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Fix assertion error on pcap nsock_iod reuse

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Discussion: http://seclists.org/nmap-dev/2012/q3/458
This commit is contained in:
dmiller
2012-07-31 16:20:43 +00:00
parent 60d1720d4c
commit 92008abcfa
1 changed files with 5 additions and 5 deletions
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10
nse_nsock.cc
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@@ -913,6 +913,7 @@ static int l_pcap_open (lua_State *L)
nsock_iod *nsiod = (nsock_iod *) lua_touserdata(L, -1);
if (nsiod == NULL) /* does not exist */
{
lua_pop(L, 1); /* the nonexistant socket */
nsiod = (nsock_iod *) lua_newuserdata(L, sizeof(nsock_iod));
lua_pushvalue(L, PCAP_SOCKET);
lua_setmetatable(L, -2);
@@ -920,16 +921,15 @@ static int l_pcap_open (lua_State *L)
lua_pushvalue(L, 7); /* the pcap socket key */
lua_pushvalue(L, -2); /* the pcap socket nsiod */
lua_rawset(L, KEY_PCAP); /* KEY_PCAP["dev|snap|promis|bpf"] = pcap_nsiod */
lua_getuservalue(L, 1); /* the socket user value */
lua_pushvalue(L, -2); /* the pcap socket nsiod */
lua_pushboolean(L, 1); /* dummy variable */
lua_rawset(L, -3);
lua_pop(L, 1); /* the socket user value */
char *e = nsock_pcap_open(nsp, *nsiod, lua_tostring(L, 6), snaplen,
lua_toboolean(L, 4), bpf);
if (e)
luaL_error(L, "%s", e);
}
lua_getuservalue(L, 1); /* the socket user value */
lua_pushvalue(L, -2); /* the pcap socket nsiod */
lua_pushboolean(L, 1); /* dummy variable */
lua_rawset(L, -3);
nu->nsiod = *nsiod;
nu->is_pcap = 1;
return 0;