-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
+/* SPDX-License-Identifier: LGPL-2.1+ */
/***
This file is part of systemd.
Copyright 2013 David Strauss
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
-#include <arpa/inet.h>
#include <errno.h>
+#include <fcntl.h>
#include <getopt.h>
+#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-#include <netdb.h>
-#include <fcntl.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <unistd.h>
#include "sd-daemon.h"
#include "sd-event.h"
#include "sd-resolve.h"
+
+#include "alloc-util.h"
+#include "fd-util.h"
#include "log.h"
+#include "path-util.h"
+#include "set.h"
#include "socket-util.h"
+#include "string-util.h"
+#include "parse-util.h"
#include "util.h"
-#include "event-util.h"
-#include "build.h"
-#include "set.h"
-#include "path-util.h"
#define BUFFER_SIZE (256 * 1024)
-#define CONNECTIONS_MAX 256
+static unsigned arg_connections_max = 256;
static const char *arg_remote_host = NULL;
}
static void context_free(Context *context) {
- sd_event_source *es;
- Connection *c;
-
assert(context);
- while ((es = set_steal_first(context->listen)))
- sd_event_source_unref(es);
-
- while ((c = set_first(context->connections)))
- connection_free(c);
-
- set_free(context->listen);
- set_free(context->connections);
+ set_free_with_destructor(context->listen, sd_event_source_unref);
+ set_free_with_destructor(context->connections, connection_free);
sd_event_unref(context->event);
sd_resolve_unref(context->resolve);
return 0;
r = pipe2(buffer, O_CLOEXEC|O_NONBLOCK);
- if (r < 0) {
- log_error("Failed to allocate pipe buffer: %m");
- return -errno;
- }
+ if (r < 0)
+ return log_error_errno(errno, "Failed to allocate pipe buffer: %m");
(void) fcntl(buffer[0], F_SETPIPE_SZ, BUFFER_SIZE);
r = fcntl(buffer[0], F_GETPIPE_SZ);
- if (r < 0) {
- log_error("Failed to get pipe buffer size: %m");
- return -errno;
- }
+ if (r < 0)
+ return log_error_errno(errno, "Failed to get pipe buffer size: %m");
assert(r > 0);
*sz = r;
if (z > 0) {
*full += z;
shoveled = true;
- } else if (z == 0 || errno == EPIPE || errno == ECONNRESET) {
+ } else if (z == 0 || IN_SET(errno, EPIPE, ECONNRESET)) {
*from_source = sd_event_source_unref(*from_source);
*from = safe_close(*from);
- } else if (errno != EAGAIN && errno != EINTR) {
- log_error("Failed to splice: %m");
- return -errno;
- }
+ } else if (!IN_SET(errno, EAGAIN, EINTR))
+ return log_error_errno(errno, "Failed to splice: %m");
}
if (*full > 0 && *to >= 0) {
if (z > 0) {
*full -= z;
shoveled = true;
- } else if (z == 0 || errno == EPIPE || errno == ECONNRESET) {
+ } else if (z == 0 || IN_SET(errno, EPIPE, ECONNRESET)) {
*to_source = sd_event_source_unref(*to_source);
*to = safe_close(*to);
- } else if (errno != EAGAIN && errno != EINTR) {
- log_error("Failed to splice: %m");
- return -errno;
- }
+ } else if (!IN_SET(errno, EAGAIN, EINTR))
+ return log_error_errno(errno, "Failed to splice: %m");
}
} while (shoveled);
solen = sizeof(error);
r = getsockopt(fd, SOL_SOCKET, SO_ERROR, &error, &solen);
if (r < 0) {
- log_error("Failed to issue SO_ERROR: %m");
+ log_error_errno(errno, "Failed to issue SO_ERROR: %m");
goto fail;
}
c->client_fd = socket(sa->sa_family, SOCK_STREAM|SOCK_NONBLOCK|SOCK_CLOEXEC, 0);
if (c->client_fd < 0) {
- log_error("Failed to get remote socket: %m");
