/* handle an incoming packet, acking it if it is a data packet for us
* returns the message length > 0 if this was a valid data message from a peer.
* if it gets a valid key, returns -1 (details below)
* Otherwise returns 0 and does not fill in any of the following results.
*
* if it is a data or ack, it is saved in the xchat log
* if it is a valid data message from a peer or a broadcaster,
* fills in verified and broadcast
* fills in contact, message (to point to malloc'd buffers, must be freed)
* if not broadcast, fills in desc (also malloc'd), sent (if not null)
* and duplicate.
* if verified and not broadcast, fills in kset.
* the data message (if any) is null-terminated
*
* if kcontact and ksecret1 are not NULL, assumes we are also looking
* for key exchange messages sent to us matching either of ksecret1 or
* (if not NULL) ksecret2. If such a key is found, returns -1.
* there are two ways of calling this:
* - if the user specified the peer's secret, first send initial key,
* then call handle_packet with our secret in ksecret1 and our
* peer's secret in ksecret2.
* - otherwise, put our secret in ksecret1, make ksecret2 and kaddr NULL,
* and handle_packet is ready to receive a key.
* In either case, if a matching key is received, it is saved and a
* response is sent (if a response is a duplicate, it does no harm).
* kmax_hops specifies the maximum hop count of incoming acceptable keys,
* and the hop count used in sending the key.
*
* if subscription is not null, listens for a reply containing a key
* matching the subscription, returning -2 if a match is found.
*/
int handle_packet (int sock, char * packet, int psize,
char ** contact, keyset * kset,
char ** message, char ** desc,
int * verified, time_t * sent,
int * duplicate, int * broadcast,
char * kcontact, char * ksecret1, char * ksecret2,
int kmax_hops,
char * subscription,
unsigned char * addr, int nbits)
{
if (! is_valid_message (packet, psize))
return 0;
struct allnet_header * hp = (struct allnet_header *) packet;
int hsize = ALLNET_SIZE (hp->transport);
if (psize < hsize)
return 0;
#ifdef DEBUG_PRINT
if (hp->hops > 0) /* not my own packet */
print_packet (packet, psize, "xcommon received", 1);
#endif /* DEBUG_PRINT */
if (hp->message_type == ALLNET_TYPE_ACK) {
handle_ack (sock, packet, psize, hsize);
return 0;
}
if (hp->message_type == ALLNET_TYPE_CLEAR) { /* a broadcast packet */
if ((subscription != NULL) && (addr != NULL)) {
int sub = handle_sub (sock, hp, packet + hsize, psize - hsize,
subscription, addr, nbits);
#ifdef DEBUG_PRINT
printf ("handle_sub (%d, %p, %p, %d, %s, %p, %d) ==> %d\n",
sock, hp, packet + hsize, psize - hsize, subscription,
addr, nbits, sub);
#endif /* DEBUG_PRINT */
if (sub > 0) /* received a key in response to our subscription */
return sub;
}
#ifdef DEBUG_PRINT
else
printf ("subscription %p, addr %p, did not call handle_sub\n",
subscription, addr);
#endif /* DEBUG_PRINT */
return handle_clear (hp, packet + hsize, psize - hsize,
contact, message, verified, broadcast);
}
if (hp->message_type == ALLNET_TYPE_DATA) /* an encrypted data packet */
return handle_data (sock, hp, packet + hsize, psize - hsize,
contact, kset, message, desc, verified, sent,
duplicate, broadcast);
if (hp->message_type == ALLNET_TYPE_KEY_XCHG)
return handle_key (sock, hp, packet + hsize, psize - hsize,
kcontact, ksecret1, ksecret2, kmax_hops);
return 0;
}
virtual status visit(const sub &node) {
return handle_sub(node);
}
void handle(node *n) {
if (n->type == type_id) {
vlog("[code_gen] handle: identifier\n");
handle_identifier(n);
} else if (n->type == type_con) {
vlog("[code_gen] handle: constant\n");
handle_constant(n);
} else if (n->type == type_string) {
vlog("[code_gen] handle: string constant\n");
handle_string(n);
} else {
if (strcmp(n->id,"postfix_expr") == 0) {
