Skip to content
GitLab
Explore
Sign in
Register
Primary navigation
Search or go to…
Project
C
comp2023-2018-project-1
Manage
Activity
Members
Labels
Plan
Issues
Issue boards
Milestones
Wiki
Code
Merge requests
Repository
Branches
Commits
Tags
Repository graph
Compare revisions
Snippets
Build
Pipelines
Jobs
Pipeline schedules
Artifacts
Deploy
Releases
Model registry
Operate
Environments
Monitor
Incidents
Analyze
Value stream analytics
Contributor analytics
CI/CD analytics
Repository analytics
Model experiments
Help
Help
Support
GitLab documentation
Compare GitLab plans
GitLab community forum
Contribute to GitLab
Provide feedback
Keyboard shortcuts
?
Snippets
Groups
Projects
Show more breadcrumbs
Saleh Ahmed Khan
comp2023-2018-project-1
Commits
53a222bf
Commit
53a222bf
authored
Apr 14, 2018
by
Saleh Ahmed Khan
Browse files
Options
Downloads
Patches
Plain Diff
Workig test client/server (debugged previous using sample code)
parent
55dee9f4
Branches
Branches containing commit
No related tags found
No related merge requests found
Changes
2
Show whitespace changes
Inline
Side-by-side
Showing
2 changed files
client.c
+91
-25
91 additions, 25 deletions
client.c
server.c
+102
-32
102 additions, 32 deletions
server.c
with
193 additions
and
57 deletions
client.c
+
91
−
25
View file @
53a222bf
#include
<arpa/inet.h>
#include
<sys/socket.h>
#include
<netinet/in.h>
/*
* Client program based on sample code
*/
#include
<stdio.h>
#include
<string.h>
#include
<stdlib.h>
#include
<unistd.h>
#include
<string.h>
#include
<sys/types.h>
#include
<sys/socket.h>
#include
<netinet/in.h>
#include
<netdb.h>
#include
<unistd.h>
void
main
(
int
argc
,
char
*
argv
[])
{
int
sockfd
=
0
/*listenfd*/
,
connfd
=
0
,
n
=
0
;
char
recvBuff
[
1025
];
int
main
(
int
argc
,
char
*
argv
[])
{
int
sockfd
,
portno
,
n
;
struct
sockaddr_in
serv_addr
;
struct
hostent
*
server
;
sockfd
=
socket
(
AF_INET
,
SOCK_STREAM
,
0
);
//create socket
char
buffer
[
256
];
if
(
argc
<
3
)
{
fprintf
(
stderr
,
"usage %s hostname port
\n
"
,
argv
[
0
]);
exit
(
0
);
}
portno
=
atoi
(
argv
[
2
]);
/* Translate host name into peer's IP address ;
* This is name translation service by the operating system
*/
server
=
gethostbyname
(
argv
[
1
]);
memset
(
&
serv_addr
,
'0'
,
sizeof
(
serv_addr
));
//initialise server address
memset
(
recvBuff
,
'0'
,
sizeof
(
recvBuff
));
//initialise RECEIVE buffer
bcopy
((
char
*
)
server
->
h_addr
,(
char
*
)
&
serv_addr
.
sin_addr
.
s_addr
,
server
->
h_length
);
serv_addr
.
sin_family
=
AF_INET
;
//Type of address – internet IP
serv_addr
.
sin_port
=
htons
(
atoi
(
argv
[
2
]));
// port no
if
(
server
==
NULL
)
{
fprintf
(
stderr
,
"ERROR, no such host
\n
"
);
exit
(
0
);
}
/* Building data structures for socket */
bzero
((
char
*
)
&
serv_addr
,
sizeof
(
serv_addr
));
if
(
connect
(
sockfd
,
(
struct
sockaddr
*
)
&
serv_addr
,
sizeof
(
serv_addr
))
<
0
)
{
printf
(
"Error connecting to server
\n
"
);
}
else
{
printf
(
"%s server
\n
"
,
(
char
*
)
&
serv_addr
);
serv_addr
.
sin_family
=
AF_INET
;
bcopy
((
char
*
)
server
->
h_addr
,
(
char
*
)
&
serv_addr
.
sin_addr
.
s_addr
,
server
->
h_length
);
serv_addr
.
sin_port
=
htons
(
portno
);
/* Create TCP socket -- active open
* Preliminary steps: Setup: creation of active open socket
*/
sockfd
=
socket
(
AF_INET
,
SOCK_STREAM
,
0
);
if
(
sockfd
<
0
)
{
perror
(
"ERROR opening socket"
);
exit
(
0
);
}
if
(
connect
(
sockfd
,(
struct
sockaddr
*
)
&
serv_addr
,
sizeof
(
serv_addr
))
<
0
)
{
perror
(
"ERROR connecting"
);
exit
(
0
);
}
/* Do processing
*/
printf
(
"Please enter the message: "
);
bzero
(
buffer
,
256
);
while
((
n
=
read
(
connfd
,
recvBuff
,
sizeof
(
recvBuff
)
-
1
))
>
0
)
{
printf
(
"%s
\n\n
"
,
recvBuff
);
fgets
(
buffer
,
255
,
stdin
);
n
=
write
(
sockfd
,
buffer
,
strlen
(
buffer
));
if
(
n
<
0
)
{
perror
(
"ERROR writing to socket"
);
exit
(
0
);
}
bzero
(
buffer
,
256
);
n
=
read
(
sockfd
,
buffer
,
255
);
if
(
n
<
0
)
{
perror
(
"ERROR reading from socket"
);
exit
(
0
);
}
printf
(
"%s
\n
"
,
buffer
);
return
0
;
}
This diff is collapsed.
