static void ftp_pass_info(struct connection *c, struct read_buffer *rb)
{
int g = get_ftp_response(c, rb, 0);
if (g == -1) {
setcstate(c, S_FTP_ERROR);
abort_connection(c);
return;
}
if (!g) {
read_from_socket(c, c->sock1, rb, ftp_pass_info);
setcstate(c, S_LOGIN);
return;
}
if (g >= 530 && g < 540) {
setcstate(c, S_FTP_LOGIN);
abort_connection(c);
return;
}
if (g >= 400) {
setcstate(c, S_FTP_UNAVAIL);
abort_connection(c);
return;
}
if (ftp_options.fast_ftp) ftp_retr_file(c, rb);
else ftp_send_retr_req(c, S_GETH);
}
void ftp_got_user_info(struct connection *c, struct read_buffer *rb)
{
int g = get_ftp_response(c, rb, 0);
if (g == -1) { setcstate(c, S_FTP_ERROR); abort_connection(c); return; }
if (!g) { read_from_socket(c, c->sock1, rb, ftp_got_user_info); return; }
if (g >= 530 && g < 540) { setcstate(c, S_FTP_LOGIN); retry_connection(c); return; }
if (g >= 400) { setcstate(c, S_FTP_UNAVAIL); retry_connection(c); return; }
if (g >= 200 && g < 300) {
if (ftp_options.fast_ftp) ftp_dummy_info(c, rb);
else ftp_send_retr_req(c, S_GETH);
} else {
if (ftp_options.fast_ftp) ftp_pass_info(c, rb);
else {
unsigned char *login;
unsigned char *u;
int logl = 0;
login = init_str();
add_to_str(&login, &logl, "PASS ");
if ((u = get_pass(c->url)) && *u) add_to_str(&login, &logl, u);
else add_to_str(&login, &logl, ftp_options.anon_pass);
if (u) mem_free(u);
add_to_str(&login, &logl, "\r\n");
write_to_socket(c, c->sock1, login, strlen(login), ftp_sent_passwd);
mem_free(login);
setcstate(c, S_LOGIN);
}
}
}
void ftp_retr_file(struct connection *c, struct read_buffer *rb)
{
int g;
struct ftp_connection_info *inf = c->info;
if (0) {
rep:
if (!ftp_options.fast_ftp) {
ftp_send_retr_req(c, S_GETH);
return;
}
}
if (inf->pending_commands > 1) {
unsigned char pc[6];
if (inf->pasv && inf->opc - (inf->pending_commands - 1) == 2) {
int i = 3, j;
while (i < rb->len) {
if (rb->data[i] >= '0' && rb->data[i] <= '9') {
for (j = 0; j < 6; j++) {
int n = 0;
while (rb->data[i] >= '0' && rb->data[i] <= '9') {
n = n * 10 + rb->data[i] - '0';
if (n >= 256) goto no_pasv;
if (++i >= rb->len) goto no_pasv;
}
pc[j] = n;
if (j != 5) {
if (rb->data[i] != ',') goto xa;
if (++i >= rb->len) goto xa;
if (rb->data[i] < '0' || rb->data[i] > '9') {
xa:
if (j != 1) goto no_pasv;
pc[4] = pc[0];
pc[5] = pc[1];
{
unsigned a;
struct sockaddr_in sa;
socklen_t nl = sizeof(sa);
if (getpeername(c->sock1, (struct sockaddr *)(void *)&sa, &nl)) goto no_pasv;
if (nl != sizeof(sa)) goto no_pasv;
a = ntohl(sa.sin_addr.s_addr);
pc[0] = a >> 24;
pc[1] = a >> 16;
pc[2] = a >> 8;
pc[3] = a;
goto pasv_ok;
}
}
}
}
goto pasv_ok;
}
i++;
}
void ftp_func(struct connection *c)
{
/*setcstate(c, S_CONN);*/
/*set_timeout(c);*/
if (get_keepalive_socket(c)) {
int p;
if ((p = get_port(c->url)) == -1) {
setcstate(c, S_INTERNAL);
abort_connection(c);
return;
}
make_connection(c, p, &c->sock1, ftp_options.fast_ftp ? ftp_login : ftp_get_banner);
} else ftp_send_retr_req(c, S_SENT);
}
static void ftp_retr_file(struct connection *c, struct read_buffer *rb)
{
int g;
struct ftp_connection_info *inf = c->info;
if (0) {
rep:
if (!ftp_options.fast_ftp) {
ftp_send_retr_req(c, S_GETH);
return;
}
}
if (inf->pending_commands > 1) {
unsigned char pc[6];
if (inf->pasv && inf->opc - (inf->pending_commands - 1) == 2) {
int i, j;
i = 3;
if (!inf->eprt_epsv) while (i < rb->len) {
if (rb->data[i] >= '0' && rb->data[i] <= '9') {
for (j = 0; j < 6; j++) {
int n = 0;
while (rb->data[i] >= '0' && rb->data[i] <= '9') {
n = n * 10 + rb->data[i] - '0';
if (n >= 256) goto no_pasv;
if (++i >= rb->len) goto no_pasv;
}
pc[j] = n;
if (j != 5) {
if (rb->data[i] != ',') goto xa;
if (++i >= rb->len) goto xa;
if (rb->data[i] < '0' || rb->data[i] > '9') {
xa:
if (j != 1) goto no_pasv;
pc[4] = pc[0];
pc[5] = pc[1];
pc[0] = pc[1] = pc[2] = pc[3] = 0;
goto pasv_ok;
}
}
}
goto pasv_ok;
}
i++;
}
no_pasv:
i = 3;
while (i < rb->len - 5) {
if (rb->data[i] == '(' && (rb->data[i + 1] < '0' || rb->data[i + 1] > '9') && rb->data[i + 1] == rb->data[i + 2] && rb->data[i + 2] == rb->data[i + 3]) {
unsigned char delim = rb->data[i + 1];
int n = 0;
i += 4;
while (rb->data[i] >= '0' && rb->data[i] <= '9') {
n = n * 10 + rb->data[i] - '0';
if (n >= 65536) goto no_epsv;
if (++i >= rb->len) goto no_epsv;
}
if (rb->data[i] != delim) goto no_epsv;
pc[4] = n >> 8;
pc[5] = n & 0xff;
pc[0] = pc[1] = pc[2] = pc[3] = 0;
goto pasv_ok;
}
i++;
}
