| /*! \file osmo-mslookup-client.c |
| * Distributed GSM: find the location of subscribers, for example by multicast DNS, |
| * to obtain HLR, SIP or SMPP server addresses (or arbitrary service names). |
| */ |
| /* |
| * (C) 2019 by sysmocom s.f.m.c. GmbH <info@sysmocom.de> |
| * (C) 2019 by Neels Hofmeyr <neels@hofmeyr.de> |
| * |
| * All Rights Reserved |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 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 General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include <stdio.h> |
| #include <unistd.h> |
| #include <getopt.h> |
| #include <errno.h> |
| #include <talloc.h> |
| #include <sys/un.h> |
| |
| #include <osmocom/core/application.h> |
| #include <osmocom/core/logging.h> |
| #include <osmocom/core/select.h> |
| #include <osmocom/core/socket.h> |
| #include <osmocom/mslookup/mslookup_client.h> |
| #include <osmocom/mslookup/mslookup_client_mdns.h> |
| #include <osmocom/mslookup/mdns_sock.h> |
| #include <osmocom/mslookup/mdns.h> |
| |
| #define CSV_HEADERS "query\tresult\tlast\tage\tv4_ip\tv4_port\tv6_ip\tv6_port" |
| |
| static void print_version(void) |
| { |
| printf("osmo-mslookup-client version %s\n", PACKAGE_VERSION); |
| printf("\n" |
| "Copyright (C) 2019 by sysmocom - s.f.m.c. GmbH\n" |
| "Copyright (C) 2019 by Neels Hofmeyr <neels@hofmeyr.de>\n" |
| "This program is free software; you can redistribute it and/or modify\n" |
| "it under the terms of the GNU General Public License as published by\n" |
| "the Free Software Foundation; either version 2 of the License, or\n" |
| "(at your option) any later version.\n" |
| "\n"); |
| } |
| |
| static void print_help() |
| { |
| print_version(); |
| printf( |
| "Standalone mslookup client for Distributed GSM\n" |
| "\n" |
| "Receiving mslookup results means listening for responses on a socket. Often,\n" |
| "integration (e.g. FreeSwitch dialplan.py) makes it hard to select() on a socket\n" |
| "to read responses, because that interferes with the main program (e.g.\n" |
| "FreeSwitch's dialplan.py seems to be integrated with an own select() main loop\n" |
| "that interferes with osmo_select_main(), or an smpp.py uses\n" |
| "smpplib.client.listen() as main loop, etc.).\n" |
| "\n" |
| "This program provides a trivial solution, by outsourcing the mslookup main loop\n" |
| "to a separate process. Communication is done via cmdline arg and stdout pipe or\n" |
| "a (blocking) unix domain socket, results are returned in CSV or JSON format.\n" |
| "\n" |
| "This can be done one-shot, i.e. exit as soon as the response has been\n" |
| "determined, or in daemon form, i.e. continuously listen for requests and return\n" |
| "responses.\n" |
| "\n" |
| "About running a local daemon: it is unintuitive to connect to a socket to solve\n" |
| "a problem of reading from a socket -- it seems like just more of the same\n" |
| "problem. The reasons why the daemon is in fact useful are:\n" |
| "- The osmo-mslookup-client daemon will return only those results matching\n" |
| " requests issued on that socket connection.\n" |
| "- A program can simply blockingly recv() from the osmo-mslookup-client socket\n" |
| " instead of needing to run osmo_select_main() so that libosmo-mslookup is able\n" |
| " to asynchronously receive responses from remote servers.\n" |
| "- Only one long-lived multicast socket needs to be opened instead of a new\n" |
| " socket for each request.\n" |
