remove call_getopt, fix several buffer overruns possible due to use of fixed size buffers

git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@165 f882894a-f735-0410-b71e-b25c423dba1c

1 files changed, 55 insertions, 92 deletions

diff --git a/plugins/check_smtp.c b/plugins/check_smtp.c
index 4e5d3c8..5afb694 100644
--- a/plugins/check_smtp.c
+++ b/plugins/check_smtp.c
@@ -61,9 +61,7 @@
 #define SMTP_QUIT       "QUIT\r\n"
 
 int process_arguments (int, char **);
-int call_getopt (int, char **);
 int validate_arguments (void);
-int check_disk (int usp, int free_disk);
 void print_help (void);
 void print_usage (void);
 
@@ -80,35 +78,28 @@ int verbose = FALSE;
 int
 main (int argc, char **argv)
 {
-        int sd;
+        int sd, c;
         int result;
         char buffer[MAX_INPUT_BUFFER] = "";
-        char helocmd[255] = SMTP_HELO ;
-        char from_str[255] = SMTP_DUMMYCMD ;
-        char myhostname[248];
-        
+        char *from_str = NULL;
+        char *helocmd = NULL;
 
         if (process_arguments (argc, argv) != OK)
                 usage ("Invalid command arguments supplied\n");
 
         /* initialize the HELO command with the localhostname */
-        gethostname(myhostname, sizeof(myhostname));
-        strcat(helocmd, myhostname);
-        strcat(helocmd, "\r\n");
+#ifndef HOST_MAX_BYTES
+#define HOST_MAX_BYTES 255
+#endif
+        helocmd = malloc (HOST_MAX_BYTES);
+        gethostname(helocmd, HOST_MAX_BYTES);
+        asprintf (&helocmd, "%s%s%s", SMTP_HELO, helocmd, "\r\n");
 
         /* initialize the MAIL command with optional FROM command  */
-        if (from_arg) {
-                strcat(from_str, "FROM: ");
-                strcat(from_str, from_arg);
-        }
-        /* terminate line with a CRLF */
-        strcat(from_str, "\r\n");
-                
-        if (verbose == TRUE){
-                printf ("FROMCMD: %s\n", from_str);
-        }
+        asprintf (&from_str, "%sFROM: %s%s", SMTP_DUMMYCMD, from_arg, "\r\n");
 
-        
+        if (verbose == TRUE)
+                printf ("FROMCMD: %s\n", from_str);
         
         /* initialize alarm signal handling */
         signal (SIGALRM, socket_timeout_alarm_handler);
@@ -170,21 +161,27 @@ main (int argc, char **argv)
                 }
 
                 /* close the connection */
+
                 /* first send the HELO command */
-                send(sd,helocmd,strlen(helocmd),0);
+                send(sd, helocmd, strlen(helocmd), 0);
+
                 /* allow for response to helo command to reach us */
-                recv(sd,buffer,MAX_INPUT_BUFFER-1,0);
+                recv(sd, buffer, MAX_INPUT_BUFFER-1, 0);
                                 
 #ifdef SMTP_USE_DUMMYCMD
-                send(sd,from_str,strlen(from_str),0);
+                send(sd, from_str, strlen(from_str), 0);
+
                 /* allow for response to DUMMYCMD to reach us */
-                recv(sd,buffer,MAX_INPUT_BUFFER-1,0);
+                recv(sd, buffer, MAX_INPUT_BUFFER-1, 0);
+
                 if (verbose == TRUE) 
-                        printf("DUMMYCMD: %s\n%s\n",from_str,buffer);           
+                        printf("DUMMYCMD: %s\n%s\n",from_str,buffer);
 #endif /* SMTP_USE_DUMMYCMD */
 
-                /* finally close the connection */
+                /* tell the server we're done */
                 send (sd, SMTP_QUIT, strlen (SMTP_QUIT), 0);
+
+                /* finally close the connection */
                 close (sd);
         }
 
@@ -205,55 +202,6 @@ process_arguments (int argc, char **argv)
 {
         int c;
 
-        if (argc < 2)
-                return ERROR;
-
-        for (c = 1; c < argc; c++) {
-                if (strcmp ("-to", argv[c]) == 0)
-                        strcpy (argv[c], "-t");
-                else if (strcmp ("-wt", argv[c]) == 0)
-                        strcpy (argv[c], "-w");
-                else if (strcmp ("-ct", argv[c]) == 0)
-                        strcpy (argv[c], "-c");
-        }
-
-
-
-        c = 0;
-        while ((c += (call_getopt (argc - c, &argv[c]))) < argc) {
-
-                if (is_option (argv[c]))
-                        continue;
-
-                if (server_address == NULL) {
-                        if (is_host (argv[c])) {
-                                server_address = argv[c];
-                        }
-                        else {
-                                usage ("Invalid host name");
-                        }
-                }
-        }
-
-        if (server_address == NULL)
-                server_address = strscpy (NULL, "127.0.0.1");
-
-        if (server_expect == NULL)
-                server_expect = strscpy (NULL, SMTP_EXPECT);
-
-        return validate_arguments ();
-}
-
-
-
-
-
-
-int
-call_getopt (int argc, char **argv)
-{
-        int c, i = 0;
-
 #ifdef HAVE_GETOPT_H
         int option_index = 0;
         static struct option long_options[] = {
@@ -270,6 +218,18 @@ call_getopt (int argc, char **argv)
         };
 #endif
 
+        if (argc < 2)
+                return ERROR;
+
+        for (c = 1; c < argc; c++) {
+                if (strcmp ("-to", argv[c]) == 0)
+                        strcpy (argv[c], "-t");
+                else if (strcmp ("-wt", argv[c]) == 0)
+                        strcpy (argv[c], "-w");
+                else if (strcmp ("-ct", argv[c]) == 0)
+                        strcpy (argv[c], "-c");
+        }
+
         while (1) {
 #ifdef HAVE_GETOPT_H
                 c =
@@ -278,24 +238,10 @@ call_getopt (int argc, char **argv)
 #else
                 c = getopt (argc, argv, "+?hVvt:p:f:e:c:w:H:");
 #endif
-
-                i++;
-
-                if (c == -1 || c == EOF || c == 1)
+                if (c == -1 || c == EOF)
                         break;
 
                 switch (c) {
-                case 't':
-                case 'p':
-                case 'e':
-                case 'f':
-                case 'c':
-                case 'w':
-                case 'H':
-                        i++;
-                }
-
-                switch (c) {
                 case 'H':                                                                       /* hostname */
                         if (is_host (optarg)) {
                                 server_address = optarg;
@@ -357,7 +303,24 @@ call_getopt (int argc, char **argv)
                         usage ("Invalid argument\n");
                 }
         }
-        return i;
+
+        c = optind;
+        if (server_address == NULL) {
+                if (argv[c]) {
+                        if (is_host (argv[c]))
+                                server_address = argv[c];
+                        else
+                                usage ("Invalid host name");
+                }
+                else {
+                        asprintf (&server_address, "127.0.0.1");
+                }
+        }
+
+        if (server_expect == NULL)
+                asprintf (&server_expect, SMTP_EXPECT);
+
+        return validate_arguments ();
 }