#define NULL ((void *)0)
typedef unsigned long size_t; // Customize by platform.
typedef long intptr_t;
typedef unsigned long uintptr_t;
typedef long scalar_t__; // Either arithmetic or pointer type.
/* By default, we understand bool (as a convenience). */
typedef int bool;
#define false 0
#define true 1

/* Forward declarations */
typedef struct TYPE_2__ TYPE_1__;

/* Type definitions */
struct TYPE_2__ {
  int /*<<< orphan*/ s_addr;
};
struct sockaddr_in {
  int /*<<< orphan*/ sin_port;
  TYPE_1__ sin_addr;
  int /*<<< orphan*/ sin_family;
};
struct sockaddr {
  int dummy;
};
typedef int socklen_t;
typedef int /*<<< orphan*/ servaddr;

/* Variables and functions */
int /*<<< orphan*/ AF_INET;
int /*<<< orphan*/ SOCK_STREAM;
int /*<<< orphan*/ bzero(struct sockaddr_in *, int);
int /*<<< orphan*/ connect(int, struct sockaddr *, int);
int /*<<< orphan*/ htons(int);
int /*<<< orphan*/ inet_addr(char *);
int /*<<< orphan*/ printf(char *, ...);
int recvfrom(int, char *, int, int /*<<< orphan*/, int /*<<< orphan*/ *,
             int /*<<< orphan*/ *);
int /*<<< orphan*/ scanf(char *, char *);
int /*<<< orphan*/ sendto(int, char *, int, int /*<<< orphan*/,
                          struct sockaddr *, int);
int socket(int /*<<< orphan*/, int /*<<< orphan*/, int /*<<< orphan*/);
int /*<<< orphan*/ strcpy(char *, char *);
int main(int argc, char *argv[]) {
  int sockfd;
  int n;
  socklen_t len;
  char sendline[1024], recvline[1024];
  struct sockaddr_in servaddr;
  strcpy(sendline, "");
  printf("\n Enter the message : ");
  scanf("%s", sendline);
  sockfd = socket(AF_INET, SOCK_STREAM, 0);
  bzero(&servaddr, sizeof(servaddr));
  servaddr.sin_family = AF_INET;
  servaddr.sin_addr.s_addr = inet_addr("127.0.0.1");
  servaddr.sin_port = htons(8888);
  connect(sockfd, (struct sockaddr *)&servaddr, sizeof(servaddr));
  len = sizeof(servaddr);
  sendto(sockfd, sendline, 1024, 0, (struct sockaddr *)&servaddr, len);
  n = recvfrom(sockfd, recvline, 1024, 0, NULL, NULL);
  recvline[n] = 0;
  printf("\n Server's Echo : %s\n\n", recvline);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x830,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
lea    -0x420(%rbp),%rdi
lea    0xe73(%rip),%rsi
call   1030 <strcpy@plt>
lea    0xe2d(%rip),%rdi
mov    $0x0,%al
call   1050 <printf@plt>
lea    -0x420(%rbp),%rsi
lea    0xe2f(%rip),%rdi
call   1090 <scanf@plt>
mov    0x2df4(%rip),%rax
mov    (%rax),%edi
mov    0x2ddb(%rip),%rax
mov    (%rax),%esi
xor    %edx,%edx
call   10c0 <socket@plt>
mov    %eax,-0x14(%rbp)
lea    -0x830(%rbp),%rdi
mov    $0xc,%esi
call   10a0 <bzero@plt>
mov    0x2dc7(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x828(%rbp)
lea    0xdea(%rip),%rdi
call   1070 <inet_addr@plt>
mov    %eax,-0x82c(%rbp)
mov    $0x22b8,%edi
call   1040 <htons@plt>
mov    %eax,-0x830(%rbp)
mov    -0x14(%rbp),%edi
lea    -0x830(%rbp),%rsi
mov    $0xc,%edx
call   10b0 <connect@plt>
movl   $0xc,-0x1c(%rbp)
mov    -0x14(%rbp),%edi
lea    -0x420(%rbp),%rsi
lea    -0x830(%rbp),%r8
mov    -0x1c(%rbp),%r9d
mov    $0x400,%edx
xor    %ecx,%ecx
call   1060 <sendto@plt>
mov    -0x14(%rbp),%edi
lea    -0x820(%rbp),%rsi
mov    $0x400,%edx
xor    %ecx,%ecx
xor    %eax,%eax
mov    %eax,%r9d
mov    %r9,%r8
call   1080 <recvfrom@plt>
mov    %eax,-0x18(%rbp)
movslq -0x18(%rbp),%rax
movb   $0x0,-0x820(%rbp,%rax,1)
lea    -0x820(%rbp),%rsi
lea    0xd62(%rip),%rdi
mov    $0x0,%al
call   1050 <printf@plt>
xor    %eax,%eax
add    $0x830,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r15
push   %r14
push   %rbx
sub    $0x818,%rsp
lea    0xe86(%rip),%rsi
lea    0x410(%rsp),%r14
mov    %r14,%rdi
call   1030 <strcpy@plt>
lea    0xe35(%rip),%rdi
xor    %eax,%eax
call   1050 <printf@plt>
lea    0xe3e(%rip),%rdi
mov    %r14,%rsi
call   1090 <scanf@plt>
mov    0x2e00(%rip),%rbx
mov    (%rbx),%edi
mov    0x2de7(%rip),%rax
mov    (%rax),%esi
xor    %edx,%edx
call   10c0 <socket@plt>
mov    %eax,%ebp
mov    %rsp,%r15
mov    %r15,%rdi
mov    $0xc,%esi
call   10a0 <bzero@plt>
mov    (%rbx),%eax
mov    %eax,0x8(%rsp)
lea    0xe01(%rip),%rdi
call   1070 <inet_addr@plt>
mov    %eax,0x4(%rsp)
mov    $0x22b8,%edi
call   1040 <htons@plt>
mov    %eax,(%rsp)
mov    %ebp,%edi
mov    %r15,%rsi
mov    $0xc,%edx
call   10b0 <connect@plt>
mov    %ebp,%edi
mov    %r14,%rsi
mov    $0x400,%edx
xor    %ecx,%ecx
mov    %r15,%r8
mov    $0xc,%r9d
call   1060 <sendto@plt>
lea    0x10(%rsp),%rbx
mov    %ebp,%edi
mov    %rbx,%rsi
mov    $0x400,%edx
xor    %ecx,%ecx
xor    %r8d,%r8d
xor    %r9d,%r9d
call   1080 <recvfrom@plt>
cltq
movb   $0x0,0x10(%rsp,%rax,1)
lea    0xda2(%rip),%rdi
mov    %rbx,%rsi
xor    %eax,%eax
call   1050 <printf@plt>
xor    %eax,%eax
add    $0x818,%rsp
pop    %rbx
pop    %r14
pop    %r15
pop    %rbp
ret