vlog("[code_gen] handle: postfix_expr \n");
handle_postfix_expr(n);
} else if (strcmp(n->id,"argument_expr_list") == 0) {
vlog("[code_gen] handle: argument_expr_list \n");
handle_argument_expr_list(n);
} else if (strcmp(n->id,"unary_expr") == 0) {
vlog("[code_gen] handle: unary_expr \n");
handle_unary_expr(n);
} else if (strcmp(n->id,"sizeof") == 0) {
vlog("[code_gen] handle: sizeof \n");
handle_sizeof(n);
} else if (strcmp(n->id,"cast_expr") == 0) {
vlog("[code_gen] handle: cast_expr \n");
handle_cast_expr(n);
} else if (strcmp(n->id,"multiply") == 0) {
vlog("[code_gen] handle: multiply \n");
handle_multiply(n);
} else if (strcmp(n->id,"divide") == 0) {
vlog("[code_gen] handle: divide \n");
handle_divide(n);
} else if (strcmp(n->id,"mod") == 0) {
vlog("[code_gen] handle: mod \n");
handle_mod(n);
} else if (strcmp(n->id,"add") == 0) {
vlog("[code_gen] handle: add \n");
handle_add(n);
} else if (strcmp(n->id,"sub") == 0) {
vlog("[code_gen] handle: sub \n");
handle_sub(n);
} else if (strcmp(n->id,"shift_left") == 0) {
vlog("[code_gen] handle: shift_left \n");
handle_shift_left(n);
} else if (strcmp(n->id,"shift_right") == 0) {
vlog("[code_gen] handle: shift_right \n");
handle_shift_right(n);
} else if (strcmp(n->id,"less_than") == 0) {
vlog("[code_gen] handle: less_than \n");
handle_less_than(n);
} else if (strcmp(n->id,"greater_than") == 0) {
vlog("[code_gen] handle: greater_than \n");
handle_greater_than(n);
} else if (strcmp(n->id,"less_equal_than") == 0) {
vlog("[code_gen] handle: less_equal_than \n");
handle_less_equal_than(n);
} else if (strcmp(n->id,"greater_equal_than") == 0) {
vlog("[code_gen] handle: greater_equal_than \n");
handle_greater_equal_than(n);
} else if (strcmp(n->id,"equality") == 0) {
vlog("[code_gen] handle: equality \n");
handle_equality(n);
} else if (strcmp(n->id,"equality_not") == 0) {
vlog("[code_gen] handle: equality_not \n");
handle_equality_not(n);
} else if (strcmp(n->id,"bitwise_and") == 0) {
vlog("[code_gen] handle: bitwise_and \n");
handle_bitwise_and(n);
} else if (strcmp(n->id,"bitwise_xor") == 0) {
vlog("[code_gen] handle: bitwise_xor \n");
handle_bitwise_xor(n);
} else if (strcmp(n->id,"bitwise_or") == 0) {
vlog("[code_gen] handle: bitwise_or \n");
handle_bitwise_or(n);
} else if (strcmp(n->id,"logical_and") == 0) {
vlog("[code_gen] handle: logical_and \n");
handle_logical_and(n);
} else if (strcmp(n->id,"logical_or") == 0) {
vlog("[code_gen] handle: logical_or \n");
handle_logical_or(n);
} else if (strcmp(n->id,"conditional") == 0) {
vlog("[code_gen] handle: conditional \n");
handle_conditional(n);
} else if (strcmp(n->id,"assignment") == 0) {
vlog("[code_gen] handle: assignment \n");
handle_assignment(n);
} else if (strcmp(n->id,"expression") == 0) {
vlog("[code_gen] handle: expression \n");
handle_expression(n);
} else if (strcmp(n->id,"declaration") == 0) {
vlog("[code_gen] handle: declaration \n");
handle_declaration(n);
} else if (strcmp(n->id,"declaration_specifier") == 0) {
vlog("[code_gen] handle: declaration_specifier \n");
handle_declaration_specifier(n);
} else if (strcmp(n->id,"init_declarator_list") == 0) {
vlog("[code_gen] handle: init_declarator_list \n");
handle_init_declarator_list(n);
} else if (strcmp(n->id,"init_declarator") == 0) {
vlog("[code_gen] handle: init_declarator \n");
handle_init_declarator(n);
} else if (strcmp(n->id,"struct_union") == 0) {
vlog("[code_gen] handle: struct_union \n");
handle_struct_union(n);
} else if (strcmp(n->id,"struct_declaration_list") == 0) {
vlog("[code_gen] handle: struct_declaration_list \n");
handle_struct_declaration_list(n);
} else if (strcmp(n->id,"struct_declaration") == 0) {
vlog("[code_gen] handle: struct_declaration \n");
handle_struct_declaration(n);
} else if (strcmp(n->id,"specifier_qualifier_list") == 0) {
