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add -4 and -6 options to use either IPv4 or IPv6

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This commit is contained in:
Ryo Nakamura
2024-02-07 14:34:15 +09:00
parent a9c59f744a
commit b2628b54fb
8 changed files with 174 additions and 20 deletions
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112
patch/libssh-0.10.6-2-g6f1b1e76.patch
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@@ -37,10 +37,18 @@ index 1fce7b76..b64d1455 100644
int ssh_buffer_validate_length(struct ssh_buffer_struct *buffer, size_t len);
diff --git a/include/libssh/libssh.h b/include/libssh/libssh.h
index 669a0a96..b6a93ac7 100644
index 669a0a96..da5b4099 100644
--- a/include/libssh/libssh.h
+++ b/include/libssh/libssh.h
@@ -402,6 +402,7 @@ enum ssh_options_e {
@@ -368,6 +368,7 @@ enum ssh_options_e {
SSH_OPTIONS_HOST,
SSH_OPTIONS_PORT,
SSH_OPTIONS_PORT_STR,
+ SSH_OPTIONS_AI_FAMILY,
SSH_OPTIONS_FD,
SSH_OPTIONS_USER,
SSH_OPTIONS_SSH_DIR,
@@ -402,6 +403,7 @@ enum ssh_options_e {
SSH_OPTIONS_GSSAPI_AUTH,
SSH_OPTIONS_GLOBAL_KNOWNHOSTS,
SSH_OPTIONS_NODELAY,
@@ -48,7 +56,7 @@ index 669a0a96..b6a93ac7 100644
SSH_OPTIONS_PUBLICKEY_ACCEPTED_TYPES,
SSH_OPTIONS_PROCESS_CONFIG,
SSH_OPTIONS_REKEY_DATA,
@@ -833,6 +834,7 @@ LIBSSH_API const char* ssh_get_hmac_in(ssh_session session);
@@ -833,6 +835,7 @@ LIBSSH_API const char* ssh_get_hmac_in(ssh_session session);
LIBSSH_API const char* ssh_get_hmac_out(ssh_session session);
LIBSSH_API ssh_buffer ssh_buffer_new(void);
@@ -56,7 +64,7 @@ index 669a0a96..b6a93ac7 100644
LIBSSH_API void ssh_buffer_free(ssh_buffer buffer);
#define SSH_BUFFER_FREE(x) \
do { if ((x) != NULL) { ssh_buffer_free(x); x = NULL; } } while(0)
@@ -843,6 +845,8 @@ LIBSSH_API void *ssh_buffer_get(ssh_buffer buffer);
@@ -843,6 +846,8 @@ LIBSSH_API void *ssh_buffer_get(ssh_buffer buffer);
LIBSSH_API uint32_t ssh_buffer_get_len(ssh_buffer buffer);
LIBSSH_API int ssh_session_set_disconnect_message(ssh_session session, const char *message);
@@ -66,10 +74,18 @@ index 669a0a96..b6a93ac7 100644
#include "libssh/legacy.h"
#endif
diff --git a/include/libssh/session.h b/include/libssh/session.h
index 97936195..e4a7f80c 100644
index 97936195..e4fc4fce 100644
--- a/include/libssh/session.h
+++ b/include/libssh/session.h
@@ -258,6 +258,7 @@ struct ssh_session_struct {
@@ -249,6 +249,7 @@ struct ssh_session_struct {
unsigned long timeout; /* seconds */
unsigned long timeout_usec;
uint16_t port;
+ int ai_family;
socket_t fd;
int StrictHostKeyChecking;
char compressionlevel;
@@ -258,6 +259,7 @@ struct ssh_session_struct {
int flags;
int exp_flags;
int nodelay;
@@ -204,9 +220,27 @@ index 8991e006..e0414801 100644
* @brief Ensure the buffer has at least a certain preallocated size.
