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PPP, added ppp_free()

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Free the control block, clean everything except the PPP PCB itself
and the netif, it allows you to change the underlying PPP protocol
(eg. from PPPoE to PPPoS to switch from DSL to GPRS) without losing
your PPP and netif handlers.
This commit is contained in:
Sylvain Rochet 2013-04-23 00:19:07 +02:00
parent 44b527415f
commit a1555e0615
2 changed files with 62 additions and 16 deletions
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15
src/include/netif/ppp/ppp.h
View File

@ -539,6 +539,21 @@ int ppp_close(ppp_pcb *pcb);
*/
void ppp_sighup(ppp_pcb *pcb);
/*
* Free the control block, clean everything except the PPP PCB itself
* and the netif, it allows you to change the underlying PPP protocol
* (eg. from PPPoE to PPPoS to switch from DSL to GPRS) without losing
* your PPP and netif handlers.
*
* This can only be called if PPP is in the dead phase.
*
* You must use ppp_close() before if you wish to terminate
* an established PPP session.
*
* Return 0 on success, an error code on failure.
*/
int ppp_free(ppp_pcb *pcb);
/*
* Release the control block.
*

63
src/netif/ppp/ppp.c
View File

@ -519,6 +519,48 @@ ppp_sighup(ppp_pcb *pcb)
ppp_hup(pcb);
}
/*
* Free the control block, clean everything except the PPP PCB itself
* and the netif, it allows you to change the underlying PPP protocol
* (eg. from PPPoE to PPPoS to switch from DSL to GPRS) without losing
* your PPP and netif handlers.
*
* This can only be called if PPP is in the dead phase.
*
* You must use ppp_close() before if you wish to terminate
* an established PPP session.
*
* Return 0 on success, an error code on failure.
*/
int ppp_free(ppp_pcb *pcb) {
if (pcb->phase != PHASE_DEAD) {
return PPPERR_PARAM;
}
PPPDEBUG(LOG_DEBUG, ("ppp_free: unit %d\n", pcb->num));
#if PPPOE_SUPPORT
if (pcb->pppoe_sc) {
pppoe_destroy(&pcb->netif);
pcb->pppoe_sc = NULL;
}
#endif /* PPPOE_SUPPORT */
#if PPPOL2TP_SUPPORT
if (pcb->l2tp_pcb) {
pppol2tp_destroy(pcb->l2tp_pcb);
pcb->l2tp_pcb = NULL;
}
#endif /* PPPOL2TP_SUPPORT */
#if PPPOS_SUPPORT
/* input pbuf left ? */
ppp_free_current_input_packet(&pcb->rx);
#endif /* PPPOS_SUPPORT */
return 0;
}
/*
* Release the control block.
*
@ -530,29 +572,18 @@ ppp_sighup(ppp_pcb *pcb)
* Return 0 on success, an error code on failure.
*/
int ppp_delete(ppp_pcb *pcb) {
int err;
if (pcb->phase != PHASE_DEAD) {
return PPPERR_PARAM;
}
PPPDEBUG(LOG_DEBUG, ("ppp_delete: unit %d\n", pcb->num));
netif_remove(&pcb->netif);
#if PPPOE_SUPPORT
if (pcb->pppoe_sc) {
pppoe_destroy(&pcb->netif);
if( (err = ppp_free(pcb)) != PPPERR_NONE) {
return err;
}
#endif /* PPPOE_SUPPORT */
#if PPPOL2TP_SUPPORT
if (pcb->l2tp_pcb) {
pppol2tp_destroy(pcb->l2tp_pcb);
}
#endif /* PPPOL2TP_SUPPORT */
#if PPPOS_SUPPORT
/* input pbuf left ? */
ppp_free_current_input_packet(&pcb->rx);
#endif /* PPPOS_SUPPORT */
memp_free(MEMP_PPP_PCB, pcb);
return 0;