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/*
* Socket operations for wellenreiter
*
* $Id$
*/
#include "sock.hh"
#include "log.hh"
/* Setup UDP Socket for incoming commands */
int commsock(const char *host, int port)
{
struct sockaddr_in saddr;
int sock;
if((sock=socket(AF_INET, SOCK_DGRAM, 0)) < 0)
{
wl_logerr("Cannot set up socket: %s", strerror(errno));
return -1;
}
memset(&saddr, 0, sizeof(saddr));
saddr.sin_family = PF_INET;
saddr.sin_port = htons(port);
saddr.sin_addr.s_addr = inet_addr(host);
if(bind(sock,(struct sockaddr *)&saddr, sizeof(saddr)) < 0)
{
wl_logerr("Cannot bind socket: %s", strerror(errno));
close(sock);
return -1;
}
return sock;
}
/* Send a string to commsock */
int sendcomm(const char *host, int port, const char *string, ...)
{
int sock;
char buffer[4096];
struct sockaddr_in saddr;
va_list ap;
/* Generate string */
memset(buffer, 0, sizeof(buffer));
va_start(ap, string);
vsnprintf(buffer, sizeof(buffer)-1, string, ap);
va_end(ap);
saddr.sin_family = AF_INET;
saddr.sin_port = htons(port);
saddr.sin_addr.s_addr = inet_addr(host);
/* Setup socket */
if((sock=socket(AF_INET, SOCK_DGRAM, 0)) < 0)
{
wl_logerr("Cannot set up socket: %s", strerror(errno));
return -1;
}
if(sendto(sock, buffer, sizeof(buffer), 0, (struct sockaddr *)&saddr, sizeof(saddr)) < 0)
{
wl_logerr("Cannot write to socket: %s", strerror(errno));
close(sock);
return 0;
}
if(close(sock) < 0)
wl_logerr("Cannot close socket: %s", strerror(errno));
return 1;
}
/* Check for new messages on commsock */
int recvcomm(int *sock, char *out, int maxlen)
{
struct sockaddr_in *cliaddr;
socklen_t len=sizeof(struct sockaddr);
char buffer[128], retval[3];
memset(buffer, 0, sizeof(buffer));
if(recvfrom(*sock, buffer, sizeof(buffer)-1, 0, (struct sockaddr *)cliaddr, &len) < 0)
return -1;
memset(out, 0, maxlen);
memcpy(out, buffer, maxlen - 1);
memset(retval, 0, sizeof(retval));
memcpy(retval, out, 2);
return atoi(retval);
}
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