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#include <alloca.h>
#include <errno.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <pthread.h>
#include <string.h>
#define LOG_TAG "SocketClient"
#include <cutils/log.h>
#include <sysutils/SocketClient.h>
SocketClient::SocketClient(int socket)
: mSocket(socket)
, mPid(-1)
, mUid(-1)
, mGid(-1)
{
pthread_mutex_init(&mWriteMutex, NULL);
struct ucred creds;
socklen_t szCreds = sizeof(creds);
memset(&creds, 0, szCreds);
int err = getsockopt(socket, SOL_SOCKET, SO_PEERCRED, &creds, &szCreds);
if (err == 0) {
mPid = creds.pid;
mUid = creds.uid;
mGid = creds.gid;
}
}
int SocketClient::sendMsg(int code, const char *msg, bool addErrno) {
char *buf;
if (addErrno) {
buf = (char *) alloca(strlen(msg) + strlen(strerror(errno)) + 8);
sprintf(buf, "%.3d %s (%s)", code, msg, strerror(errno));
} else {
buf = (char *) alloca(strlen(msg) + strlen("XXX "));
sprintf(buf, "%.3d %s", code, msg);
}
return sendMsg(buf);
}
int SocketClient::sendMsg(const char *msg) {
if (mSocket < 0) {
errno = EHOSTUNREACH;
return -1;
}
// Send the message including null character
if (sendData(msg, strlen(msg) + 1) != 0) {
SLOGW("Unable to send msg '%s'", msg);
return -1;
}
return 0;
}
int SocketClient::sendData(const void* data, int len) {
int rc = 0;
const char *p = (const char*) data;
int brtw = len;
pthread_mutex_lock(&mWriteMutex);
while (brtw > 0) {
if ((rc = write(mSocket, p, brtw)) < 0) {
SLOGW("write error (%s)", strerror(errno));
pthread_mutex_unlock(&mWriteMutex);
return -1;
} else if (!rc) {
SLOGW("0 length write :(");
errno = EIO;
pthread_mutex_unlock(&mWriteMutex);
return -1;
}
p += rc;
brtw -= rc;
}
pthread_mutex_unlock(&mWriteMutex);
return 0;
}
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