From 7e0f021a9aec35fd8e6725e87e3313b101d26f5e Mon Sep 17 00:00:00 2001 From: Tobias Klauser Date: Sun, 27 Jan 2008 11:37:44 +0100 Subject: Initial import (2.0.2-6) --- reference/C/CONTRIB/OR_USING_C/12.2.c | 126 ++++++++++++++++++++++++++++++++++ 1 file changed, 126 insertions(+) create mode 100644 reference/C/CONTRIB/OR_USING_C/12.2.c (limited to 'reference/C/CONTRIB/OR_USING_C/12.2.c') diff --git a/reference/C/CONTRIB/OR_USING_C/12.2.c b/reference/C/CONTRIB/OR_USING_C/12.2.c new file mode 100644 index 0000000..ed64580 --- /dev/null +++ b/reference/C/CONTRIB/OR_USING_C/12.2.c @@ -0,0 +1,126 @@ +/* + * Connects to port 1234 on the local host. + */ +#include +#include +#include +#include +#include + +#define NSTRS 3 /* no. of strings */ + +/* + * Strings we send to the client. + */ +char *strs[NSTRS] = { + "This is the first string from the server.\n", + "This is the second string from the server.\n", + "This is the third string from the server.\n" +}; + +extern int errno; + +main() +{ + char c; + FILE *fp; + int fromlen; + char hostname[64]; + struct hostent *hp; + register int i, s, ns; + struct sockaddr_in sin, fsin; + + /* + * Before we can do anything, we need + * to know our hostname. + */ + gethostname(hostname, sizeof(hostname)); + + /* + * Now we look up our host to get + * its network number. + */ + if ((hp = gethostbyname(hostname)) == NULL) { + fprintf(stderr, "%s: host unknown.\n", hostname); + exit(1); + } + + /* + * Get a socket to work with. This socket will + * be in the Internet domain, and will be a + * stream socket. + */ + if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0) { + perror("server: socket"); + exit(1); + } + + /* + * Create the address that we will be binding to. + * We use port 1234 but put it into network + * byte order. Also, we use bcopy (see + * Chapter 14) to copy the network number. + */ + sin.sin_family = AF_INET; + sin.sin_port = htons(1234); + bcopy(hp->h_addr, &sin.sin_addr, hp->h_length); + + /* + * Try to bind the address to the socket. + */ + if (bind(s, &sin, sizeof(sin)) < 0) { + perror("server: bind"); + exit(1); + } + + /* + * Listen on the socket. + */ + if (listen(s, 5) < 0) { + perror("server: listen"); + exit(1); + } + + /* + * Accept connections. When we accept one, ns + * will be connected to the client. fsin will + * contain the address of the client. + */ + if ((ns = accept(s, &fsin, &fromlen)) < 0) { + perror("server: accept"); + exit(1); + } + + /* + * We'll use stdio for reading the socket. + */ + fp = fdopen(ns, "r"); + + /* + * First we send some strings to the client. + */ + for (i = 0; i < NSTRS; i++) + send(ns, strs[i], strlen(strs[i]), 0); + + /* + * Then we read some strings from the client + * and print them out. + */ + for (i = 0; i < NSTRS; i++) { + while ((c = fgetc(fp)) != EOF) { + putchar(c); + + if (c == '\n') + break; + } + } + + /* + * We can simply use close() to terminate the + * connection, since we're done with both sides. + */ + close(s); + + exit(0); +} + -- cgit v1.2.3-54-g00ecf on value='2'>2space:mode:
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