snmpv1_opts_t
snmpv1_opts_t *ctx;
snmpv1_opts_t *v1 = ctx;
snmpv1_opts_t *v1 = ctx;
snmpv1_opts_t *s1 = ctx1, *s2 = ctx2;
snmpv1_opts_t *s = ctx;
snmpv1_opts_t *snmpv1 = ctx;