This commit is contained in:
ruti 2024-12-17 05:27:34 +03:00
parent c86ba13937
commit 784d14a663
5 changed files with 162 additions and 12 deletions

View File

@ -116,6 +116,7 @@ static int cache_add(const struct sockaddr_ina *dst, int m)
return 0;
}
static bool check_l34(struct desync_params *dp, int st, const struct sockaddr_in6 *dst);
int connect_hook(struct poolhd *pool, struct eval *val,
const struct sockaddr_ina *dst, int next)
@ -188,7 +189,26 @@ static bool check_host(
return 0;
}
static bool check_ip(
struct mphdr *ipset, const struct sockaddr_in6 *addr)
{
const struct sockaddr_ina *dst = (const struct sockaddr_ina *)addr;
int len = sizeof(dst->in.sin_addr);
char *data = (char *)&dst->in.sin_addr;
if (dst->sa.sa_family == AF_INET6) {
len = sizeof(dst->in6.sin6_addr);
data = (char *)&dst->in6.sin6_addr;
}
if (mem_get(ipset, data, len * 8)) {
return 1;
}
return 0;
}
static bool check_proto_tcp(int proto, const char *buffer, ssize_t n)
{
if (!(proto & ~IS_IPV4)) {
@ -206,12 +226,12 @@ static bool check_proto_tcp(int proto, const char *buffer, ssize_t n)
}
static bool check_l34(int proto, const uint16_t *pf, int st, const struct sockaddr_in6 *dst)
static bool check_l34(struct desync_params *dp, int st, const struct sockaddr_in6 *dst)
{
if ((proto & IS_UDP) && (st != SOCK_DGRAM)) {
if ((dp->proto & IS_UDP) && (st != SOCK_DGRAM)) {
return 0;
}
if (proto & IS_IPV4) {
if (dp->proto & IS_IPV4) {
static const char *pat = "\0\0\0\0\0\0\0\0\0\0\xff\xff";
if (dst->sin6_family != AF_INET
@ -219,8 +239,11 @@ static bool check_l34(int proto, const uint16_t *pf, int st, const struct sockad
return 0;
}
}
if (pf[0] &&
(dst->sin6_port < pf[0] || dst->sin6_port > pf[1])) {
if (dp->pf[0] &&
(dst->sin6_port < dp->pf[0] || dst->sin6_port > dp->pf[1])) {
return 0;
}
if (dp->ipset && !check_ip(dp->ipset, dst)) {
return 0;
}
return 1;
@ -340,8 +363,8 @@ static int setup_conn(struct eval *client, const char *buffer, ssize_t n)
if (!m) for (; m < params.dp_count; m++) {
struct desync_params *dp = &params.dp[m];
if (!dp->detect
&& (check_l34(dp->proto, dp->pf, SOCK_STREAM, &client->pair->in6)
&& check_proto_tcp(dp->proto, buffer, n))
&& check_l34(dp, SOCK_STREAM, &client->pair->in6)
&& check_proto_tcp(dp->proto, buffer, n)
&& (!dp->hosts || check_host(dp->hosts, buffer, n))) {
break;
}
@ -544,7 +567,7 @@ ssize_t udp_hook(struct eval *val,
for (; m < params.dp_count; m++) {
struct desync_params *dp = &params.dp[m];
if (!dp->detect
&& check_l34(dp->proto, dp->pf, SOCK_DGRAM, &dst->in6)) {
&& check_l34(dp, SOCK_DGRAM, &dst->in6)) {
break;
}
}