Click to expand it.
server.c
+
102
−
32
View file @
53a222bf
#include
<arpa/inet.h>
#include
<sys/socket.h>
#include
<netinet/in.h>
/*
* Server program based on sample code
*/
#include
<stdio.h>
#include
<string.h>
#include
<stdlib.h>
#include
<string.h>
#include
<sys/types.h>
#include
<sys/socket.h>
#include
<netinet/in.h>
#include
<unistd.h>
void
main
(
int
argc
,
char
*
argv
[])
{
int
listenfd
=
0
,
connfd
=
0
;
char
sendBuff
[
1025
];
struct
sockaddr_in
serv_addr
;
int
main
(
int
argc
,
char
*
argv
[])
{
int
sockfd
,
newsockfd
,
portno
;
char
buffer
[
256
];
struct
sockaddr_in
serv_addr
,
cli_addr
;
socklen_t
clilen
;
int
n
;
listenfd
=
socket
(
AF_INET
,
SOCK_STREAM
,
0
);
//create socket
if
(
listenfd
<
0
)
{
printf
(
"Error creating socket
\n
"
);
if
(
argc
<
2
)
{
fprintf
(
stderr
,
"ERROR, no port provided
\n
"
);
exit
(
1
);
}
memset
(
&
serv_addr
,
'0'
,
sizeof
(
serv_addr
));
//initialise server address
memset
(
sendBuff
,
'0'
,
sizeof
(
sendBuff
));
//initialise send buffer
serv_addr
.
sin_family
=
AF_INET
;
//Type of address – internet IP
serv_addr
.
sin_addr
.
s_addr
=
htonl
(
INADDR_ANY
);
//Listen on ANY IP Addr
// serv_addr.sin_port = htons(5000); //Listen on port 5000
serv_addr
.
sin_port
=
htons
(
atoi
(
argv
[
1
]));
if
(
bind
(
listenfd
,
(
struct
sockaddr
*
)
&
serv_addr
,
sizeof
(
serv_addr
))
<
0
)
{
printf
(
"Error binding
\n
"
);
/* Create TCP socket */
sockfd
=
socket
(
AF_INET
,
SOCK_STREAM
,
0
);
if
(
sockfd
<
0
)
{
perror
(
"ERROR opening socket"
);
exit
(
1
);
}
listen
(
listenfd
,
10
);
// maximum number of client connections to queue
connfd
=
accept
(
listenfd
,
(
struct
sockaddr
*
)
NULL
,
NULL
);
if
(
connfd
<
0
)
{
printf
(
"Error accepting
\n
"
);
bzero
((
char
*
)
&
serv_addr
,
sizeof
(
serv_addr
));
portno
=
atoi
(
argv
[
1
]);
/* Create address we're going to listen on (given port number)
- converted to network byte order & any IP address for
this machine */
serv_addr
.
sin_family
=
AF_INET
;
serv_addr
.
sin_addr
.
s_addr
=
INADDR_ANY
;
serv_addr
.
sin_port
=
htons
(
portno
);
// store in machine-neutral format
/* Bind address to the socket */
if
(
bind
(
sockfd
,
(
struct
sockaddr
*
)
&
serv_addr
,
sizeof
(
serv_addr
))
<
0
)
{
perror
(
"ERROR on binding"
);
exit
(
1
);
}
snprintf
(
sendBuff
,
sizeof
(
sendBuff
),
"Hello World!"
);
write
(
connfd
,
sendBuff
,
strlen
(
sendBuff
));
close
(
connfd
);
/* Listen on socket - means we're ready to accept connections -
incoming connection requests will be queued */
listen
(
sockfd
,
5
);
clilen
=
sizeof
(
cli_addr
);
/* Accept a connection - block until a connection is ready to
be accepted. Get back a new file descriptor to communicate on. */
newsockfd
=
accept
(
sockfd
,
(
struct
sockaddr
*
)
&
cli_addr
,
&
clilen
);
if
(
newsockfd
<
0
)
{
perror
(
"ERROR on accept"
);
exit
(
1
);
}
bzero
(
buffer
,
256
);
/* Read characters from the connection,
then process */
n
=
read
(
newsockfd
,
buffer
,
255
);
if
(
n
<
0
)
{
perror
(
"ERROR reading from socket"
);
exit
(
1
);
}
printf
(
"Here is the message: %s
\n
"
,
buffer
);
n
=
write
(
newsockfd
,
"I got your message"
,
18
);
if
(
n
<
0
)
{
perror
(
"ERROR writing to socket"
);
exit
(
1
);
}
/* close socket */
close
(
sockfd
);
return
0
;
}
This diff is collapsed.
Click to expand it.
Preview
0%
Loading
Try again
or
attach a new file
.
Cancel
You are about to add
0
people
to the discussion. Proceed with caution.
Finish editing this message first!
Save comment
Cancel
Please
register
or
sign in
to comment