Completely rewrite how joined IPs are saved and written... again

- Use strlcpy instead of strcpy to prevent footguns
- Use fprintf instead of raw fputs
- Enforce consistent MAX_LOGIP (255) length for each component instead of a combination of magic number 255 and MAXSTRINGLENGTH (32!?) depending on where you look
- Fix fun memory leak in waiting
- Avoid pointless strlens

src/d_clisrv.c

@@ -2425,7 +2425,7 @@ static void Command_connect(void)
 
 				// Last IPs joined:
 				// Keep the address we typed in memory so that we can save it if we *succesfully* join the server
-				strcpy(joinedIP, COM_Argv(1));
+				strlcpy(joinedIP, COM_Argv(1), MAX_LOGIP);
 			}
 			else
 			{

src/k_menudraw.c

@@ -2417,7 +2417,7 @@ void M_DrawMPJoinIP(void)
 			case IT_STRING:
 			{
 
-				char str[MAXSTRINGLENGTH];
+				char str[MAX_LOGIP];
 				strcpy(str, currentMenu->menuitems[i].text);
 
 				// The last 3 options of this menu are to be the joined IP addresses...
@@ -2430,9 +2430,9 @@ void M_DrawMPJoinIP(void)
 					}
 
 					if (joinedIPlist[index][1][0])	// Try drawing server name
-						strcpy(str, joinedIPlist[index][1]);
+						strlcpy(str, joinedIPlist[index][1], MAX_LOGIP);
 					else if (joinedIPlist[index][0][0])	// If that fails, get the address
-						strcpy(str, joinedIPlist[index][0]);
+						strlcpy(str, joinedIPlist[index][0], MAX_LOGIP);
 					else
 						strcpy(str, "---");		// If that fails too then there's nothing!
 				}

src/k_menufunc.c

@@ -3875,7 +3875,7 @@ boolean M_JoinIPInputs(INT32 ch)
 		M_SetMenuDelay(pid);
 
 		// Is there an address at this part of the table?
-		if (strlen(joinedIPlist[index][0]))
+		if (*joinedIPlist[index][0])
 			M_JoinIP(joinedIPlist[index][0]);
 		else
 			S_StartSound(NULL, sfx_lose);

src/m_misc.c

@@ -179,8 +179,8 @@ boolean takescreenshot = false; // Take a screenshot this tic
 
 moviemode_t moviemode = MM_OFF;
 
-char joinedIPlist[NUMLOGIP][2][255];
-char joinedIP[255];
+char joinedIPlist[NUMLOGIP][2][MAX_LOGIP];
+char joinedIP[MAX_LOGIP];
 
 // This initializes the above array to have NULL evrywhere it should.
 void M_InitJoinedIPArray(void)
@@ -198,7 +198,7 @@ void M_AddToJoinedIPs(char *address, char *servname)
 	UINT8 i = 0;
 
 	// Check for dupes...
-	for (i = 0; i < NUMLOGIP-1; i++)
+	for (i = 0; i < NUMLOGIP-1; i++) // intentionally not < NUMLOGIP
 	{
 		// Check the addresses
 		if (strcmp(joinedIPlist[i][0], address) == 0)
@@ -212,13 +212,13 @@ void M_AddToJoinedIPs(char *address, char *servname)
 	// Start by moving every IP up 1 slot (dropping the last IP in the table)
 	for (; i; i--)
 	{
-		strcpy(joinedIPlist[i][0], joinedIPlist[i-1][0]);
-		strcpy(joinedIPlist[i][1], joinedIPlist[i-1][1]);
+		strlcpy(joinedIPlist[i][0], joinedIPlist[i-1][0], MAX_LOGIP);
+		strlcpy(joinedIPlist[i][1], joinedIPlist[i-1][1], MAX_LOGIP);
 	}
 
 	// and add the new IP at the start of the table!
-	strcpy(joinedIPlist[0][0], address);
-	strcpy(joinedIPlist[0][1], servname);
+	strlcpy(joinedIPlist[0][0], address, MAX_LOGIP);
+	strlcpy(joinedIPlist[0][1], servname, MAX_LOGIP);
 }
 
 // ==========================================================================
@@ -471,34 +471,24 @@ void M_SaveJoinedIPs(void)
 {
 	FILE *f = NULL;
 	UINT8 i;
-	char *filepath;
+	const char *filepath = va("%s"PATHSEP"%s", srb2home, IPLOGFILE);
 
-	if (!strlen(joinedIPlist[0][0]))
+	if (!*joinedIPlist[0][0])
 		return;	// Don't bother, there's nothing to save.
 