LLVM IR (-O0):
%struct.sockaddr_in = type { i32, %struct.TYPE_2__, i32 }
%struct.TYPE_2__ = type { i32 }
%struct.sockaddr = type { i32 }
@.str = [1 x i8] zeroinitializer
@.str.1 = [23 x i8] c"\0A Enter the message : \00"
@.str.2 = [3 x i8] c"%s\00"
@AF_INET = global i32 0
@SOCK_STREAM = global i32 0
@.str.3 = [10 x i8] c"127.0.0.1\00"
@.str.4 = [23 x i8] c"\0A Server's Echo : %s\0A\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
%7 = alloca i32
%8 = alloca i32
%9 = alloca [1024 x i8]
%10 = alloca [1024 x i8]
%11 = alloca %struct.sockaddr_in
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%12 = getelementptr inbounds [1024 x i8], [1024 x i8]* %9, i64 0, i64 0
%13 = call i32 @strcpy(i8* %12, i8* getelementptr inbounds ([1 x i8], [1 x i8]* @.str, i64 0, i64 0))
%14 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.1, i64 0, i64 0))
%15 = getelementptr inbounds [1024 x i8], [1024 x i8]* %9, i64 0, i64 0
%16 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i8* %15)
%17 = load i32, i32* @AF_INET
%18 = load i32, i32* @SOCK_STREAM
%19 = call i32 @socket(i32 %17, i32 %18, i32 0)
store i32 %19, i32* %6
%20 = call i32 @bzero(%struct.sockaddr_in* %11, i32 12)
%21 = load i32, i32* @AF_INET
%22 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %11, i32 0, i32 2
store i32 %21, i32* %22
%23 = call i32 @inet_addr(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.3, i64 0, i64 0))
%24 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %11, i32 0, i32 1
%25 = getelementptr inbounds %struct.TYPE_2__, %struct.TYPE_2__* %24, i32 0, i32 0
store i32 %23, i32* %25
%26 = call i32 @htons(i32 8888)
%27 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %11, i32 0, i32 0
store i32 %26, i32* %27
%28 = load i32, i32* %6
%29 = bitcast %struct.sockaddr_in* %11 to %struct.sockaddr*
%30 = call i32 @connect(i32 %28, %struct.sockaddr* %29, i32 12)
store i32 12, i32* %8
%31 = load i32, i32* %6
%32 = getelementptr inbounds [1024 x i8], [1024 x i8]* %9, i64 0, i64 0
%33 = bitcast %struct.sockaddr_in* %11 to %struct.sockaddr*
%34 = load i32, i32* %8
%35 = call i32 @sendto(i32 %31, i8* %32, i32 1024, i32 0, %struct.sockaddr* %33, i32 %34)
%36 = load i32, i32* %6
%37 = getelementptr inbounds [1024 x i8], [1024 x i8]* %10, i64 0, i64 0
%38 = call i32 @recvfrom(i32 %36, i8* %37, i32 1024, i32 0, i32* null, i32* null)
store i32 %38, i32* %7
%39 = load i32, i32* %7
%40 = sext i32 %39 to i64
%41 = getelementptr inbounds [1024 x i8], [1024 x i8]* %10, i64 0, i64 %40
store i8 0, i8* %41
%42 = getelementptr inbounds [1024 x i8], [1024 x i8]* %10, i64 0, i64 0
%43 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.4, i64 0, i64 0), i8* %42)
ret i32 0
}