vlog("[code_gen] handle: specifier_qualifier_list \n");
handle_specifier_qualifier_list(n);
} else if (strcmp(n->id,"struct_declarator_list") == 0) {
vlog("[code_gen] handle: struct_declarator_list \n");
handle_struct_declarator_list(n);
} else if (strcmp(n->id,"struct_declarator") == 0) {
vlog("[code_gen] handle: struct_declarator \n");
handle_struct_declarator(n);
} else if (strcmp(n->id,"enum_specifier") == 0) {
vlog("[code_gen] handle: enum_specifier \n");
handle_enum_specifier(n);
} else if (strcmp(n->id,"enum_list") == 0) {
vlog("[code_gen] handle: enum_list \n");
handle_enum_list(n);
} else if (strcmp(n->id,"enumerator") == 0) {
vlog("[code_gen] handle: enumerator \n");
handle_enumerator(n);
} else if (strcmp(n->id,"declarator") == 0) {
vlog("[code_gen] handle: declarator \n");
handle_declarator(n);
} else if (strcmp(n->id,"direct_declarator") == 0) {
vlog("[code_gen] handle: direct_declarator \n");
handle_direct_declarator(n);
} else if (strcmp(n->id,"pointer") == 0) {
vlog("[code_gen] handle: pointer \n");
handle_pointer(n);
} else if (strcmp(n->id,"type_qualifier_list") == 0) {
vlog("[code_gen] handle: type_qualifier_list \n");
handle_type_qualifier_list(n);
} else if (strcmp(n->id,"parameter_type_list") == 0) {
vlog("[code_gen] handle: parameter_type_list \n");
handle_parameter_type_list(n);
} else if (strcmp(n->id,"parameter_list") == 0) {
vlog("[code_gen] handle: parameter_list \n");
handle_parameter_list(n);
} else if (strcmp(n->id,"parameter_declaration") == 0) {
vlog("[code_gen] handle: parameter_declaration \n");
handle_parameter_declaration(n);
} else if (strcmp(n->id,"identifier_list") == 0) {
vlog("[code_gen] handle: identifier_list \n");
handle_identifier_list(n);
} else if (strcmp(n->id,"type_name") == 0) {
vlog("[code_gen] handle: type_name \n");
handle_type_name(n);
} else if (strcmp(n->id,"abstract_declarator") == 0) {
vlog("[code_gen] handle: abstract_declarator \n");
handle_abstract_declarator(n);
} else if (strcmp(n->id,"direct_abstract_declarator") == 0) {
vlog("[code_gen] handle: direct_abstract_declarator \n");
handle_direct_abstract_declarator(n);
} else if (strcmp(n->id,"initializer") == 0) {
vlog("[code_gen] handle: initializer \n");
handle_initializer(n);
} else if (strcmp(n->id,"initializer_list") == 0) {
vlog("[code_gen] handle: initializer_list \n");
handle_initializer_list(n);
} else if (strcmp(n->id,"labeled_statement") == 0) {
vlog("[code_gen] handle: labeled_statement \n");
handle_labeled_statement(n);
} else if (strcmp(n->id,"compound_statement") == 0) {
vlog("[code_gen] handle: compound_statement \n");
handle_compound_statement(n);
} else if (strcmp(n->id,"declaration_list") == 0) {
vlog("[code_gen] handle: declaration_list \n");
handle_declaration_list(n);
} else if (strcmp(n->id,"statement_list") == 0) {
vlog("[code_gen] handle: statement_list \n");
handle_statement_list(n);
} else if (strcmp(n->id,"expression_statement") == 0) {
vlog("[code_gen] handle: expression_statement \n");
handle_expression_statement(n);
} else if (strcmp(n->id,"selection_statement") == 0) {
vlog("[code_gen] handle: selection_statement \n");
handle_selection_statement(n);
} else if (strcmp(n->id,"iteration_statement") == 0) {
vlog("[code_gen] handle: iteration_statement \n");
handle_iteration_statement(n);
} else if (strcmp(n->id,"jump_statement") == 0) {
vlog("[code_gen] handle: jump_statement \n");
handle_jump_statement(n);
} else if (strcmp(n->id,"translation_unit") == 0) {
vlog("[code_gen] handle: translation_unit \n");
handle_translation_unit(n);
} else if (strcmp(n->id,"function_definition") == 0) {
vlog("[code_gen] handle: function_definition \n");
handle_function_definition(n);
} else if (strcmp(n->id,"asm") == 0) {
vlog("[code_gen] handle: inline_assembly \n");
handle_asm(n);
}
}
}