94
main.c
View File

@ -84,6 +84,7 @@ const static char help_text[] = {
#endif
" -K, --proto <t,h,u,i> Protocol whitelist: tls,http,udp,ipv4\n"
" -H, --hosts <file|:str> Hosts whitelist, filename or :string\n"
" -j, --ipset <file|:str> IP whitelist\n"
" -V, --pf <port[-portr]> Ports range whitelist\n"
" -R, --round <num[-numr]> Number of request to which desync will be applied\n"
" -s, --split <pos_t> Position format: offset[:repeats:skip][+flag1[flag2]]\n"
@ -167,6 +168,7 @@ const struct option options[] = {
{"drop-sack", 0, 0, 'Y'},
{"protect-path", 1, 0, 'P'}, //
#endif
{"ipset", 1, 0, 'j'},
{0}
};
@ -317,6 +319,73 @@ struct mphdr *parse_hosts(char *buffer, size_t size)
}
static int parse_ip(char *out, char *str, size_t size)
{
long bits = 0;
char *sep = memchr(str, '/', size);
if (sep) {
bits = strtol(sep + 1, 0, 10);
if (bits <= 0) {
return 0;
}
*sep = 0;
}
int len = 4;
if (inet_pton(AF_INET, str, out) <= 0) {
if (inet_pton(AF_INET6, str, out) <= 0) {
return 0;
}
else len = 16;
}
if (!bits || bits > len * 8) bits = len * 8;
return (int )bits;
}
struct mphdr *parse_ipset(char *buffer, size_t size)
{
struct mphdr *hdr = mem_pool(0);
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') {
continue;
}
if (s == e) {
s++;
continue;
}
char ip[e - s + 1];
ip[e - s] = 0;
memcpy(ip, s, e - s);
num++;
s = e + 1;
char ip_raw[16];
int bits = parse_ip(ip_raw, ip, sizeof(ip));
if (bits <= 0) {
LOG(LOG_E, "invalid ip: num: %zd\n", num + 1);
continue;
}
struct elem *elem = mem_add(hdr, ip_raw, bits / 8 + (bits % 8 ? 1 : 0), sizeof(struct elem));
if (!elem) {
free(hdr);
return 0;
}
elem->len = bits;
elem->cmp_type = CMP_BITS;
}
return hdr;
}
int get_addr(const char *str, struct sockaddr_ina *addr)
{
struct addrinfo hints = {0}, *res = 0;
@ -475,6 +544,10 @@ void clear_params(void)
mem_destroy(s.hosts);
s.hosts = 0;
}
if (s.ipset != 0) {
mem_destroy(s.ipset);
s.hosts = 0;
}
}
free(params.dp);
params.dp = 0;
@ -615,7 +688,7 @@ int main(int argc, char **argv)
break;
case 'A':
if (!(dp->hosts || dp->proto || dp->pf[0] || dp->detect)) {
if (!(dp->hosts || dp->proto || dp->pf[0] || dp->detect || dp->ipset)) {
all_limited = 0;
}
dp = add((void *)&params.dp, &params.dp_count,
@ -715,6 +788,25 @@ int main(int argc, char **argv)
}
break;
case 'j':;
if (dp->ipset) {
continue;
}
ssize_t size;
char *data = ftob(optarg, &size);
if (!data) {
uniperror("read/parse");
invalid = 1;
continue;
}
dp->ipset = parse_ipset(data, size);
if (!dp->ipset) {
perror("parse_ipset");
invalid = 1;
}
free(data);
break;
case 's':
case 'd':
case 'o':

36
mpool.c
View File

@ -1,17 +1,47 @@
#include "mpool.h"
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
static inline int scmp(const struct elem *p, const struct elem *q)
static int bit_cmp(const struct elem *p, const struct elem *q)
{
if (p->len != q ->len) {
if (p->len < q->len) {
return -1;
}
int df = q->len % 8, bytes = q->len / 8;
int cmp = memcmp(p->data, q->data, bytes);
if (cmp || !df) {
return cmp;
}
uint8_t c1 = p->data[bytes] >> (8 - df);
uint8_t c2 = q->data[bytes] >> (8 - df);
if (c1 != c2) {
if (c1 < c2) return -1;
else return 1;
}
return 0;
}
static int byte_cmp(const struct elem *p, const struct elem *q)
{
if (p->len != q->len) {
return p->len < q->len ? -1 : 1;
}
return memcmp(p->data, q->data, p->len);
}
static int scmp(const struct elem *p, const struct elem *q)
{
if (q->cmp_type == CMP_BITS)
return bit_cmp(p, q);
return byte_cmp(p, q);
}
KAVL_INIT(my, struct elem, head, scmp)

View File

@ -5,9 +5,13 @@
#include <time.h>
#include "kavl.h"
#define CMP_BYTES 0
#define CMP_BITS 1
struct elem {
int len;
char *data;
char cmp_type;
KAVL_HEAD(struct elem) head;
};

View File

@ -88,6 +88,7 @@ struct desync_params {
int proto;
int detect;
struct mphdr *hosts;
struct mphdr *ipset;
uint16_t pf[2];
int rounds[2];