/* ------------------------------------------------------------- **
** Removes one line of control stream from buf (up to '\r\n'). <= 5
** chars are returned in cmd (up to 4 + \0), and <= MAX_LINE_LEN in
** arg. Must accept any NULL terminated buf and give sane output.
**
** returns 0 on success, 1 if there is not a complete line in
** buf, and -X on non-sane buf. contents of buf unchanged on
** return(1), undefined on return(-X)
** ------------------------------------------------------------- */
int extract_clientcmd(sstr * buf, sstr ** pcmd, sstr ** parg)
{
static sstr *cmd = NULL, *arg = NULL;
if(!cmd)
cmd = sstr_init(4);
if(!arg)
arg = sstr_init(MAX_LINE_LEN);
if(pcmd)
*pcmd = cmd;
if(parg)
*parg = arg;
if(!sstr_hasline(buf))
return (1);
switch (sstr_token(buf, cmd, " \t\n\r", 0)) {
case -1: /*Token doesn't fit in cmd */
return (-1);
case ' ':
case '\t':
sstr_token(buf, arg, "\r\n", 0);
break;
default: /*end of line */
sstr_empty(arg);
}
if(!config.nonasciiok)
sstr_makeprintable(arg, '?');
return (0);
}
static int _cmd_to_proto(char **target, const char *format, va_list ap) {
const char *c = format;
char *cmd = NULL; /* final command */
int pos; /* position in final command */
sstr curarg, newarg;
int touched = 0; /* was the current argument touched? */
char **curargv = NULL, **newargv = NULL;
int argc = 0;
int totlen = 0;
int j;
/* Abort if there is not target to set */
if (target == NULL)
return -1;
/* Build the command string accordingly to protocol */
curarg = sstr_empty();
if (curarg == NULL)
return -1;
while(*c != '\0') {
if (*c != '%' || c[1] == '\0') {
if (*c == ' ') {
if (touched) {
newargv = realloc(curargv,sizeof(char*)*(argc+1));
if (newargv == NULL) goto err;
curargv = newargv;
curargv[argc++] = curarg;
totlen += bulklen(sstr_len(curarg));
/* curarg is put in argv so it can be overwritten. */
curarg = sstr_empty();
if (curarg == NULL) goto err;
touched = 0;
}
} else {
newarg = sstr_catlen(curarg,c,1);
if (newarg == NULL) goto err;
curarg = newarg;
touched = 1;
}
} else {
char *arg;
size_t size;
/* Set newarg so it can be checked even if it is not touched. */
newarg = curarg;
switch(c[1]) {
case 's':
arg = va_arg(ap,char*);
size = strlen(arg);
if (size > 0)
newarg = sstr_catlen(curarg,arg,size);
break;
case 'b':
arg = va_arg(ap,char*);
size = va_arg(ap,size_t);
if (size > 0)
newarg = sstr_catlen(curarg,arg,size);
break;
case '%':
newarg = sstr_cat(curarg,"%");
break;
default:
/* Try to detect printf format */
{
static const char intfmts[] = "diouxX";
char _format[16];
const char *_p = c+1;
size_t _l = 0;
va_list _cpy;
/* Flags */
if (*_p != '\0' && *_p == '#') _p++;
if (*_p != '\0' && *_p == '0') _p++;
if (*_p != '\0' && *_p == '-') _p++;
if (*_p != '\0' && *_p == ' ') _p++;
if (*_p != '\0' && *_p == '+') _p++;
/* Field width */
while (*_p != '\0' && isdigit(*_p)) _p++;
/* Precision */
if (*_p == '.') {
_p++;
while (*_p != '\0' && isdigit(*_p)) _p++;
}
/* Copy va_list before consuming with va_arg */
va_copy(_cpy,ap);
/* Integer conversion (without modifiers) */
if (strchr(intfmts,*_p) != NULL) {
va_arg(ap,int);
goto fmt_valid;
}
/* Double conversion (without modifiers) */
if (strchr("eEfFgGaA",*_p) != NULL) {
va_arg(ap,double);
goto fmt_valid;
}
/* Size: char */
if (_p[0] == 'h' && _p[1] == 'h') {
_p += 2;
if (*_p != '\0' && strchr(intfmts,*_p) != NULL) {
va_arg(ap,int); /* char gets promoted to int */
goto fmt_valid;
}
goto fmt_invalid;
}
/* Size: short */
if (_p[0] == 'h') {
_p += 1;
if (*_p != '\0' && strchr(intfmts,*_p) != NULL) {
va_arg(ap,int); /* short gets promoted to int */
goto fmt_valid;
}
goto fmt_invalid;
}
/* Size: long long */
if (_p[0] == 'l' && _p[1] == 'l') {
_p += 2;
if (*_p != '\0' && strchr(intfmts,*_p) != NULL) {
va_arg(ap,long long);
goto fmt_valid;
}
goto fmt_invalid;
}
/* Size: long */
if (_p[0] == 'l') {
_p += 1;
if (*_p != '\0' && strchr(intfmts,*_p) != NULL) {
va_arg(ap,long);
goto fmt_valid;
}
goto fmt_invalid;
}
fmt_invalid:
va_end(_cpy);
goto err;
fmt_valid:
_l = (_p+1)-c;
if (_l < sizeof(_format)-2) {
memcpy(_format,c,_l);
_format[_l] = '\0';
newarg = sstr_catvprintf(curarg,_format,_cpy);
/* Update current position (note: outer blocks
* increment c twice so compensate here) */
c = _p-1;
}
va_end(_cpy);
break;
}
}
if (newarg == NULL) goto err;
curarg = newarg;
touched = 1;
c++;
}
c++;
}
/* Add the last argument if needed */
if (touched) {
newargv = realloc(curargv,sizeof(char*)*(argc+1));
if (newargv == NULL) goto err;
curargv = newargv;
curargv[argc++] = curarg;
totlen += bulklen(sstr_len(curarg));
} else {
sstr_free(curarg);
}
/* Clear curarg because it was put in curargv or was free'd. */
curarg = NULL;
/* Add bytes needed to hold multi bulk count */
totlen += 1+intlen(argc)+2;
/* Build the command at protocol level */
cmd = malloc(totlen+1);
if (cmd == NULL) goto err;
pos = sprintf(cmd,"*%d\r\n",argc);
for (j = 0; j < argc; j++) {
pos += sprintf(cmd+pos,"$%zu\r\n",sstr_len(curargv[j]));
memcpy(cmd+pos,curargv[j],sstr_len(curargv[j]));
pos += sstr_len(curargv[j]);
sstr_free(curargv[j]);
cmd[pos++] = '\r';
cmd[pos++] = '\n';
}
assert(pos == totlen);
cmd[pos] = '\0';
free(curargv);
*target = cmd;
return totlen;
err:
while(argc--)
sstr_free(curargv[argc]);
free(curargv);
if (curarg != NULL)
sstr_free(curarg);
/* No need to check cmd since it is the last statement that can fail,
* but do it anyway to be as defensive as possible. */
if (cmd != NULL)
free(cmd);
return -1;
}