VIDEOS: <\/p>\n","protected":false},"excerpt":{"rendered":" Socket Programming VIDEOS:Sockets ExplainedUDP in PhpUDP in Assembly Language (Linux x64)UDP in C (3 lines of code) UDP UDP server in PHP <?php $s=socket_create(AF_INET,SOCK_DGRAM,0); \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/create a UDP socket socket_bind($s,’0.0.0.0′,5555); \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/bind on all interfaces on port … Continue reading “Examples”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"_links":{"self":[{"href":"https:\/\/www.cs.ubbcluj.ro\/~radu.dragos\/wp-json\/wp\/v2\/pages\/736"}],"collection":[{"href":"https:\/\/www.cs.ubbcluj.ro\/~radu.dragos\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.cs.ubbcluj.ro\/~radu.dragos\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.cs.ubbcluj.ro\/~radu.dragos\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cs.ubbcluj.ro\/~radu.dragos\/wp-json\/wp\/v2\/comments?post=736"}],"version-history":[{"count":29,"href":"https:\/\/www.cs.ubbcluj.ro\/~radu.dragos\/wp-json\/wp\/v2\/pages\/736\/revisions"}],"predecessor-version":[{"id":928,"href":"https:\/\/www.cs.ubbcluj.ro\/~radu.dragos\/wp-json\/wp\/v2\/pages\/736\/revisions\/928"}],"wp:attachment":[{"href":"https:\/\/www.cs.ubbcluj.ro\/~radu.dragos\/wp-json\/wp\/v2\/media?parent=736"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
Sockets Explained<\/a>
UDP in Php<\/a>
UDP in Assembly Language (Linux x64)<\/a>
UDP in C (3 lines of code)<\/a><\/p>\nUDP<\/h2>\n
UDP server in PHP<\/h3>\n
<?php<\/strong>\n $s=socket_create(AF_INET,SOCK_DGRAM,0); \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<\/span><\/strong>\/\/create a UDP socket<\/span>\n socket_bind($s,'0.0.0.0',5555); \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<\/strong>\/\/bind on all interfaces on port 5555\n socket_recvfrom($s,$b,10,0,$client_ip,$client_port); \u00a0 \u00a0 <\/strong>\/\/read max 10 bytes from socket $s into buffer $b\n echo \"Received: \".$b.\" from IP=\".$client_ip.\":\".$client_port;<\/strong>\n socket_sendto($s,\"hello\",5,0,$client_ip,$client_port); \u00a0\u00a0<\/strong>\/\/send a message back to the client\n ?>\n<\/strong><\/pre>\nUDP client\u00a0in PHP<\/h3>\n
<?php\n$s=socket_create(AF_INET,SOCK_DGRAM,0); \/\/create a UDP socket\nsocket_sendto($s,\"hey\",3,0,\"127.0.0.1\",5555); \/\/send 3 bytes to the server\nsocket_recvfrom($s,$b,10,0,$serv_ip,$serv_port); \/\/read max 10 bytes from socket $s into buffer $b\necho \"Received: \".$b.\" from IP=\".$serv_ip.\":\".$serv_port;\n?><\/strong><\/pre>\n
\nUDP server in Python 2<\/h3>\n
import socket\ns=socket.socket(socket.AF_INET,socket.SOCK_DGRAM) \ns.bind((\"0.0.0.0\",5555)) \nbuff,addr=s.recvfrom(10) \nprint buff\ns.sendto(\"hello\", addr) \n<\/strong><\/pre>\n
UDP client in Python 2<\/h3>\n
import socket<\/strong>\ns=socket.socket(socket.AF_INET,socket.SOCK_DGRAM)\n<\/strong>\ns.sendto(\"hey\",(\"127.0.0.1\",5555)) <\/strong>\nprint s.recvfrom(10) <\/strong><\/pre>\n
UDP client in Python 3<\/h3>\n
import socket\ns=socket.socket(socket.AF_INET,socket.SOCK_DGRAM)\nmsg=\"hey\"\ns.sendto(str.encode(msg),(\"127.0.0.1\",5555))\nmsg,adr=s.recvfrom(10)\nprint (msg.decode())<\/pre>\n
UDP server in C<\/h3>\n
#include <netinet\/ip.h>\nchar buf[8] = \"xxxxxxxx\";\nint sfd,r;\nstruct sockaddr_in soc,csoc;\nmain (){\n int clen=sizeof(struct sockaddr_in);\n sfd = socket (AF_INET, SOCK_DGRAM, 0);\n \n soc.sin_family=AF_INET;\n soc.sin_port=htons(7777);\n soc.sin_addr.s_addr=inet_addr(\"0.0.0.0\");\n \n bind(sfd,&soc,sizeof(struct sockaddr_in));\nr=recvfrom (sfd,buf,100,0,&csoc,&clen);\nbuf[r]=0;\nprintf(\" %d %s\\n\",strlen(buf),buf);\n} <\/strong><\/pre>\nUDP client in C<\/h3>\n
