160 lines
3.5 KiB
C
160 lines
3.5 KiB
C
/* authd/authd.c - main code for authd
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* Copyright (c) 2016 William Pitcock <nenolod@dereferenced.org>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice is present in all copies.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "authd.h"
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#include "dns.h"
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#define MAXPARA 10
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static void handle_reload(int parc, char *parv[]);
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static void handle_stat(int parc, char *parv[]);
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rb_helper *authd_helper = NULL;
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authd_cmd_handler authd_cmd_handlers[256] = {
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['H'] = handle_reload,
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['D'] = resolve_dns,
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['S'] = handle_stat,
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};
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authd_stat_handler authd_stat_handlers[256] = {
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['D'] = enumerate_nameservers,
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};
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authd_reload_handler authd_reload_handlers[256] = {
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['D'] = reload_nameservers,
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};
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static void
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handle_stat(int parc, char *parv[])
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{
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authd_stat_handler handler;
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if(parc < 3)
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/* XXX Should log this somehow */
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return;
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if (!(handler = authd_stat_handlers[(unsigned char)parv[2][0]]))
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return;
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handler(parv[1], parv[2][0]);
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}
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static void
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handle_reload(int parc, char *parv[])
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{
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authd_reload_handler handler;
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if(parc < 2)
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/* XXX Should log this somehow */
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return;
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if (!(handler = authd_reload_handlers[(unsigned char)parv[1][0]]))
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return;
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handler(parv[1][0]);
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}
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static void
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parse_request(rb_helper *helper)
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{
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static char *parv[MAXPARA + 1];
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static char readbuf[READBUF_SIZE];
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int parc;
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int len;
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authd_cmd_handler handler;
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while((len = rb_helper_read(helper, readbuf, sizeof(readbuf))) > 0)
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{
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parc = rb_string_to_array(readbuf, parv, MAXPARA);
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if(parc < 1)
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continue;
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handler = authd_cmd_handlers[(unsigned char)parv[0][0]];
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if (handler != NULL)
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handler(parc, parv);
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}
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}
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static void
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error_cb(rb_helper *helper)
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{
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exit(1);
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}
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#ifndef _WIN32
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static void
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dummy_handler(int sig)
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{
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return;
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}
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#endif
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static void
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setup_signals(void)
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{
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#ifndef _WIN32
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struct sigaction act;
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act.sa_flags = 0;
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act.sa_handler = SIG_IGN;
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sigemptyset(&act.sa_mask);
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sigaddset(&act.sa_mask, SIGPIPE);
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sigaddset(&act.sa_mask, SIGALRM);
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#ifdef SIGTRAP
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sigaddset(&act.sa_mask, SIGTRAP);
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#endif
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#ifdef SIGWINCH
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sigaddset(&act.sa_mask, SIGWINCH);
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sigaction(SIGWINCH, &act, 0);
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#endif
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sigaction(SIGPIPE, &act, 0);
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#ifdef SIGTRAP
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sigaction(SIGTRAP, &act, 0);
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#endif
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act.sa_handler = dummy_handler;
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sigaction(SIGALRM, &act, 0);
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#endif
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}
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int
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main(int argc, char *argv[])
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{
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setup_signals();
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authd_helper = rb_helper_child(parse_request, error_cb, NULL, NULL, NULL, 256, 256, 256); /* XXX fix me */
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if(authd_helper == NULL)
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{
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fprintf(stderr, "authd is not meant to be invoked by end users\n");
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exit(1);
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}
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rb_set_time();
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setup_signals();
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init_resolver();
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rb_init_prng(NULL, RB_PRNG_DEFAULT);
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rb_helper_loop(authd_helper, 0);
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return 0;
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}
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