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CharGen
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Don't leak stack garbage

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code-review-i
Dave Vandervies 4 years ago
parent 84bf9d782f
commit 9ff9c206c9
3 changed files with 56 additions and 48 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 82
      character.c
  2. 18
      chargen.c
  3. 4
      chargen.h

82
character.c
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@ -319,7 +319,7 @@ void genBackground(){
}
}
char * genChar(char* output){
size_t genChar(char* output, size_t maxlen){
profs = 0;
languages = 0;
for(int i = 0; i <= 100; i++){
@ -333,113 +333,113 @@ char * genChar(char* output){
stats[i] = dieroll(3,6);
mods[i] = floor((stats[i]/2)-5);
}
snprintf(output, 512, "Race = %s\r\nBackground = %s\r\nClass = %s\r\nStr = %d %d\r\nDex = %d %d\r\nCon = %d %d\r\nInt = %d %d\r\nWis = %d %d\r\nCha = %d %d\r\n\r\nHP: %d\r\n", race, background, class, stats[STR], mods[STR], stats[DEX], mods[DEX], stats[CON], mods[CON], stats[INT], mods[INT], stats[WIS], mods[WIS], stats[CHA], mods[CHA], hp);
snprintf(output, maxlen, "Race = %s\r\nBackground = %s\r\nClass = %s\r\nStr = %d %d\r\nDex = %d %d\r\nCon = %d %d\r\nInt = %d %d\r\nWis = %d %d\r\nCha = %d %d\r\n\r\nHP: %d\r\n", race, background, class, stats[STR], mods[STR], stats[DEX], mods[DEX], stats[CON], mods[CON], stats[INT], mods[INT], stats[WIS], mods[WIS], stats[CHA], mods[CHA], hp);
strlcat(output,"Proficiences:\r\n",512);
strlcat(output,"Proficiences:\r\n",maxlen);
if((ATHLETICS & profs) != 0){
strlcat(output,"Athletics\r\n",512);
strlcat(output,"Athletics\r\n",maxlen);
}
if((ACROBATICS & profs) != 0){
strlcat(output,"Acrobatics\r\n",512);
strlcat(output,"Acrobatics\r\n",maxlen);
}
if((SLEIGHTOFHAND & profs) != 0){
strlcat(output,"Sleight of Hand\r\n",512);
strlcat(output,"Sleight of Hand\r\n",maxlen);
}
if((STEALTH & profs) != 0){
strlcat(output,"Stealth\r\n",512);
strlcat(output,"Stealth\r\n",maxlen);
}
if((ARCANA & profs) != 0){
strlcat(output,"Arcana\r\n",512);
strlcat(output,"Arcana\r\n",maxlen);
}
if((HISTORY & profs) != 0){
strlcat(output,"History\r\n",512);
strlcat(output,"History\r\n",maxlen);
}
if((INVESTIGATION & profs) != 0){
strlcat(output,"Investigation\r\n",512);
strlcat(output,"Investigation\r\n",maxlen);
}
if((NATURE & profs) != 0){
strlcat(output,"Nature\r\n",512);
strlcat(output,"Nature\r\n",maxlen);
}
if((RELIGION & profs) != 0){
strlcat(output,"Regligion\r\n",512);
strlcat(output,"Regligion\r\n",maxlen);
}
if((ANIMALHANDLING & profs) != 0){
strlcat(output,"Animal Handling\r\n",512);
strlcat(output,"Animal Handling\r\n",maxlen);
}
if((INSIGHT & profs) != 0){
strlcat(output,"Insight\r\n",512);
strlcat(output,"Insight\r\n",maxlen);
}
if((MEDICINE & profs) != 0){
strlcat(output,"Medicine\r\n",512);
strlcat(output,"Medicine\r\n",maxlen);
}
if((PERCEPTION & profs) != 0){
strlcat(output,"Perception\r\n",512);
strlcat(output,"Perception\r\n",maxlen);
}
if((SURVIVAL & profs) != 0){
strlcat(output,"Survival\r\n",512);
strlcat(output,"Survival\r\n",maxlen);
}
if((DECEPTION & profs) != 0){
strlcat(output,"Deception\r\n",512);
strlcat(output,"Deception\r\n",maxlen);
}
if((INTIMIDATION & profs) != 0){
strlcat(output,"Intimidation\r\n",512);
strlcat(output,"Intimidation\r\n",maxlen);
}
if((PERFORMANCE & profs) != 0){
strlcat(output,"Performance\r\n",512);
strlcat(output,"Performance\r\n",maxlen);
}
if((PERSUASION & profs) != 0){
strlcat(output,"Persuaion\r\n",512);
strlcat(output,"Persuaion\r\n",maxlen);
}
strlcat(output,"\r\nLanguages:\r\nCommon\r\n",512);
strlcat(output,"\r\nLanguages:\r\nCommon\r\n",maxlen);
if((ABYSSAL & languages) != 0){
strlcat(output,"Abyssal\r\n",512);
strlcat(output,"Abyssal\r\n",maxlen);
}
if((CELESTIAL & languages) != 0){
strlcat(output,"Celestial\r\n",512);
strlcat(output,"Celestial\r\n",maxlen);
}
if((DRACONIC & languages) != 0){
strlcat(output,"Draconic\r\n",512);
strlcat(output,"Draconic\r\n",maxlen);
}
if((DEEPSPEECH & languages) != 0){
strlcat(output,"Deep Speech\r\n",512);
strlcat(output,"Deep Speech\r\n",maxlen);
}
if((INFERNAL & languages) != 0){
strlcat(output,"Infernal\r\n",512);
strlcat(output,"Infernal\r\n",maxlen);
}
if((PRIMORDIAL & languages) != 0){
strlcat(output,"Primordial\r\n",512);
strlcat(output,"Primordial\r\n",maxlen);
}
if((SYLVAN & languages) != 0){
strlcat(output,"Sylvan\r\n",512);
strlcat(output,"Sylvan\r\n",maxlen);
}
if((UNDERCOMMON & languages) != 0){
strlcat(output,"Undercommon\r\n",512);
strlcat(output,"Undercommon\r\n",maxlen);
}
if((DWARVISH & languages) != 0){
strlcat(output,"Dwarvish\r\n",512);
strlcat(output,"Dwarvish\r\n",maxlen);
}
if((ELVISH & languages) != 0){
strlcat(output,"Elvish\r\n",512);
strlcat(output,"Elvish\r\n",maxlen);
}
if((GIANT & languages) != 0){
strlcat(output,"Giant\r\n",512);
strlcat(output,"Giant\r\n",maxlen);
}
if((GNOMISH & languages) != 0){
strlcat(output,"Gnome\r\n",512);
strlcat(output,"Gnome\r\n",maxlen);
}
if((GOBLIN & languages) != 0){
strlcat(output,"Goblin\r\n",512);
strlcat(output,"Goblin\r\n",maxlen);
}
if((HALFLISH & languages) != 0){
strlcat(output,"Halfling\r\n",512);
strlcat(output,"Halfling\r\n",maxlen);
}
if((ORC & languages) != 0){
strlcat(output,"Orcish\r\n",512);
strlcat(output,"Orcish\r\n",maxlen);
}
strlcat(output,"\r\nOther Profs: ",512);
strlcat(output,otherprofs,512);
strlcat(output,"\r\n",512);
return output;
strlcat(output,"\r\nOther Profs: ",maxlen);
strlcat(output,otherprofs,maxlen);
strlcat(output,"\r\n",maxlen);
return strlen(output);
}

