static int parse(int c, char **argv, int argc,
const struct ebt_u_entry *entry, unsigned int *flags,
struct ebt_entry_match **match)
{
struct ebt_among_info *info =
(struct ebt_among_info *) (*match)->data;
struct ebt_mac_wormhash *wh;
struct ebt_entry_match *h;
int new_size, old_size;
switch (c) {
case AMONG_DST:
case AMONG_SRC:
if (c == AMONG_DST) {
ebt_check_option2(flags, OPT_DST);
} else {
ebt_check_option2(flags, OPT_SRC);
}
if (ebt_check_inverse2(optarg)) {
if (c == AMONG_DST)
info->bitmask |= EBT_AMONG_DST_NEG;
else
info->bitmask |= EBT_AMONG_SRC_NEG;
}
wh = create_wormhash(optarg);
if (ebt_errormsg[0] != '\0')
break;
old_size = sizeof(struct ebt_entry_match) + (**match).match_size;
h = malloc((new_size = old_size + ebt_mac_wormhash_size(wh)));
if (!h)
ebt_print_memory();
memcpy(h, *match, old_size);
memcpy((char *) h + old_size, wh, ebt_mac_wormhash_size(wh));
h->match_size = new_size - sizeof(struct ebt_entry_match);
info = (struct ebt_among_info *) h->data;
if (c == AMONG_DST) {
info->wh_dst_ofs =
old_size - sizeof(struct ebt_entry_match);
} else {
info->wh_src_ofs =
old_size - sizeof(struct ebt_entry_match);
}
free(*match);
*match = h;
free(wh);
break;
default:
return 0;
}
return 1;
}
static int parse(int c, char **argv, int argc,
const struct ebt_u_entry *entry, unsigned int *flags,
struct ebt_entry_match **match)
{
struct ebt_among_info *info =
(struct ebt_among_info *) (*match)->data;
struct ebt_mac_wormhash *wh;
struct ebt_entry_match *h;
int new_size;
long flen;
int fd;
switch (c) {
case AMONG_DST_F:
case AMONG_SRC_F:
case AMONG_DST:
case AMONG_SRC:
if (c == AMONG_DST || c == AMONG_DST_F) {
ebt_check_option2(flags, OPT_DST);
} else {
ebt_check_option2(flags, OPT_SRC);
}
if (ebt_check_inverse2(optarg)) {
if (c == AMONG_DST || c == AMONG_DST_F)
info->bitmask |= EBT_AMONG_DST_NEG;
else
info->bitmask |= EBT_AMONG_SRC_NEG;
}
if (c == AMONG_DST_F || c == AMONG_SRC_F) {
struct stat stats;
if ((fd = open(optarg, O_RDONLY)) == -1)
ebt_print_error("Couldn't open file '%s'", optarg);
fstat(fd, &stats);
flen = stats.st_size;
/* use mmap because the file will probably be big */
optarg = mmap(0, flen, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0);
if (optarg == MAP_FAILED)
ebt_print_error("Couldn't map file to memory");
if (optarg[flen-1] != '\n')
ebt_print_error("File should end with a newline");
if (strchr(optarg, '\n') != optarg+flen-1)
ebt_print_error("File should only contain one line");
optarg[flen-1] = '\0';
if (ebt_errormsg[0] != '\0') {
munmap(argv, flen);
close(fd);
exit(-1);
}
}
wh = create_wormhash(optarg);
if (ebt_errormsg[0] != '\0')
break;
new_size = old_size+ebt_mac_wormhash_size(wh);
h = malloc(sizeof(struct ebt_entry_match)+EBT_ALIGN(new_size));
if (!h)
ebt_print_memory();
memcpy(h, *match, old_size+sizeof(struct ebt_entry_match));
memcpy((char *)h+old_size+sizeof(struct ebt_entry_match), wh,
ebt_mac_wormhash_size(wh));
h->match_size = EBT_ALIGN(new_size);
info = (struct ebt_among_info *) h->data;
if (c == AMONG_DST) {
info->wh_dst_ofs = old_size;
} else {
info->wh_src_ofs = old_size;
}
old_size = new_size;
free(*match);
*match = h;
free(wh);
if (c == AMONG_DST_F || c == AMONG_SRC_F) {
munmap(argv, flen);
close(fd);
}
break;
default:
return 0;
}
return 1;
}
