[SOLVED] eliminate garbage from buffer c++

vbx_wx · 03-04-2010, 01:46 PM

Code:

char retBuffer[100];

recv(sock , retBuffer ,sizeof(retBuffer) , 0);

if i send a string smaller then my buffer size retBuffer always have garbage of the end of it....what can i do to eliminate tis problem ?

troop · 03-04-2010, 01:50 PM

recv returns the number of bytes received

Code:

int num=recv(sock , retBuffer ,sizeof(retBuffer) , 0);
if(num==-1) printf("error");
else retBuffer[num]=0;

paulsm4 · 03-05-2010, 12:42 PM

Minor bug:

Code:

// Potential buffer overrun
  int num = recv(sock, retBuffer, sizeof(retBuffer), 0);
  if(num == -1) 
    printf("error");
  else 
    retBuffer[num] = 0;

Code:

// Safer version
  int num = recv(sock, retBuffer, sizeof(retBuffer) - 1, 0);
  if(num == -1) 
    printf("error");
  else 
    retBuffer[num] = 0;