Function parse_flags

modules/rtpengine/rtpengine.c:2185–2568

#include "rtpengine_bracket.h"

static int parse_flags(struct ng_flags_parse *ng_flags, struct sip_msg *msg,
		enum rtpe_operation *op, const char *flags_str)
{
	char *e;
	const char *err;
	str key, val;
	int delete_delay;
	bencode_item_t *bitem;
	str iniface, outiface;

	if (!flags_str)
		return 0;

	iniface.len = outiface.len = 0;
	iniface.s = outiface.s = NULL;

	while (1) {
		while (*flags_str == ' ')
			flags_str++;

		key.s = (void *) flags_str;
		val.len = key.len = -1;
		val.s = NULL;

		e = strpbrk(key.s, " =");
		if (!e)
			e = key.s + strlen(key.s);
		else if (*e == '=') {
			key.len = e - key.s;
			val.s = e + 1;
			if (*val.s == '[') {
				/* bracket value: scan forward to the matching ']',
				 * tracking nesting depth so inner brackets like
				 * key=[a=[x y] b=[z]] are consumed as a single value */
				int depth = 0;
				for (e = val.s; *e; e++) {
					if (*e == '[') depth++;
					else if (*e == ']' && --depth == 0) { e++; break; }
				}
				if (depth != 0) {
					/* set val.len before error so the error handler
					 * can safely log the partial value with %.*s */
					val.len = e - val.s;
					err = "unmatched bracket in flag value";
					goto error;
				}
			} else {
				/* non-bracket value: terminate at next space */
				e = strchr(val.s, ' ');
				if (!e)
					e = val.s + strlen(val.s);
			}
			/* e now points past the value; compute length */
			val.len = e - val.s;
		}

		if (key.len == -1)
			key.len = e - key.s;