| "\n" |
| "Output is in CSV or json, see --format. The default is tab-separated CSV\n" |
| "with these columns:\n" |
| CSV_HEADERS "\n" |
| "\n" |
| "One-shot operation example:\n" |
| "$ osmo-mslookup-client 1000-@sip.voice.12345.msisdn -f json\n" |
| "{\"query\": \"sip.voice.12345.msisdn\", \"result\": \"result\", \"last\": true, \"age\": 5, \"v4\": [\"1.2.3.7\", \"23\"]}\n" |
| "$\n" |
| "\n" |
| "Daemon operation example:\n" |
| "$ osmo-mslookup-client -s /tmp/mslookup -d\n" |
| "(and a client program then connects to /tmp/mslookup, find an implementation\n" |
| "example below)\n" |
| "\n" |
| "Integrating with calling programs can be done by:\n" |
| "- call osmo-mslookup-client with the query string as argument.\n" |
| " It will open a multicast DNS socket, send out a query and wait for the\n" |
| " matching response. It will print the result on stdout and exit.\n" |
| " This method launches a new process for every mslookup query,\n" |
| " and creates a short-lived multicast listener for each invocation.\n" |
| " This is fine for low activity, but does not scale well.\n" |
| "\n" |
| "- invoke osmo-mslookup-client --socket /tmp/mslookup -d.\n" |
| " Individual queries can be sent by connecting to that unix domain socket,\n" |
| " blockingly reading the response when it arrives and disconnecting.\n" |
| " This way only one process keeps one multicast listener open.\n" |
| " Callers can connect to this socket without spawning processes.\n" |
| " This is recommended for scale.\n" |
| "\n" |
| "Python example clients for {CSV,JSON}x{cmdline,socket} can be found here:\n" |
| "http://git.osmocom.org/osmo-hlr/tree/contrib/dgsm/osmo-mslookup-pipe.py\n" |
| "http://git.osmocom.org/osmo-hlr/tree/contrib/dgsm/osmo-mslookup-socket.py\n" |
| "\n" |
| "\n" |
| "Options:\n" |
| "\n" |
| "[[delay-][timeout]@]service.number.id\n" |
| " A service query string with optional individual timeout.\n" |
| " The same format is also used on a daemon socket, if any.\n" |
| " The timeout consists of the min-delay and the timeout numbers,\n" |
| " corresponding to the --min-delay and --timeout options, in milliseconds.\n" |
| " These options apply if a query string lacks own numbers.\n" |
| " Examples:\n" |
| " gsup.hlr.1234567.imsi Use cmdline timeout settings\n" |
| " 5000@gsup.hlr.1234567.imsi Return N results for 5 seconds\n" |
| " 1000-5000@sip.voice.123.msisdn Same, but silent for first second\n" |
| " 10000-@smpp.sms.567.msisdn Return 1 result after 10 seconds\n" |
| "\n" |
| "--format -f csv (default)\n" |
| " Format result lines in CSV format.\n" |
| "--no-csv-headers -H\n" |
| " If the format is 'csv', by default, the first output line prints the\n" |
| " CSV headers used for CSV output format. This option disables these CSV\n" |
| " headers.\n" |
| "\n" |
| "--format -f json\n" |
| " Format result lines in json instead of semicolon separated, like:\n" |
| " {\"query\": \"sip.voice.12345.msisdn\", \"result\": \"ok\", \"v4\": [\"10.9.8.7\", \"5060\"]}\n" |
| "\n" |
| "--daemon -d\n" |
| " Keep running after a request has been serviced\n" |
| "\n" |
| "--mdns-ip -m " OSMO_MSLOOKUP_MDNS_IP4 " -m " OSMO_MSLOOKUP_MDNS_IP6 "\n" |
| "--mdns-port -M " OSMO_STRINGIFY_VAL(OSMO_MSLOOKUP_MDNS_PORT) "\n" |
| " Set multicast IP address / port to send mDNS requests and listen for\n" |
| " mDNS reponses\n" |
| "--mdns-domain-suffix -D " OSMO_MDNS_DOMAIN_SUFFIX_DEFAULT "\n" |
