void handle_ftpcmd(session_t *sess)
{
char buf[MAXCMD] = {0};
sprintf(buf, "Welcome to zftp!\r\n%d", FTP_READY);
ftp_cmdio_write_m(sess->ctrl_fd, FTP_READY, buf);
while (1) {
start_signal_alarm_ctrl();
_reset_session_cmd(sess);
int ret = ftp_cmdio_get_cmd_args(sess->ctrl_fd, sess->ftp_cmd_line,
MAXCMD);
if (ret == -1) {
if (errno == EINTR)
continue;
ERROR_EXIT("ftp_cmdio_get_cmd_args");
} else if (ret == 0)
exit(0);
str_trim_crlf(sess->ftp_cmd_line);
str_split(sess->ftp_cmd_line, sess->ftp_cmd_op,
sess->ftp_cmd_arg, ' ');
str_toupper(sess->ftp_cmd_op);
_handle_map(sess);
}
}
//读取配置文件
void parseconf_load_file(const char *path)
{
FILE *fp = fopen(path, "r");
if (fp == NULL)
ERR_EXIT("fopen");
char setting_line[1024] = {0};
while (fgets(setting_line, sizeof(setting_line), fp) != NULL)
{
//去掉空行、全是空格的、以#号开头的注释行
if (strlen(setting_line) == 0
|| setting_line[0] == '#'
|| str_all_space(setting_line))
continue;
//去掉后面的/r/n
str_trim_crlf(setting_line);
//解析配置信息
parseconf_load_setting(setting_line);
memset(setting_line, 0, sizeof(setting_line));
}
fclose(fp);
}
void handle_child(session_t *pses)
{
if(pses == NULL)
handle_error_str("do_cmd_user: pses is NULL.");
ftp_reply(pses->ctrl_fd, FTP_GREET, "(Mftp 0.1)"); //220
int iret;
while(true)
{
memset(pses->cmdline, 0, MAX_COMMAND_LINE);
memset(pses->cmd, 0, MAX_COMMAND);
memset(pses->arg, 0, MAX_ARG);
iret = recvline(pses->ctrl_fd, pses->cmdline, MAX_COMMAND_LINE);//接收命令行
if(iret == -1)
handle_error("recvline");
else if(iret == 0)
handle_error("recvline");
//去掉\r\n
str_trim_crlf(pses->cmdline);
//分割命令和参数
str_split(pses->cmdline, pses->cmd, pses->arg, ' ');
//将命令转换成大写
str_upper(pses->cmd);
#ifdef _DEBUG_
printf("cmd = [%s] arg = [%s]\n", pses->cmd,pses->arg);
#endif
//处理ftp命令
int len = ARRAYLEN(ctrl_cmds);
int i = 0;
for(i = 0; i < len; i++)
{
if(strcmp(ctrl_cmds[i].cmd, pses->cmd) == 0)
{
if(ctrl_cmds[i].cmd_handler != NULL)
{
(*ctrl_cmds[i].cmd_handler)(pses);
//等价于ctrl_cmds[i].cmd_handler(pses);
}
else
{
ftp_reply(pses->ctrl_fd, FTP_COMMANDNOTIMPL, "Unimplement command."); //502
}
break;
}
}
if(i >= len)
{
//没找到命令
ftp_reply(pses->ctrl_fd, FTP_BADCMD, "Unknown command.");
}
}
}
void parseconf_load_file(const char *path){
FILE *fp = fopen(path, "r");
if(fp == NULL) ERR_EXIT("fopen");
char setting_line[MAX_SETTING_LINE] = {0};
while(fgets(setting_line, sizeof(setting_line), fp) != NULL){
if(strlen(setting_line) == 0
|| setting_line[0] == '#'
|| str_all_space(setting_line))
continue;
str_trim_crlf(setting_line);
parseconf_load_setting(setting_line);
memset(setting_line, 0, sizeof setting_line);
}
fclose(fp);
}
void handle_child(session_t* sess)
{
ftp_reply(sess, FTP_GREET, "(miniftpd 0.1)");
int ret;
while(1)
{
memset(sess->cmdline, 0, sizeof(sess->cmdline));
memset(sess->cmd, 0, sizeof(sess->cmd));
memset(sess->arg, 0, sizeof(sess->arg));
start_cmdio_alarm();
ret = readline(sess->ctrl_fd, sess->cmdline, MAX_COMMAND_LINE);
if(ret == -1)
ERR_EXIT("readline");
else if(ret == 0)
exit(EXIT_SUCCESS);
//remove \r\n
//parse FTP command and ar
str_trim_crlf(sess->cmdline);
str_split(sess->cmdline, sess->cmd, sess->arg, ' ');
str_upper(sess->cmd);
int i;
int size = sizeof(ctrl_cmds) / sizeof(ctrl_cmds[0]);
for(i = 0; i < size; ++i)
{
if(strcmp(ctrl_cmds[i].cmd, sess->cmd) == 0)
{
if(ctrl_cmds[i].cmd_handler != NULL)
ctrl_cmds[i].cmd_handler(sess);
else
ftp_reply(sess, FTP_COMMANDNOTIMPL,
"Unimplement command");
break;
}
}
if(i == size)
ftp_reply(sess, FTP_BADCMD, "Unknown command.");
}
}
void handle_sigurg(int sig)
{
if(p_sess->data_fd == -1)
return;
char cmdline[MAX_COMMAND_LINE] = {0};
int ret = readline(p_sess->ctrl_fd, cmdline, MAX_COMMAND_LINE);
if(ret <= 0)
ERR_EXIT("readline");
str_trim_crlf(cmdline);
if(strcmp(cmdline, "ABOR") == 0 ||
strcmp(cmdline, "\377\364\377\362ABOR") == 0)
{
p_sess->abor_received = 1;
shutdown(p_sess->data_fd, SHUT_RDWR);
}
else
ftp_reply(p_sess, FTP_BADCMD, "Unknown command.");
}
//处理SIGURG信号，实质是处理带外数据
static void handle_signal_sigurg(int sig)
{
char cmdline[1024] = {0};
int ret = readline(p_sess->peerfd, cmdline, sizeof cmdline);
if(ret <= 0) //存在带外数据，不可能为0
ERR_EXIT("readline");
str_trim_crlf(cmdline);
str_upper(cmdline);
if(strcmp("ABOR", cmdline) == 0
|| strcmp("\377\364\377\362ABOR", cmdline) == 0)
{
//处理abor指令
p_sess->is_receive_abor = 1;
close(p_sess->data_fd);
p_sess->data_fd = -1;
}
else
{
//未识别的命令
ftp_reply(p_sess, FTP_BADCMD, "Unknown command.");
}
}
/*
* parseconf_load_file -- 加载配置文件配置
* 参数：
@path： 配置文件路径
*/
void parseconf_load_file(const char *path)
{
FILE *fp = fopen(path, "r");
if(fp == NULL)
handle_error("fopen");
char setting_line[1024] = {0};
while(fgets(setting_line, sizeof(setting_line), fp) != NULL)
{
if((strlen(setting_line) == 0) ||
(setting_line[0] == '#') ||
str_all_space(setting_line))
{
memset(setting_line, 0, sizeof(setting_line));
continue;
}
//将得到的有效字符串去除\r\n
str_trim_crlf(setting_line);
//解析配置行,将信息保存在对应的变量中
parseconf_load_setting(setting_line);
memset(setting_line, 0, sizeof(setting_line));
}
fclose(fp);
}
