1 files changed, 34 insertions, 42 deletions

diff --git a/plugins/check_ssh.c b/plugins/check_ssh.c
index b12cda1..42a88cf 100644
--- a/plugins/check_ssh.c
+++ b/plugins/check_ssh.c
@@ -49,7 +49,7 @@ static char *remote_version = NULL;
 static char *remote_protocol = NULL;
 static bool verbose = false;
 
-static int process_arguments(int, char **);
+static int process_arguments(int /*argc*/, char ** /*argv*/);
 static int validate_arguments(void);
 static void print_help(void);
 void print_usage(void);
@@ -57,8 +57,6 @@ void print_usage(void);
 static int ssh_connect(char *haddr, int hport, char *remote_version, char *remote_protocol);
 
 int main(int argc, char **argv) {
-        int result = STATE_UNKNOWN;
-
         setlocale(LC_ALL, "");
         bindtextdomain(PACKAGE, LOCALEDIR);
         textdomain(PACKAGE);
@@ -75,7 +73,7 @@ int main(int argc, char **argv) {
         alarm(socket_timeout);
 
         /* ssh_connect exits if error is found */
-        result = ssh_connect(server_name, port, remote_version, remote_protocol);
+        int result = ssh_connect(server_name, port, remote_version, remote_protocol);
 
         alarm(0);
 
@@ -84,9 +82,6 @@ int main(int argc, char **argv) {
 
 /* process command-line arguments */
 int process_arguments(int argc, char **argv) {
-        int c;
-
-        int option = 0;
         static struct option longopts[] = {{"help", no_argument, 0, 'h'},
                                                                            {"version", no_argument, 0, 'V'},
                                                                            {"host", required_argument, 0, 'H'}, /* backward compatibility */
@@ -103,17 +98,19 @@ int process_arguments(int argc, char **argv) {
         if (argc < 2)
                 return ERROR;
 
-        for (c = 1; c < argc; c++)
-                if (strcmp("-to", argv[c]) == 0)
-                        strcpy(argv[c], "-t");
+        for (int i = 1; i < argc; i++)
+                if (strcmp("-to", argv[i]) == 0)
+                        strcpy(argv[i], "-t");
 
-        while (1) {
-                c = getopt_long(argc, argv, "+Vhv46t:r:H:p:P:", longopts, &option);
+        int option_char;
+        while (true) {
+                int option = 0;
+                option_char = getopt_long(argc, argv, "+Vhv46t:r:H:p:P:", longopts, &option);
 
-                if (c == -1 || c == EOF)
+                if (option_char == -1 || option_char == EOF)
                         break;
 
-                switch (c) {
+                switch (option_char) {
                 case '?': /* help */
                         usage5();
                 case 'V': /* version */
@@ -161,16 +158,16 @@ int process_arguments(int argc, char **argv) {
                 }
         }
 
-        c = optind;
-        if (server_name == NULL && c < argc) {
-                if (is_host(argv[c])) {
-                        server_name = argv[c++];
+        option_char = optind;
+        if (server_name == NULL && option_char < argc) {
+                if (is_host(argv[option_char])) {
+                        server_name = argv[option_char++];
                 }
         }
 
-        if (port == -1 && c < argc) {
-                if (is_intpos(argv[c])) {
-                        port = atoi(argv[c++]);
+        if (port == -1 && option_char < argc) {
+                if (is_intpos(argv[option_char])) {
+                        port = atoi(argv[option_char++]);
                 } else {
                         print_usage();
                         exit(STATE_UNKNOWN);
@@ -195,34 +192,27 @@ int validate_arguments(void) {
  *-----------------------------------------------------------------------*/
 
 int ssh_connect(char *haddr, int hport, char *remote_version, char *remote_protocol) {
-        int sd;
-        int result;
-        int len = 0;
-        ssize_t recv_ret = 0;
-        char *version_control_string = NULL;
-        char *buffer = NULL;
-        char *ssh_proto = NULL;
-        char *ssh_server = NULL;
-        static char *rev_no = VERSION;
         struct timeval tv;
-
         gettimeofday(&tv, NULL);
 