| " Append this suffix to each mDNS query's domain to avoid colliding with the\n" |
| " top-level domains administrated by IANA.\n" |
| "\n" |
| "--min-delay -t 1000 (in milliseconds)\n" |
| " Set minimum delay to wait before returning any results.\n" |
| " When this timeout has elapsed, the best current result is returned,\n" |
| " if any is available.\n" |
| " Responses arriving after the min-delay has elapsed which have a younger\n" |
| " age than previous results are returned immediately.\n" |
| " Note: When a response with age of zero comes in, the result is returned\n" |
| " immediately and the request is discarded: non-daemon mode exits, daemon\n" |
| " mode ignores later results.\n" |
| "\n" |
| "--timeout -T 1000 (in milliseconds)\n" |
| " Set timeout after which to stop listening for responses.\n" |
| " If this is smaller than -t, the value from -t will be used for -T as well.\n" |
| " Note: When a response with age of zero comes in, the result is returned\n" |
| " immediately and the request is discarded: non-daemon mode exits, daemon\n" |
| " mode ignores later results.\n" |
| "\n" |
| "--socket -s /path/to/unix-domain-socket\n" |
| " Listen to requests from and write responses to a UNIX domain socket.\n" |
| "\n" |
| "--send -S <query> <age> <ip1> <port1> <ip2> <port2>\n" |
| " Do not query, but send an mslookup result. This is useful only for\n" |
| " testing. Examples:\n" |
| " --send foo.123.msisdn 300 23.42.17.11 1234\n" |
| " --send foo.123.msisdn 300 2323:4242:1717:1111::42 1234\n" |
| " --send foo.123.msisdn 300 23.42.17.11 1234 2323:4242:1717:1111::42 1234\n" |
| "\n" |
| "--quiet -q\n" |
| " Do not print errors to stderr, do not log to stderr.\n" |
| "\n" |
| "--help -h\n" |
| " This help\n" |
| ); |
| } |
| |
| enum result_format { |
| FORMAT_CSV = 0, |
| FORMAT_JSON, |
| }; |
| |
| static struct { |
| bool daemon; |
| struct osmo_sockaddr_str mdns_addr; |
| uint32_t min_delay; |
| uint32_t timeout; |
| const char *socket_path; |
| const char *format_str; |
| const char *mdns_domain_suffix; |
| bool csv_headers; |
| bool send; |
| bool quiet; |
| } cmdline_opts = { |
| .mdns_addr = { .af=AF_INET, .ip=OSMO_MSLOOKUP_MDNS_IP4, .port=OSMO_MSLOOKUP_MDNS_PORT }, |
| .min_delay = 1000, |
| .timeout = 1000, |
| .csv_headers = true, |
| .mdns_domain_suffix = OSMO_MDNS_DOMAIN_SUFFIX_DEFAULT, |
| }; |
| |
| #define print_error(fmt, args...) do { \ |
| if (!cmdline_opts.quiet) \ |
| fprintf(stderr, fmt, ##args); \ |
| } while (0) |
| |
| char g_buf[1024]; |
| |
| long long int parse_int(long long int minval, long long int maxval, const char *arg, int *rc) |
| { |
| long long int val; |
| char *endptr; |
| if (rc) |
| *rc = -1; |
| if (!arg) |
| return -1; |
| errno = 0; |
| val = strtoll(arg, &endptr, 10); |
| if (errno || val < minval || val > maxval || *endptr) |
| return -1; |
| if (rc) |
| *rc = 0; |
| return val; |
| } |
| |
| int cb_doing_nothing(struct osmo_fd *fd, unsigned int what) |
| { |
| return 0; |
| } |
| |
| /* --send: Just send a response, for manual testing. */ |
| int do_send(int argc, char ** argv) |
| { |
| /* parse args <query> <age> <v4-ip> <v4-port> <v6-ip> <v6-port> */ |
| #define ARG(NR) ((argc > NR)? argv[NR] : NULL) |
| const char *query_str = ARG(0); |
| const char *age_str = ARG(1); |
| const char *ip_strs[2][2] = { |
| { ARG(2), ARG(3) }, |
| { ARG(4), ARG(5) }, |
| }; |
| struct osmo_mslookup_query q = {}; |
