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#ifndef _LIBIPT_SET_H
#define _LIBIPT_SET_H
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <errno.h>
#ifdef DEBUG
#define DEBUGP(x, args...) fprintf(stderr, x, ## args)
#else
#define DEBUGP(x, args...)
#endif
static void
parse_bindings(const char *opt_arg, struct ipt_set_info *info)
{
char *saved = strdup(opt_arg);
char *ptr, *tmp = saved;
int i = 0;
while (i < (IP_SET_MAX_BINDINGS - 1) && tmp != NULL) {
ptr = strsep(&tmp, ",");
if (strncmp(ptr, "src", 3) == 0)
info->flags[i++] |= IPSET_SRC;
else if (strncmp(ptr, "dst", 3) == 0)
info->flags[i++] |= IPSET_DST;
else
xtables_error(PARAMETER_PROBLEM,
"You must spefify (the comma separated list of) 'src' or 'dst'.");
}
if (tmp)
xtables_error(PARAMETER_PROBLEM,
"Can't follow bindings deeper than %i.",
IP_SET_MAX_BINDINGS - 1);
free(saved);
}
static int get_version(unsigned *version)
{
int res, sockfd = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
struct ip_set_req_version req_version;
socklen_t size = sizeof(req_version);
if (sockfd < 0)
xtables_error(OTHER_PROBLEM,
"Can't open socket to ipset.\n");
req_version.op = IP_SET_OP_VERSION;
res = getsockopt(sockfd, SOL_IP, SO_IP_SET, &req_version, &size);
if (res != 0)
xtables_error(OTHER_PROBLEM,
"Kernel module ip_set is not loaded in.\n");
*version = req_version.version;
return sockfd;
}
static void get_set_byname(const char *setname, struct ipt_set_info *info)
{
struct ip_set_req_get_set req;
socklen_t size = sizeof(struct ip_set_req_get_set);
int res, sockfd;
sockfd = get_version(&req.version);
req.op = IP_SET_OP_GET_BYNAME;
strncpy(req.set.name, setname, IP_SET_MAXNAMELEN);
req.set.name[IP_SET_MAXNAMELEN - 1] = '\0';
res = getsockopt(sockfd, SOL_IP, SO_IP_SET, &req, &size);
close(sockfd);
if (res != 0)
xtables_error(OTHER_PROBLEM,
"Problem when communicating with ipset, errno=%d.\n",
errno);
if (size != sizeof(struct ip_set_req_get_set))
xtables_error(OTHER_PROBLEM,
"Incorrect return size from kernel during ipset lookup, "
"(want %zu, got %zu)\n",
sizeof(struct ip_set_req_get_set), (size_t)size);
if (req.set.index == IP_SET_INVALID_ID)
xtables_error(PARAMETER_PROBLEM,
"Set %s doesn't exist.\n", setname);
info->index = req.set.index;
}
static void get_set_byid(char * setname, ip_set_id_t idx)
{
struct ip_set_req_get_set req;
socklen_t size = sizeof(struct ip_set_req_get_set);
int res, sockfd;
sockfd = get_version(&req.version);
req.op = IP_SET_OP_GET_BYINDEX;
req.set.index = idx;
res = getsockopt(sockfd, SOL_IP, SO_IP_SET, &req, &size);
close(sockfd);
if (res != 0)
xtables_error(OTHER_PROBLEM,
"Problem when communicating with ipset, errno=%d.\n",
errno);
if (size != sizeof(struct ip_set_req_get_set))
xtables_error(OTHER_PROBLEM,
"Incorrect return size from kernel during ipset lookup, "
"(want %zu, got %zu)\n",
sizeof(struct ip_set_req_get_set), (size_t)size);
if (req.set.name[0] == '\0')
xtables_error(PARAMETER_PROBLEM,
"Set id %i in kernel doesn't exist.\n", idx);
strncpy(setname, req.set.name, IP_SET_MAXNAMELEN);
}
#endif /*_LIBIPT_SET_H*/
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