18
chargen.c
Unescape View File

@ -13,6 +13,11 @@
#include "chargen.h"
enum {
TCP_MAXLEN = 1024,
UDP_MAXLEN = 512,
};
void usage_and_die(const char *myname, const char *fmt, ...)
{
if (fmt)
@ -246,9 +251,9 @@ int main(int argc, char **argv)
printf("Responding to packet from %s:%s...\n", hbuf, sbuf);
//rval = sendto(s, "chargen data\r\n", 14, 0, sa, len);
char character[512];
genChar(character);
rval = sendto(s, character, 512, 0, sa, len);
char character[UDP_MAXLEN];
size_t datalen = genChar(character, sizeof character);
rval = sendto(s, character, datalen, 0, sa, len);
if (rval == -1)
warn("sendto");
}
@ -283,9 +288,10 @@ int main(int argc, char **argv)
printf("WTF? i=%u num_stream=%u stream_fds[i]=%d s=%d\n", i, num_stream, stream_fds[i], s);
continue;
}
char character[512];
genChar(character);
if (write(s, character, 512) == -1)
char character[TCP_MAXLEN];
size_t datalen = genChar(character, sizeof character);
/* TODO: Detect short writes and save the rest of the buffer for later */
if (write(s, character, datalen) == -1)
{
warn("write");
printf("Closing stream connection\n");

4
chargen.h
Unescape View File

@ -1,6 +1,8 @@
#ifndef H_CHARGEN
#define H_CHARGEN
char* genChar();
#include <stddef.h>
size_t genChar(char *, size_t);
#endif

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