46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <fcntl.h>
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int main(int argc, char **argv) {
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char *addr;
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int port;
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int sock;
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struct sockaddr_in saddr;
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const struct linger nolinger = { .l_onoff = 1, .l_linger = 0 };
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if (argc < 4) {
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fprintf(stderr,
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"usage : %s <addr> <port> <string>\n"
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" This will connect to TCP port <addr>:<port> and send string <string>\n"
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" then immediately reset.\n",
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argv[0]);
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exit(1);
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}
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addr = argv[1];
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port = atoi(argv[2]);
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sock = socket(AF_INET, SOCK_STREAM, 0);
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bzero(&saddr, sizeof(saddr));
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saddr.sin_addr.s_addr = inet_addr(addr);
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saddr.sin_port = htons(port);
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saddr.sin_family = AF_INET;
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if (connect(sock, (struct sockaddr *)&saddr, sizeof(saddr)) < 0) {
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perror("connect");
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exit(1);
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}
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send(sock, argv[3], strlen(argv[3]), MSG_DONTWAIT | MSG_NOSIGNAL);
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setsockopt(sock, SOL_SOCKET, SO_LINGER, (struct linger *) &nolinger, sizeof(struct linger));
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close(sock);
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exit(0);
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}
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