/**
* @brief Parse one line of TCP stats.
* This is a callback function which is called for each line parsed by
* parse_file_per_line() when parsing the <code>/proc/net/tcp6</code>.
* A line of information from /proc/net/tcp6 is parsed and interested components
* (src and dst addresses and ports, connection state and inode number) are
* extracted. The connection information is then inserted to system with
* insert_connection().
*
* @param line Line read from file.
* @param ctx Pointer to the main context.
*/
static void parse_connection6_data( char *line, void *ctx )
{
struct line_token *tokens_p;
struct sockaddr_storage local_addr, remote_addr;
int state;
#ifdef ENABLE_FOLLOW_PID
int wanted[NROF_WANTED_TOKENS] = { 2,3,4,10 };
#else
int wanted[NROF_WANTED_TOKENS] = { 2,3,4};
#endif /* ENABLE_FOLLOW_PID */
struct line_token tokens[NROF_WANTED_TOKENS];
struct parser_req req = {
.interested_tokens = wanted,
.interested_size = NROF_WANTED_TOKENS,
.tokens = tokens,
.token_count = NROF_WANTED_TOKENS
};
#ifdef ENABLE_FOLLOW_PID
ino_t inode;
#endif /* ENABLE_FOLLOW_PID */
char addrbuf[INET6_ADDRSTRLEN];
TRACE("Tokenizing\n" );
tokens_p = tokenize( &req, line );
TRACE("Done\n");
TRACE( "Building connection \n" );
if ( tokens_p == NULL ) {
WARN( "Error in generating interesting tokens \n" );
return;
}
memset( &local_addr, 0, sizeof( local_addr ) );
memset( &remote_addr, 0, sizeof( local_addr ) );
TRACE( "token 1:(%d)*%s*\n", tokens_p->token_len, tokens_p->token );
TRACE( "Decoding the local address \n" );
if ( token_to_addr6( tokens_p, (struct sockaddr_storage *)&local_addr ) != 0 ) {
WARN( "Error while parsing data, discarding connection! \n" );
return;
}
tokens_p = tokens_p->next;
TRACE( "token 2:(%d)*%s*\n", tokens_p->token_len, tokens_p->token );
TRACE( "Decoding the remote address \n" );
if ( token_to_addr6( tokens_p, (struct sockaddr_storage *)&remote_addr ) != 0 ) {
WARN( "Error while parsing data, discarding connection! \n" );
return;
}
tokens_p = tokens_p->next;
TRACE( "token 3:(%d)*%s*\n", tokens_p->token_len, tokens_p->token );
state = strtol( tokens_p->token, NULL, 16 );
TRACE( "State %d \n", state );
#ifdef ENABLE_FOLLOW_PID
tokens_p = tokens_p->next;
TRACE( "token 4:(%d)*%s*\n", tokens_p->token_len, tokens_p->token );
inode = strtol( tokens_p->token, NULL, 10 );
TRACE( "Inode %d \n", inode );
#endif /* ENABLE_FOLLOW_PID */
TRACE("Done\n" );
if ( tokens_p->next != NULL ) {
WARN( "Eccess elements in token structure \n" );
}
inet_ntop( local_addr.ss_family,
ss_get_addr6( &local_addr ),addrbuf, INET6_ADDRSTRLEN );
DBG( "Read local IPV6 address %s \n", addrbuf );
inet_ntop( remote_addr.ss_family,
ss_get_addr6( &remote_addr ), addrbuf, INET6_ADDRSTRLEN );
DBG( "Read remote IPV6 address %s \n", addrbuf );
#ifdef ENABLE_FOLLOW_PID
insert_connection( &local_addr, &remote_addr, state, inode, (struct stat_context *)ctx );
#else
insert_connection( &local_addr, &remote_addr, state, (struct stat_context *)ctx );
#endif /* ENABLE_FOLLOW_PID */
}
STATUS insert_dispatcher_connection(int socket)
{
return insert_connection(_connections, socket);
}
