diff options
Diffstat (limited to 'drivers/net/netconsole.c')
| -rw-r--r-- | drivers/net/netconsole.c | 135 |
1 files changed, 101 insertions, 34 deletions
diff --git a/drivers/net/netconsole.c b/drivers/net/netconsole.c index 14243b8..dd7032a 100644 --- a/drivers/net/netconsole.c +++ b/drivers/net/netconsole.c @@ -28,7 +28,11 @@ DECLARE_GLOBAL_DATA_PTR; -static char input_buffer[512]; +#ifndef CONFIG_NETCONSOLE_BUFFER_SIZE +#define CONFIG_NETCONSOLE_BUFFER_SIZE 512 +#endif + +static char input_buffer[CONFIG_NETCONSOLE_BUFFER_SIZE]; static int input_size; /* char count in input buffer */ static int input_offset; /* offset to valid chars in input buffer */ static int input_recursion; @@ -36,9 +40,15 @@ static int output_recursion; static int net_timeout; static uchar nc_ether[6]; /* server enet address */ static IPaddr_t nc_ip; /* server ip */ -static short nc_port; /* source/target port */ +static short nc_out_port; /* target output port */ +static short nc_in_port; /* source input port */ static const char *output_packet; /* used by first send udp */ static int output_packet_len; +/* + * Start with a default last protocol. + * We are only interested in NETCONS or not. + */ +enum proto_t net_loop_last_protocol = BOOTP; static void nc_wait_arp_handler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src, @@ -59,8 +69,69 @@ static void nc_timeout(void) net_set_state(NETLOOP_SUCCESS); } +static int is_broadcast(IPaddr_t ip) +{ + static IPaddr_t netmask; + static IPaddr_t our_ip; + static int env_changed_id; + int env_id = get_env_id(); + + /* update only when the environment has changed */ + if (env_changed_id != env_id) { + netmask = getenv_IPaddr("netmask"); + our_ip = getenv_IPaddr("ipaddr"); + + env_changed_id = env_id; + } + + return (ip == ~0 || /* 255.255.255.255 */ + ((netmask & our_ip) == (netmask & ip) && /* on the same net */ + (netmask | ip) == ~0)); /* broadcast to our net */ +} + +static int refresh_settings_from_env(void) +{ + const char *p; + static int env_changed_id; + int env_id = get_env_id(); + + /* update only when the environment has changed */ + if (env_changed_id != env_id) { + if (getenv("ncip")) { + nc_ip = getenv_IPaddr("ncip"); + if (!nc_ip) + return -1; /* ncip is 0.0.0.0 */ + p = strchr(getenv("ncip"), ':'); + if (p != NULL) { + nc_out_port = simple_strtoul(p + 1, NULL, 10); + nc_in_port = nc_out_port; + } + } else + nc_ip = ~0; /* ncip is not set, so broadcast */ + + p = getenv("ncoutport"); + if (p != NULL) + nc_out_port = simple_strtoul(p, NULL, 10); + p = getenv("ncinport"); + if (p != NULL) + nc_in_port = simple_strtoul(p, NULL, 10); + + if (is_broadcast(nc_ip)) + /* broadcast MAC address */ + memset(nc_ether, 0xff, sizeof(nc_ether)); + else + /* force arp request */ + memset(nc_ether, 0, sizeof(nc_ether)); + } + return 0; +} + +/** + * Called from NetLoop in net/net.c before each packet + */ void NcStart(void) { + refresh_settings_from_env(); if (!output_packet_len || memcmp(nc_ether, NetEtherNullAddr, 6)) { /* going to check for input packet */ net_set_udp_handler(nc_handler); @@ -71,18 +142,22 @@ void NcStart(void) net_set_arp_handler(nc_wait_arp_handler); pkt = (uchar *)NetTxPacket + NetEthHdrSize() + IP_UDP_HDR_SIZE; memcpy(pkt, output_packet, output_packet_len); - NetSendUDPPacket(nc_ether, nc_ip, nc_port, nc_port, + NetSendUDPPacket(nc_ether, nc_ip, nc_out_port, nc_in_port, output_packet_len); } } -int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len) +int nc_input_packet(uchar *pkt, IPaddr_t src_ip, unsigned dest_port, + unsigned src_port, unsigned len) { int end, chunk; - if (dest != nc_port || !len) + if (dest_port != nc_in_port || !len) return 0; /* not for us */ + if (src_ip != nc_ip && !is_broadcast(nc_ip)) + return 0; /* not from our client */ + debug_cond(DEBUG_DEV_PKT, "input: \"%*.*s\"\n", len, len, pkt); if (input_size == sizeof(input_buffer)) @@ -131,47 +206,39 @@ static void nc_send_packet(const char *buf, int len) } if (eth->state != ETH_STATE_ACTIVE) { - if (eth_init(gd->bd) < 0) - return; + if (eth_is_on_demand_init()) { + if (eth_init(gd->bd) < 0) + return; + eth_set_last_protocol(NETCONS); + } else + eth_init_state_only(gd->bd); + inited = 1; } pkt = (uchar *)NetTxPacket + NetEthHdrSize() + IP_UDP_HDR_SIZE; memcpy(pkt, buf, len); ether = nc_ether; ip = nc_ip; - NetSendUDPPacket(ether, ip, nc_port, nc_port, len); + NetSendUDPPacket(ether, ip, nc_out_port, nc_in_port, len); - if (inited) - eth_halt(); + if (inited) { + if (eth_is_on_demand_init()) + eth_halt(); + else + eth_halt_state_only(); + } } static int nc_start(void) { - int netmask, our_ip; - - nc_port = 6666; /* default port */ - - if (getenv("ncip")) { - char *p; - - nc_ip = getenv_IPaddr("ncip"); - if (!nc_ip) - return -1; /* ncip is 0.0.0.0 */ - p = strchr(getenv("ncip"), ':'); - if (p != NULL) - nc_port = simple_strtoul(p + 1, NULL, 10); - } else - nc_ip = ~0; /* ncip is not set */ + int retval; - our_ip = getenv_IPaddr("ipaddr"); - netmask = getenv_IPaddr("netmask"); + nc_out_port = 6666; /* default port */ + nc_in_port = nc_out_port; - if (nc_ip == ~0 || /* 255.255.255.255 */ - ((netmask & our_ip) == (netmask & nc_ip) && /* on the same net */ - (netmask | nc_ip) == ~0)) /* broadcast to our net */ - memset(nc_ether, 0xff, sizeof(nc_ether)); - else - memset(nc_ether, 0, sizeof(nc_ether)); /* force arp request */ + retval = refresh_settings_from_env(); + if (retval != 0) + return retval; /* * Initialize the static IP settings and buffer pointers @@ -203,7 +270,7 @@ static void nc_puts(const char *s) len = strlen(s); while (len) { - int send_len = min(len, 512); + int send_len = min(len, sizeof(input_buffer)); nc_send_packet(s, send_len); len -= send_len; s += send_len; |