diff options
Diffstat (limited to 'src/ipcpd/normal/dt_pci.c')
| -rw-r--r-- | src/ipcpd/normal/dt_pci.c | 59 |
1 files changed, 25 insertions, 34 deletions
diff --git a/src/ipcpd/normal/dt_pci.c b/src/ipcpd/normal/dt_pci.c index 77fa048e..76304668 100644 --- a/src/ipcpd/normal/dt_pci.c +++ b/src/ipcpd/normal/dt_pci.c @@ -1,7 +1,7 @@ /* * Ouroboros - Copyright (C) 2016 - 2018 * - * Protocol Control Information of Data Transfer AE + * Protocol Control Information of Data Transfer Component * * Dimitri Staessens <[email protected]> * Sander Vrijders <[email protected]> @@ -28,36 +28,32 @@ #include <string.h> #include <assert.h> -#define DEFAULT_TTL 60 - struct { uint8_t addr_size; - uint8_t fd_size; - bool has_ttl; + uint8_t eid_size; size_t head_size; - /* offsets */ + /* Offsets */ size_t qc_o; size_t ttl_o; - size_t fd_o; + size_t eid_o; + + /* Initial TTL value */ + uint8_t max_ttl; } dt_pci_info; int dt_pci_init(uint8_t addr_size, - uint8_t fd_size, - bool has_ttl) + uint8_t eid_size, + uint8_t max_ttl) { dt_pci_info.addr_size = addr_size; - dt_pci_info.fd_size = fd_size; - dt_pci_info.has_ttl = has_ttl; - - dt_pci_info.qc_o = dt_pci_info.addr_size; - dt_pci_info.ttl_o = dt_pci_info.qc_o + QOS_LEN; - if (dt_pci_info.has_ttl) - dt_pci_info.fd_o = dt_pci_info.ttl_o + TTL_LEN; - else - dt_pci_info.fd_o = dt_pci_info.ttl_o; + dt_pci_info.eid_size = eid_size; + dt_pci_info.max_ttl = max_ttl; - dt_pci_info.head_size = dt_pci_info.fd_o + dt_pci_info.fd_size; + dt_pci_info.qc_o = dt_pci_info.addr_size; + dt_pci_info.ttl_o = dt_pci_info.qc_o + QOS_LEN; + dt_pci_info.eid_o = dt_pci_info.ttl_o + TTL_LEN; + dt_pci_info.head_size = dt_pci_info.eid_o + dt_pci_info.eid_size; return 0; } @@ -70,7 +66,7 @@ int dt_pci_ser(struct shm_du_buff * sdb, struct dt_pci * dt_pci) { uint8_t * head; - uint8_t ttl = DEFAULT_TTL; + uint8_t ttl = dt_pci_info.max_ttl; assert(sdb); assert(dt_pci); @@ -79,12 +75,11 @@ int dt_pci_ser(struct shm_du_buff * sdb, if (head == NULL) return -EPERM; - /* FIXME: Add check and operations for Big Endian machines */ + /* FIXME: Add check and operations for Big Endian machines. */ memcpy(head, &dt_pci->dst_addr, dt_pci_info.addr_size); memcpy(head + dt_pci_info.qc_o, &dt_pci->qc, QOS_LEN); - if (dt_pci_info.has_ttl) - memcpy(head + dt_pci_info.ttl_o, &ttl, TTL_LEN); - memcpy(head + dt_pci_info.fd_o, &dt_pci->fd, dt_pci_info.fd_size); + memcpy(head + dt_pci_info.ttl_o, &ttl, TTL_LEN); + memcpy(head + dt_pci_info.eid_o, &dt_pci->eid, dt_pci_info.eid_size); return 0; } @@ -99,18 +94,14 @@ void dt_pci_des(struct shm_du_buff * sdb, head = shm_du_buff_head(sdb); - /* FIXME: Add check and operations for Big Endian machines */ + /* Decrease TTL */ + --*(head + dt_pci_info.ttl_o); + + /* FIXME: Add check and operations for Big Endian machines. */ memcpy(&dt_pci->dst_addr, head, dt_pci_info.addr_size); memcpy(&dt_pci->qc, head + dt_pci_info.qc_o, QOS_LEN); - - if (dt_pci_info.has_ttl) { - --*(head + dt_pci_info.ttl_o); /* decrease TTL */ - memcpy(&dt_pci->ttl, head + dt_pci_info.ttl_o, TTL_LEN); - } else { - dt_pci->ttl = 1; - } - - memcpy(&dt_pci->fd, head + dt_pci_info.fd_o, dt_pci_info.fd_size); + memcpy(&dt_pci->ttl, head + dt_pci_info.ttl_o, TTL_LEN); + memcpy(&dt_pci->eid, head + dt_pci_info.eid_o, dt_pci_info.eid_size); } void dt_pci_shrink(struct shm_du_buff * sdb) |