diff options
Diffstat (limited to 'src/ipcpd/pci.c')
| -rw-r--r-- | src/ipcpd/pci.c | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/src/ipcpd/pci.c b/src/ipcpd/pci.c new file mode 100644 index 00000000..1fd263d3 --- /dev/null +++ b/src/ipcpd/pci.c @@ -0,0 +1,147 @@ +/* + * Ouroboros - Copyright (C) 2016 + * + * Protocol Control Information + * + * Dimitri Staessens <dimitri.staessens@intec.ugent.be> + * Sander Vrijders <sander.vrijders@intec.ugent.be> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include "pci.h" +#include <malloc.h> +#include <errno.h> + +#define head_size(a, b) a.addr_size * 2 + \ + a.cep_id_size * 2 + \ + a.pdu_length_size + \ + a.seqno_size + \ + a.qos_id_size + \ + b.ttl_size +#define tail_size(b) b.chk_size + + +struct pci { + /* head */ + uint8_t * dst_addr; + uint8_t * src_addr; + uint8_t * dst_cep_id; + uint8_t * src_cep_id; + uint8_t * pdu_length; + uint8_t * ttl; uint8_t * seqno; + uint8_t * qos_id; + + uint8_t * chk; + + du_buff_t * dub; + + struct ipcp_dtp_const dtpc; + struct ipcp_dup_const dupc; + +}; + +pci_t * pci_create(du_buff_t * dub, + const struct ipcp_dtp_const dtpc, + const struct ipcp_dup_const dupc) +{ + + if (dub == NULL) { + LOG_DBGF("Bogus input. Bugging out."); + return NULL; + } + + struct pci * p = malloc(sizeof *p); + + if (p == NULL) + return NULL; + + p->dub = dub; +/* + p->dtpc = malloc( sizeof *(p->dtpc)); + if (p->dtpc == NULL) + return NULL; + + p->dupc = malloc( sizeof *(p->dupc)); + if (p->dupc == NULL) + return NULL; +*/ + p->dtpc = dtpc; + p->dupc = dupc; + + p->dst_addr = NULL; + p->src_addr =NULL; + p->dst_cep_id = NULL; + p->src_cep_id = NULL; + p->pdu_length = NULL; + p->ttl = NULL; + p->seqno = NULL; + p->qos_id = NULL; + p->chk = NULL; + + return p; +} + +void pci_destroy(pci_t * pci) +{ + free (pci); +} + +int pci_init(pci_t * pci) +{ + if (pci == NULL) { + LOG_DBGF("Bogus input. Bugging out."); + return -EINVAL; + } + + uint8_t * pci_head = du_buff_head_alloc(pci->dub, + head_size(pci->dtpc,pci->dupc)); + uint8_t * pci_tail = du_buff_tail_alloc(pci->dub, tail_size(pci->dupc)); + + if (pci_head == NULL) { + LOG_DBG("Failed to allocate space for PCI at head."); + return -ENOBUFS; + } + + if (pci_tail == NULL) { + LOG_DBG("Failed to allocate space for PCI at tail."); + return -ENOBUFS; + } + + pci->dst_addr = pci_head; + pci->src_addr = (pci_head += pci->dtpc.addr_size); + pci->dst_cep_id = (pci_head += pci->dtpc.addr_size); + pci->src_cep_id = (pci_head += pci->dtpc.cep_id_size); + pci->pdu_length = (pci_head += pci->dtpc.cep_id_size); + pci->ttl = (pci_head += pci->dtpc.pdu_length_size); + pci->seqno = (pci_head += pci->dupc.ttl_size); + pci->qos_id = (pci_head += pci->dtpc.seqno_size); + + pci->chk = (pci_tail); + + return 0; +} + +void pci_release(pci_t * pci) +{ + if (pci == NULL) + return; + + if (pci->dub == NULL) + return; + + du_buff_head_release(pci->dub, head_size(pci->dtpc, pci->dupc)); + du_buff_tail_release(pci->dub, tail_size(pci->dupc)); +} |