lwip1.2 的snmp模块， 共有6个文件 asn1_dec.c asn1.ens.c mib_structs.c mib2.c msg_in.c msg_out.c

with ASN.1 compiler you can get source code in C/C++ *.h and *.cpp file BSS_SS7.ASN1

S = a new stack of characters while ( there are still un-processed input characters ){ c = next un-processed character if ( c is an opening symbol ){