| struct osmo_mslookup_result r = { .rc = OSMO_MSLOOKUP_RC_RESULT }; |
| int i; |
| int rc; |
| void *ctx = talloc_named_const(NULL, 0, __func__); |
| struct osmo_mdns_sock *sock; |
| |
| if (!query_str) { |
| print_error("--send needs a query string like foo.123456.imsi\n"); |
| return 1; |
| } |
| if (osmo_mslookup_query_init_from_domain_str(&q, query_str)) { |
| print_error("Invalid query string '%s', need a query string like foo.123456.imsi\n", |
| query_str); |
| return 1; |
| } |
| |
| if (!age_str) { |
| print_error("--send needs an age\n"); |
| return 1; |
| } |
| r.age = parse_int(0, UINT32_MAX, age_str, &rc); |
| if (rc) { |
| print_error("invalid age\n"); |
| return 1; |
| } |
| |
| for (i = 0; i < 2; i++) { |
| struct osmo_sockaddr_str addr; |
| uint16_t port; |
| if (!ip_strs[i][0]) |
| continue; |
| port = parse_int(1, 65535, ip_strs[i][1] ? : "2342", &rc); |
| if (rc) { |
| print_error("invalid port: %s\n", ip_strs[i][1] ? : "NULL"); |
| return 1; |
| } |
| if (osmo_sockaddr_str_from_str(&addr, ip_strs[i][0], port)) { |
| print_error("invalid IP addr: %s\n", ip_strs[i][0]); |
| return 1; |
| } |
| if (addr.af == AF_INET) |
| r.host_v4 = addr; |
| else |
| r.host_v6 = addr; |
| } |
| |
| printf("Sending mDNS to " OSMO_SOCKADDR_STR_FMT ": %s\n", OSMO_SOCKADDR_STR_FMT_ARGS(&cmdline_opts.mdns_addr), |
| osmo_mslookup_result_name_c(ctx, &q, &r)); |
| |
| rc = 1; |
| sock = osmo_mdns_sock_init(ctx, cmdline_opts.mdns_addr.ip, cmdline_opts.mdns_addr.port, |
| cb_doing_nothing, NULL, 0); |
| if (!sock) { |
| print_error("unable to open mDNS socket\n"); |
| goto exit_cleanup; |
| } |
| |
| struct msgb *msg = osmo_mdns_result_encode(ctx, 0, &q, &r, cmdline_opts.mdns_domain_suffix); |
| if (!msg) { |
| print_error("unable to encode mDNS response\n"); |
| goto exit_cleanup_sock; |
| } |
| |
| if (osmo_mdns_sock_send(sock, msg)) { |
| print_error("unable to send mDNS message\n"); |
| goto exit_cleanup_sock; |
| } |
| |
| rc = 0; |
| exit_cleanup_sock: |
| osmo_mdns_sock_cleanup(sock); |
| exit_cleanup: |
| talloc_free(ctx); |
| return rc; |
| } |
| |
| static struct { |
| void *ctx; |
| unsigned int requests_handled; |
| struct osmo_fd socket_ofd; |
| struct osmo_mslookup_client *mslookup_client; |
| struct llist_head queries; |
| struct llist_head socket_clients; |
| enum result_format format; |
| } globals = { |
| .queries = LLIST_HEAD_INIT(globals.queries), |
| .socket_clients = LLIST_HEAD_INIT(globals.socket_clients), |
| }; |
| |
| typedef void (*formatter_t)(char *buf, size_t buflen, const char *query_str, const struct osmo_mslookup_result *r); |
| |
| void formatter_csv(char *buf, size_t buflen, const char *query_str, const struct osmo_mslookup_result *r) |
| { |
| struct osmo_strbuf sb = { .buf=buf, .len=buflen }; |
| OSMO_STRBUF_PRINTF(sb, "%s", query_str); |
| |
| if (!r) |
| OSMO_STRBUF_PRINTF(sb, "\tERROR\t\t\t\t\t\t"); |
| else { |
| OSMO_STRBUF_PRINTF(sb, "\t%s", osmo_mslookup_result_code_name(r->rc)); |
| OSMO_STRBUF_PRINTF(sb, "\t%s", r->last ? "last" : "not-last"); |
| OSMO_STRBUF_PRINTF(sb, "\t%u", r->age); |
| switch (r->rc) { |
| case OSMO_MSLOOKUP_RC_RESULT: |
| if (osmo_sockaddr_str_is_nonzero(&r->host_v4)) |
| OSMO_STRBUF_PRINTF(sb, "\t%s\t%u", r->host_v4.ip, r->host_v4.port); |
| else |
| OSMO_STRBUF_PRINTF(sb, "\t\t"); |
| if (osmo_sockaddr_str_is_nonzero(&r->host_v6)) |
| OSMO_STRBUF_PRINTF(sb, "\t%s\t%u", r->host_v6.ip, r->host_v6.port); |
| else |
| OSMO_STRBUF_PRINTF(sb, "\t\t"); |