*
diff --git a/src/connect.c b/src/connect.c
index 15cae644..e7520f40 100644
index 15cae644..02ef43b4 100644
--- a/src/connect.c
+++ b/src/connect.c
@@ -114,7 +114,7 @@ static int ssh_connect_socket_close(socket_t s)
#endif
}
-static int getai(const char *host, int port, struct addrinfo **ai)
+static int getai(const char *host, int port, int ai_family, struct addrinfo **ai)
{
const char *service = NULL;
struct addrinfo hints;
@@ -123,7 +123,7 @@ static int getai(const char *host, int port, struct addrinfo **ai)
ZERO_STRUCT(hints);
hints.ai_protocol = IPPROTO_TCP;
- hints.ai_family = PF_UNSPEC;
+ hints.ai_family = ai_family > 0 ? ai_family : PF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
if (port == 0) {
@@ -156,6 +156,20 @@ static int set_tcp_nodelay(socket_t socket)
sizeof(opt));
}
@@ -228,6 +262,24 @@ index 15cae644..e7520f40 100644
/**
* @internal
*
@@ -173,7 +187,7 @@ socket_t ssh_connect_host_nonblocking(ssh_session session, const char *host,
struct addrinfo *ai = NULL;
struct addrinfo *itr = NULL;
- rc = getai(host, port, &ai);
+ rc = getai(host, port, session->opts.ai_family, &ai);
if (rc != 0) {
ssh_set_error(session, SSH_FATAL,
"Failed to resolve hostname %s (%s)",
@@ -199,7 +213,7 @@ socket_t ssh_connect_host_nonblocking(ssh_session session, const char *host,
SSH_LOG(SSH_LOG_PACKET, "Resolving %s", bind_addr);
- rc = getai(bind_addr, 0, &bind_ai);
+ rc = getai(bind_addr, 0, session->opts.ai_family, &bind_ai);
if (rc != 0) {
ssh_set_error(session, SSH_FATAL,
"Failed to resolve bind address %s (%s)",
@@ -256,6 +270,18 @@ socket_t ssh_connect_host_nonblocking(ssh_session session, const char *host,
}
}
@@ -248,7 +300,7 @@ index 15cae644..e7520f40 100644
rc = connect(s, itr->ai_addr, itr->ai_addrlen);
if (rc == -1 && (errno != 0) && (errno != EINPROGRESS)) {
diff --git a/src/options.c b/src/options.c
index b3ecffe1..fb966fa1 100644
index b3ecffe1..8de24ed6 100644
--- a/src/options.c
+++ b/src/options.c
@@ -217,6 +217,7 @@ int ssh_options_copy(ssh_session src, ssh_session *dest)
@@ -259,7 +311,17 @@ index b3ecffe1..fb966fa1 100644
new->opts.config_processed = src->opts.config_processed;
new->common.log_verbosity = src->common.log_verbosity;
new->common.callbacks = src->common.callbacks;
@@ -458,6 +459,10 @@ int ssh_options_set_algo(ssh_session session,
@@ -268,6 +269,9 @@ int ssh_options_set_algo(ssh_session session,
* - SSH_OPTIONS_PORT_STR:
* The port to connect to (const char *).
*
+ * - SSH_OPTIONS_AI_FAMILY:
+ * The address family for connecting (int *).
+ *
* - SSH_OPTIONS_FD:
* The file descriptor to use (socket_t).\n
* \n
@@ -458,6 +462,10 @@ int ssh_options_set_algo(ssh_session session,
* Set it to disable Nagle's Algorithm (TCP_NODELAY) on the
* session socket. (int, 0=false)
*
@@ -270,7 +332,29 @@ index b3ecffe1..fb966fa1 100644
* - SSH_OPTIONS_PROCESS_CONFIG
* Set it to false to disable automatic processing of per-user
* and system-wide OpenSSH configuration files. LibSSH
@@ -1017,6 +1022,20 @@ int ssh_options_set(ssh_session session, enum ssh_options_e type,
@@ -571,6 +579,21 @@ int ssh_options_set(ssh_session session, enum ssh_options_e type,
session->opts.port = i & 0xffffU;
}
break;
+ case SSH_OPTIONS_AI_FAMILY:
+ if (value == NULL) {
+ session->opts.ai_family = 0;
+ ssh_set_error_invalid(session);
+ return -1;
+ } else {
+ int *x = (int *) value;
+ if (*x < 0) {
+ session->opts.ai_family = 0;
+ ssh_set_error_invalid(session);
+ return -1;
+ }
+ session->opts.ai_family = *x;
+ }
+ break;
case SSH_OPTIONS_FD:
if (value == NULL) {
session->opts.fd = SSH_INVALID_SOCKET;
@@ -1017,6 +1040,20 @@ int ssh_options_set(ssh_session session, enum ssh_options_e type,
session->opts.nodelay = (*x & 0xff) > 0 ? 1 : 0;
}
break;
@@ -292,10 +376,14 @@ index b3ecffe1..fb966fa1 100644
if (value == NULL) {
ssh_set_error_invalid(session);
diff --git a/src/session.c b/src/session.c
index 8c509699..88602b6a 100644
index 8c509699..307388e5 100644
--- a/src/session.c
+++ b/src/session.c
@@ -108,6 +108,7 @@ ssh_session ssh_new(void)
@@ -105,9 +105,11 @@ ssh_session ssh_new(void)
/* OPTIONS */
session->opts.StrictHostKeyChecking = 1;
session->opts.port = 22;
+ session->opts.ai_family = 0;
session->opts.fd = -1;
session->opts.compressionlevel = 7;
session->opts.nodelay = 0;