/*
* Generate a DNS id
*/
static uint16_t
DNSGenerateID(void)
{
static uint16_t id = 0;
struct timeval now;
pal_gettimeofday(&now);
if (!id)
id = (uint16_t) (0xffff & (now.tv_sec ^ now.tv_usec ^ pal_getpid()));
else
id += 1 + (uint16_t)(now.tv_usec % 263);
return id;
}
// --------------------------------------------------------------------------
// IEE_init: ICMP Echo Engine initialisation routine.
//
// Parameters:
// pp_config: Opaque double pointer to a ICMP_ECHO_ENGINE_PARMS structure.
// eng_mode: The mode of the ICMP Echo Engine.
// send_interval: Fixed interval, in miliseconds, at which ICMP echo
// requests will be issued.
// echo_num: Number of ICMP echo requests to issue(0=infinite).
// echo_timeout: Number of miliseconds after which an unanswered ICMP
// echo request will be marked as timed out.
// echo_timeout_threshold: Number of consecutive timed-out ICMP echo
// requests to declare a general echo timeout.
// src: Source address used for sending ICMP echo requests.
// dst: Destination address at which ICMP echo requests will be sent.
// family: address family (INET or INET6)
//
// Return values:
// IEE_SUCCESS on success.
// IEE_INVALID_PARMS if invalid pp_config.
//
iee_ret_t IEE_init( void** pp_config, iee_mode_t eng_mode,
uint32_t send_interval, uint32_t echo_num,
uint32_t echo_timeout, uint8_t echo_timeout_threshold,
char* src, char* dst, sint32_t af,
iee_send_clbk send_clbk, iee_recv_clbk recv_clbk )
{
PICMP_ECHO_ENGINE_PARMS p_engine = NULL;
// Verify input parameters.
if( pp_config == NULL || *pp_config != NULL || dst == NULL )
{
// Error: bad input parameters.
return IEE_INVALID_PARMS;
}
// Reserve memory for the engine parameters
*pp_config = pal_malloc( sizeof(ICMP_ECHO_ENGINE_PARMS) );
p_engine = (PICMP_ECHO_ENGINE_PARMS)*pp_config;
if( p_engine == NULL )
{
// Error: Not enough memory for structure.
return IEE_RESOURCE_STARVATION;
}
// Initialize engine structure with input parameters.
memset( p_engine, 0, sizeof(ICMP_ECHO_ENGINE_PARMS) );
p_engine->send_interval = send_interval;
p_engine->echo_num = echo_num;
p_engine->echo_timeout = echo_timeout; // Not used in ACD
p_engine->echo_timeout_threshold = echo_timeout_threshold;
p_engine->eng_mode = eng_mode;
// Initialize engine variables.
p_engine->eng_ongoing = 1;
p_engine->count_send = 0;
p_engine->count_late = 0;
p_engine->count_ontime = 0;
p_engine->count_consec_late = 0;
p_engine->event_list = NULL;
// Set engine callback functions.
p_engine->clbk_send = send_clbk;
p_engine->clbk_recv = recv_clbk;
// Initialize engine socket variables.
p_engine->icmp_echo_id = pal_getpid();
p_engine->icmp_saf = af;
switch( p_engine->icmp_saf )
{
case AF_INET:
if( pal_inet_pton( AF_INET, src, &p_engine->echo_addr_src.in4.sin_addr ) <= 0 )
{
// Bad IPv4 address in 'src'.
pal_free( p_engine );
return IEE_INVALID_PARMS;
}
p_engine->echo_addr_src.in4.sin_family = AF_INET;
if( pal_inet_pton( AF_INET, dst, &p_engine->echo_addr_dst.in4.sin_addr ) <= 0 )
{
// Bad IPv4 address in 'dst'.
pal_free( p_engine );
return IEE_INVALID_PARMS;
}
p_engine->echo_addr_dst.in4.sin_family = AF_INET;
p_engine->icmp_sfd = pal_socket( AF_INET, SOCK_RAW, IPPROTO_ICMP );
break;
case AF_INET6:
if( pal_inet_pton( AF_INET6, src, &p_engine->echo_addr_src.in6.sin6_addr ) <= 0 )
{
// Bad IPv6 address in 'src'.
pal_free( p_engine );
return IEE_INVALID_PARMS;
}
p_engine->echo_addr_src.in6.sin6_family = AF_INET6;
if( pal_inet_pton( AF_INET6, dst, &p_engine->echo_addr_dst.in6.sin6_addr ) <= 0 )
{
// Bad IPv6 address in 'dst'.
pal_free( p_engine );
return IEE_INVALID_PARMS;
}
p_engine->echo_addr_dst.in6.sin6_family = AF_INET6;
p_engine->icmp_sfd = pal_socket( AF_INET6, SOCK_RAW, IPPROTO_ICMPV6 );
break;
default:
// ERROR! Bad address family!
pal_free( p_engine );
return IEE_INVALID_PARMS;
}
// Verify that the socket created is valid.
if( p_engine->icmp_sfd == -1 )
{
// Failed to open a socket descriptor.
pal_free( p_engine );
return IEE_GENERAL_ECHO_ERROR;
}
return IEE_SUCCESS;
}