-        result = my_tcp_connect(haddr, hport, &sd);
+        int socket;
+        int result = my_tcp_connect(haddr, hport, &socket);
 
         if (result != STATE_OK)
                 return result;
 
         char *output = (char *)calloc(BUFF_SZ + 1, sizeof(char));
-
+        char *buffer = NULL;
+        ssize_t recv_ret = 0;
+        char *version_control_string = NULL;
         ssize_t byte_offset = 0;
-
-        while ((version_control_string == NULL) && (recv_ret = recv(sd, output + byte_offset, BUFF_SZ - byte_offset, 0) > 0)) {
+        while ((version_control_string == NULL) && (recv_ret = recv(socket, output + byte_offset, BUFF_SZ - byte_offset, 0) > 0)) {
 
                 if (strchr(output, '\n')) { /* we've got at least one full line, start parsing*/
                         byte_offset = 0;
 
                         char *index = NULL;
+                        int len = 0;
                         while ((index = strchr(output + byte_offset, '\n')) != NULL) {
                                 /*Partition the buffer so that this line is a separate string,
                                  * by replacing the newline with NUL*/
@@ -241,7 +231,7 @@ int ssh_connect(char *haddr, int hport, char *remote_version, char *remote_proto
 
                         if (version_control_string == NULL) {
                                 /* move unconsumed data to beginning of buffer, null rest */
-                                memmove((void *)output, (void *)output + byte_offset + 1, BUFF_SZ - len + 1);
+                                memmove((void *)output, (void *)(output + byte_offset + 1), BUFF_SZ - len + 1);
                                 memset(output + byte_offset + 1, 0, BUFF_SZ - byte_offset + 1);
 
                                 /*start reading from end of current line chunk on next recv*/
@@ -271,7 +261,8 @@ int ssh_connect(char *haddr, int hport, char *remote_version, char *remote_proto
         strip(version_control_string);
         if (verbose)
                 printf("%s\n", version_control_string);
-        ssh_proto = version_control_string + 4;
+
+        char *ssh_proto = version_control_string + 4;
 
         /*
          * We assume the protoversion is of the form Major.Minor, although
@@ -289,7 +280,7 @@ int ssh_connect(char *haddr, int hport, char *remote_version, char *remote_proto
          * "1.x" (e.g., "1.5" or "1.3")."
          *              - RFC 4253:5
          */
-        ssh_server = ssh_proto + strspn(ssh_proto, "0123456789.") + 1; /* (+1 for the '-' separating protoversion from softwareversion) */
+        char *ssh_server = ssh_proto + strspn(ssh_proto, "0123456789.") + 1; /* (+1 for the '-' separating protoversion from softwareversion) */
 
         /* If there's a space in the version string, whatever's after the space is a comment
          * (which is NOT part of the server name/version)*/
@@ -303,14 +294,15 @@ int ssh_connect(char *haddr, int hport, char *remote_version, char *remote_proto
         }
         ssh_proto[strspn(ssh_proto, "0123456789. ")] = 0;
 
+        static char *rev_no = VERSION;
         xasprintf(&buffer, "SSH-%s-check_ssh_%s\r\n", ssh_proto, rev_no);
-        send(sd, buffer, strlen(buffer), MSG_DONTWAIT);
+        send(socket, buffer, strlen(buffer), MSG_DONTWAIT);
         if (verbose)
                 printf("%s\n", buffer);
 
         if (remote_version && strcmp(remote_version, ssh_server)) {
                 printf(_("SSH CRITICAL - %s (protocol %s) version mismatch, expected '%s'\n"), ssh_server, ssh_proto, remote_version);
-                close(sd);
+                close(socket);
                 exit(STATE_CRITICAL);
         }
 
@@ -318,13 +310,13 @@ int ssh_connect(char *haddr, int hport, char *remote_version, char *remote_proto
         if (remote_protocol && strcmp(remote_protocol, ssh_proto)) {
                 printf(_("SSH CRITICAL - %s (protocol %s) protocol version mismatch, expected '%s' | %s\n"), ssh_server, ssh_proto, remote_protocol,
                            fperfdata("time", elapsed_time, "s", false, 0, false, 0, true, 0, true, (int)socket_timeout));
-                close(sd);
+                close(socket);
                 exit(STATE_CRITICAL);
         }
 
         printf(_("SSH OK - %s (protocol %s) | %s\n"), ssh_server, ssh_proto,
                    fperfdata("time", elapsed_time, "s", false, 0, false, 0, true, 0, true, (int)socket_timeout));
-        close(sd);
+        close(socket);
         exit(STATE_OK);
 }