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#include "ipc.h"
ipc_sender *setup_ipc_sender(struct str addr, int backlog){
ipc_sender *is = calloc(1, sizeof(ipc_sender));
is->addr = dup_str(addr);
is->ssocket = socket(AF_UNIX, SOCK_STREAM, 0);
if(is->ssocket == -1){
log_error("%s: socket: %s", __FUNCTION__, strerror(errno));
goto error;
}
struct sockaddr_un sockaddr = { .sun_family = AF_UNIX };
memcpy(sockaddr.sun_path, is->addr.ptr, is->addr.len);
sockaddr.sun_path[is->addr.len] = '\0';
unlink(is->addr.ptr);
if(bind(is->ssocket, (struct sockaddr*)&sockaddr, sizeof(sockaddr)) == -1){
log_error("%s: bind: %s", __FUNCTION__, strerror(errno));
goto error;
}
if(listen(is->ssocket, backlog) == -1){
log_error("%s: listen: %s", __FUNCTION__, strerror(errno));
goto error;
}
if(0){
error:
destroy_ipc_sender(&is);
}
return is;
}
void destroy_ipc_sender(ipc_sender **is){
if(*is != NULL){
close((*is)->ssocket);
(*is)->ssocket = -1;
unlink((*is)->addr.ptr);
free_str(&(*is)->addr);
free(*is);
*is = NULL;
}
}
ipc_listener *setup_ipc_listener(struct str saddr){
ipc_listener *il = calloc(1, sizeof(ipc_listener));
il->saddr = dup_str(saddr);
il->csocket = socket(AF_UNIX, SOCK_STREAM, 0);
if(il->csocket == -1){
log_error("%s: socket: %s", __FUNCTION__, strerror(errno));
goto error;
}
struct sockaddr_un socksaddr = { .sun_family = AF_UNIX };
memcpy(socksaddr.sun_path, il->saddr.ptr, il->saddr.len);
socksaddr.sun_path[il->saddr.len] = '\0';
if(connect(il->csocket, (struct sockaddr *)&socksaddr, sizeof(socksaddr)) == -1){
log_error("%s: connect: %s", __FUNCTION__, strerror(errno));
goto error;
}
if(0){
error:
destroy_ipc_listener(&il);
}
return il;
}
void destroy_ipc_listener(ipc_listener **il){
if(*il != NULL){
close((*il)->csocket);
(*il)->csocket = -1;
free_str(&(*il)->saddr);
free(*il);
*il = NULL;
}
}
void free_ipc_message(ipc_message im){
free_str(&im.key);
free_str(&im.val);
}
static inline struct str ipc_message_to_str(ipc_message msg){
struct str smsg = nstr(msg.key.len + msg.val.len + 2*sizeof(u32));
memcpy(smsg.ptr+smsg.len, &msg.key.len, sizeof(msg.key.len));
smsg.len += sizeof(msg.key.len);
copy_str(smsg, msg.key);
memcpy(smsg.ptr+smsg.len, &msg.val.len, sizeof(msg.val.len));
smsg.len += sizeof(msg.val.len);
copy_str(smsg, msg.val);
return smsg;
}
int send_ipc_message(int to, ipc_message msg){
struct str smsg = ipc_message_to_str(msg);
if(send(to, smsg.ptr, smsg.len, 0) == -1){
log_error("cant send message to socket %d: %s", to, strerror(errno));
free_str(&smsg);
return 1;
}
free_str(&smsg);
char buf[2];
if(recv(to, buf, 2, 0) == -1){
log_error("receiving OK from listener");
return 1;
}
if(strncmp(buf, "OK", 2) != 0){
log_error("received '%s' from listener instead of 'OK'", buf);
return 1;
}
return 0;
}
static inline ipc_message str_to_ipc_message(struct str smsg){
struct ipc_message msg;
u32 l;
memcpy(&l, smsg.ptr, sizeof(l));
smsg.ptr += sizeof(l);
msg.key = nstr(l);
msg.key.len = l;
memcpy(msg.key.ptr, smsg.ptr, l);
smsg.ptr += l;
memcpy(&l, smsg.ptr, sizeof(l));
smsg.ptr += sizeof(l);
msg.val = nstr(l);
msg.val.len = l;
memcpy(msg.val.ptr, smsg.ptr, l);
return msg;
}
ipc_message receive_ipc_message(ipc_listener *il){
struct str smsg = nstr(MAX_IPC_MSG_LEN); // we are gonna have to poll btw
ipc_message msg = {0};
smsg.len = recv(il->csocket, smsg.ptr, smsg.cap, 0);
if(smsg.len == -1){
log_error("cant receive message from socket %d: %s", il->csocket, strerror(errno));
}else{
msg = str_to_ipc_message(smsg);
}
if(send(il->csocket, "OK", slen("OK"), 0) == -1){
log_error("sending 'OK' to sender");
}
return msg;
}
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