122 lines
3.3 KiB
C
122 lines
3.3 KiB
C
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/* this program is used to test UDP networking in Android.
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* used to debug the emulator's networking implementation
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*/
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#define PROGNAME "test_udp"
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#define DEFAULT_PORT 7000
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#include <arpa/inet.h>
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#include <netinet/in.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <unistd.h>
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#include <string.h>
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#define BUFLEN 512
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#define NPACK 10
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void diep(char *s)
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{
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perror(s);
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exit(1);
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}
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static void
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usage(int code)
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{
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printf("usage: %s [options]\n", PROGNAME);
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printf("options:\n");
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printf(" -p<port> use specific port (default %d)\n", DEFAULT_PORT);
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printf(" -a<inet> use specific IP address\n");
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printf(" -s run server (default is client)\n");
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exit(code);
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}
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int main(int argc, char** argv)
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{
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int runServer = 0;
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int udpPort = DEFAULT_PORT;
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int useLocal = 0;
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int address = htonl(INADDR_ANY);
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struct sockaddr_in si_me, si_other;
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int s, i, slen=sizeof(si_other);
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char buf[BUFLEN];
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while (argc > 1 && argv[1][0] == '-') {
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const char* optName = argv[1]+1;
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argc--;
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argv++;
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switch (optName[0]) {
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case 'p':
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udpPort = atoi(optName+1);
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if (udpPort < 1024 || udpPort > 65535) {
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fprintf(stderr, "UDP port must be between 1024 and 65535\n");
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exit(1);
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}
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break;
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case 's':
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runServer = 1;
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break;
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case 'a':
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if (inet_aton(optName+1, &si_other.sin_addr) == 0)
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diep("inet_aton");
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address = si_other.sin_addr.s_addr;
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break;
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default:
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usage(1);
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}
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}
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if (runServer) {
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if ((s=socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP))==-1)
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diep("socket");
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memset((char *) &si_me, 0, sizeof(si_me));
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si_me.sin_family = AF_INET;
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si_me.sin_port = htons(udpPort);
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si_me.sin_addr.s_addr = address;
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if (bind(s, (struct sockaddr*)&si_me, sizeof(si_me))==-1)
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diep("bind");
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printf("UDP server listening on %s:%d\n", inet_ntoa(si_me.sin_addr), udpPort);
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for (i=0; i<NPACK; i++) {
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if (recvfrom(s, buf, BUFLEN, 0, (struct sockaddr*)&si_other, (socklen_t*)&slen)==-1)
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diep("recvfrom()");
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printf("Received packet from %s:%d\nData: %s\n\n",
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inet_ntoa(si_other.sin_addr), ntohs(si_other.sin_port), buf);
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}
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printf("UDP server closing\n");
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close(s);
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}
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else /* !runServer */
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{
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if ((s=socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP))==-1)
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diep("socket");
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memset((char *) &si_other, 0, sizeof(si_other));
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si_other.sin_family = AF_INET;
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si_other.sin_port = htons(udpPort);
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si_other.sin_addr.s_addr = address;
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printf("UDP client sending packets to %s:%d\n", inet_ntoa(si_other.sin_addr), udpPort);
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for (i=0; i<NPACK; i++) {
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printf("Sending packet %d\n", i);
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sprintf(buf, "This is packet %d\n", i);
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if (sendto(s, buf, BUFLEN, 0, (struct sockaddr*)&si_other, slen)==-1)
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diep("sendto()");
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}
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close(s);
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printf("UDP client closing\n");
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}
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return 0;
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}
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