diff options
| -rw-r--r-- | net/tipc/bearer.h | 19 | ||||
| -rw-r--r-- | net/tipc/eth_media.c | 63 |
2 files changed, 79 insertions, 3 deletions
diff --git a/net/tipc/bearer.h b/net/tipc/bearer.h index 4e9367f..41a61d2 100644 --- a/net/tipc/bearer.h +++ b/net/tipc/bearer.h @@ -43,6 +43,17 @@ #define MAX_MEDIA 2 /* + * Identifiers associated with TIPC message header media address info + * + * - address info field is 20 bytes long + * - media type identifier located at offset 3 + * - remaining bytes vary according to media type + */ + +#define TIPC_MEDIA_ADDR_SIZE 20 +#define TIPC_MEDIA_TYPE_OFFSET 3 + +/* * Identifiers of supported TIPC media types */ #define TIPC_MEDIA_TYPE_ETH 1 @@ -68,7 +79,10 @@ struct tipc_bearer; * @send_msg: routine which handles buffer transmission * @enable_bearer: routine which enables a bearer * @disable_bearer: routine which disables a bearer - * @addr2str: routine which converts bearer's address to string form + * @addr2str: routine which converts media address to string + * @str2addr: routine which converts media address from string + * @addr2msg: routine which converts media address to protocol message area + * @msg2addr: routine which converts media address from protocol message area * @bcast_addr: media address used in broadcasting * @priority: default link (and bearer) priority * @tolerance: default time (in ms) before declaring link failure @@ -84,6 +98,9 @@ struct media { int (*enable_bearer)(struct tipc_bearer *b_ptr); void (*disable_bearer)(struct tipc_bearer *b_ptr); int (*addr2str)(struct tipc_media_addr *a, char *str_buf, int str_size); + int (*str2addr)(struct tipc_media_addr *a, char *str_buf); + int (*addr2msg)(struct tipc_media_addr *a, char *msg_area); + int (*msg2addr)(struct tipc_media_addr *a, char *msg_area); struct tipc_media_addr bcast_addr; u32 priority; u32 tolerance; diff --git a/net/tipc/eth_media.c b/net/tipc/eth_media.c index 67f616a..ebba0fc 100644 --- a/net/tipc/eth_media.c +++ b/net/tipc/eth_media.c @@ -39,6 +39,8 @@ #define MAX_ETH_BEARERS MAX_BEARERS +#define ETH_ADDR_OFFSET 4 /* message header offset of MAC address */ + /** * struct eth_bearer - Ethernet bearer data structure * @bearer: ptr to associated "generic" bearer structure @@ -57,6 +59,16 @@ static int eth_started; static struct notifier_block notifier; /** + * eth_media_addr_set - initialize Ethernet media address structure + */ + +static void eth_media_addr_set(struct tipc_media_addr *a, char *mac) +{ + a->type = htonl(TIPC_MEDIA_TYPE_ETH); + memcpy(&a->dev_addr.eth_addr, mac, ETH_ALEN); +} + +/** * send_msg - send a TIPC message out over an Ethernet interface */ @@ -169,8 +181,7 @@ static int enable_bearer(struct tipc_bearer *tb_ptr) tb_ptr->usr_handle = (void *)eb_ptr; tb_ptr->mtu = dev->mtu; tb_ptr->blocked = 0; - tb_ptr->addr.type = htonl(TIPC_MEDIA_TYPE_ETH); - memcpy(&tb_ptr->addr.dev_addr, dev->dev_addr, ETH_ALEN); + eth_media_addr_set(&tb_ptr->addr, (char *)dev->dev_addr); return 0; } @@ -254,6 +265,51 @@ static int eth_addr2str(struct tipc_media_addr *a, char *str_buf, int str_size) return 0; } +/** + * eth_str2addr - convert string to Ethernet address + */ + +static int eth_str2addr(struct tipc_media_addr *a, char *str_buf) +{ + char mac[ETH_ALEN]; + int r; + + r = sscanf(str_buf, "%02x:%02x:%02x:%02x:%02x:%02x", + (u32 *)&mac[0], (u32 *)&mac[1], (u32 *)&mac[2], + (u32 *)&mac[3], (u32 *)&mac[4], (u32 *)&mac[5]); + + if (r != ETH_ALEN) + return 1; + + eth_media_addr_set(a, mac); + return 0; +} + +/** + * eth_str2addr - convert Ethernet address format to message header format + */ + +static int eth_addr2msg(struct tipc_media_addr *a, char *msg_area) +{ + memset(msg_area, 0, TIPC_MEDIA_ADDR_SIZE); + msg_area[TIPC_MEDIA_TYPE_OFFSET] = TIPC_MEDIA_TYPE_ETH; + memcpy(msg_area + ETH_ADDR_OFFSET, a->dev_addr.eth_addr, ETH_ALEN); + return 0; +} + +/** + * eth_str2addr - convert message header address format to Ethernet format + */ + +static int eth_msg2addr(struct tipc_media_addr *a, char *msg_area) +{ + if (msg_area[TIPC_MEDIA_TYPE_OFFSET] != TIPC_MEDIA_TYPE_ETH) + return 1; + + eth_media_addr_set(a, msg_area + ETH_ADDR_OFFSET); + return 0; +} + /* * Ethernet media registration info */ @@ -263,6 +319,9 @@ static struct media eth_media_info = { .enable_bearer = enable_bearer, .disable_bearer = disable_bearer, .addr2str = eth_addr2str, + .str2addr = eth_str2addr, + .addr2msg = eth_addr2msg, + .msg2addr = eth_msg2addr, .bcast_addr = { htonl(TIPC_MEDIA_TYPE_ETH), { {0xff, 0xff, 0xff, 0xff, 0xff, 0xff} } }, .priority = TIPC_DEF_LINK_PRI, |
