121 lines
3.2 KiB
C
121 lines
3.2 KiB
C
/*
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* lwftp_mod.h
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*
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* Created on: Feb 14, 2024
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* Author: SeungJu Lim
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*/
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/** Process newly connected PCB
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* @param pointer to lwftp session data
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* @param pointer to PCB
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* @param state of connection
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*/
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static err_t lwftp_control_connected(void *arg, struct tcp_pcb *tpcb, err_t err) {
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lwftp_session_t *s = (lwftp_session_t*) arg;
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if (err == ERR_OK) {
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LWIP_DEBUGF(LWFTP_STATE, ("lwftp:connected to server\n"));
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s->control_state = LWFTP_CONNECTED;
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} else {
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LWIP_DEBUGF(LWFTP_WARNING,
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("lwftp:err in control_connected (%s)\n", lwip_strerr(err)));
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}
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return err;
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}
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/** Close control connection
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* @param pointer to lwftp session data
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* @param result to pass to callback fn (if called)
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*/
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static void lwftp_control_close(lwftp_session_t *s, int result) {
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if (s->data_pcb) {
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lwftp_pcb_close(s->data_pcb);
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s->data_pcb = NULL;
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}
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if (s->control_pcb) {
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lwftp_pcb_close(s->control_pcb);
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s->control_pcb = NULL;
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}
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s->control_state = LWFTP_CLOSED;
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if ((result >= 0) && s->done_fn) {
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s->done_fn(s->handle, result);
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}
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}
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/** Process newly connected PCB
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* @param pointer to lwftp session data
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* @param pointer to PCB
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* @param state of connection
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*/
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static err_t lwftp_control_connected(void *arg, struct tcp_pcb *tpcb, err_t err) {
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lwftp_session_t *s = (lwftp_session_t*) arg;
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if (err == ERR_OK) {
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LWIP_DEBUGF(LWFTP_STATE, ("lwftp: connected to server\n"));
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s->control_state = LWFTP_CONNECTED;
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} else {
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LWIP_DEBUGF(LWFTP_WARNING,
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("lwftp: err in control_connected (%s)\n", lwip_strerr(err)));
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}
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return err;
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}
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/** Handle control connection error
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* @param pointer to lwftp session data
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* @param state of connection
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*/
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static void lwftp_control_err(void *arg, err_t err) {
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LWIP_UNUSED_ARG(err);
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if (arg != NULL) {
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lwftp_session_t *s = (lwftp_session_t*) arg;
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int result;
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if (s->control_state == LWFTP_CLOSED) {
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LWIP_DEBUGF(LWFTP_WARNING,
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("lwftp: failed to connect to server (%s)\n", lwip_strerr(err)));
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result = LWFTP_RESULT_ERR_CONNECT;
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} else {
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LWIP_DEBUGF(LWFTP_WARNING, ("lwftp: connection closed by remote host\n"));
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result = LWFTP_RESULT_ERR_CLOSED;
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}
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s->control_pcb = NULL; // No need to de-allocate PCB
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lwftp_control_close(s, result);
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}
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}
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/** Handle control connection incoming data
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* @param pointer to lwftp session data
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* @param pointer to PCB
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* @param pointer to incoming pbuf
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* @param state of incoming process
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*/
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static err_t lwftp_control_recv(void *arg, struct tcp_pcb *tpcb, struct pbuf *p,
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err_t err) {
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lwftp_session_t *s = (lwftp_session_t*) arg;
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if (err == ERR_OK) {
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if (p) {
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tcp_recved(tpcb, p->tot_len);
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lwftp_control_process(s, tpcb, p);
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} else {
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LWIP_DEBUGF(LWFTP_WARNING, ("lwftp: connection closed by remote host\n"));
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lwftp_control_close(s, LWFTP_RESULT_ERR_CLOSED);
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}
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} else {
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LWIP_DEBUGF(LWFTP_SERIOUS,
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("lwftp: failed to receive (%s)\n", lwip_strerr(err)));
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lwftp_control_close(s, LWFTP_RESULT_ERR_UNKNOWN);
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}
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return err;
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}
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/** Handle control connection acknowledge of sent data
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* @param pointer to lwftp session data
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* @param pointer to PCB
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* @param number of bytes sent
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*/
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static err_t lwftp_control_sent(void *arg, struct tcp_pcb *tpcb, u16_t len) {
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LWIP_DEBUGF(LWFTP_TRACE, ("lwftp: successfully sent %d bytes\n", len));
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return ERR_OK;
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}
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