mirror of
https://github.com/hufrea/byedpi.git
synced 2024-12-22 06:15:14 +00:00
Refactoring on_request func
This commit is contained in:
ruti
parent
93fdc80191
commit
828f118afe
118
proxy.c
118
proxy.c
@ -145,7 +145,17 @@ int auth_socks5(int fd, char *buffer, ssize_t n)
|
||||
}
|
||||
|
||||
|
||||
int resp_error(int fd, int e, int flag, int re)
|
||||
int resp_s5_error(int fd, int e)
|
||||
{
|
||||
struct s5_rep s5r = {
|
||||
.ver = 0x05, .code = (uint8_t )e,
|
||||
.atp = S_ATP_I4
|
||||
};
|
||||
return send(fd, (char *)&s5r, sizeof(s5r), 0);
|
||||
}
|
||||
|
||||
|
||||
int resp_error(int fd, int e, int flag)
|
||||
{
|
||||
if (flag == FLAG_S4) {
|
||||
struct s4_req s4r = {
|
||||
@ -154,76 +164,65 @@ int resp_error(int fd, int e, int flag, int re)
|
||||
return send(fd, (char *)&s4r, sizeof(s4r), 0);
|
||||
}
|
||||
else if (flag == FLAG_S5) {
|
||||
uint8_t se;
|
||||
if (re) se = (uint8_t )re;
|
||||
else switch (e) {
|
||||
case 0: se = S_ER_OK;
|
||||
switch (e) {
|
||||
case 0: e = S_ER_OK;
|
||||
break;
|
||||
case ECONNREFUSED:
|
||||
se = S_ER_CONN;
|
||||
e = S_ER_CONN;
|
||||
break;
|
||||
case EHOSTUNREACH:
|
||||
case ETIMEDOUT:
|
||||
se = S_ER_HOST;
|
||||
e = S_ER_HOST;
|
||||
break;
|
||||
case ENETUNREACH:
|
||||
se = S_ER_NET;
|
||||
e = S_ER_NET;
|
||||
break;
|
||||
default: se = S_ER_GEN;
|
||||
default: e = S_ER_GEN;
|
||||
}
|
||||
struct s5_rep s5r = {
|
||||
.ver = 0x05, .code = se,
|
||||
.atp = S_ATP_I4
|
||||
};
|
||||
return send(fd, (char *)&s5r, sizeof(s5r), 0);
|
||||
return resp_s5_error(fd, e);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
int handle_socks4(int fd, char *bf,
|
||||
int s4_get_addr(int fd, char *bf,
|
||||
size_t n, struct sockaddr_ina *dst)
|
||||
{
|
||||
if (n < sizeof(struct s4_req) + 1) {
|
||||
return -1;
|
||||
}
|
||||
struct s4_req *r = (struct s4_req *)bf;
|
||||
char er = 0;
|
||||
|
||||
if (r->cmd != S_CMD_CONN) {
|
||||
er = 1;
|
||||
return -1;
|
||||
}
|
||||
else if (ntohl(r->i4.s_addr) <= 255) do {
|
||||
er = 1;
|
||||
if (!params.resolve || bf[n - 1])
|
||||
break;
|
||||
char *ie = strchr(bf + sizeof(*r), 0);
|
||||
if (!ie)
|
||||
break;
|
||||
int len = (bf + n - ie) - 2;
|
||||
if (len < 3)
|
||||
break;
|
||||
if (resolve(ie + 1, len, dst)) {
|
||||
fprintf(stderr, "not resolved: %.*s\n", len, ie + 1);
|
||||
break;
|
||||
if (ntohl(r->i4.s_addr) <= 255) {
|
||||
if (!params.resolve || bf[n - 1] != 0) {
|
||||
return -1;
|
||||
}
|
||||
er = 0;
|
||||
} while (0);
|
||||
char *id_end = strchr(bf + sizeof(*r), 0);
|
||||
if (!id_end) {
|
||||
return -1;
|
||||
}
|
||||
int len = (bf + n - id_end) - 2;
|
||||
if (len < 3 || len > 255) {
|
||||
return -1;
|
||||
}
|
||||
if (resolve(id_end + 1, len, dst)) {
|
||||
fprintf(stderr, "not resolved: %.*s\n", len, id_end + 1);
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
else {
|
||||
dst->in.sin_family = AF_INET;
