定義一個字符指針數組
char *mParams[NL_PARAMS_MAX];
用asprintf格式化字符串
asprintf(&mParams[0], "ADDRESS=%s/%d", addrstr, ifaddr->ifa_prefixlen);
asprintf(&mParams[1], "INTERFACE=%s", ifname);
asprintf(&mParams[2], "FLAGS=%u", ifaddr->ifa_flags);
asprintf(&mParams[3], "SCOPE=%u", ifaddr->ifa_scope);
asprintf(&mParams[4], "IFINDEX=%u", ifaddr->ifa_index);
const char *NetlinkEvent::findParam(const char *paramName) {
size_t len = strlen(paramName);
for (int i = 0; i < NL_PARAMS_MAX && mParams[i] != NULL; ++i) {
const char *ptr = mParams[i] + len;
if (!strncmp(mParams[i], paramName, len) && *ptr == '=')
return ++ptr;
}
SLOGE("NetlinkEvent::FindParam(): Parameter '%s' not found", paramName);
return NULL;
}
注意asprint 使用完需要釋放
for (i = 0; i < NL_PARAMS_MAX; i++) {
if (!mParams[i])
break;
free(mParams[i]);
}