LLVM IR (-O2):
%struct.sockaddr_in = type { i32, %struct.TYPE_2__, i32 }
%struct.TYPE_2__ = type { i32 }
%struct.sockaddr = type { i32 }
@.str = [1 x i8] zeroinitializer
@.str.1 = [23 x i8] c"\0A Enter the message : \00"
@.str.2 = [3 x i8] c"%s\00"
@AF_INET = global i32 0
@SOCK_STREAM = global i32 0
@.str.3 = [10 x i8] c"127.0.0.1\00"
@.str.4 = [23 x i8] c"\0A Server's Echo : %s\0A\0A\00"
define i32 @main(i32 %0, i8** nocapture readnone %1) {
%3 = alloca [1024 x i8]
%4 = alloca [1024 x i8]
%5 = alloca %struct.sockaddr_in
%6 = getelementptr inbounds [1024 x i8], [1024 x i8]* %3, i64 0, i64 0
%7 = getelementptr inbounds [1024 x i8], [1024 x i8]* %4, i64 0, i64 0
%8 = bitcast %struct.sockaddr_in* %5 to i8*
%9 = call i32 @strcpy(i8* %6, i8* getelementptr inbounds ([1 x i8], [1 x i8]* @.str, i64 0, i64 0))
%10 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([23 x i8], [23 x i8]* @.str.1, i64 0, i64 0))
%11 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i8* %6)
%12 = load i32, i32* @AF_INET
%13 = load i32, i32* @SOCK_STREAM
%14 = call i32 @socket(i32 %12, i32 %13, i32 0)
%15 = call i32 @bzero(%struct.sockaddr_in* %5, i32 12)
%16 = load i32, i32* @AF_INET
%17 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %5, i64 0, i32 2
store i32 %16, i32* %17
%18 = call i32 @inet_addr(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.3, i64 0, i64 0))
%19 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %5, i64 0, i32 1, i32 0
store i32 %18, i32* %19
%20 = call i32 @htons(i32 8888)
%21 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %5, i64 0, i32 0
store i32 %20, i32* %21
%22 = bitcast %struct.sockaddr_in* %5 to %struct.sockaddr*
%23 = call i32 @connect(i32 %14, %struct.sockaddr* %22, i32 12)
%24 = call i32 @sendto(i32 %14, i8* %6, i32 1024, i32 0, %struct.sockaddr* %22, i32 12)
%25 = call i32 @recvfrom(i32 %14, i8* %7, i32 1024, i32 0, i32* null, i32* null)
%26 = sext i32 %25 to i64
%27 = getelementptr inbounds [1024 x i8], [1024 x i8]* %4, i64 0, i64 %26
store i8 0, i8* %27
%28 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([23 x i8], [23 x i8]* @.str.4, i64 0, i64 0), i8* %7)
ret i32 0
}