|
||||
dst->in.sin_addr = r->i4;
|
||||
}
|
||||
if (er) {
|
||||
if (resp_error(fd, 1, FLAG_S4, 0) < 0)
|
||||
perror("send");
|
||||
return -1;
|
||||
}
|
||||
dst->in.sin_port = r->port;
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
int s_get_addr(char *buffer, ssize_t n,
|
||||
int s5_get_addr(char *buffer, ssize_t n,
|
||||
struct sockaddr_ina *addr)
|
||||
{
|
||||
struct s5_req *r = (struct s5_req *)buffer;
|
||||
@ -235,6 +234,10 @@ int s_get_addr(char *buffer, ssize_t n,
|
||||
fprintf(stderr, "ss: bad request\n");
|
||||
return S_ER_GEN;
|
||||
}
|
||||
if (r->cmd != S_CMD_CONN) {
|
||||
fprintf(stderr, "ss: unsupported cmd: 0x%x\n", r->cmd);
|
||||
return S_ER_CMD;
|
||||
}
|
||||
switch (r->atp) {
|
||||
case S_ATP_I4:
|
||||
addr->in.sin_family = AF_INET;
|
||||
@ -335,7 +338,6 @@ static inline int on_request(struct poolhd *pool, struct eval *val,
|
||||
char *buffer, size_t bfsize)
|
||||
{
|
||||
struct sockaddr_ina dst = {0};
|
||||
int error = 0, s5e = 0;
|
||||
|
||||
ssize_t n = recv(val->fd, buffer, bfsize, 0);
|
||||
if (n < 1) {
|
||||
@ -354,35 +356,33 @@ static inline int on_request(struct poolhd *pool, struct eval *val,
|
||||
fprintf(stderr, "ss: request to small\n");
|
||||
return -1;
|
||||
}
|
||||
struct s5_req *r = (struct s5_req *)buffer;
|
||||
|
||||
if (r->cmd != S_CMD_CONN) {
|
||||
fprintf(stderr, "ss: unsupported cmd: 0x%x\n", r->cmd);
|
||||
s5e = S_ER_CMD;
|
||||
}
|
||||
else {
|
||||
s5e = s_get_addr(buffer, n, &dst);
|
||||
if (!s5e) {
|
||||
error = create_conn(pool, val, &dst);
|
||||
}
|
||||
int s5e = s5_get_addr(buffer, n, &dst);
|
||||
if (!s5e &&
|
||||
create_conn(pool, val, &dst)) {
|
||||
s5e = S_ER_GEN;
|
||||
}
|
||||
if (s5e) {
|
||||
resp_s5_error(val->fd, s5e);
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
else if (*buffer == S_VER4) {
|
||||
if (handle_socks4(val->fd, buffer, n, &dst)) {
|
||||
val->flag = FLAG_S4;
|
||||
|
||||
int error = s4_get_addr(val->fd, buffer, n, &dst);
|
||||
if (!error) {
|
||||
error = create_conn(pool, val, &dst);
|
||||
}
|
||||
if (error) {
|
||||
if (resp_error(val->fd, error, FLAG_S4) < 0)
|
||||
perror("send");
|
||||
return -1;
|
||||
}
|
||||
error = create_conn(pool, val, &dst);
|
||||
val->flag = FLAG_S4;
|
||||
}
|
||||
else {
|
||||
fprintf(stderr, "ss: invalid version: 0x%x (%lu)\n", *buffer, n);
|
||||
return -1;
|
||||
}
|
||||
if (error || s5e) {
|
||||
if (resp_error(val->fd, error ? errno : 0, val->flag, s5e) < 0)
|
||||
perror("send");
|
||||
return -1;
|
||||
}
|
||||
val->type = EV_IGNORE;
|
||||
return 0;
|
||||
}
|
||||
@ -444,7 +444,7 @@ static inline int on_connect(struct poolhd *pool, struct eval *val,
|
||||
}
|
||||
}
|
||||
if (resp_error(val->pair->fd,
|
||||
error, val->pair->flag, 0) < 0) {
|
||||
error, val->pair->flag) < 0) {
|
||||
perror("send");
|
||||
return -1;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user