+ log_error_errno(errno, "Failed to get remote socket: %m");
goto fail;
}
goto fail;
}
} else {
- log_error("Failed to connect to remote host: %m");
+ log_error_errno(errno, "Failed to connect to remote host: %m");
goto fail;
}
} else {
union sockaddr_union sa = {};
const char *node, *service;
- socklen_t salen;
int r;
if (path_is_absolute(arg_remote_host)) {
sa.un.sun_family = AF_UNIX;
- strncpy(sa.un.sun_path, arg_remote_host, sizeof(sa.un.sun_path)-1);
- sa.un.sun_path[sizeof(sa.un.sun_path)-1] = 0;
-
- salen = offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path);
-
- return connection_start(c, &sa.sa, salen);
+ strncpy(sa.un.sun_path, arg_remote_host, sizeof(sa.un.sun_path));
+ return connection_start(c, &sa.sa, SOCKADDR_UN_LEN(sa.un));
}
if (arg_remote_host[0] == '@') {
sa.un.sun_family = AF_UNIX;
sa.un.sun_path[0] = 0;
- strncpy(sa.un.sun_path+1, arg_remote_host+1, sizeof(sa.un.sun_path)-2);
- sa.un.sun_path[sizeof(sa.un.sun_path)-1] = 0;
-
- salen = offsetof(union sockaddr_union, un.sun_path) + 1 + strlen(sa.un.sun_path + 1);
-
- return connection_start(c, &sa.sa, salen);
+ strncpy(sa.un.sun_path+1, arg_remote_host+1, sizeof(sa.un.sun_path)-1);
+ return connection_start(c, &sa.sa, SOCKADDR_UN_LEN(sa.un));
}
service = strrchr(arg_remote_host, ':');
if (service) {
node = strndupa(arg_remote_host, service - arg_remote_host);
- service ++;
+ service++;
} else {
node = arg_remote_host;
service = "80";
assert(context);
assert(fd >= 0);
- if (set_size(context->connections) > CONNECTIONS_MAX) {
+ if (set_size(context->connections) > arg_connections_max) {
log_warning("Hit connection limit, refusing connection.");
safe_close(fd);
return 0;
nfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK|SOCK_CLOEXEC);
if (nfd < 0) {
if (errno != -EAGAIN)
- log_warning("Failed to accept() socket: %m");
+ log_warning_errno(errno, "Failed to accept() socket: %m");
} else {
- getpeername_pretty(nfd, &peer);
+ getpeername_pretty(nfd, true, &peer);
log_debug("New connection from %s", strna(peer));
r = add_connection_socket(context, nfd);
printf("%1$s [HOST:PORT]\n"
"%1$s [SOCKET]\n\n"
"Bidirectionally proxy local sockets to another (possibly remote) socket.\n\n"
+ " -c --connections-max= Set the maximum number of connections to be accepted\n"
" -h --help Show this help\n"
" --version Show package version\n",
program_invocation_short_name);
};
static const struct option options[] = {
- { "help", no_argument, NULL, 'h' },
- { "version", no_argument, NULL, ARG_VERSION },
+ { "connections-max", required_argument, NULL, 'c' },
+ { "help", no_argument, NULL, 'h' },
+ { "version", no_argument, NULL, ARG_VERSION },
{}
};
- int c;
+ int c, r;
assert(argc >= 0);
assert(argv);
- while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
+ while ((c = getopt_long(argc, argv, "c:h", options, NULL)) >= 0)
switch (c) {
help();
return 0;
+ case 'c':
+ r = safe_atou(optarg, &arg_connections_max);
+ if (r < 0) {
+ log_error("Failed to parse --connections-max= argument: %s", optarg);
+ return r;
+ }
+
+ if (arg_connections_max < 1) {
+ log_error("Connection limit is too low.");
+ return -EINVAL;
+ }
+
+ break;
+
case ARG_VERSION:
- puts(PACKAGE_STRING);
- puts(SYSTEMD_FEATURES);
- return 0;
+ return version();
case '?':
return -EINVAL;
projects / thirdparty / systemd.git / blobdiff