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Implement client-side transaction TCP. This has little effect

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if the server doesn't support it.  (This is intended mostly as
an example.)
This commit is contained in:
Garrett Wollman 1995-12-17 21:04:36 +00:00
parent dd07a8677b
commit 1e474c62ca
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=12909
1 changed files with 39 additions and 13 deletions
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46
usr.bin/finger/net.c
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@ -50,6 +50,7 @@ static char sccsid[] = "@(#)net.c 8.3 (Berkeley) 1/2/94";
#include <stdio.h> #include <stdio.h>
#include <ctype.h> #include <ctype.h>
#include <string.h> #include <string.h>
#include <sys/uio.h>
#include "finger.h" #include "finger.h"
void void
@ -65,6 +66,8 @@ netfinger(name)
struct sockaddr_in sin; struct sockaddr_in sin;
int s; int s;
char *alist[1], *host; char *alist[1], *host;
struct iovec iov[3];
struct msghdr msg;
if (!(host = rindex(name, '@'))) if (!(host = rindex(name, '@')))
return; return;
@ -96,18 +99,31 @@ netfinger(name)
/* have network connection; identify the host connected with */ /* have network connection; identify the host connected with */
(void)printf("[%s]\n", hp->h_name); (void)printf("[%s]\n", hp->h_name);
if (connect(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
perror("finger: connect"); msg.msg_name = (void *)&sin;
(void)close(s); msg.msg_namelen = sizeof sin;
return; msg.msg_iov = iov;
} msg.msg_iovlen = 0;
msg.msg_control = 0;
msg.msg_controllen = 0;
msg.msg_flags = MSG_EOF;
/* -l flag for remote fingerd */ /* -l flag for remote fingerd */
if (lflag) if (lflag) {
write(s, "/W ", 3); iov[msg.msg_iovlen].iov_base = "/W ";
iov[msg.msg_iovlen++].iov_len = 3;
}
/* send the name followed by <CR><LF> */ /* send the name followed by <CR><LF> */
(void)write(s, name, strlen(name)); iov[msg.msg_iovlen].iov_base = name;
(void)write(s, "\r\n", 2); iov[msg.msg_iovlen++].iov_len = strlen(name);
iov[msg.msg_iovlen].iov_base = "\r\n";
iov[msg.msg_iovlen++].iov_len = 2;
if (sendmsg(s, &msg, MSG_EOF) < 0) {
perror("finger: sendmsg");
close(s);
return;
}
/* /*
* Read from the remote system; once we're connected, we assume some * Read from the remote system; once we're connected, we assume some
@ -121,7 +137,9 @@ netfinger(name)
* it isn't a space, we can simply set the 7th bit. Every ASCII * it isn't a space, we can simply set the 7th bit. Every ASCII
* character with bit 7 set is printable. * character with bit 7 set is printable.
*/ */
if (fp = fdopen(s, "r")) if (fp = fdopen(s, "r")) {
int lastc = '\n';
while ((c = getc(fp)) != EOF) { while ((c = getc(fp)) != EOF) {
c &= 0x7f; c &= 0x7f;
if (c == 0x0d) { if (c == 0x0d) {
@ -143,5 +161,13 @@ netfinger(name)
} }
if (lastc != '\n') if (lastc != '\n')
putchar('\n'); putchar('\n');
if (ferror(fp)) {
/*
* Assume that whatever it was set errno...
*/
perror("finger: read");
}
(void)fclose(fp); (void)fclose(fp);
}
} }