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misc: Move ssh_analyze_banner to a common location.

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Don't duplicate functions!
This commit is contained in:
Andreas Schneider
2010-09-29 11:26:35 +02:00
parent 72b62d3064
commit 8b719e51cf
4 changed files with 67 additions and 126 deletions
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64
src/server.c
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@@ -43,6 +43,7 @@
#include "libssh/keys.h"
#include "libssh/dh.h"
#include "libssh/messages.h"
#include "libssh/misc.h"
#define set_status(session, status) do {\
if (session->callbacks && session->callbacks->connect_status_function) \
@@ -411,69 +412,6 @@ static int dh_handshake_server(ssh_session session) {
return 0;
}
/**
* @internal
*
* @brief Analyze the SSH banner to find out if we have a SSHv1 or SSHv2
* server.
*
* @param session The session to analyze the banner from.
* @param ssh1 The variable which is set if it is a SSHv1 server.
* @param ssh2 The variable which is set if it is a SSHv2 server.
*
* @return 0 on success, < 0 on error.
*
* @see ssh_get_banner()
*/
static int ssh_analyze_banner(ssh_session session, int *ssh1, int *ssh2) {
const char *banner = session->clientbanner;
const char *openssh;
ssh_log(session, SSH_LOG_RARE, "Analyzing banner: %s", banner);
if (strncmp(banner, "SSH-", 4) != 0) {
ssh_set_error(session, SSH_FATAL, "Protocol mismatch: %s", banner);
return -1;
}
/*
* Typical banners e.g. are:
* SSH-1.5-blah
* SSH-1.99-blah
* SSH-2.0-blah
*/
switch(banner[4]) {
case '1':
*ssh1 = 1;
if (banner[6] == '9') {
*ssh2 = 1;
} else {
*ssh2 = 0;
}
break;
case '2':
*ssh1 = 0;
*ssh2 = 1;
break;
default:
ssh_set_error(session, SSH_FATAL, "Protocol mismatch: %s", banner);
return -1;
}
openssh = strstr(banner, "OpenSSH");
if (openssh != NULL) {
int major, minor;
major = strtol(openssh + 8, (char **) NULL, 10);
minor = strtol(openssh + 10, (char **) NULL, 10);
session->openssh = SSH_VERSION_INT(major, minor, 0);
ssh_log(session, SSH_LOG_RARE,
"We are talking to an OpenSSH client version: %d.%d (%x)",
major, minor, session->openssh);
}
return 0;
}
/**
* @internal
*