add -o SSH_OPTION option

doc/mscp.1.in

@@ -47,7 +47,10 @@ mscp \- copy files over multiple SSH connections
 .BI \-P \ PORT\c
 ]
 [\c
-.BI \-F \ CONFIG\c
+.BI \-F \ SSH_CONFIG\c
+]
+[\c
+.BI \-o \ SSH_OPTION\c
 ]
 [\c
 .BI \-i \ IDENTITY\c
@@ -247,12 +250,19 @@ Specifies the port number to connect to on the remote machine as with
 ssh(1) and scp(1).
 
 .TP
-.B \-F \fICONFIG\fR
+.B \-F \fISSH_CONFIG\fR
 Specifies an alternative per-user ssh configuration file. Note that
 acceptable options in the configuration file are what
 .I libssh
 supports.
 
+.TP
+.B \-o \fISSH_OPTION\fR
+Specifies ssh options in the format used in ssh_config. Note that
+acceptable options are what
+.I libssh
+supports.
+
 .TP
 .B \-i \fIIDENTITY\fR
 Specifies the identity file for public key authentication.

doc/mscp.rst

@@ -2,7 +2,7 @@
 MSCP
 ====
 
-:Date: v0.1.5-10-g00fa2c7
+:Date: v0.1.5-13-gf2f0dab
 
 NAME
 ====
@@ -17,9 +17,9 @@ SYNOPSIS
 *CHECKPOINT* ] [ **-R** *CHECKPOINT* ] [ **-s** *MIN_CHUNK_SIZE* ] [
 **-S** *MAX_CHUNK_SIZE* ] [ **-a** *NR_AHEAD* ] [ **-b** *BUF_SIZE* ] [
 **-L** *LIMIT_BITRATE* ] [ **-l** *LOGIN_NAME* ] [ **-P** *PORT* ] [
-**-F** *CONFIG* ] [ **-i** *IDENTITY* ] [ **-c** *CIPHER* ] [ **-M**
+**-F** *SSH_CONFIG* ] [ **-o** *SSH_OPTION* ] [ **-i** *IDENTITY* ] [
-*HMAC* ] [ **-C** *COMPRESS* ] [ **-g** *CONGESTION* ] *source ...
+**-c** *CIPHER* ] [ **-M** *HMAC* ] [ **-C** *COMPRESS* ] [ **-g**
-target*
+*CONGESTION* ] *source ... target*
 
 DESCRIPTION
 ===========
@@ -144,11 +144,15 @@ OPTIONS
    Specifies the port number to connect to on the remote machine as with
    ssh(1) and scp(1).
 
-**-F CONFIG**
+**-F SSH_CONFIG**
    Specifies an alternative per-user ssh configuration file. Note that
    acceptable options in the configuration file are what *libssh*
    supports.
 
+**-o SSH_OPTION**
+   Specifies ssh options in the format used in ssh_config. Note that
+   acceptable options are what *libssh* supports.
+
 **-i IDENTITY**
    Specifies the identity file for public key authentication.
 

include/mscp.h

@@ -61,6 +61,7 @@ struct mscp_ssh_opts {
 	char	*port;		/** ssh port */
 	int	ai_family;	/** address family */
 	char	*config;	/** path to ssh_config, default ~/.ssh/config*/
+	char	**options;	/** array of ssh_config options, terminated by NULL */
 	char	*identity;	/** path to private key */
 	char	*cipher;	/** cipher spec */
 	char	*hmac;		/** hmacp spec */

src/main.c

@@ -28,8 +28,9 @@ void usage(bool print_help)
 	       "            [-u max_startups] [-I interval] [-W checkpoint] [-R checkpoint]\n"
 	       "            [-s min_chunk_sz] [-S max_chunk_sz] [-a nr_ahead]\n"
 	       "            [-b buf_sz] [-L limit_bitrate]\n"
-	       "            [-l login_name] [-P port] [-F ssh_config] [-i identity_file]\n"
+	       "            [-l login_name] [-P port] [-F ssh_config] [-o ssh_option]\n"
-	       "            [-c cipher_spec] [-M hmac_spec] [-C compress] [-g congestion]\n"
+	       "            [-i identity_file] [-c cipher_spec] [-M hmac_spec]\n"
+	       "            [-C compress] [-g congestion]\n"
 	       "            source ... target\n"
 	       "\n");
 
@@ -60,7 +61,8 @@ void usage(bool print_help)
 	       "\n"
 	       "    -l LOGIN_NAME      login name\n"
 	       "    -P PORT            port number\n"
-	       "    -F CONFIG          path to user ssh config (default ~/.ssh/config)\n"
+	       "    -F SSH_CONFIG      path to user ssh config (default ~/.ssh/config)\n"
+	       "    -o SSH_OPTION      ssh_config option\n"
 	       "    -i IDENTITY        identity file for public key authentication\n"
 	       "    -c CIPHER          cipher spec\n"
 	       "    -M HMAC            hmac spec\n"
@@ -267,6 +269,7 @@ int main(int argc, char **argv)
 	int direction = 0;
 	char *remote = NULL, *checkpoint_save = NULL, *checkpoint_load = NULL;
 	bool dryrun = false, resume = false;
+	int nr_options = 0;
 	size_t factor = 1;
 	char *unit;
 
