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Save hosts in lowercase and validate

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#100
This commit is contained in:
ruti 2024-08-22 17:09:00 +03:00
parent a6c5173d9c
commit 8ad4c22b30
1 changed files with 23 additions and 0 deletions
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23
main.c
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@ -242,17 +242,39 @@ char *ftob(const char *str, ssize_t *sl)
}
static inline int lower_char(char *cl)
{
char c = *cl;
if (c < 'A') {
if (c > '9' || c < '-')
return -1;
}
else if (c < 'a') {
if (c > 'Z')
return -1;
*cl = c + 32;
}
else if (c > 'z')
return -1;
return 0;
}
struct mphdr *parse_hosts(char *buffer, size_t size)
{
struct mphdr *hdr = mem_pool(1);
if (!hdr) {
return 0;
}
size_t num = 0;
char *end = buffer + size;
char *e = buffer, *s = buffer;
for (; e <= end; e++) {
if (e != end && *e != ' ' && *e != '\n' && *e != '\r') {
if (lower_char(e)) {
LOG(LOG_E, "invalid host: num: %zd (%.*s)\n", num + 1, (int )(e - s + 1), s);
}
continue;
}
if (s == e) {
@ -263,6 +285,7 @@ struct mphdr *parse_hosts(char *buffer, size_t size)
free(hdr);
return 0;
}
num++;
s = e + 1;
}
return hdr;