\n#include <netinet\/ip.h>\nchar buf[8] = \"hello\";\nint sfd;\nstruct sockaddr_in soc;\nmain (){\n sfd=socket(AF_INET, SOCK_DGRAM, 0);\n \n soc.sin_family=AF_INET;\n soc.sin_port=htons(7777);\n soc.sin_addr.s_addr=inet_addr(\"127.0.0.1\");\n \n sendto (sfd,buf,strlen(buf),0,&soc,sizeof(struct sockaddr_in));\n}\n \n} <\/strong><\/pre>\nUDP client\u00a0in Java<\/h3>\n
import java.io.*;\nimport java.net.*;\n\nclass c\n{\n public static void main(String args[]) throws Exception\n {\n DatagramSocket clientSocket = new DatagramSocket();\n InetAddress IPAddress = InetAddress.getByName(\"localhost\");\n byte buf[] = new byte[5];\n String s=\"12345\";\n buf=s.getBytes();\n DatagramPacket sendPacket = new DatagramPacket(buf, 5, IPAddress, 5555);\n clientSocket.send(sendPacket);\n }\n}\n<\/pre>\n
\n\u00a0<\/h2>\n
TCP<\/strong><\/h2>\n
TCP server in PHP<\/h3>\n
<?php<\/strong>\n$s=socket_create(AF_INET,SOCK_STREAM,0);<\/strong>\nsocket_bind($s,\"0.0.0.0\",9999);<\/strong>\nsocket_listen($s);<\/strong>\n$cs=socket_accept($s);<\/strong>\nsocket_send($cs,\"Hello\",5,0);<\/strong>\n?>\n<\/strong><\/pre>\n
TCP client in PHP<\/h3>\n
<?php<\/strong>\n$s=socket_create(AF_INET,SOCK_STREAM,0);<\/strong>\nsocket_connect($s,\"127.0.0.1\",9999);<\/strong>\nsocket_recv($s,$buf,20,0);<\/strong>\necho $buf.\"\\n\";<\/strong>\n?>\n<\/strong><\/pre>\n
TCP server in Python 2<\/h3>\n
import socket\ns=socket.socket(socket.AF_INET,socket.SOCK_STREAM)\ns.bind((\"0.0.0.0\",7777))\ns.listen(5)\ncs,addr=s.accept()\nb=cs.recv(10)\nprint b\ncs.send(\"Hello\")\ncs.close()\n<\/pre>\n
TCP client in Python 2<\/h3>\n
import socket\ns=socket.socket(socket.AF_INET,socket.SOCK_STREAM)\ns.connect((\"127.0.0.1\",7777))\ns.send(\"Salut\")\nprint s.recv(10)\ns.close()\n\n<\/pre>\n
TCP multithreaded server in Python<\/h3>\n
import time\nimport socket\nfrom threading import Thread\ndef f(cs,i):\n print (\"Procesez client\"+str(i))\n b=cs.recv(10)\n time.sleep(10)\n cs.send(str(i))\n cs.close()\ns=socket.socket(socket.AF_INET,socket.SOCK_STREAM)\ns.bind((\"0.0.0.0\",7777))\ns.listen(5)\ni=0\nwhile (1==1):\n i=i+1\n cs,addr=s.accept()\n t=Thread(target=f,args=(cs,i,))\n t.start()\n\n<\/pre>\n\n\n
Python Multiplexed Chat Server \u2013 using select <\/h3>\n\n\n\n
import select, socket\ns= socket.socket(socket.AF_INET, socket.SOCK_STREAM)\ns.setblocking(0)\ns.bind(('0.0.0.0', 5555))\ns.listen(5)\n\nins = [s]\nouts = []\nmsg=[]\nwhile ins:\n r,w,e = select.select(ins,outs,ins)\n for ss in r:\n if ss==s:\n cs,addr=ss.accept()\n print \"Client from:\",addr\n ins.append(cs)\n else:\n print \"Data from client\"\n data=ss.recv(100)\n if data:\n txt=ss.getpeername()[0]+\":\"+str(ss.getpeername()[1])+\":\"+data\n print txt\n msg.append(txt)\n if ss not in outs:\n outs.append(ss)\n else :\n print \"Null data, client is gone\"\n ins.remove(ss)\n if ss in outs:\n outs.remove(ss)\n ss.close()\n for ss in e:\n print \"Error\"\n ins.remove (ss)\n if ss in outs:\n outs.remove(ss)\n ss.close()\n for ss in w:\n for i in msg:\n ss.send(i)\n msg=[]\n\n<\/pre>\n\n\n\nPython client for the Multiplexed Chat Server <\/h3>\n\n\n\n
import socket,os\r\ns=socket.socket(socket.AF_INET,socket.SOCK_STREAM)\r\ns.connect((\"127.0.0.1\",5555))\r\ns.send(\"Hello\")\r\nif os.fork()==0:\r\n while 1:\r\n print s.recv(100)\r\n exit(0)\r\nwhile 1:\r\n s.send(raw_input())\r\ns.close()\r\n<\/pre>\n\n\n\n