*/
#include <fcntl.h>
+#include <netinet/in.h>
+#include <sys/epoll.h>
#include <sys/stat.h>
#include <srs2.h>
#include "common.h"
+#include "daemon.h"
#include "mem.h"
+#include "buffer.h"
-static srs_t *srs = NULL;
+#define DEFAULT_ENCODER_PORT 10000
+#define DEFAULT_DECODER_PORT 10001
+#define __tostr(x) #x
+#define STR(x) __tostr(x)
-static int read_sfile(const char *sfile)
+/* srs encoder/decoder/listener worker {{{ */
+
+typedef struct srsd_t {
+ unsigned listener : 1;
+ unsigned decoder : 1;
+ unsigned watchwr : 1;
+ int fd;
+ buffer_t ibuf;
+ buffer_t obuf;
+} srsd_t;
+
+static srsd_t *srsd_new(void)
{
- FILE *f;
+ srsd_t *srsd = p_new(srsd_t, 1);
+ srsd->fd = -1;
+ return srsd;
+}
+
+static void srsd_delete(srsd_t **srsd)
+{
+ if (*srsd) {
+ if ((*srsd)->fd >= 0)
+ close((*srsd)->fd);
+ buffer_wipe(&(*srsd)->ibuf);
+ buffer_wipe(&(*srsd)->obuf);
+ p_delete(srsd);
+ }
+}
+
+int process_srs(srs_t *srs, const char *domain, srsd_t *srsd)
+{
+ while (srsd->ibuf.len > 4) {
+ char buf[BUFSIZ], *p, *q, *nl;
+ int err;
+
+ if (strncmp("get ", srsd->ibuf.data, 4)) {
+ syslog(LOG_ERR, "bad request, not starting with \"get \"");
+ return -1;
+ }
+
+ nl = strchr(srsd->ibuf.data + 4, '\n');
+ if (!nl)
+ return 0;
+
+ for (p = srsd->ibuf.data + 4; p < nl && isspace(*p); p++);
+ for (q = nl++; q >= p && isspace(*q); *q-- = '\0');
+
+ if (p == q) {
+ syslog(LOG_WARNING, "empty request");
+ goto skip;
+ }
+
+ if (srsd->decoder) {
+ err = srs_reverse(srs, buf, ssizeof(buf), p);
+ } else {
+ err = srs_forward(srs, buf, ssizeof(buf), p, domain);
+ }
+
+ if (err == 0) {
+ buffer_addstr(&srsd->obuf, "200 ");
+ buffer_addstr(&srsd->obuf, buf);
+ buffer_addstr(&srsd->obuf, "\r\n");
+ } else {
+ switch (SRS_ERROR_TYPE(err)) {
+ case SRS_ERRTYPE_SRS:
+ case SRS_ERRTYPE_SYNTAX:
+ buffer_addstr(&srsd->obuf, "500 ");
+ break;
+ default:
+ buffer_addstr(&srsd->obuf, "400 ");
+ break;
+ }
+ buffer_addstr(&srsd->obuf, srs_strerror(err));
+ buffer_addstr(&srsd->obuf, "\r\n");
+ }
+
+ skip:
+ buffer_consume(&srsd->ibuf, nl - srsd->ibuf.data);
+ }
+
+ return 0;
+}
+
+int start_listener(int epollfd, int port, bool decoder)
+{
+ struct sockaddr_in addr = {
+ .sin_family = AF_INET,
+ .sin_addr = { htonl(INADDR_LOOPBACK) },
+ };
+ struct epoll_event evt = { .events = EPOLLIN };
+ srsd_t *tmp;
+ int sock;
+
+ addr.sin_port = htons(port);
+ sock = tcp_listen((const struct sockaddr *)&addr, sizeof(addr));
+ if (sock < 0) {
+ return -1;
+ }
+
+ evt.data.ptr = tmp = srsd_new();
+ tmp->fd = sock;
+ tmp->decoder = decoder;
+ tmp->listener = true;
+ if (epoll_ctl(epollfd, EPOLL_CTL_ADD, sock, &evt) < 0) {
+ UNIXERR("epoll_ctl");
+ return -1;
+ }
+ return 0;
+}
+
+/* }}} */
+/* administrivia {{{ */
+
+static int main_initialize(void)
+{
+ openlog("srsd", LOG_PID, LOG_MAIL);
