1); |
| |
| vty_info.copyright = osmo_hnbgw_copyright; |
| vty_init(&vty_info); |
| |
| hnbgw_vty_init(g_hnb_gw, tall_hnb_ctx); |
| logging_vty_add_cmds(&hnbgw_log_info); |
| |
| /* Handle options after vty_init(), for --version */ |
| handle_options(argc, argv); |
| |
| rc = vty_read_config_file(hnbgw_cmdline_config.config_file, NULL); |
| if (rc < 0) { |
| LOGP(DMAIN, LOGL_FATAL, "Failed to parse the config file: '%s'\n", |
| hnbgw_cmdline_config.config_file); |
| return 1; |
| } |
| |
| /* |
| * cmdline options take precedence over config file, but if no options |
| * were passed we must not override the config file. |
| */ |
| if (hnbgw_cmdline_config.log_disable_color) |
| log_set_use_color(osmo_stderr_target, 0); |
| if (hnbgw_cmdline_config.log_category_mask) |
| log_parse_category_mask(osmo_stderr_target, |
| hnbgw_cmdline_config.log_category_mask); |
| if (hnbgw_cmdline_config.log_enable_timestamp) |
| log_set_print_timestamp(osmo_stderr_target, 1); |
| if (hnbgw_cmdline_config.log_level) |
| log_set_log_level(osmo_stderr_target, |
| hnbgw_cmdline_config.log_level); |
| |
| LOGP(DMAIN, LOGL_NOTICE, "VTY at %s %d\n", |
| vty_get_bind_addr(), 2323); |
| rc = telnet_init_dynif(NULL, g_hnb_gw, vty_get_bind_addr(), 2323); |
| if (rc < 0) { |
| perror("Error binding VTY port"); |
| exit(1); |
| } |
| |
| osmo_sua_set_log_area(DSUA); |
| ranap_set_log_area(DRANAP); |
| |
| g_hnb_gw->cnlink_cs = hnbgw_cnlink_init(g_hnb_gw, "127.0.0.1", SUA_PORT, 0); |
| g_hnb_gw->cnlink_ps = hnbgw_cnlink_init(g_hnb_gw, "127.0.0.2", SUA_PORT, 1); |
| |
| LOGP(DMAIN, LOGL_NOTICE, "Listening for Iuh at %s %d\n", |
| hnbgw_get_iuh_bind_addr(g_hnb_gw), |
| g_hnb_gw->config.iuh_listen_port); |
| srv = osmo_stream_srv_link_create(tall_hnb_ctx); |
| if (!srv) { |
| perror("cannot create server"); |
| exit(1); |
| } |
| osmo_stream_srv_link_set_data(srv, g_hnb_gw); |
| osmo_stream_srv_link_set_proto(srv, IPPROTO_SCTP); |
| osmo_stream_srv_link_set_addr(srv, hnbgw_get_iuh_bind_addr(g_hnb_gw)); |
| osmo_stream_srv_link_set_port(srv, g_hnb_gw->config.iuh_listen_port); |
| osmo_stream_srv_link_set_accept_cb(srv, accept_cb); |
| |
| if (osmo_stream_srv_link_open(srv) < 0) { |
| perror("Cannot open server"); |
| exit(1); |
| } |
| g_hnb_gw->iuh = srv; |
| |
| if (hnbgw_cmdline_config.daemonize) { |
| rc = osmo_daemonize(); |
| if (rc < 0) { |
| perror("Error during daemonize"); |
| exit(1); |
| } |
| } |
| |
| while (1) { |
| rc = osmo_select_main(0); |
| if (rc < 0) |
| exit(3); |
| } |
| |
| /* not reached */ |
| exit(0); |
| } |