protocols/tcp/tcp.cpp

84 bump_option(tcp_option *&option, size_t &length)
86 	if (option->kind <= TCP_OPTION_NOP) {
88 		option = (tcp_option *)((uint8 *)option + 1);
90 		length += option->length;
91 		option = (tcp_option *)((uint8 *)option + option->length);
102 	tcp_option *option = (tcp_option *)buffer;
106 		option->kind = TCP_OPTION_MAX_SEGMENT_SIZE;
107 		option->length = 4;
108 		option->max_segment_size = htons(segment.max_segment_size);
109 		bump_option(option, length);
116 			option->kind = TCP_OPTION_SACK_PERMITTED;
117 			option->length = 2;
118 			bump_option(option, length);
121 			option->kind = TCP_OPTION_NOP;
122 			bump_option(option, length);
123 			option->kind = TCP_OPTION_NOP;
124 			bump_option(option, length);
126 		option->kind = TCP_OPTION_TIMESTAMP;
127 		option->length = 10;
128 		option->timestamp.value = htonl(segment.timestamp_value);
129 		option->timestamp.reply = htonl(segment.timestamp_reply);
130 		bump_option(option, length);
134 		option->kind = TCP_OPTION_NOP;
135 		bump_option(option, length);
136 		option->kind = TCP_OPTION_NOP;
137 		bump_option(option, length);
138 		option->kind = TCP_OPTION_SACK_PERMITTED;
139 		option->length = 2;
140 		bump_option(option, length);
146 		option->kind = TCP_OPTION_NOP;
147 		bump_option(option, length);
149 		option->kind = TCP_OPTION_WINDOW_SHIFT;
150 		option->length = 3;
151 		option->window_shift = segment.window_shift;
152 		bump_option(option, length);
161 			option->kind = TCP_OPTION_NOP;
162 			bump_option(option, length);
163 			option->kind = TCP_OPTION_NOP;
164 			bump_option(option, length);
165 			option->kind = TCP_OPTION_SACK;
166 			option->length = 2 + sackCount * sizeof(tcp_sack);
167 			memcpy(option->sack, segment.sacks, sackCount * sizeof(tcp_sack));
168 			bump_option(option, length);
173 		// options completely fill out the option space
177 	option->kind = TCP_OPTION_END;
189 	tcp_option *option;
193 			(void **)&option) != B_OK) {
200 		option = (tcp_option *)optionsBuffer;
206 		switch (option->kind) {
212 				if (option->length == 4 && size >= 4)
213 					segment.max_segment_size = ntohs(option->max_segment_size);
216 				if (option->length == 3 && size >= 3) {
218 					segment.window_shift = option->window_shift;
222 				if (option->length == 10 && size >= 10) {
224 					segment.timestamp_value = ntohl(option->timestamp.value);
226 						ntohl(option->timestamp.reply);
230 				if (option->length == 2 && size >= 2)
234 				if (size >= option->length) {
236 					segment.sackCount = min_c((option->length - 2)
240 							option->sack[i].left_edge);
242 							option->sack[i].right_edge);
249 			length = option->length;
254 		option = (tcp_option *)((uint8 *)option + length);
540 tcp_control(net_protocol* _protocol, int level, int option, void* value,
546 		if (option == NET_STAT_SOCKET)
550 	return protocol->next->module->control(protocol->next, level, option,
556 tcp_getsockopt(net_protocol* _protocol, int level, int option, void* value,
562 		return protocol->GetOption(option, value, _length);
564 	return protocol->next->module->getsockopt(protocol->next, level, option,
570 tcp_setsockopt(net_protocol* _protocol, int level, int option,
576 		if (option == SO_SNDBUF || option == SO_RCVBUF) {
583 			if (option == SO_SNDBUF)
592 		return protocol->SetOption(option, _value, length);
594 	return protocol->next->module->setsockopt(protocol->next, level, option,