-	// append srb2home to beginning of filename
-	// but check if srb2home isn't already there, first
-	if (!strstr(IPLOGFILE, srb2home))
-		filepath = va(pandf,srb2home, IPLOGFILE);
-	else
-		filepath = Z_StrDup(IPLOGFILE);
-
 	f = fopen(filepath, "w");
 
-	if (f == NULL)
-		return;	// Uh I guess you don't have disk space?????????
-
-	for (i=0; i < NUMLOGIP; i++)
+	if (!f)
 	{
-		if (strlen(joinedIPlist[i][0]))
-		{
-			char savestring[MAXSTRINGLENGTH];
-			strcpy(savestring, joinedIPlist[i][0]);
-			strcat(savestring, IPLOGFILESEP);
-			strcat(savestring, joinedIPlist[i][1]);
+		CONS_Alert(CONS_WARNING, "Could not save recent IP list into %s\n", IPLOGFILE);
+		return;
+	}
 
-			fputs(savestring, f);
-			fputs("\n", f);	// Because this won't do it automatically now will it...
+	for (i = 0; i < NUMLOGIP; i++)
+	{
+		if (*joinedIPlist[i][0])
+		{
+			fprintf(f, "%s%s%s\n", joinedIPlist[i][0], IPLOGFILESEP, joinedIPlist[i][1]);
 		}
 	}
 
@@ -513,7 +503,7 @@ void M_LoadJoinedIPs(void)
 	UINT8 i = 0;
 	char *filepath;
 	char *s;
-	char content[255];	// 255 is more than long enough!
+	char buffer[2*(MAX_LOGIP+1)];
 
 	filepath = va("%s"PATHSEP"%s", srb2home, IPLOGFILE);
 	f = fopen(filepath, "r");
@@ -521,27 +511,30 @@ void M_LoadJoinedIPs(void)
 	if (f == NULL)
 		return;	// File doesn't exist? sure, just do nothing then.
 
-	while (fgets(content, 255, f) && i < NUMLOGIP && content[0] && content[0] != '\n')	// Don't let us write more than we can chew!
+	for (i = 0; fgets(buffer, (int)sizeof(buffer), f); i++)	// Don't let us write more than we can chew!
 	{
+		if (i >= NUMLOGIP)
+			break;
 
-		// Now we have garbage under the form of "address;string"
-		// Now you might ask yourself, but what do we do if the player fucked with their file and now there's a bunch of garbage?
-		// ...Well that's not my problem lol.
+		if (!*buffer || *buffer == '\n')
+			break;
 
-		s = strtok(content, IPLOGFILESEP);	// We got the address
-		strcpy(joinedIPlist[i][0], s);
+		s = strtok(buffer, IPLOGFILESEP);	// We got the address
+		strlcpy(joinedIPlist[i][0], s, MAX_LOGIP);
 
 		s = strtok(NULL, IPLOGFILESEP);	// Let's get rid of this awful \n while we're here!
 
 		if (s)
 		{
+			UINT16 j = 1;
 			//strcpy(joinedIPlist[i][1], s); -- get rid of \n too...
 			char *c = joinedIPlist[i][1];
-			while (*s && *s != '\n')
+			while (*s && *s != '\n' && j < MAX_LOGIP)
 			{
 				*c = *s;
 				s++;
 				c++;
+				j++;
 			}
 			*c = '\0';
 		}

src/m_misc.h

@@ -46,15 +46,15 @@ void M_StopMovie(void);
 #define IPLOGFILE "ringsavedips.txt"
 #define IPLOGFILESEP ";"
 #define NUMLOGIP 3
+#define MAX_LOGIP 255
 
 // Array where we'll store addresses to display for last servers joined
 // {address, servame}
-// 255 is long enough to store the text
-extern char joinedIPlist[NUMLOGIP][2][255];
+extern char joinedIPlist[NUMLOGIP][2][MAX_LOGIP];
 
 // Keep the address we're joining in mind until we've finished joining.
 // Since we don't wanna add an IP address we aren't even sure worked out.
-extern char joinedIP[255];
+extern char joinedIP[MAX_LOGIP];
 
 void M_InitJoinedIPArray(void);
 void M_AddToJoinedIPs(char *address, char *servname);