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libipc-old/remote/lib/msg.c

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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "msg.h"
#include "../../core/error.h"
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void remote_message_serialize (const struct remoted_msg *msg, char **data, size_t *len)
{
if (msg == NULL) {
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handle_err ("remote remote_message_serialize", "msg == NULL");
return;
}
if (data == NULL) {
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handle_err ("remote remote_message_serialize", "data == NULL");
return;
}
if (*data != NULL) {
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handle_err ("remote remote_message_serialize", "*data != NULL");
return;
}
if (len == NULL) {
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handle_err ("remote remote_message_serialize", "len == NULL");
return;
}
// buflen = remote msg type (1) + size_t (16) + data
size_t buflen = 1 + sizeof (size_t) + msg->datalen;
if (buflen > BUFSIZ) {
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handle_err ("remote remote_message_serialize", "datalen too high");
return;
}
char *buf = malloc (buflen);
memset (buf, 0, buflen);
size_t offset = 0;
// msg type
buf[offset++] = msg->type;
// data
memcpy (buf + offset, &msg->datalen, sizeof (size_t));
offset += sizeof (size_t);
memcpy (buf + offset, msg->data, msg->datalen);
offset += msg->datalen;
*data = buf;
*len = buflen;
}
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void remote_message_unserialize (struct remoted_msg *msg, const char *buf, size_t mlen)
{
if (msg == NULL) {
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handle_err ("remote remote_message_unserialize", "msg == NULL");
return;
}
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remote_message_free (msg);
if (mlen > BUFSIZ) {
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handle_err ("remote remote_message_unserialize", "mlen > BUFSIZ");
return;
}
size_t offset = 0;
// msg type
msg->type = buf[offset++];
// data
memcpy (&msg->datalen, buf + offset, sizeof (size_t));
if (msg->datalen > BUFSIZ) {
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handle_err ("remote remote_message_unserialize", "datalen > BUFSIZ");
return;
}
msg->data = malloc (msg->datalen);
memset (msg->data, 0, msg->datalen);
offset += sizeof (size_t);
memcpy (msg->data, buf + offset, msg->datalen);
offset += msg->datalen;
}
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void remote_message_free (struct remoted_msg *msg)
{
if (msg == NULL) {
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handle_err ("remote remote_message_free", "msg == NULL");
return;
}
if (msg->data) {
free (msg->data);
msg->data = NULL;
}
}
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void remote_message_print (const struct remoted_msg *msg)
{
if (msg == NULL) {
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handle_err ("remote remote_message_print", "msg == NULL");
return;
}
printf ("msg: type=%d data=%s\n", msg->type, msg->data);
}