| break; |
| default: |
| OSMO_STRBUF_PRINTF(sb, "\t\t\t\t\t"); |
| break; |
| } |
| } |
| } |
| |
| void formatter_json(char *buf, size_t buflen, const char *query_str, const struct osmo_mslookup_result *r) |
| { |
| struct osmo_strbuf sb = { .buf=buf, .len=buflen }; |
| OSMO_STRBUF_PRINTF(sb, "{\"query\": \"%s\"", query_str); |
| |
| if (!r) |
| OSMO_STRBUF_PRINTF(sb, ", \"result\": \"ERROR\""); |
| else { |
| OSMO_STRBUF_PRINTF(sb, ", \"result\": \"%s\"", osmo_mslookup_result_code_name(r->rc)); |
| OSMO_STRBUF_PRINTF(sb, ", \"last\": %s", r->last ? "true" : "false"); |
| OSMO_STRBUF_PRINTF(sb, ", \"age\": %u", r->age); |
| if (r->rc == OSMO_MSLOOKUP_RC_RESULT) { |
| if (osmo_sockaddr_str_is_nonzero(&r->host_v4)) |
| OSMO_STRBUF_PRINTF(sb, ", \"v4\": [\"%s\", \"%u\"]", r->host_v4.ip, r->host_v4.port); |
| if (osmo_sockaddr_str_is_nonzero(&r->host_v6)) |
| OSMO_STRBUF_PRINTF(sb, ", \"v6\": [\"%s\", \"%u\"]", r->host_v6.ip, r->host_v6.port); |
| } |
| } |
| OSMO_STRBUF_PRINTF(sb, "}"); |
| } |
| |
| formatter_t formatters[] = { |
| [FORMAT_CSV] = formatter_csv, |
| [FORMAT_JSON] = formatter_json, |
| }; |
| |
| void respond_str_stdout(const char *str) { |
| fprintf(stdout, "%s\n", str); |
| fflush(stdout); |
| } |
| |
| void start_query_str(const char *query_str); |
| void start_query_strs(char **query_strs, size_t query_strs_len); |
| |
| struct socket_client { |
| struct llist_head entry; |
| struct osmo_fd ofd; |
| char query_str[1024]; |
| }; |
| |
| static void socket_client_close(struct socket_client *c) |
| { |
| struct osmo_fd *ofd = &c->ofd; |
| |
| close(ofd->fd); |
| ofd->fd = -1; |
| osmo_fd_unregister(ofd); |
| |
| llist_del(&c->entry); |
| talloc_free(c); |
| } |
| |
| void socket_client_respond_result(struct socket_client *c, const char *response) |
| { |
| write(c->ofd.fd, response, strlen(response)); |
| } |
| |
| static int socket_read_cb(struct osmo_fd *ofd) |
| { |
| struct socket_client *c = ofd->data; |
| int rc; |
| char rxbuf[1024]; |
| char *query_with_timeout; |
| char *query_str; |
| char *at; |
| |
| rc = recv(ofd->fd, rxbuf, sizeof(rxbuf), 0); |
| if (rc == 0) |
| goto close; |
| |
| if (rc < 0) { |
| if (errno == EAGAIN) |
| return 0; |
| goto close; |
| } |
| |
| if (rc >= sizeof(c->query_str)) |
| goto close; |
| |
| rxbuf[rc] = '\0'; |
| query_with_timeout = strtok(rxbuf, "\r\n"); |
| if (!query_with_timeout) { |
| print_error("ERROR: failed to read line from socket\n"); |
| goto close; |
| } |
| |
| at = strchr(query_with_timeout, '@'); |
| query_str = at ? at + 1 : query_with_timeout; |
| |
| if (c->query_str[0]) { |
| print_error("ERROR: Only one query per client connect is allowed;" |
| " received '%s' and '%s' on the same connection\n", |
| c->query_str, query_str); |
| formatters[globals.format](g_buf, sizeof(g_buf), query_str, NULL); |
| socket_client_respond_result(c, g_buf); |
| return 0; |
| } |
| |
| OSMO_STRLCPY_ARRAY(c->query_str, query_str); |
| start_query_str(query_with_timeout); |
| printf("query: %s\n", query_with_timeout); |
| return rc; |
| |
| close: |
| socket_client_close(c); |
| return -1; |
| } |
| |
| static int socket_cb(struct osmo_fd *ofd, unsigned int flags) |
| { |
| int rc = 0; |
| |
| if (flags & OSMO_FD_READ) |
| rc = socket_read_cb(ofd); |
| if (rc < 0) |
| return rc; |
| |
| return rc; |
| } |
| |
| int socket_accept(struct osmo_fd *ofd, unsigned int flags) |
| { |
| struct socket_client *c; |