@@ -274,7 +277,7 @@ int main(int argc, char **argv)
 	memset(&o, 0, sizeof(o));
 	o.severity = MSCP_SEVERITY_WARN;
 
-#define mscpopts "n:m:u:I:W:R:s:S:a:b:L:46vqDrl:P:i:F:c:M:C:g:pdNh"
+#define mscpopts "n:m:u:I:W:R:s:S:a:b:L:46vqDrl:P:i:F:o:c:M:C:g:pdNh"
 	while ((ch = getopt(argc, argv, mscpopts)) != -1) {
 		switch (ch) {
 		case 'n':
@@ -359,6 +362,16 @@ int main(int argc, char **argv)
 		case 'F':
 			s.config = optarg;
 			break;
+		case 'o':
+			nr_options++;
+			s.options = realloc(s.options, sizeof(char *) * (nr_options + 1));
+			if (!s.options) {
+				pr_err("realloc: %s", strerrno());
+				return 1;
+			}
+			s.options[nr_options - 1] = optarg;
+			s.options[nr_options] = NULL;
+			break;
 		case 'i':
 			s.identity = optarg;
 			break;

src/ssh.c

@@ -4,12 +4,13 @@
 #include <unistd.h>
 #include <stdlib.h>
 
-#include "libssh/callbacks.h"
-
 #include <ssh.h>
 #include <mscp.h>
 #include <strerrno.h>
 
+#include "libssh/callbacks.h"
+#include "libssh/options.h"
+
 static int ssh_verify_known_hosts(ssh_session session);
 static int ssh_authenticate_kbdint(ssh_session session);
 
@@ -87,6 +88,17 @@ static int ssh_set_opts(ssh_session ssh, struct mscp_ssh_opts *opts)
 		return -1;
 	}
 
+	if (opts->options) {
+		int n;
+		for (n = 0; opts->options[n]; n++) {
+			if (ssh_config_parse_string(ssh, opts->options[n]) != SSH_OK) {
+				priv_set_errv("failed to set ssh option %s: %s",
+					      opts->options[n]);
+				return -1;
+			}
+		}
+	}
+
 	return 0;
 }
 

test/test_e2e.py

@@ -496,6 +496,40 @@ def test_config_ng(mscp, src_prefix, dst_prefix):
     src.cleanup()
     dst.cleanup()
 
+
+param_valid_option_ok = [
+    [ "-o", "Port=8022" ],
+    [ "-o", "Port=8022", "-o", "User=root" ],
+    [ "-o", "unknown-option-is-silently-ignored" ],
+]
+@pytest.mark.parametrize("src_prefix, dst_prefix", param_remote_prefix)
+@pytest.mark.parametrize("option", param_valid_option_ok)
+def test_inline_option_ok(mscp, src_prefix, dst_prefix, option):
+    """ change port number with -o option. it should be ok. """
+    src = File("src", size = 1024 * 1024).make()
+    dst = File("dst")
+    run2ok([mscp, "-vvv"] + option +
+           [src_prefix + src.path, dst_prefix + dst.path])
+    assert check_same_md5sum(src, dst)
+    src.cleanup()
+    dst.cleanup()
+
+
+param_valid_option_ng = [
+    [ "-o", "Port=8023" ],
+    [ "-o", "User=invaliduser" ],
+]
+@pytest.mark.parametrize("src_prefix, dst_prefix", param_remote_prefix)
+@pytest.mark.parametrize("option", param_valid_option_ng)
+def test_inline_option_ng(mscp, src_prefix, dst_prefix, option):
+    """ change port number with -o option. it should be ng. """
+    src = File("src", size = 1024 * 1024).make()
+    dst = File("dst")
+    run2ng([mscp, "-vvv"] + option +
+           [src_prefix + src.path, dst_prefix + dst.path])
+    src.cleanup()
+
+
 # username test assumes that this test runs inside a container, see Dockerfiles
 def test_specify_passphrase_via_env(mscp):
     src = File(os.getcwd() + "/src", size = 1024).make()
@@ -552,8 +586,8 @@ def test_10k_files(mscp, src_prefix, dst_prefix):
 
 @pytest.mark.parametrize("src_prefix, dst_prefix", param_remote_prefix)
 def test_checkpoint_dump_and_resume(mscp, src_prefix, dst_prefix):
-    src1 = File("src1", size = 512 * 1024 * 1024).make()
+    src1 = File("src1", size = 64 * 1024 * 1024).make()
-    src2 = File("src2", size = 512 * 1024 * 1024).make()
+    src2 = File("src2", size = 64 * 1024 * 1024).make()
     dst1 = File("dst/src1")
     dst2 = File("dst/src2")
     run2ok([mscp, "-vvv", "-W", "checkpoint", "-D",