diff options
Diffstat (limited to 'forward.c')
| -rw-r--r-- | forward.c | 12 |
1 files changed, 11 insertions, 1 deletions
@@ -31,6 +31,7 @@ #include "mss.h" #include "event.h" #include "ps.h" +#include "dhcp.h" #include "memdbg.h" @@ -976,6 +977,8 @@ process_ipv4_header (struct context *c, unsigned int flags, struct buffer *buf) if (!c->options.passtos) flags &= ~PIPV4_PASSTOS; #endif + if (!c->options.route_gateway_via_dhcp || !route_list_default_gateway_needed (c->c1.route_list)) + flags &= ~PIPV4_EXTRACT_DHCP_ROUTER; if (buf->len > 0) { @@ -1001,6 +1004,13 @@ process_ipv4_header (struct context *c, unsigned int flags, struct buffer *buf) /* possibly alter the TCP MSS */ if (flags & PIPV4_MSSFIX) mss_fixup (&ipbuf, MTU_TO_MSS (TUN_MTU_SIZE_DYNAMIC (&c->c2.frame))); + + /* possibly extract a DHCP router message */ + if (flags & PIPV4_EXTRACT_DHCP_ROUTER) + { + const in_addr_t dhcp_router = dhcp_extract_router_msg (&ipbuf); + route_list_add_default_gateway (c->c1.route_list, c->c2.es, dhcp_router); + } } } } @@ -1149,7 +1159,7 @@ process_outgoing_tun (struct context *c) * The --mssfix option requires * us to examine the IPv4 header. */ - process_ipv4_header (c, PIPV4_MSSFIX|PIPV4_OUTGOING, &c->c2.to_tun); + process_ipv4_header (c, PIPV4_MSSFIX|PIPV4_EXTRACT_DHCP_ROUTER|PIPV4_OUTGOING, &c->c2.to_tun); if (c->c2.to_tun.len <= MAX_RW_SIZE_TUN (&c->c2.frame)) { |