| struct sockaddr_un un_addr; |
| socklen_t len; |
| int rc; |
| |
| len = sizeof(un_addr); |
| rc = accept(ofd->fd, (struct sockaddr*)&un_addr, &len); |
| if (rc < 0) { |
| print_error("Failed to accept a new connection\n"); |
| return -1; |
| } |
| |
| c = talloc_zero(globals.ctx, struct socket_client); |
| OSMO_ASSERT(c); |
| c->ofd.fd = rc; |
| c->ofd.when = OSMO_FD_READ; |
| c->ofd.cb = socket_cb; |
| c->ofd.data = c; |
| |
| if (osmo_fd_register(&c->ofd) != 0) { |
| print_error("Failed to register new connection fd\n"); |
| close(c->ofd.fd); |
| c->ofd.fd = -1; |
| talloc_free(c); |
| return -1; |
| } |
| |
| llist_add(&c->entry, &globals.socket_clients); |
| |
| if (globals.format == FORMAT_CSV && cmdline_opts.csv_headers) |
| write(c->ofd.fd, CSV_HEADERS, strlen(CSV_HEADERS)); |
| |
| return 0; |
| } |
| |
| int socket_init(const char *sock_path) |
| { |
| struct osmo_fd *ofd = &globals.socket_ofd; |
| int rc; |
| |
| ofd->fd = osmo_sock_unix_init(SOCK_SEQPACKET, 0, sock_path, OSMO_SOCK_F_BIND); |
| if (ofd->fd < 0) { |
| print_error("Could not create unix socket: %s: %s\n", sock_path, strerror(errno)); |
| return -1; |
| } |
| |
| ofd->when = OSMO_FD_READ; |
| ofd->cb = socket_accept; |
| |
| rc = osmo_fd_register(ofd); |
| if (rc < 0) { |
| print_error("Could not register listen fd: %d\n", rc); |
| close(ofd->fd); |
| return rc; |
| } |
| return 0; |
| } |
| |
| void socket_close() |
| { |
| struct socket_client *c, *n; |
| llist_for_each_entry_safe(c, n, &globals.socket_clients, entry) |
| socket_client_close(c); |
| if (osmo_fd_is_registered(&globals.socket_ofd)) { |
| close(globals.socket_ofd.fd); |
| globals.socket_ofd.fd = -1; |
| osmo_fd_unregister(&globals.socket_ofd); |
| } |
| } |
| |
| struct query { |
| struct llist_head entry; |
| |
| char query_str[128]; |
| struct osmo_mslookup_query query; |
| uint32_t handle; |
| }; |
| |
| void respond_result(const char *query_str, const struct osmo_mslookup_result *r) |
| { |
| struct socket_client *c, *n; |
| formatters[globals.format](g_buf, sizeof(g_buf), query_str, r); |
| respond_str_stdout(g_buf); |
| |
| llist_for_each_entry_safe(c, n, &globals.socket_clients, entry) { |
| if (!strcmp(query_str, c->query_str)) { |
| socket_client_respond_result(c, g_buf); |
| if (!r || r->last) |
| socket_client_close(c); |
| } |
| } |
| if (!r || r->last) |
| globals.requests_handled++; |
| } |
| |
| void respond_err(const char *query_str) |
| { |
| respond_result(query_str, NULL); |
| } |
| |
| struct query *query_by_handle(uint32_t request_handle) |
| { |
| struct query *q; |
| llist_for_each_entry(q, &globals.queries, entry) { |
| if (request_handle == q->handle) |
| return q; |
| } |
| return NULL; |
| } |
| |
| void mslookup_result_cb(struct osmo_mslookup_client *client, |
| uint32_t request_handle, |
| const struct osmo_mslookup_query *query, |
| const struct osmo_mslookup_result *result) |
| { |
| struct query *q = query_by_handle(request_handle); |
| if (!q) |
| return; |
| respond_result(q->query_str, result); |
| if (result->last) { |
| llist_del(&q->entry); |
| talloc_free(q); |
| } |
| } |
| |
| void start_query_str(const char *query_str) |
| { |
| struct query *q; |
| const char *domain_str = query_str; |
| char *at; |
| struct osmo_mslookup_query_handling h = { |
| .min_wait_milliseconds = cmdline_opts.min_delay, |
| .result_timeout_milliseconds = cmdline_opts.timeout, |
