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From: Bill Cunningham on 26 Apr 2010 17:17

---

I usually fix my errors but this one I can't trace. This is an attempt
(my first) at sending a string to the echo port and I want it to send it
back to me. I don't know if yahoo has an echo port open but I might be able
to find one somewhere. After a connect() I should use a recv() shouldn't I?
I'm just sending but the code won't compile for some reason it doesn't like
strlen().

#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netdb.h>

struct addrinfo ad, *adp;
int main()
{
int sock, c, a, conn, se;
const char *msg("hello world\n");
memset(&ad, '\0', sizeof(int));
ad.ai_socktype = SOCK_STREAM;
ad.ai_family = AF_INET;
a = getaddrinfo("www.yahoo.com", "7", &ad, &adp);
if (a != 0) {
fprintf(stderr, "Error \%s\n", gai_strerror(a));
exit(1);
}
c = socket(sock, adp->ai_family, adp->ai_socktype);
if (c == -1) {
perror("socket error");
exit(1);
}
conn = connect(sock, adp->ai_addr, adp->ai_addrlen);
if (conn == -1) {
perror("connect error");
exit(1);
}
se = send(sock, msg, strlen(msg), 0);
if (se <= 0) {
perror("send error");
exit(1);
}
return 0;
}

c.c: In function `main':
c.c:12: error: syntax error before string constant
c.c:31: warning: passing arg 1 of `strlen' from incompatible pointer type

Opinions or help?

Bill

From: Bill Cunningham on 26 Apr 2010 17:22

---

Bill Cunningham wrote:

HUMmm. Should this code look like this maybe? Notice I passed a point this
time. Though send() wants a size_t.

> se = send(sock, &msg, strlen(msg), 0);
> if (se <= 0) {
> perror("send error");
> exit(1);
> }
> return 0;
> }
>
> c.c: In function `main':
> c.c:12: error: syntax error before string constant
> c.c:31: warning: passing arg 1 of `strlen' from incompatible pointer
> type
> Opinions or help?
>
> Bill

From: Ian Collins on 26 Apr 2010 17:26

---

On 04/27/10 09:17 AM, Bill Cunningham wrote:
> I usually fix my errors but this one I can't trace.

A joke, I assume?

> const char *msg("hello world\n");

What does that say?

--
Ian Collins

From: John Gordon on 26 Apr 2010 17:30

---

In <4bd602ef$0$12421$bbae4d71(a)news.suddenlink.net> "Bill Cunningham" <nospam(a)nspam.invalid> writes:

> const char *msg("hello world\n");

That's not how to declare a string constant. Try this instead:

const char *msg = "hello world\n";

--
John Gordon A is for Amy, who fell down the stairs
gordon(a)panix.com B is for Basil, assaulted by bears
-- Edward Gorey, "The Gashlycrumb Tinies"

From: Bill Cunningham on 26 Apr 2010 17:36

---

Ian Collins wrote:
> On 04/27/10 09:17 AM, Bill Cunningham wrote:
>> I usually fix my errors but this one I can't trace.
>
> A joke, I assume?

No I've been working alot with perror() and puts() lately. I didn't
think about the parenthesis. <blush> This is what I hate about asking for
help. It always turns out to be something embarrassing.

Bill

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