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wolfssl-examples
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updated coding standards

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Kaleb Himes 2014-05-22 10:48:09 -06:00
parent 084850ab35
commit 06fd240ba0
1 changed files with 62 additions and 56 deletions
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project1/server-udp.c
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@ -1,70 +1,76 @@
#include <stdio.h> /* standard in/out procedures */ #include <stdio.h> /* standard in/out procedures */
#include <stdlib.h> /* defines system calls */ #include <stdlib.h> /* defines system calls */
#include <string.h> /* necessary for memset */ #include <string.h> /* necessary for memset */
#include <netdb.h> #include <netdb.h>
#include <sys/socket.h> /* used for all socket calls */ #include <sys/socket.h> /* used for all socket calls */
#include <netinet/in.h> /* used for sockaddr_in */ #include <netinet/in.h> /* used for sockaddr_in */
#include <arpa/inet.h> #include <arpa/inet.h>
#define SERV_PORT 11111 /* define our server port number */ #define SERV_PORT 11111 /* define our server port number */
#define MSGLEN 80 /* limit incoming message size */ #define MSGLEN 80 /* limit incoming message size */
int int main (int argc, char** argv)
main(int argc, char** argv)
{ {
/* CREATE THE SOCKET */ /* CREATE THE SOCKET */
struct sockaddr_in servaddr; /* our server's address */ struct sockaddr_in servaddr; /* our server's address */
struct sockaddr_in cliaddr; /* the client's address */ struct sockaddr_in cliaddr; /* the client's address */
int sockfd; /* Initialize our socket */ int sockfd; /* Initialize our socket */
socklen_t addrlen = sizeof(cliaddr);/* length of address' */ socklen_t addrlen = sizeof(cliaddr);/* length of address' */
int recvlen; /* number of bytes recieved */ int recvlen; /* number of bytes recieved */
int msgnum = 0; /* the messages we reveive in order */ int msgnum = 0; /* the messages we reveive in order */
char buf[MSGLEN]; /* the incoming message */ char buf[MSGLEN]; /* the incoming message */
/* create a UDP/IP socket */
if((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
{
perror("cannot create socket");
return 0;
}
/* printf("created socket descriptor = %d\n", sockfd); */
/* INADDR_ANY = IP address and socket = 11111, modify SERV_PORT to change */
memset((char *)&servaddr, 0, sizeof(servaddr));
servaddr.sin_family = AF_INET; /* create a UDP/IP socket */
/* host-to-network-long conversion (htonl) */ if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
servaddr.sin_addr.s_addr = htonl(INADDR_ANY); perror("cannot create socket");
/* host-to-network-short conversion (htons) */ return 0;
servaddr.sin_port = htons(SERV_PORT); }
if (bind(sockfd, (struct sockaddr *)&servaddr, sizeof(servaddr)) < 0) { /* INADDR_ANY = IPaddr, socket = 11111, modify SERV_PORT to change */
perror("bind failed"); memset((char *)&servaddr, 0, sizeof(servaddr));
return 0;
}
/* loop, listen for client, print received, reply to client */
for(;;) {
printf("waiting for client message on port %d\n", SERV_PORT);
recvlen = recvfrom(sockfd, buf, MSGLEN, 0, (struct sockaddr *)&cliaddr, &addrlen);
printf("heard %d bytes\n", recvlen);
if (recvlen > 0) {
buf[recvlen] = 0;
printf("I heard this: \"%s\"\n", buf);
}
else
printf("lost the connection to client\n");
sprintf(buf, "Message #%d received\n", msgnum++);
printf("reply sent \"%s\"\n", buf);
if (sendto(sockfd, buf, strlen(buf), 0, (struct sockaddr *)&cliaddr, addrlen) < 0)
perror("sendto");
/* continues to loop, use "Ctrl+C" to terminate listening */
} /* host-to-network-long conversion (htonl) */
/* host-to-network-short conversion (htons) */
servaddr.sin_family = AF_INET;
servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
servaddr.sin_port = htons(SERV_PORT);
if (bind(sockfd, (struct sockaddr *)&servaddr, sizeof(servaddr)) < 0) {
perror("bind failed");
return 0;
}
/* loop, listen for client, print received, reply to client */
for ( ; ; ) {
printf("waiting for client message on port %d\n", SERV_PORT);
recvlen = recvfrom(sockfd, buf, MSGLEN, 0,
(struct sockaddr *)&cliaddr, &addrlen);
printf("heard %d bytes\n", recvlen);
if (recvlen > 0) {
buf[recvlen] = 0;
printf("I heard this: \"%s\"\n", buf);
}
else
printf("lost the connection to client\n");
sprintf(buf, "Message #%d received\n", msgnum++);
printf("reply sent \"%s\"\n", buf);
if (sendto(sockfd, buf, strlen(buf), 0,
(struct sockaddr *)&cliaddr, addrlen) < 0)
perror("sendto");
/* continues to loop, use "Ctrl+C" to terminate listening */
}
} }