| .result_cb = mslookup_result_cb, |
| }; |
| |
| at = strchr(query_str, '@'); |
| if (at) { |
| int rc; |
| char timeouts[16]; |
| char *dash; |
| char *timeout; |
| |
| domain_str = at + 1; |
| |
| h.min_wait_milliseconds = h.result_timeout_milliseconds = 0; |
| |
| if (osmo_print_n(timeouts, sizeof(timeouts), query_str, at - query_str) >= sizeof(timeouts)) { |
| print_error("ERROR: timeouts part too long in query string\n"); |
| respond_err(domain_str); |
| return; |
| } |
| |
| dash = strchr(timeouts, '-'); |
| if (dash) { |
| char min_delay[16]; |
| osmo_print_n(min_delay, sizeof(min_delay), timeouts, dash - timeouts); |
| h.min_wait_milliseconds = parse_int(0, UINT32_MAX, min_delay, &rc); |
| if (rc) { |
| print_error("ERROR: invalid min-delay number: %s\n", min_delay); |
| respond_err(domain_str); |
| return; |
| } |
| timeout = dash + 1; |
| } else { |
| timeout = timeouts; |
| } |
| if (*timeout) { |
| h.result_timeout_milliseconds = parse_int(0, UINT32_MAX, timeout, &rc); |
| if (rc) { |
| print_error("ERROR: invalid timeout number: %s\n", timeout); |
| respond_err(domain_str); |
| return; |
| } |
| } |
| } |
| |
| if (strlen(domain_str) >= sizeof(q->query_str)) { |
| print_error("ERROR: query string is too long: '%s'\n", domain_str); |
| respond_err(domain_str); |
| return; |
| } |
| |
| q = talloc_zero(globals.ctx, struct query); |
| OSMO_ASSERT(q); |
| OSMO_STRLCPY_ARRAY(q->query_str, domain_str); |
| |
| if (osmo_mslookup_query_init_from_domain_str(&q->query, q->query_str)) { |
| print_error("ERROR: cannot parse query string: '%s'\n", domain_str); |
| respond_err(domain_str); |
| talloc_free(q); |
| return; |
| } |
| |
| q->handle = osmo_mslookup_client_request(globals.mslookup_client, &q->query, &h); |
| if (!q->handle) { |
| print_error("ERROR: cannot send query: '%s'\n", domain_str); |
| respond_err(domain_str); |
| talloc_free(q); |
| return; |
| } |
| |
| llist_add(&q->entry, &globals.queries); |
| } |
| |
| void start_query_strs(char **query_strs, size_t query_strs_len) |
| { |
| int i; |
| for (i = 0; i < query_strs_len; i++) |
| start_query_str(query_strs[i]); |
| } |
| |
| int main(int argc, char **argv) |
| { |
| int rc = EXIT_FAILURE; |
| globals.ctx = talloc_named_const(NULL, 0, "osmo-mslookup-client"); |
| |
| osmo_init_logging2(globals.ctx, NULL); |
| log_set_print_filename2(osmo_stderr_target, LOG_FILENAME_BASENAME); |
| log_set_print_filename_pos(osmo_stderr_target, LOG_FILENAME_POS_LINE_END); |
| log_set_print_level(osmo_stderr_target, 1); |
| log_set_print_category(osmo_stderr_target, 1); |
| log_set_print_category_hex(osmo_stderr_target, 0); |
| log_set_print_extended_timestamp(osmo_stderr_target, 1); |
| log_set_use_color(osmo_stderr_target, 0); |
| |
| while (1) { |
| int c; |
| long long int val; |
| char *endptr; |
| int option_index = 0; |
| |
| static struct option long_options[] = { |
| { "format", 1, 0, 'f' }, |
| { "no-csv-headers", 0, 0, 'H' }, |
| { "daemon", 0, 0, 'd' }, |
| { "mdns-ip", 1, 0, 'm' }, |
| { "mdns-port", 1, 0, 'M' }, |
| { "mdns-domain-suffix", 1, 0, 'D' }, |
| { "timeout", 1, 0, 'T' }, |
| { "min-delay", 1, 0, 't' }, |
| { "socket", 1, 0, 's' }, |
| { "send", 0, 0, 'S' }, |
| { "quiet", 0, 0, 'q' }, |
| { "help", 0, 0, 'h' }, |
| { "version", 0, 0, 'V' }, |
| {} |
| }; |
| |
| #define PARSE_INT(TARGET, MINVAL, MAXVAL) do { \ |
| int _rc; \ |
| TARGET = parse_int(MINVAL, MAXVAL, optarg, &_rc); \ |
| if (_rc) { \ |
