Use more the EXTRACT_U_1() macro (40/n)

[tcpdump] / print-telnet.c

diff --git a/print-telnet.c b/print-telnet.c
index e01e91b865c3e256f82d245b85b4532dd4e7a07c..e3782177a9f4c0534bb3759030479cf37ec51e74 100644 (file)
--- a/print-telnet.c
+++ b/print-telnet.c
@@ -45,6 +45,8 @@
  *      are preserved in all copies.
  */
 
  *      are preserved in all copies.
  */
 

+/* \summary: Telnet option printer */
+

 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif


@@ -54,6 +56,9 @@
 #include <stdio.h>
 
 #include "netdissect.h"
 #include <stdio.h>
 
 #include "netdissect.h"

+#include "extract.h"
+
+static const char tstr[] = " [|telnet]";

 
 #define TELCMDS
 #define TELOPTS
 
 #define TELCMDS
 #define TELOPTS


@@ -87,7 +92,7 @@
 #define SYNCH  242             /* for telfunc calls */
 
 #ifdef TELCMDS
 #define SYNCH  242             /* for telfunc calls */
 
 #ifdef TELCMDS

-const char *telcmds[] = {
+static const char *telcmds[] = {

        "EOF", "SUSP", "ABORT", "EOR",
        "SE", "NOP", "DMARK", "BRK", "IP", "AO", "AYT", "EC",
        "EL", "GA", "SB", "WILL", "WONT", "DO", "DONT", "IAC", 0,
        "EOF", "SUSP", "ABORT", "EOR",
        "SE", "NOP", "DMARK", "BRK", "IP", "AO", "AYT", "EC",
        "EL", "GA", "SB", "WILL", "WONT", "DO", "DONT", "IAC", 0,


@@ -148,7 +153,7 @@ extern char *telcmds[];
 
 #define        NTELOPTS        (1+TELOPT_NEW_ENVIRON)
 #ifdef TELOPTS
 
 #define        NTELOPTS        (1+TELOPT_NEW_ENVIRON)
 #ifdef TELOPTS

-const char *telopts[NTELOPTS+1] = {
+static const char *telopts[NTELOPTS+1] = {

        "BINARY", "ECHO", "RCP", "SUPPRESS GO AHEAD", "NAME",
        "STATUS", "TIMING MARK", "RCTE", "NAOL", "NAOP",
        "NAOCRD", "NAOHTS", "NAOHTD", "NAOFFD", "NAOVTS",
        "BINARY", "ECHO", "RCP", "SUPPRESS GO AHEAD", "NAME",
        "STATUS", "TIMING MARK", "RCTE", "NAOL", "NAOP",
        "NAOCRD", "NAOHTS", "NAOHTD", "NAOFFD", "NAOVTS",


@@ -433,10 +438,12 @@ telnet_parse(netdissect_options *ndo, const u_char *sp, u_int length, int print)
                /* IAC SB .... IAC SE */
                p = sp;
                while (length > (u_int)(p + 1 - sp)) {
                /* IAC SB .... IAC SE */
                p = sp;
                while (length > (u_int)(p + 1 - sp)) {

+                       ND_TCHECK_2(p);

                        if (p[0] == IAC && p[1] == SE)
                                break;
                        p++;
                }
                        if (p[0] == IAC && p[1] == SE)
                                break;
                        p++;
                }

+               ND_TCHECK(*p);

                if (*p != IAC)
                        goto pktend;
 
                if (*p != IAC)
                        goto pktend;
 


@@ -493,7 +500,7 @@ done:
        return sp - osp;
 
 trunc:
        return sp - osp;
 
 trunc:

-       ND_PRINT((ndo, "[|telnet]"));
+       ND_PRINT((ndo, "%s", tstr));

 pktend:
        return -1;
 #undef FETCH
 pktend:
        return -1;
 #undef FETCH


@@ -508,7 +515,8 @@ telnet_print(netdissect_options *ndo, const u_char *sp, u_int length)
 
        osp = sp;
 
 
        osp = sp;
 

-       while (length > 0 && *sp == IAC) {
+       ND_TCHECK(*sp);
+       while (length > 0 && EXTRACT_U_1(sp) == IAC) {

                /*
                 * Parse the Telnet command without printing it,
                 * to determine its length.
                /*
                 * Parse the Telnet command without printing it,
                 * to determine its length.


@@ -536,6 +544,7 @@ telnet_print(netdissect_options *ndo, const u_char *sp, u_int length)
 
                sp += l;
                length -= l;
 
                sp += l;
                length -= l;

+               ND_TCHECK(*sp);

        }
        if (!first) {
                if (ndo->ndo_Xflag && 2 < ndo->ndo_vflag)
        }
        if (!first) {
                if (ndo->ndo_Xflag && 2 < ndo->ndo_vflag)


@@ -543,4 +552,7 @@ telnet_print(netdissect_options *ndo, const u_char *sp, u_int length)
                else
                        ND_PRINT((ndo, "]"));
        }
                else
                        ND_PRINT((ndo, "]"));
        }

+       return;
+trunc:
+       ND_PRINT((ndo, "%s", tstr));

 }
 }