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Check that there is no writing outside the string

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This commit is contained in:
Nikolas Garofil 2011-02-13 00:10:20 +01:00
parent 5aaac61f4e
commit cb544bd1f7
1 changed files with 10 additions and 13 deletions
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23
src/net_stat.cc
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@ -235,41 +235,38 @@ void print_addrs(struct text_object *obj, char *p, int p_max_size)
void print_v6addrs(struct text_object *obj, char *p, int p_max_size)
{
struct net_stat *ns = (struct net_stat *)obj->data.opaque;
char *current_char = p;
char tempaddress[INET6_ADDRSTRLEN];
struct v6addr *current_v6 = ns->v6addrs;
if (!ns)
return;
if(p_max_size == 0) return;
if( ! ns->v6addrs) {
strncpy(p, "::", p_max_size);
if(ns->v6show_nm) strcat(p, "/128");
if(ns->v6show_sc) strcat(p, "(/)");
if(ns->v6show_nm) strncat(p, "/128", p_max_size);
if(ns->v6show_sc) strncat(p, "(/)", p_max_size);
return;
}
*p=0;
while(current_v6) {
inet_ntop(AF_INET6, &(current_v6->addr), tempaddress, INET6_ADDRSTRLEN);
strcpy(current_char, tempaddress);
current_char+=strlen(current_char);
strncat(p, tempaddress, p_max_size);
//netmask
if(ns->v6show_nm) {
char netmaskstr[5]; //max 5 chars (/128 + null-terminator)
sprintf(netmaskstr, "/%u", current_v6->netmask);
strcpy(current_char, netmaskstr);
current_char += strlen(netmaskstr);
strncat(p, netmaskstr, p_max_size);
}
//scope
if(ns->v6show_sc) {
sprintf(current_char, "(%c)", current_v6->scope);
current_char += 3;
char scopestr[3];
sprintf(scopestr, "(%c)", current_v6->scope);
strncat(p, scopestr, p_max_size);
}
//next (or last) address
current_v6 = current_v6->next;
if(current_v6) {
strcpy(current_char, ", ");
current_char+=2;
} else *current_char=0;
if(current_v6) strncat(p, ", ", p_max_size);
}
}
#endif /* BUILD_IPV6 */