little network/socket-program with parse error

[selekta]

hi,

i've recently started to deal a little bit with tcp/ip-socket-programming
(linux).
Now i've written a little test-program (as displayed further down).
When i'm trying to compile it the gcc-compiler return "parse error in
l.23/.24 before token '='. "
the line before those two ( host_addr.sin_f amily = AF_INET;) is acepted
without any problems.
I'd be happy if anybody could tell me where's my fault.

Thanks a lot.

I'm sorry for mistakes in my english.

#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>

#define host_IP = "127.0.0.1" ; //IP only for test purpose
#define host_PORT = 1024; //port number only for test purpose

int main(void)
{
int sock;
struct sockaddr_in host_addr;

sock = socket(AF_INET, SOCK_STREAM, 0);
if (sock == -1)
printf("couldn' t establish socket.\n");
else
printf("socket created.\n");

host_addr.sin_f amily = AF_INET;
// l. 23// host_addr.sin_p ort = htons(host_PORT );
//l. 24// host_addr.sin_a ddr.s_addr = inet_addr(host_ IP);

if (connect(sock, (struct sockaddr *)&host_addr,si zeof(&host_addr )) != -1)
printf("connect ed to server.\n");
else
printf("couldn' t connect.\n");

close(sock);
printf("socket closed.\n");
}

[Case]

Re: little network/socket-program with parse error

selekta wrote:[color=blue]
> hi,
>
> i've recently started to deal a little bit with tcp/ip-socket-programming
> (linux).
> Now i've written a little test-program (as displayed further down).
> When i'm trying to compile it the gcc-compiler return "parse error in
> l.23/.24 before token '='. "
> the line before those two ( host_addr.sin_f amily = AF_INET;) is acepted
> without any problems.
> I'd be happy if anybody could tell me where's my fault.
>
> Thanks a lot.
>
> I'm sorry for mistakes in my english.
>
> #include <stdio.h>
> #include <sys/types.h>
> #include <sys/socket.h>
> #include <netinet/in.h>
> #include <arpa/inet.h>
> #include <unistd.h>
>
> #define host_IP = "127.0.0.1" ; //IP only for test purpose
> #define host_PORT = 1024; //port number only for test purpose[/color]

The preprocessor directive #define should be seen as nothing
more than a text-processor 'find-replace' operation. So what
happens below where you get compiler errors is that

'host_PORT'

is literally replaced with

'= 1024;'

Looking at your code below, clearly this is an error. So:

#define host_PORT 1024

BTW, it is a kind of non-written rule to write #define'd names
in capitals: 'HOST_PORT'.

Same for 'host_IP'.

Many compiler have a switch to spit out the code after preprocessing.
In a few well known compilers this is the -E switch. Can be handy
in cases like this.
[color=blue]
>
> int main(void)
> {
> int sock;
> struct sockaddr_in host_addr;
>
> sock = socket(AF_INET, SOCK_STREAM, 0);
> if (sock == -1)
> printf("couldn' t establish socket.\n");
> else
> printf("socket created.\n");
>
> host_addr.sin_f amily = AF_INET;
> // l. 23// host_addr.sin_p ort = htons(host_PORT );
> //l. 24// host_addr.sin_a ddr.s_addr = inet_addr(host_ IP);
>
> if (connect(sock, (struct sockaddr *)&host_addr,si zeof(&host_addr )) != -1)
> printf("connect ed to server.\n");
> else
> printf("couldn' t connect.\n");
>
> close(sock);
> printf("socket closed.\n");
> }
>
>[/color]

[Devrobcom]

Re: little network/socket-program with parse error

Your defines shall not have any =
#define host_IP "127.0.0.1" ; //IP only for test purpose
#define host_PORT 1024; //port number only for test purpose

"selekta" <n.rebel@gmx.ne t> wrote in message
news:c9hqi4$1tk $06$1@news.t-online.com...[color=blue]
> hi,
>
> i've recently started to deal a little bit with tcp/ip-socket-programming
> (linux).
> Now i've written a little test-program (as displayed further down).
> When i'm trying to compile it the gcc-compiler return "parse error in
> l.23/.24 before token '='. "
> the line before those two ( host_addr.sin_f amily = AF_INET;) is acepted
> without any problems.
> I'd be happy if anybody could tell me where's my fault.
>
> Thanks a lot.
>
> I'm sorry for mistakes in my english.
>
> #include <stdio.h>
> #include <sys/types.h>
> #include <sys/socket.h>
> #include <netinet/in.h>
> #include <arpa/inet.h>
> #include <unistd.h>
>
> #define host_IP = "127.0.0.1" ; //IP only for test purpose
> #define host_PORT = 1024; //port number only for test purpose
>
> int main(void)
> {
> int sock;
> struct sockaddr_in host_addr;
>
> sock = socket(AF_INET, SOCK_STREAM, 0);
> if (sock == -1)
> printf("couldn' t establish socket.\n");
> else
> printf("socket created.\n");
>
> host_addr.sin_f amily = AF_INET;
> // l. 23// host_addr.sin_p ort = htons(host_PORT );
> //l. 24// host_addr.sin_a ddr.s_addr = inet_addr(host_ IP);
>
> if (connect(sock, (struct sockaddr *)&host_addr,si zeof(&host_addr ))[/color]
!= -1)[color=blue]
> printf("connect ed to server.\n");
> else
> printf("couldn' t connect.\n");
>
> close(sock);
> printf("socket closed.\n");
> }
>
>[/color]

[Harti Brandt]

Re: little network/socket-program with parse error

On Tue, 1 Jun 2004, Devrobcom wrote:

D>Your defines shall not have any =
D>#define host_IP "127.0.0.1" ; //IP only for test purpose
D>#define host_PORT 1024; //port number only for test purpose

They also should not have a ';'.

harti

D>
D>"selekta" <n.rebel@gmx.ne t> wrote in message
D>news:c9hqi4$1 tk$06$1@news.t-online.com...
D>> hi,
D>>
D>> i've recently started to deal a little bit with tcp/ip-socket-programming
D>> (linux).
D>> Now i've written a little test-program (as displayed further down).
D>> When i'm trying to compile it the gcc-compiler return "parse error in
D>> l.23/.24 before token '='. "
D>> the line before those two ( host_addr.sin_f amily = AF_INET;) is acepted
D>> without any problems.
D>> I'd be happy if anybody could tell me where's my fault.
D>>
D>> Thanks a lot.
D>>
D>> I'm sorry for mistakes in my english.
D>>
D>> #include <stdio.h>
D>> #include <sys/types.h>
D>> #include <sys/socket.h>
D>> #include <netinet/in.h>
D>> #include <arpa/inet.h>
D>> #include <unistd.h>
D>>
D>> #define host_IP = "127.0.0.1" ; //IP only for test purpose
D>> #define host_PORT = 1024; //port number only for test purpose
D>>
D>> int main(void)
D>> {
D>> int sock;
D>> struct sockaddr_in host_addr;
D>>
D>> sock = socket(AF_INET, SOCK_STREAM, 0);
D>> if (sock == -1)
D>> printf("couldn' t establish socket.\n");
D>> else
D>> printf("socket created.\n");
D>>
D>> host_addr.sin_f amily = AF_INET;
D>> // l. 23// host_addr.sin_p ort = htons(host_PORT );
D>> //l. 24// host_addr.sin_a ddr.s_addr = inet_addr(host_ IP);
D>>
D>> if (connect(sock, (struct sockaddr *)&host_addr,si zeof(&host_addr ))
D>!= -1)
D>> printf("connect ed to server.\n");
D>> else
D>> printf("couldn' t connect.\n");
D>>
D>> close(sock);
D>> printf("socket closed.\n");
D>> }
D>>
D>>
D>
D>
D>

[CBFalconer]

Re: little network/socket-program with parse error

selekta wrote:[color=blue]
>[/color]
.... snip ...[color=blue]
>
> #include <stdio.h>
> #include <sys/types.h>
> #include <sys/socket.h>
> #include <netinet/in.h>
> #include <arpa/inet.h>
> #include <unistd.h>[/color]

None of the above, apart from stdio.h, are defined in standard C.
Thus it is impossible to deal with your problems in this
newsgroup. You need a system specific group.
[color=blue]
>
> #define host_IP = "127.0.0.1" ; //IP only for test purpose
> #define host_PORT = 1024; //port number only for test purpose[/color]

Do not use // comments in newsgroups, they do not survive line
wrapping particularly well.
[color=blue]
>
> int main(void)
> {
> int sock;
> struct sockaddr_in host_addr;[/color]

because things like this are undefined here.

--
A: Because it fouls the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing on usenet and in e-mail?

[Joona I Palaste]

Re: little network/socket-program with parse error

CBFalconer <cbfalconer@yah oo.com> scribbled the following:[color=blue]
> selekta wrote:[color=green]
>>[/color]
> ... snip ...[color=green]
>>
>> #include <stdio.h>
>> #include <sys/types.h>
>> #include <sys/socket.h>
>> #include <netinet/in.h>
>> #include <arpa/inet.h>
>> #include <unistd.h>[/color][/color]
[color=blue]
> None of the above, apart from stdio.h, are defined in standard C.
> Thus it is impossible to deal with your problems in this
> newsgroup. You need a system specific group.[/color]
[color=blue][color=green]
>>
>> #define host_IP = "127.0.0.1" ; //IP only for test purpose
>> #define host_PORT = 1024; //port number only for test purpose[/color][/color]
[color=blue]
> Do not use // comments in newsgroups, they do not survive line
> wrapping particularly well.[/color]

Way to miss the real problem completely, CBFalconer.
[color=blue][color=green]
>> int main(void)
>> {
>> int sock;
>> struct sockaddr_in host_addr;[/color][/color]
[color=blue]
> because things like this are undefined here.[/color]

--
/-- Joona Palaste (palaste@cc.hel sinki.fi) ------------- Finland --------\
\-- http://www.helsinki.fi/~palaste --------------------- rules! --------/
"How can we possibly use sex to get what we want? Sex IS what we want."
- Dr. Frasier Crane

[Richard Tobin]

Re: little network/socket-program with parse error

In article <40BC8D5F.F426A 4BD@yahoo.com>,
CBFalconer <cbfalconer@wor ldnet.att.net> wrote:
[color=blue]
>Thus it is impossible to deal with your problems in this
>newsgroup.[/color]

And yet, remarkably, several people did.

-- Richard

[CBFalconer]

Re: little network/socket-program with parse error

Richard Tobin wrote:[color=blue]
> CBFalconer <cbfalconer@wor ldnet.att.net> wrote:
>[color=green]
>> Thus it is impossible to deal with your problems in this
>> newsgroup.[/color]
>
> And yet, remarkably, several people did.[/color]

More power to them. You concealed it behind a mass of uncheckable
code very well.

--
fix (vb.): 1. to paper over, obscure, hide from public view; 2.
to work around, in a way that produces unintended consequences
that are worse than the original problem. Usage: "Windows ME
fixes many of the shortcomings of Windows 98 SE". - Hutchison