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| Rev | Author | Line No. | Line |
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| 1616 | boinc | 1 | /* |
| 2 | * Project: S.Ha.R.K. |
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| 3 | * |
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| 4 | * Coordinators: |
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| 5 | * Giorgio Buttazzo <giorgio@sssup.it> |
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| 6 | * Paolo Gai <pj@gandalf.sssup.it> |
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| 7 | * |
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| 8 | * Authors : |
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| 9 | * Tullio Facchinetti <tullio.facchinetti@unipv.it> |
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| 10 | * Luca M. Capisani <luca.capisani@unipv.it> |
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| 11 | * |
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| 12 | * Robotic Lab (Dipartimento di ingegneria informatica - Pavia - Italy) |
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| 13 | * |
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| 14 | * http://robot.unipv.it |
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| 15 | * http://www.sssup.it |
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| 16 | * http://retis.sssup.it |
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| 17 | * http://shark.sssup.it |
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| 18 | */ |
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| 19 | |||
| 20 | /* |
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| 21 | * udp_notify demo: this simple demo shows how to set up a simple UDP/IP |
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| 22 | * packet handler function in order to avoid busy waits or task creation |
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| 23 | * for the packet receiver function. |
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| 24 | * usage: after compiling this demo, with the "make" command, start it with: |
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| 25 | * x net <loc_ip> <loc_port> |
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| 26 | * where <loc_ip> stands for the local ip of the receiver host and |
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| 27 | * <loc_port> stands for the local UDP port where the receiver listens. |
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| 28 | */ |
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| 29 | |||
| 30 | /* |
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| 31 | * This program is free software; you can redistribute it and/or modify |
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| 32 | * it under the terms of the GNU General Public License as published by |
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| 33 | * the Free Software Foundation; either version 2 of the License, or |
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| 34 | * (at your option) any later version. |
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| 35 | * |
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| 36 | * This program is distributed in the hope that it will be useful, |
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| 37 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 38 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 39 | * GNU General Public License for more details. |
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| 40 | * |
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| 41 | * You should have received a copy of the GNU General Public License |
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| 42 | * along with this program; if not, write to the Free Software |
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| 43 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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| 44 | * |
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| 45 | */ |
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| 46 | |||
| 47 | #include <kernel/kern.h> |
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| 48 | #include <drivers/udpip.h> |
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| 49 | #include <string.h> //for strcpy() |
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| 50 | #include <unistd.h> //for sleep() |
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| 51 | #include "drivers/shark_keyb26.h" //for keyboard |
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| 52 | |||
| 53 | |||
| 54 | //Received Packet Counter |
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| 55 | long recvcount=0; |
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| 56 | |||
| 57 | //The Internet Address of this Host |
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| 58 | char local_ip[20]; |
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| 59 | |||
| 60 | //A index for the receiver socket |
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| 61 | int socket; |
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| 62 | |||
| 63 | //Declaring a structure containing the receiver UDP port |
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| 64 | UDP_ADDR local; |
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| 65 | |||
| 66 | //UDP receiver handler: this function is called upon UDP packet received. |
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| 67 | //No Busy waits are present. |
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| 68 | int recvFun(int len, unsigned char *buff, void *p){ |
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| 69 | |||
| 70 | recvcount++; |
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| 71 | |||
| 72 | //Printing on screen the data contained, assuming that is text data |
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| 73 | cprintf("Packet # %ld, len %d: %s.\n",recvcount, len,buff); |
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| 74 | |||
| 75 | return 1; |
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| 76 | } |
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| 77 | |||
| 78 | /* Init the network stack */ |
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| 79 | int init_network(char *local_ip) |
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| 80 | { |
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| 81 | //Declaring a network model and asigning the UDP/IP model; |
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| 82 | struct net_model m = net_base; |
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| 83 | |||
| 84 | |||
| 85 | //Setting up the UDP/IP stack, assigning a UDP/IP/Ethernet Network Model, |
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| 86 | //a host and a network broadcast address. |
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| 87 | net_setudpip(m,local_ip,"255.255.255.0"); |
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| 88 | |||
| 89 | //Initializing the network stack |
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| 90 | if (net_init(&m) != 1) { |
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| 91 | cprintf("Network: Init Error.\n"); |
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| 92 | return -1; |
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| 93 | } |
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| 94 | |||
| 95 | |||
| 96 | //Binding of the UDP port in the system network stack |
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| 97 | //without assigning a peer IP-list in the second parameter |
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| 98 | socket = udp_bind(&local, NULL); |
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| 99 | |||
| 100 | //Assigning a receiver notify handler called on packed received |
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| 101 | udp_notify(socket, &recvFun,NULL); |
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| 102 | |||
| 103 | return 0; |
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| 104 | |||
| 105 | } |
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| 106 | |||
| 107 | void program_key_end(KEY_EVT* e) |
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| 108 | { |
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| 109 | exit(1); |
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| 110 | } |
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| 111 | |||
| 112 | |||
| 113 | int main(int argc, char **argv) |
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| 114 | { |
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| 115 | //Assigning a CTRL+C exit key shortcut |
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| 116 | KEY_EVT k; |
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| 117 | k.flag = CNTL_BIT; |
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| 118 | k.scan = KEY_C; |
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| 119 | k.ascii = 'c'; |
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| 120 | k.status = KEY_PRESSED; |
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| 121 | keyb_hook(k,program_key_end,FALSE); |
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| 122 | |||
| 123 | if (argc==3){ |
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| 124 | //Copy the input parameters values into the UDP/IP stack |
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| 125 | strcpy(local_ip, argv[1]); |
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| 126 | |||
| 127 | //A local UDP port number where the receiver listens |
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| 128 | local.s_port=atoi(argv[2]); |
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| 129 | }else{ |
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| 130 | //The user has given a wrong number of parameters: |
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| 131 | cprintf("S.Ha.R.K. udp_notify usage: x net <localIP> <localUDPport>\n"); |
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| 132 | return(1); |
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| 133 | } |
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| 134 | |||
| 135 | cprintf("Initializing the network stack... \n"); |
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| 136 | |||
| 137 | //Initializing the network settings |
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| 138 | if (init_network(local_ip)) exit(1); |
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| 139 | |||
| 140 | cprintf("Waiting for packets on port %d... \n",local.s_port); |
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| 141 | |||
| 142 | //Waiting for packets |
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| 143 | while(1){ |
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| 144 | sleep(1); |
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| 145 | } |
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| 146 | |||
| 147 | |||
| 148 | return 0; |
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| 149 | } |