Add -bootp option for slirp, by Anthony Liguori.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2439 c046a42c-6fe2-441c-8c8c-71466251a162

qemu-doc.texi

@@ -452,6 +452,16 @@ guest must be configured in binary mode (use the command @code{bin} of
 the Unix TFTP client). The host IP address on the guest is as usual
 10.0.2.2.
 
+@item -bootp file
+When using the user mode network stack, broadcast @var{file} as the BOOTP
+filename.  In conjunction with @option{-tftp}, this can be used to network boot
+a guest from a local directory.
+
+Example (using pxelinux):
+@example
+qemu -hda linux.img -boot n -tftp /path/to/tftp/files -bootp /pxelinux.0
+@end example
+
 @item -smb dir
 When using the user mode network stack, activate a built-in SMB
 server so that Windows OSes can access to the host files in @file{dir}

slirp/bootp.c

@@ -38,6 +38,8 @@ typedef struct {
 
 BOOTPClient bootp_clients[NB_ADDR];
 
+const char *bootp_filename;
+
 static const uint8_t rfc1533_cookie[] = { RFC1533_COOKIE };
 
 #ifdef DEBUG
@@ -168,6 +170,10 @@ static void bootp_reply(struct bootp_t *bp)
             goto new_addr;
         }
     }
+
+    if (bootp_filename)
+        snprintf(rbp->bp_file, sizeof(rbp->bp_file), "%s", bootp_filename);
+
     dprintf("offered addr=%08x\n", ntohl(daddr.sin_addr.s_addr));
 
     saddr.sin_addr.s_addr = htonl(ntohl(special_addr.s_addr) | CTL_ALIAS);

vl.c

@@ -6403,6 +6403,7 @@ void help(void)
            "\n"
 #ifdef CONFIG_SLIRP
            "-tftp prefix    allow tftp access to files starting with prefix [-net user]\n"
+           "-bootp file     advertise file in BOOTP replies\n"
 #ifndef _WIN32
            "-smb dir        allow SMB access to files in 'dir' [-net user]\n"
 #endif
@@ -6491,6 +6492,7 @@ enum {
 
     QEMU_OPTION_net,
     QEMU_OPTION_tftp,
+    QEMU_OPTION_bootp,
     QEMU_OPTION_smb,
     QEMU_OPTION_redir,
 
@@ -6567,6 +6569,7 @@ const QEMUOption qemu_options[] = {
     { "net", HAS_ARG, QEMU_OPTION_net},
 #ifdef CONFIG_SLIRP
     { "tftp", HAS_ARG, QEMU_OPTION_tftp },
+    { "bootp", HAS_ARG, QEMU_OPTION_bootp },
 #ifndef _WIN32
     { "smb", HAS_ARG, QEMU_OPTION_smb },
 #endif
@@ -7085,6 +7088,9 @@ int main(int argc, char **argv)
             case QEMU_OPTION_tftp:
 		tftp_prefix = optarg;
                 break;
+            case QEMU_OPTION_bootp:
+                bootp_filename = optarg;
+                break;
 #ifndef _WIN32
             case QEMU_OPTION_smb:
 		net_slirp_smb(optarg);

vl.h

@@ -159,6 +159,7 @@ extern int smp_cpus;
 extern int no_quit;
 extern int semihosting_enabled;
 extern int autostart;
+extern const char *bootp_filename;
 
 #define MAX_OPTION_ROMS 16
 extern const char *option_rom[MAX_OPTION_ROMS];