60     int rv = getnameinfo(sa, sa_len, host_str, sizeof(host_str), nullptr, 0,  in addr2str()
161         if (cur == nullptr) {  in read()
163             return nullptr;  in read()
176             return nullptr;  in write()
182             return nullptr;  in write()
186             return nullptr;  in write()
203         return nullptr;  in parseField()
216             return nullptr;  in parseField()
223         return nullptr;  in parseField()
226     return nullptr;  in parseField()
240     if (cur == nullptr) {  in read()
242         return nullptr;  in read()
246         return nullptr;  in read()
255     if (buffer_cur == nullptr) return nullptr;  in write()
258         return nullptr;  in write()
298     if (cur == nullptr) {  in read()
300         return nullptr;  in read()
304     if (cur == nullptr) {  in read()
306         return nullptr;  in read()
310         return nullptr;  in read()
318     if (buffer_cur == nullptr) return nullptr;  in write()
320     if (buffer_cur == nullptr) return nullptr;  in write()
323         return nullptr;  in write()
339         return nullptr;  in readIntFields()
353         return nullptr;  in writeIntFields()
403     if (cur == nullptr) {  in read()
405         return nullptr;  in read()
411             if (cur == nullptr) {  in read()
413                 return nullptr;  in read()
421             if (cur == nullptr) {  in read()
423                 return nullptr;  in read()
431             if (cur == nullptr) {  in read()
433                 return nullptr;  in read()
441             if (cur == nullptr) {  in read()
443                 return nullptr;  in read()
453         return nullptr;  in write()
470         if (buffer_cur == nullptr) return nullptr;  in write()
474         if (buffer_cur == nullptr) return nullptr;  in write()
478         if (buffer_cur == nullptr) return nullptr;  in write()
482         if (buffer_cur == nullptr) return nullptr;  in write()
714             if (cur == nullptr) ALOGI("response is flawed");  in requestHandler()
730     if (cur == nullptr) {  in handleDNSRequest()
783     if (response_cur == nullptr) {  in handleDNSRequest()
835     if (response_cur == nullptr) return false;  in makeErrorResponse()