+ signal(SIGPIPE, SIG_IGN);
+ signal(SIGINT, &common_sighandler);
+ signal(SIGTERM, &common_sighandler);
+ signal(SIGHUP, &common_sighandler);
+ syslog(LOG_INFO, "Starting...");
+ return 0;
+}
+
+static void main_shutdown(void)
+{
+ syslog(LOG_INFO, cleanexit ? "Stopping..." : "Unclean exit...");
+ closelog();
+}
+
+module_init(main_initialize);
+module_exit(main_shutdown);
+
+void usage(void)
+{
+ fputs("usage: srsd [ -e <port> ] [ -d <port> ] domain secrets\n"
+ "\n"
+ " -e <port> port to listen to for encoding requests\n"
+ " (default: "STR(DEFAULT_ENCODER_PORT)")\n"
+ " -d <port> port to listen to for decoding requests\n"
+ " (default: "STR(DEFAULT_DECODER_PORT)")\n"
+ , stderr);
+}
+
+/* }}} */
+
+int main_loop(srs_t *srs, const char *domain, int port_enc, int port_dec)
+{
+ int exitcode = EXIT_SUCCESS;
+ int epollfd = epoll_create(128);
+
+ if (epollfd < 0) {
+ UNIXERR("epoll_create");
+ exitcode = EXIT_FAILURE;
+ goto error;
+ }
+
+ if (start_listener(epollfd, port_enc, false) < 0)
+ return EXIT_FAILURE;
+ if (start_listener(epollfd, port_dec, true) < 0)
+ return EXIT_FAILURE;
+
+ while (!sigint) {
+ struct epoll_event evts[1024];
+ int n;
+
+ n = epoll_wait(epollfd, evts, countof(evts), -1);
+ if (n < 0) {
+ if (errno != EAGAIN && errno != EINTR) {
+ UNIXERR("epoll_wait");
+ exitcode = EXIT_FAILURE;
+ break;
+ }
+ continue;
+ }
+
+ while (--n >= 0) {
+ srsd_t *srsd = evts[n].data.ptr;
+
+ if (srsd->listener) {
+ struct epoll_event evt = { .events = EPOLLIN };
+ srsd_t *tmp;
+ int sock;
+
+ sock = accept(srsd->fd, NULL, NULL);
+ if (sock < 0) {
+ UNIXERR("accept");
+ continue;
+ }
+
+ evt.data.ptr = tmp = srsd_new();
+ tmp->decoder = srsd->decoder;
+ tmp->fd = sock;
+ if (epoll_ctl(epollfd, EPOLL_CTL_ADD, sock, &evt) < 0) {
+ UNIXERR("epoll_ctl");
+ srsd_delete(&tmp);
+ close(sock);
+ }
+ continue;
+ }
+
+ if (evts[n].events & EPOLLIN) {
+ int res = buffer_read(&srsd->ibuf, srsd->fd, -1);
+
+ if ((res < 0 && errno != EINTR && errno != EAGAIN)
+ || res == 0)
+ {
+ srsd_delete(&srsd);
+ continue;
+ }
+
+ if (process_srs(srs, domain, srsd) < 0) {
+ srsd_delete(&srsd);
+ continue;
+ }
+ }
+
+ if ((evts[n].events & EPOLLOUT) && srsd->obuf.len) {
+ int res = write(srsd->fd, srsd->obuf.data, srsd->obuf.len);
+
+ if (res < 0 && errno != EINTR && errno != EAGAIN) {
+ srsd_delete(&srsd);
+ continue;
+ }
+
+ if (res > 0) {
+ buffer_consume(&srsd->obuf, res);
+ }
+ }
+
+ if (srsd->watchwr == !srsd->obuf.len) {
+ struct epoll_event evt = {
+ .events = EPOLLIN | (srsd->obuf.len ? EPOLLOUT : 0),
+ .data.ptr = srsd,
+ };
+ if (epoll_ctl(epollfd, EPOLL_CTL_MOD, srsd->fd, &evt) < 0) {
+ UNIXERR("epoll_ctl");
+ srsd_delete(&srsd);
+ continue;
+ }
+ srsd->watchwr = srsd->obuf.len != 0;
+ }
+ }
+ }
+
+ close(epollfd);
+
+ error:
+ cleanexit = true;
+ return exitcode;
+}
+
+static srs_t *srs_read_secrets(const char *sfile)
+{
+ srs_t *srs;
char buf[BUFSIZ];
- srs_t *newsrs;
+ FILE *f;
+ int lineno = 0;
f = fopen(sfile, "r");
if (!f) {
UNIXERR("fopen");
- return -1;
+ return NULL;
}
- newsrs = srs_new();
+ srs = srs_new();
while (fgets(buf, sizeof(buf), f)) {
int n = strlen(buf);
- if (buf[n - 1] != '\n')
+ ++lineno;
+ if (buf[n - 1] != '\n') {
+ syslog(LOG_CRIT, "%s:%d: line too long", sfile, lineno);
goto error;
- while (n > 0 && isspace((unsigned char)buf[n - 1]))
- buf[--n] = '\0';
- if (n > 0)
- srs_add_secret(newsrs, buf);
+ }
+
+ srs_add_secret(srs, buf);
}
- fclose(f);
- if (srs) {
- srs_free(srs);
+ if (!lineno) {
+ syslog(LOG_CRIT, "%s: empty file, no secrets", sfile);
+ goto error;
}
- srs = newsrs;
- return 0;
- error:
fclose(f);
- srs_free(newsrs);
- return -1;
-}
+ return srs;
-static void help(void)
-{
- puts(
- "Usage: srs-c [ -r | -d domain ] -f sfile -e sender\n"
- "Perform an SRS encoding / decoding\n"
- "\n"
- " -r perform an SRS decoding\n"
- " -d domain use that domain (required for encoding)\n"
- "\n"
- " -f sfile secret file for decoding. the first line is taken if -s omitted\n"
- "\n"
- " -e sender the sender address we want to encode/decode\n"
- );
- exit(1);
+ error:
+ fclose(f);
+ srs_free(srs);
+ return NULL;
}
int main(int argc, char *argv[])
{
- char *res = NULL;
- char *domain = NULL;
- char *sender = NULL;
- char *sfile = NULL;
-
- int opt = 0;
- bool rev = false;
- int err = 0;
-
- while ((opt = getopt(argc, argv, "d:e:f:r")) != -1) {
- switch (opt) {
- case 'd': domain = optarg; break;
- case 'e': sender = optarg; break;
- case 'f': sfile = optarg; break;
- case 'r': rev = true; break;
- }
- }
+ int port_enc = DEFAULT_ENCODER_PORT;
+ int port_dec = DEFAULT_DECODER_PORT;
+
+ srs_t *srs;
- if (!sender || !sfile || !(rev||domain)) {
- help();
+ if (atexit(common_shutdown)) {
+ fputs("Cannot hook my atexit function, quitting !\n", stderr);
+ return EXIT_FAILURE;
}
+ common_initialize();
- if (read_sfile(sfile) < 0)
- return -1;
+ for (int c = 0; (c = getopt(argc, argv, "he:d:")) >= 0; ) {
+ switch (c) {
+ case 'e':
+ port_enc = atoi(optarg);
+ break;
+ case 'd':
+ port_dec = atoi(optarg);
+ break;
+ default:
+ usage();
+ return EXIT_FAILURE;
+ }
+ }
- if (rev) {
- err = srs_reverse_alloc(srs, &res, sender);
- } else {
- err = srs_forward_alloc(srs, &res, sender, domain);
+ if (argc - optind != 2) {
+ usage();
+ return EXIT_FAILURE;
}
- if (res == NULL) {
- fprintf(stderr, "%s\n", srs_strerror(err));
- return -1;
+ srs = srs_read_secrets(argv[optind + 1]);
+ if (!srs) {
+ return EXIT_FAILURE;
}
- puts(res);
- return 0;
+
+ return main_loop(srs, argv[optind], port_enc, port_dec);
}
projects / apps / pfixtools.git / blobdiff