| print_error("Invalid " #TARGET ": %s\n", optarg); \ |
| goto program_exit; \ |
| } \ |
| } while (0) |
| |
| c = getopt_long(argc, argv, "f:Hdm:M:D:t:T:s:SqhV", long_options, &option_index); |
| |
| if (c == -1) |
| break; |
| |
| switch (c) { |
| case 'f': |
| cmdline_opts.format_str = optarg; |
| break; |
| case 'H': |
| cmdline_opts.csv_headers = false; |
| break; |
| case 'd': |
| cmdline_opts.daemon = true; |
| break; |
| case 'm': |
| if (osmo_sockaddr_str_from_str(&cmdline_opts.mdns_addr, optarg, cmdline_opts.mdns_addr.port) |
| || !osmo_sockaddr_str_is_nonzero(&cmdline_opts.mdns_addr)) { |
| print_error("Invalid mDNS IP address: %s\n", optarg); |
| goto program_exit; |
| } |
| break; |
| case 'M': |
| PARSE_INT(cmdline_opts.mdns_addr.port, 1, 65535); |
| break; |
| case 'D': |
| cmdline_opts.mdns_domain_suffix = optarg; |
| break; |
| case 't': |
| PARSE_INT(cmdline_opts.min_delay, 0, UINT32_MAX); |
| break; |
| case 'T': |
| PARSE_INT(cmdline_opts.timeout, 0, UINT32_MAX); |
| break; |
| case 's': |
| cmdline_opts.socket_path = optarg; |
| break; |
| case 'S': |
| cmdline_opts.send = true; |
| break; |
| case 'q': |
| cmdline_opts.quiet = true; |
| break; |
| |
| case 'h': |
| print_help(); |
| rc = 0; |
| goto program_exit; |
| case 'V': |
| print_version(); |
| rc = 0; |
| goto program_exit; |
| |
| default: |
| /* catch unknown options *as well as* missing arguments. */ |
| print_error("Error in command line options. Exiting.\n"); |
| goto program_exit; |
| } |
| } |
| |
| if (cmdline_opts.send) { |
| if (cmdline_opts.daemon || cmdline_opts.format_str || cmdline_opts.socket_path) { |
| print_error("--send option cannot have any listening related args."); |
| } |
| rc = do_send(argc - optind, argv + optind); |
| goto program_exit; |
| } |
| |
| if (!cmdline_opts.daemon && !(argc - optind)) { |
| print_help(); |
| goto program_exit; |
| } |
| |
| if (cmdline_opts.daemon && !cmdline_opts.timeout) { |
| print_error("In daemon mode, --timeout must not be zero.\n"); |
| goto program_exit; |
| } |
| |
| if (cmdline_opts.quiet) |
| log_target_destroy(osmo_stderr_target); |
| |
| if (cmdline_opts.format_str) { |
| if (osmo_str_startswith("json", cmdline_opts.format_str)) |
| globals.format = FORMAT_JSON; |
| else if (osmo_str_startswith("csv", cmdline_opts.format_str)) |
| globals.format = FORMAT_CSV; |
| else { |
| print_error("Invalid format: %s\n", cmdline_opts.format_str); |
| goto program_exit; |
| } |
| } |
| |
| if (globals.format == FORMAT_CSV && cmdline_opts.csv_headers) |
| respond_str_stdout(CSV_HEADERS); |
| |
| globals.mslookup_client = osmo_mslookup_client_new(globals.ctx); |
| if (!globals.mslookup_client |
| || !osmo_mslookup_client_add_mdns(globals.mslookup_client, |
| cmdline_opts.mdns_addr.ip, cmdline_opts.mdns_addr.port, |
| -1, cmdline_opts.mdns_domain_suffix)) { |
| print_error("Failed to start mDNS client\n"); |
| goto program_exit; |
| } |
| |
| if (cmdline_opts.socket_path) { |
| if (socket_init(cmdline_opts.socket_path)) |
| goto program_exit; |
| } |
| |
| start_query_strs(&argv[optind], argc - optind); |
| |
| while (1) { |
| osmo_select_main_ctx(0); |
| |
| if (!cmdline_opts.daemon |
| && globals.requests_handled |
| && llist_empty(&globals.queries)) |
| break; |
| } |
| |
| rc = 0; |
| program_exit: |
| osmo_mslookup_client_free(globals.mslookup_client); |
| socket_close(); |
| log_fini(); |
| talloc_free(globals.ctx); |
| return rc; |
| } |