int
client_parse(struct session *s)
{
/* Reset any previous command. */
s->cmd = CMD_NONE;
s->port = 0;
/* Commands we are looking for are at least 4 chars long. */
if (linelen < 4)
return (1);
if (linebuf[0] == 'P' || linebuf[0] == 'p' ||
linebuf[0] == 'E' || linebuf[0] == 'e') {
if (!client_parse_cmd(s))
return (0);
/*
* Allow active mode connections immediately, instead of
* waiting for a positive reply from the server. Some
* rare servers/proxies try to probe or setup the data
* connection before an actual transfer request.
*/
if (s->cmd == CMD_PORT || s->cmd == CMD_EPRT)
return (allow_data_connection(s));
}
if (anonymous_only && (linebuf[0] == 'U' || linebuf[0] == 'u'))
return (client_parse_anon(s));
return (1);
}
void client_main(int csock, struct sockaddr_in *client_addr)
{
//printf("client connected: %s\n", inet_ntoa(client_addr->sin_addr));
uint8_t cmd;
while(1) {
int n = recv(csock, &cmd, sizeof(cmd), 0);
if(n == 0) {
//printf("client disconnected\n");
if(close(csock) == -1)
printf("close failed: %s\n", strerror(errno));
break;
}
else if(n == -1) {
printf("read error: %s\n", strerror(errno));
if(close(csock) == -1)
printf("close failed: %s\n", strerror(errno));
break;
}
if(client_parse_cmd(csock, client_addr, cmd) <= 0)
break;
}
}